KR102232462B1 - Autostereoscopic 3d display device - Google Patents

Abstract

The autostereoscopic 3D image display device of the present invention sets the width of a viewing diamond to a/n (a, n is a natural number satisfying the condition of a <n) times the binocular spacing without changing the image panel or 3D filter. At the same time, it is characterized in that it is configured to overlap viewing diamonds. In addition, it is characterized in that the same or similar input data is newly mapped between adjacent views through a view data rendering process.
In this case, the reduced viewing distance may be extended by converting at least a part of the input data of the multi-view into input data of another view through optimal viewing distance control.

Description

Glasses-free 3D display device {AUTOSTEREOSCOPIC 3D DISPLAY DEVICE}

The present invention relates to a stereoscopic image display device, and more particularly, to an autostereoscopic stereoscopic image display device in a manner that does not wear glasses.

A 3D display can be simply defined as "the whole of a system that artificially reproduces a 3D screen."

Here, the system includes both a software technology that can be viewed in 3D and a hardware that actually implements the contents created by the software technology in 3D. The reason for including the software area is that, in the case of 3D display hardware, content configured in a separate software method is required for each stereoscopic implementation method.

In addition, a virtual 3D display (hereinafter referred to as a three-dimensional image display device) uses binocular disparity that appears when our eyes are about 65 mm apart in the horizontal direction, among several factors that a person feels a three-dimensional effect. It is literally the whole of a system that allows you to feel a three-dimensional effect virtually. In other words, because of binocular parallax, even if our eyes look at the same object, each of them sees slightly different images (to be precise, it has slightly different spatial information on the left and right), and when these two images are transmitted to the brain through the retina, the brain will By precisely fusing each other, we can feel a three-dimensional effect, and it is a three-dimensional image display device that creates a virtual three-dimensional effect through design that simultaneously displays two left and right images on a 2D display device and sends them to each eye. .

In order to display images of two channels on one screen in such a stereoscopic image display device, in most cases, one screen is outputted one channel at a time by changing a line in a horizontal or vertical direction. When images of two channels are simultaneously output from one display device, in the case of a glasses-free system, due to the hardware structure, the right image goes into the right eye as it is, and the left image goes into the left eye only. In addition, in the case of wearing glasses, the right image is covered so that the left eye cannot see it through special glasses suitable for each method, and the left image is covered so that the right eye cannot see it.

In this way, the most important factor for a person's sense of three-dimensional effect and depth is binocular parallax due to the gap between the two eyes, but there is also a deep relationship to psychological and memory factors. Based on whether 3D image information of a degree can be provided, it is usually classified into a volumetric expression method, a three-dimensional expression method (holographic type), and a stereoscopic type expression method.

The volume expression method is a method to feel the perspective of the depth direction by psychological factors and inhalation effects.Three-dimensional computer graphics that display perspective, superposition, shadows, contrast, movement, etc. by calculation, or viewing angle to the observer It is applied to the so-called IMAX movie, which provides an optical illusion of being sucked into the space by providing this large screen.

The three-dimensional representation method known as the most complete stereoscopic image realization technology can be represented by laser light reproduction holography or white light reproduction holography.

In addition, the three-dimensional expression method is a method of feeling a three-dimensional effect by using physiological factors of both eyes. As described above, when a plane related image containing parallax information is seen in the left and right eyes of a human being approximately 65 mm apart, the brain In the process of fusing them, it uses the ability to feel a three-dimensional effect by generating spatial information before and after the display surface, that is, stereoography. These three-dimensional expression methods are largely divided into a method of wearing glasses and a method of wearing glasses without glasses.

Typical known methods of not wearing glasses include a lenticular lens method and a parallax barrier method in which a lenticular lens plate in which cylindrical lenses are arranged vertically is installed in front of an image panel.

1 is a diagram for explaining the concept of a general lenticular lens type 3D image display device, and shows the relationship between the rear distance S of the lens and the viewing distance d.

In addition, FIG. 2 is a diagram illustrating a general lenticular lens type 3D image display device and an optical profile as an example.

At this time, the center of FIG. 2 shows a viewing diamond forming a viewing zone, a light profile, and view data, and a view that is actually perceived in the viewing diamond is schematically shown at the bottom of FIG. have.

1 and 2, a general lenticular lens type 3D image display device is located on the upper and lower substrates, and a liquid crystal panel 10 filled with liquid crystal therebetween, and a rear surface of the liquid crystal panel 10. It includes a backlight unit (not shown) that irradiates light and a lenticular lens plate 20 positioned on the front surface of the liquid crystal panel 10 for realizing a three-dimensional image.

The lenticular lens plate 20 is formed by forming a plurality of lenticular lenses 25 on a flat substrate and having an upper surface of a material layer having a convex lens shape.

The lenticular lens plate 20 serves to divide the left and right eye images, and the optimal viewing distance d from the lenticular lens plate 20 is a diamond in which images corresponding to the left and right eyes normally reach the left and right eyes respectively. A shaped viewing diamond (present region) 30 is formed.

One width of the viewing diamond 30 is formed in the size of the viewer's binocular spacing (e), which is to recognize as a stereoscopic image by inputting an image having a parallax on the viewer's left eye and right eye respectively.

At this time, view data, that is, an image, of a sub-pixel of the liquid crystal panel 10 corresponding to each viewing diamond 30 is formed.

The view data refers to an image captured by a camera that is separated by a criterion of the binocular spacing (e).

In such a general lenticular lens type 3D image display device, the liquid crystal panel 10 and the lenticular lens plate 20 are supported by a device (not shown), so that a predetermined distance between the liquid crystal panel 10 and the lenticular lens plate 20 (Rear distance; S) spaced apart.

At this time, in a general lenticular lens type 3D image display device, a gap glass 26 is inserted to keep the rear distance S constant.

As described above, in a 3D image display device of a lenticular lens type, since it is implemented in a multi view method formed according to an initially designed view map, a 3D image is displayed when the viewer enters the specified view area. You can watch.

At this time, when looking at the optical profile measured at the optimal viewing distance d with reference to FIG. 2, it can be seen that the intensity of the light at the center of the viewing diamond 30 is highest and decreases toward the end of the viewing diamond 30. . The difference between the highest point and the lowest point of the light intensity can be defined as the luminance difference (LD) (△L). It has a great influence.

On the other hand, an image difference between views perceived by the viewer moving the position between the viewing diamonds 30 is referred to as image flipping, and the difference is recognized as the maximum when moving from the right time to the right time as well. Accordingly, as the number of views increases, the difference in the image between the first view data and the last view data increases, and accordingly, the image flipping phenomenon also increases.

The present invention is to solve the above problem, and eliminate or minimize 3D crosstalk, luminance deviation, and image flipping of a stereoscopic image without changing an image panel or a 3D filter, thereby improving the depth of the stereoscopic image. It is an object to provide an autostereoscopic 3D image display device.

In addition, other objects and features of the present invention will be described in the configuration and claims of the invention to be described later.

In order to achieve the above object, the autostereoscopic 3D image display device according to an embodiment of the present invention is disposed on the front side of the image panel and the image panel, and a 3D filter and image to form a viewing diamond at a viewing distance. It includes a gap glass that maintains the gap between the panel and the 3D filter, and sets the width of the viewing diamond to a/n times the binocular spacing (a, n is a natural number that satisfies a <n condition) and overlaps the viewing diamond with each other. It is characterized by letting go.

In addition, in the autostereoscopic 3D image display device according to an embodiment of the present invention, when d is the optimum viewing distance at which a single view is formed on the viewing diamond, at least in order to extend the viewing distance to 2d, 3d, .... It is characterized in that the number of overlapping viewing diamonds is set to 2 overlaps, 3 overlaps, ... or more.

In this case, the image panel may sequentially assign a first view to an m-th view to m (m is a natural number) sub-pixels to display input data of a multi-view.

The 3D filter may form a viewing diamond in which a first view image to a kth (k is a natural number satisfying 1 ≤ k ≤ m) view image is displayed in the viewing distance by separating the optical axis of the input data.

The 3D filter may include a lenticular lens plate made of a plurality of lenticular lenses.

As the width of the viewing diamond is set to a/n times the distance between both eyes, the optimal viewing distance may be reduced by a/n times.

The autostereoscopic 3D display device according to an embodiment of the present invention may further include a timing controller for newly mapping input data that is the same or similar between adjacent views.

The timing controller may convert input data of a viewing diamond positioned between the left eye and the right eye into a view image identical to or similar to a view image perceived by the left or right eye.

The sub-pixel perceived in the left eye and the sub-pixel perceived in the right eye may be spatially separated by one sub-pixel.

The number of overlaps of the input data may be set equal to or smaller than the number of overlaps of the viewing diamond x (binocular spacing/width of the viewing diamond).

The total number of views may be set equal to or smaller than (N+1) × number of overlapping viewing diamonds × (binocular spacing/width of viewing diamond) (N is a natural number).

The autostereoscopic 3D image display device according to an embodiment of the present invention may further include a viewing distance sensing unit that detects the position of both eyes of a viewer.

In addition, the autostereoscopic 3D image display device according to an embodiment of the present invention compares the position of both eyes of the viewer with position information on preset viewing zones, and the viewing zones in which both eyes of the viewer are located are viewing zones in which normal 3D images are not visible. If determined to be, a viewing distance extension control unit for converting at least a part of the input data of the multi-view into input data of another view may be additionally included.

In this case, the viewing zones include viewing zones located at a first viewing distance from the image panel and viewing zones located at a second viewing distance from the image panel. When the second viewing distance is farther than the first viewing distance, the viewing distance extension control unit converts at least a part of the input data of the multi-view into input data of another view, so that the viewer's position is located along the first viewing distance. In the same way as the view difference, it is possible to control the view difference of the view images seen in the viewing zones located along the second viewing distance.

In this case, the viewing distance extension control unit may convert any one of the viewer's right-eye perception image and left-eye perception image into input data commonly seen in the right-eye perception image and the left-eye perception image.

And, in the first viewing zone located at the second viewing distance, the first view image is shown on the right part of the image recognized as the right eye of the viewer, the second view image is shown on the left part of the image recognized as the right eye, and the second When the second view image is shown in the right part of the image recognized as the viewer's left eye in the second viewing zone located at the viewing distance, and the third view image is shown in the left part of the image recognized as the left eye, the viewing distance extension control unit After changing the third view input data to be supplied to the image panel into the second view input data, the second view input data written in the sub-pixels visible from the left portion of the image recognized as the viewer's right eye in the first viewing zone is converted into the second view input data. It can be converted into first view input data.

As described above, the autostereoscopic 3D image display device according to the present invention increases the width of the viewing diamond by a/n (a, n is a natural number satisfying the condition of a <n) times the width of the viewing diamond without changing the image panel or the 3D filter. It is characterized in that the same or similar input data is newly mapped between adjacent views through a view data rendering process while setting and overlapping the viewing diamonds at the same time. In this case, the reduced viewing distance may be extended by converting at least a part of the input data of the multi-view into input data of another view through optimal viewing distance control.

Accordingly, 3D crosstalk, luminance deviation and image flipping of a 3D image are removed or minimized without increasing cost, and the depth of the 3D image is improved through this, thereby providing an effect of improving the quality of image quality.

1 is a view for explaining the concept of a stereoscopic image display device of a general lenticular lens type.
2 is a view showing a general lenticular lens type 3D image display device and an optical profile as an example.
3 is a block diagram schematically showing the configuration of an autostereoscopic 3D image display device according to the present invention.
4 is a perspective view schematically showing an autostereoscopic 3D image display device according to the present invention.
5 is a view showing an example of an autostereoscopic 3D image display device and an optical profile according to the first embodiment of the present invention.
6 is a view showing an example of an autostereoscopic 3D image display device and an optical profile according to a second embodiment of the present invention.
7 is a view showing an example of a view overlapping structure and an optical profile of an autostereoscopic 3D display device according to a second embodiment of the present invention.
8 is a view showing, for example, another view overlapping structure and a light profile of the autostereoscopic 3D display device according to the second embodiment of the present invention.
9 is a view showing an example of a newly mapped light profile and view data through view data rendering in the view superposition structure of the autostereoscopic 3D display device according to the second embodiment of the present invention shown in FIG. 7.
FIG. 10 is a view showing, for example, an optical profile and view data newly mapped through view data rendering in another view superposition structure of the autostereoscopic 3D display device according to the second embodiment of the present invention shown in FIG. 8 .
11 is a view showing an example of an arrangement of a pixel array and a lenticular lens in which a view-map is written in the autostereoscopic 3D image display device according to the first embodiment of the present invention shown in FIG. 5.
12 is a diagram illustrating input data input to the pixel array shown in FIG. 11 as an example.
13 is a diagram illustrating an example of converting input data through view data rendering.
14A and 14B are diagrams illustrating, for example, sub-pixels and views perceived by the left and right eyes in the autostereoscopic 3D image display device according to the first embodiment of the present invention shown in FIG. 5.
15A and 15B are diagrams illustrating input data perceived by the left and right eyes in the autostereoscopic 3D image display device according to the first embodiment of the present invention shown in FIG. 5 as an example.
16A and 16B are views showing, for example, sub-pixels and input data perceived by both eyes in the autostereoscopic 3D display device according to the first embodiment of the present invention shown in FIG. 5.
FIG. 17 is a view showing, for example, input data input to a pixel array in the autostereoscopic 3D display device according to the second embodiment of the present invention shown in FIG. 7.
18 is a diagram illustrating an example of converting input data through view data rendering.
FIG. 19 is a view showing another example of input data input to a pixel array in the autostereoscopic 3D display device according to the second embodiment of the present invention shown in FIG. 7.
20 is a diagram illustrating another example of converting input data through view data rendering.
21A and 21B are views showing, for example, sub-pixels and views perceived by the left and right eyes in the autostereoscopic 3D image display device according to the second embodiment of the present invention shown in FIG. 7.
22A and 22B are diagrams illustrating input data perceived by the left and right eyes in the autostereoscopic 3D display device according to the second embodiment of the present invention shown in FIG. 7 as an example.
23A and 23B are views showing, for example, sub-pixels and input data perceived by both eyes in the autostereoscopic 3D display device according to the second embodiment of the present invention shown in FIG. 7.
24 is a view showing an example of a view overlapping structure and an optical profile of an autostereoscopic 3D display device according to a third embodiment of the present invention.
25 is a view showing an example of a viewing area of a multi-view image according to a viewer's position in the autostereoscopic 3D image display device according to the third embodiment of the present invention.
FIG. 26 is a view showing an example of a pixel array in which a view-map is written in the autostereoscopic 3D image display device according to the third embodiment of the present invention shown in FIG. 24;
27A and 27B are views showing, for example, sub-pixels and views perceived by the viewer's right eye and left eye at a position P1 of FIG. 25;
FIG. 28 is a diagram illustrating, for example, images perceived by a viewer's right eye and left eye at a position P1 of FIG. 25;
29A and 29B are views showing, for example, sub-pixels and views perceived by the viewer's right eye and left eye at a position P2 of FIG. 25;
FIG. 30 is a diagram illustrating, for example, images perceived by a viewer's right eye and left eye at a position P2 of FIG. 25;
FIG. 31 is a diagram illustrating an example of converting any one of view images viewed by a viewer's right eye and left eye into a commonly recognized view image in a view maintenance method.
FIG. 32 is a diagram illustrating a portion requiring compensation for a view image converted by a first order when a viewer is at a position P2 in the view maintenance method.
33 is a diagram illustrating an example of converting input data through a view holding method.
34 is a diagram showing input data converted through a view holding method and input to a pixel array, for example.
35A and 35B are diagrams illustrating, for example, sub-pixels viewed from the viewer's right eye and left eye when the viewer views the pixel array shown in FIG. 34 from the P2 position.

Hereinafter, preferred embodiments of the autostereoscopic 3D display device according to the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only the present embodiments are intended to complete the disclosure of the present invention, and common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same elements throughout the specification. In the drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity of description.

When an element or layer is another element or referred to as “on” or “on”, it includes not only directly above the other element or layer, but also a case in which another layer or other element is interposed in the middle. do. On the other hand, when a device is referred to as "directly on" or "directly on", it indicates that no other device or layer is interposed therebetween.

The terms "below, beneath", "lower", "above", and "upper", which are spatially relative terms, refer to one element or component as shown in the drawing. It can be used to easily describe the correlation between the and other devices or components. Spatially relative terms should be understood as terms including different directions of the device during use or operation in addition to the directions shown in the drawings. For example, if an element shown in the figure is turned over, an element described as “below” or “beneath” another element may be placed “above” another element. Accordingly, the exemplary term “below” may include both directions below and above.

The terms used in the present specification are for describing exemplary embodiments, and therefore, are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless specifically stated in the phrase. As used in the specification, "comprise" and/or "comprising" refers to the presence of one or more other components, steps, actions and/or elements in which the recited component, step, operation and/or element Or does not preclude additions.

3 is a block diagram schematically showing the configuration of an autostereoscopic 3D image display device according to the present invention.

Referring to FIG. 3, the autostereoscopic 3D image display device according to the present invention includes an image panel 110, an image panel driver 111, 112, a 3D filter 120, a 3D filter driver (not shown), and a timing controller. 113) and the like.

The stereoscopic image display device according to the present invention includes a liquid crystal display (LCD), an organic light emitting diode display (OLED), a field emission display (FED), and a plasma image display device. (Plasma Display Panel; PDP), electroluminescent display (Electroluminescent Display; EL) can be implemented as a flat panel display device. Although the present invention illustrates a case in which the image panel 110 is configured as a liquid crystal display device in the following embodiments, the present invention is not limited thereto.

At this time, a plurality of sub-pixels displaying red, green, and blue are formed on the image panel 110, and these sub-pixels work with the 3D filter 120 to display a stereoscopic image. A left-eye pixel and a right-eye pixel that display an image are divided.

For example, when the image panel 110 is configured as a liquid crystal display device, the present invention provides a liquid crystal mode, that is, a twisted nematic (TN) mode, an in-plane switching (IPS) mode, and a fringe field. It can be applied regardless of the switching (Fringe Field Switching (FFS) mode) and the vertical alignment (Vertical Alignment (VA) mode).

In this case, although not shown, the image panel 110 may be largely composed of a color filter substrate and an array substrate, and a liquid crystal layer formed between the color filter substrate and the array substrate.

The color filter substrate is a color filter composed of a plurality of sub-color filters that implement colors of red, green, and blue, and a black matrix (BM) that divides between the sub-color filters and blocks light passing through the liquid crystal layer, In addition, a transparent common electrode for applying a voltage to the liquid crystal layer may be formed.

The array substrate is arranged vertically and horizontally to define a plurality of pixel regions, a plurality of gate lines (G1, G2, G3,..., Gn), data lines (D1, D2, D3,..., Dm), and gate lines. It is composed of a thin film transistor, which is a switching element formed in an intersection region between (G1, G2, G3,..., Gn) and the data lines D1, D2, D3,..., Dm, and a pixel electrode formed in the pixel region.

The thin film transistor is electrically connected to the gate electrode connected to the gate line (G1, G2, G3,..., Gn), the source electrode connected to the data line (D1, D2, D3,..., Dm) and the pixel electrode. It consists of a drain electrode. In addition, the thin film transistor includes a gate insulating layer for insulating the gate electrode and the source/drain electrode, and an active layer forming a conductive channel between the source electrode and the drain electrode by a gate voltage supplied to the gate electrode.

The upper polarizing plate is attached to the outer surface of the color filter substrate, and the lower polarizing plate is attached to the outer surface of the array substrate. The light transmission axis of the upper polarizing plate and the light transmission axis of the lower polarizing plate may be formed to be orthogonal to each other. In addition, an alignment layer for setting the pre-tilt angle of the liquid crystal layer is formed on the inner surfaces of the color filter substrate and the array substrate, while a cell gap of the liquid crystal cell is formed between the color filter substrate and the array substrate. Spacers for holding are formed.

The image panel 110 configured as described above displays an image under the control of the timing controller 113.

The image panel 110 may display a 2D image in 2D mode and a multi-view image in 3D mode under the control of the timing controller 113.

The view of the 3D image can be generated by separating the cameras by the distance between the viewer's eyes and taking an image of the object. For example, when an object is photographed using nine cameras, the image panel 110 may display a three-dimensional image of nine views.

The image panel driver 111, 112 includes a data driver 111 and an image panel for supplying data voltages of 2D/3D images to the data lines D1, D2, D3,..., Dm of the image panel 110. And a gate driver 112 for sequentially supplying scan pulses (or gate pulses) to the gate lines G1, G2, G3,..., Gn of 110. The image panel drivers 111 and 112 spatially distribute and write left-eye and right-eye image data input as data in a multi-view image data format in the 3D mode in sub-pixels of the image panel 110.

At this time, although not shown, the viewing distance sensing unit connected to the host system 115 detects the distance of the viewer and the position of both eyes of the viewer using a sensor, and converts the result into digital data so that the host system 115 or the timing controller ( 113). As the sensor, an ultraviolet sensor or a high frequency sensor may be applied.

The viewing distance detector may analyze the output of the two sensors by triangulation, calculate the distance between the image panel 110 and the viewer, and transmit the result to the host system 115 or the timing controller 113. The viewing distance detector may analyze the sensor output through a known facial recognition algorithm to detect the position of both eyes of the viewer, and transmit the result to the host system 115 or the timing controller 113.

The timing controller 113 receives timing signals such as a data enable signal (Data Enable, DE) and a dot clock (CLK), and control signals for controlling the operation timing of the gate driver 111 and the data driver 112 (GCS, DCS) is generated.

That is, the timing controller 113 drives the image panel 110 at a predetermined frame frequency based on the image data and timing signals input from the multi-view image conversion unit 114 (or the host system 115), A gate driver control signal GCS and a data driver control signal DCS may be generated based on a predetermined frame frequency. The timing controller 113 supplies the gate driver control signal GCS to the gate driver 111, and supplies image data R, G, and B and the data driver control signal DCS to the data driver 112.

The gate driver control signal GCS for controlling the gate driver 111 includes a gate start pulse, a gate shift clock, and a gate output enable signal. The gate start pulse controls the timing of the first gate pulse. The gate shift clock is a clock signal for shifting the gate start pulse. The gate output enable signal controls the output timing of the gate driver 111.

The data driver control signal (DCS) for controlling the data driver 112 includes a source start pulse, a source sampling clock, a source output enable signal, and a polarity control signal. Includes. The source start pulse controls the data sampling start point of the data driver 112. The source sampling clock is a clock signal that controls the sampling operation of the data driver 112 based on a rising or falling edge. If digital video data to be input to the data driver 112 is transmitted using the mini LVDS (Low Voltage Differential Signaling) interface standard, the source start pulse and the source sampling clock may be omitted. The polarity control signal inverts the polarity of the data voltage output from the data driver 112 in a horizontal period of L (L is a natural number). The source output enable signal controls the output timing of the data driver 112.

The data driver 112 includes a plurality of source drive ICs. The source drive ICs convert image data (R, G, B) input from the timing controller 113 into positive/negative gamma compensation voltages to generate positive/negative analog data voltages. The positive/negative analog data voltages output from the source drive ICs are supplied to the data lines D1, D2, D3,..., Dm of the image panel 110.

The gate driver 111 includes one or more gate drive ICs. The gate driver 111 includes a shift register, a level shifter and an output buffer for converting an output signal of the shift register into a swing width suitable for driving a TFT of a liquid crystal cell. The gate driver 111 sequentially supplies a gate pulse synchronized with the data voltage to the gate lines G1, G2, G3,..., Gn of the image panel 110 under the control of the timing controller 113.

In particular, the timing controller 113 according to the present invention may play a role of newly mapping input data for each sub-pixel of the image panel 110 through a view data rendering process. By newly mapping the same or similar input data between adjacent views, it is possible not only to remove or reduce cognitive 3D crosstalk, but also to expand the viewing angle.

In addition, the timing controller 113 according to the present invention compares the position of both eyes of the viewer with position information on preset viewing zones, and the viewing zones in which both eyes of the viewer are located are viewing zones in which normal 3D images are not visible. It is determined as and may include a viewing distance extension control unit that converts input data of at least some views into input data of another view from the input data of the multi-view.

A multi-view image conversion unit 114 may be installed between the timing controller 113 and the host system 115. The multi-view image conversion unit 114 rearranges the left-eye and right-eye image data of the 3D image input from the host system 115 in the 3D mode in a multi-view image data format and transmits it to the timing controller 113.

That is, when 2D image data is input in the 3D mode, the multi-view image conversion unit 114 generates left-eye and right-eye image data from 2D image data by executing a preset 2D-3D image conversion algorithm, and converts the data into a multi-view image. It is rearranged in a data format and transmitted to the timing controller 113.

The host system 115 may be implemented as any one of a TV (television) system, a set-top box, a navigation system, a DVD player, a Blu-ray player, a personal computer, a home theater system, and a phone system. The host system 115 converts the digital video data of the 2D/3D input image into a format suitable for the resolution of the image panel 110 using a scaler, and converts the timing signal together with the data to the timing controller 113. send.

The host system 115 supplies the 2D image to the timing controller 113 in the 2D mode, while supplying the 3D image or 2D image data to the multi-view image conversion unit 114 in the 3D mode. The host system 115 transmits a mode signal to the timing controller 113 in response to user data input through a user interface (UI) (not shown) to change the autostereoscopic mode of the autostereoscopic display device to the 2D mode. Can be switched in 3D mode. The user interface may be implemented with a keypad, a keyboard, a mouse, an On Screen Display (OSD), a remote controller, a Graphic User Interface (GUI), a touch UI, and the like. The user can select 2D mode and 3D mode through the user interface, and can select 2D-3D image conversion in 3D mode.

That is, the host system 115 supplies image data and timing signals to the multi-view image conversion unit 114 through interfaces such as a Low Voltage Differential Signaling (LVDS) interface and a Transition Minimized Differential Signaling (TMDS) interface. The host system 115 supplies 3D image data including left-eye image data and right-eye image data to the multi-view image conversion unit 114. As described above, the timing signals include a vertical synchronization signal, a horizontal synchronization signal, a data enable signal, and a dot clock.

The host system 115 receives viewer sensing information from the viewing distance sensing unit, and calculates the optimal number of views according to the viewer sensing information. The host system 115 generates a view control signal according to the optimal number of views and supplies it to the multi-view image conversion unit 114. The host system 115 may generate a view control signal using a lookup table that receives the number of viewers of the viewer detection information as an input address and outputs the number of views stored in the corresponding input address.

Next, the 3D filter 120 is a medium for optically separating the path of the image, and includes a light transmission region for transmitting or blocking the left and right eye images output from the left and right eye pixels of the image panel 110. It performs the function of forming a light blocking area.

The 3D filter 120 may be configured in various ways using known techniques such as the following lenticular lenses or barriers. The lenticular lens and the barrier may be implemented as a switchable lens or a switchable barrier that is electrically controlled using a liquid crystal panel. The applicant of the present application has proposed a switchable lens or a switchable barrier through US application 13/077565, US application 13/325272, and Korean application 10-2010-0030531.

The 3D filter driver may shift the switchable lens or the switchable barrier in synchronization with image data written to the pixel array of the image panel 110 in the 3D mode under the control of the timing controller 113.

4 is a perspective view schematically showing an autostereoscopic 3D image display device according to the present invention, and shows an example of a 3D image display device of a lenticular lens type.

Referring to FIG. 4, the lenticular lens type stereoscopic image display device includes a plurality of lenticular lenses having a predetermined width w in front of an image panel 110 on which a plurality of sub-pixels (R, G, B) are arranged. A lenticular lens plate 120 which is a 3D filter including 125 is disposed.

The lenticular lens plate 120 is formed by forming a material layer having a convex lens shape on an upper surface thereof on a flat substrate.

The lenticular lens plate 120 serves to divide the left and right eye images, and the optimal viewing distance d from the lenticular lens plate 120 is a viewing diamond in which images corresponding to the left and right eyes reach each of the left and right eyes normally. (Presentation area) is formed.

Accordingly, the image image transmitted through the image panel 110 passes through the lenticular lens plate 120 so that another image group enters the left and right eyes of the final viewer, so that a three-dimensional image can be felt.

In such a 3D image display device of the lenticular lens type, the image panel 110 and the lenticular lens plate 120 are supported by a device (not shown), so that a predetermined distance between the image panel 110 and the lenticular lens plate 120 ( Rear distance) are separated.

Meanwhile, according to the present invention, the arrangement of a plurality of lenticular lenses 125 is inclined with a first angle θ with respect to the longitudinal direction (y-axis direction) of the sub-pixels R, G, and B. The horizontal width (w) along the transverse direction (x-axis direction) of the sub-pixels (R, G, B) of the lenticular lens 125 is an integer multiple of the sub-pixels (R, G, B). Can be set.

That is, in the stereoscopic image display device according to the present invention, the lenticular lens 125 provided in the lenticular lens plate 120 is inclined at a first angle θ based on the longitudinal direction of the sub-pixels R, G, B. Can be placed.

Accordingly, the number of views for viewing a 3D image can be adjusted by the inclined arrangement of the lenticular lens plate 120 with respect to the image panel 110 displaying a 2D image.

In such a lenticular lens plate 120, a first angle θ inclined with respect to the longitudinal direction of the sub-pixels R, G, B of the lenticular lens 125 is tan ^-1 ((M*Pa)/( N*Pb)).

At this time, Pa is the short axis pitch of the sub-pixels (R, G, B), Pb is the long axis pitch of the sub-pixels (R, G, B), and M and N are random natural numbers, respectively, and the lenticular lens 125 In the horizontal direction of the sub-pixels (R, G, B) in the group when a number of sub-pixels (R, G, B) are set as one group, and one group passes through the vertices in exactly diagonal directions. Is defined as the number of sub-pixels R, G, B and the number of sub-pixels R, G, B in the longitudinal direction of the sub-pixels R, G, B. At this time, it is common for M and N to satisfy a value of M/N ≤ 2.

At this time, the number given to a plurality of sub-pixels (R, G, B) located inside one group is arranged by tilting the lenticular lens 125 of the lenticular lens plate 120 at a first angle (θ). It is the number of views defined as an area in which 3D image viewing is possible in the 3D image display device, and the number assigned to each view is the sub-pixels (R, G, B) displayed when viewing a 3D image in each view area.

The 3D image display device according to the present invention including the lenticular lens plate 120 is effective in terms of improving luminance, and further has an effect of improving the viewing angle for viewing 3D images by increasing the number of views.

Increasing the number of views is a structure in which the lenticular lenses 125 provided in the lenticular lens plate 120 are arranged to have a predetermined angle with respect to the longitudinal directions of the sub-pixels R, G, B, that is, slanted ( slanted) structure is applied. By applying such a slanted structure, it is possible to prevent a decrease in resolution in one direction.

Meanwhile, in the present invention, it is possible to improve the luminance deviation of a stereoscopic image by configuring the viewing diamond to overlap the adjacent viewing diamond, which will be described in detail through the first embodiment of the present invention.

5 is a view showing an autostereoscopic 3D image display device and an optical profile according to the first embodiment of the present invention as an example.

In this case, the center of FIG. 5 shows a viewing area, that is, a viewing diamond forming a viewing zone, and a light profile and view data, and a lower part of FIG. 5 schematically shows a view that is actually perceived in the viewing diamond. For reference, view data is classified using hatching, and the same hatching means the same view data.

Referring to FIG. 5, the autostereoscopic 3D image display device according to the first embodiment of the present invention is a lenticular lens plate as a 3D filter positioned in front of the image panel 110 and the image panel 110 for realization of a 3D image. 120).

At this time, the image panel 110 and the lenticular lens plate 120 are supported by a device (not shown), and the gap between the image panel 110 and the lenticular lens plate 120 is separated by a gap glass 126 (rear surface). Distance; can be spaced apart by S).

The lenticular lens plate 120 may be formed by forming a plurality of lenticular lenses 125 formed of a material layer having a convex lens shape on a flat substrate, but the present invention is limited thereto as described above. no.

In addition to the lenticular lens plate 120, the 3D filter may be configured in various ways using known techniques such as a barrier.

The lenticular lens plate 120 serves to divide the left and right eye images, and the optimal viewing distance d from the lenticular lens plate 120 is a diamond in which images corresponding to the left and right eyes reach each of the left and right eyes normally. A shaped viewing diamond (present region) 130 is formed.

That is, the lenticular lens plate 120 forms a viewing area at the optimal viewing distance d by allowing different image groups to enter the left and right eyes of the final viewer with light emitted from each sub-pixel of the image panel 110. Since this shape is usually in the form of a diamond, it is called a viewing diamond 130.

One width of the viewing diamond 130 is formed in the size of the viewer's binocular spacing (e), in order to recognize as a stereoscopic image by inputting an image having a parallax on the viewer's left and right eyes respectively.

At this time, view data, that is, an image, of a sub-pixel of the image panel 110 corresponding to each viewing diamond 130 is formed.

The view data refers to an image captured by a camera that is separated by a criterion of the binocular spacing (e). For example, in the case of 9 views, images captured by 9 cameras are sequentially applied to the viewing diamond 130 from the first view to the ninth view, and the second view is relatively right compared to the first view. It is located on the left and has directionality. The viewing diamond 130 is repeatedly formed by reflecting the corresponding view data.

At this time, as described above, looking at the optical profile measured at the optimal viewing distance d, it can be seen that the intensity of light is highest at the center of the viewing diamond 130 and decreases toward the end of the viewing diamond 130.

However, in the case of the first embodiment of the present invention, compared to the conventional lenticular lens-type stereoscopic image display device, the luminance deviation (ΔL') is significantly reduced compared to the existing one by configuring the viewing diamond 130 to overlap. I can.

In this case, although the first embodiment of the present invention shown in FIG. 5 is taken as an example of overlapping, the present invention is not limited thereto, and the viewing diamonds 130 may overlap with each other by 3 or more views. Here, the double overlap is a structure in which another viewing diamond 130 is inserted between two adjacent viewing diamonds 130.

At this time, the size and width of the light profile of each view are affected by the image panel 110, lenticular lens plate 120, light source, optical sheet, etc., and the light profile of the view corresponding to the adjacent viewing diamond 130 The size of the overlapped area corresponds to 3D crosstalk (CT).

That is, in the ideal case, only the information of the view is visible on the viewing diamond 130 (for example, only the L-view can be seen in the left eye, and the R-view cannot be seen), but in the case of the view overlapping structure, in the left eye In addition to the L-view, you can see the R-view dimly, resulting in 3D crosstalk (CT).

As described above, in the case of the autostereoscopic 3D image display device according to the first embodiment of the present invention, it can be seen that the luminance deviation is significantly reduced compared to the conventional one, while the 3D crosstalk increases. That is, the luminance deviation and the 3D crosstalk have a trade off relationship with each other.

In addition, as the 3D crosstalk increases, the 3D depth perceived by the viewer also deteriorates, and the image becomes blurry.

In this case, the view data of the adjacent view can be replaced in order to reduce the 3D crosstalk perceived by the viewer, but since the size of the viewing diamond 130, that is, the width is formed at any intervals, it is necessary to replace the view data based on the left eye. In this case, the right eye is affected, and when the view data is replaced based on the right eye, the left eye is affected.

Accordingly, in the second to third embodiments of the present invention, the width of the viewing diamond is set to be smaller than the binocular spacing, such as a/n (a, n is a natural number that satisfies a <n condition) times the binocular spacing. It is configured to overlap diamonds, which will be described in detail with reference to the drawings.

In general, the optimum viewing distance (2.5H ~ 3H; H is the height of the image panel) of the 3D image display device is determined by the size of the image panel of the 3D image display device.

At this time, if the width of the viewing diamond is set smaller than the binocular spacing, such as a/n times the binocular spacing, the generation position of the viewing diamond forming a single view is reduced to a/n times compared to the existing one, so that the optimal viewing distance is closer to the video panel. You lose.

6 is a view showing an autostereoscopic 3D image display device and an optical profile according to a second embodiment of the present invention, for example, showing a case in which the width of the viewing diamond is set to 1/2 times the distance between the eyes. .

7 and 8 are views showing an example of a view overlapping structure and an optical profile of the autostereoscopic 3D display device according to the second embodiment of the present invention shown in FIG. 6.

At this time, FIGS. 7 and 8 each show a two-overlapping structure and a three-overlapping structure as an example.

As described above, a viewing diamond forming a viewing area and a light profile and view data are shown in the center of FIGS. 6, 7 and 8, and the bottom of FIGS. 6, 7 and 8 are actually recognized in the viewing diamond. The view is schematically shown. For reference, view data is classified using hatching, and the same hatching means the same view data.

6, 7 and 8, the autostereoscopic 3D image display device according to the second embodiment of the present invention includes an image panel 210 and a 3D image panel 210 located in front of the image panel 210 for realizing a 3D image. It comprises a lenticular lens plate 220 as a filter.

At this time, the image panel 210 and the lenticular lens plate 220 are supported by a device (not shown), so that a predetermined distance between the image panel 210 and the lenticular lens plate 220 is determined by the thickness of the gap glass 226. It can be separated by (rear distance; S).

The lenticular lens plate 220 may be formed by forming a plurality of lenticular lenses 225 made of a material layer having a convex lens shape on a flat substrate, but the present invention is limited thereto as described above. no.

In addition to the lenticular lens plate 220, the 3D filter may be configured in various ways using known techniques such as a barrier.

The lenticular lens plate 220 serves to divide the left and right eye images, and at the optimal viewing distance (OVD) d/2 from the lenticular lens plate 220, the left and right eyes are divided into left and right eyes, respectively. A diamond-shaped viewing diamond (present region) 230 through which images corresponding to are normally reached is formed.

At this time, the viewing diamond 230 according to the second embodiment of the present invention is characterized in that one width is set to 1/2 times the distance e of both eyes of the viewer. However, the present invention is not limited thereto, and the width of the viewing diamond 230 is equal to a/n (a, n is a natural number satisfying a <n condition) times the binocular spacing (e), and the binocular spacing (e) Any case of setting smaller than is possible.

Through this, it is possible to remove or reduce the 3D crosstalk by reducing the mutual influence of the viewing diamond 230 in which both eyes of the viewer are located.

At this time, in the second embodiment of the present invention, the width of the viewing diamond 230 is not changed without changing the image panel 210 or the 3D filter, that is, the resolution of the image panel 210 or the rear distance of the lenticular lens 225. It is characterized by reducing the binocular distance (e), and as a result, the optimal viewing distance is reduced (d → d/2) compared to the existing one.

At the same time, the second embodiment of the present invention is characterized in that two or three viewing diamonds 230 are superimposed, whereby the luminance deviation (ΔL", ΔL'" due to the movement of the viewer's position). ) Also decreases.

At this time, view data, that is, an image, of a sub-pixel of the image panel 210 corresponding to each viewing diamond 230 is formed.

The view data refers to an image captured by a camera that is separated by a criterion of the binocular spacing (e). For example, in the case of 9 views, images captured by 9 cameras are sequentially applied to the viewing diamond 230 from the first view to the ninth view, and the second view is relatively right compared to the first view. It is located on the left and has directionality. The viewing diamond 230 is repeatedly formed by reflecting the corresponding view data.

At this time, as described above, looking at the optical profile measured at the optimal viewing distance d/2, it can be seen that the intensity of light is highest at the center of the viewing diamond 230 and decreases toward the end of the viewing diamond 230.

As described above, FIGS. 7 and 8 show a two-overlapping structure and a three-overlapping structure in which two and three viewing diamonds 230 are overlapped between adjacent viewing diamonds 230 in FIG. 6. At this time, as the number of overlapping viewing diamonds 230 increases to 2, 3, ..., luminance deviations (ΔL", ΔL'") are significantly reduced compared to the existing ones, while 3D crosstalk is relatively It can be seen that it is increasing.

In addition, as the viewing diamond 230 is set smaller than the binocular spacing e, the viewing angle (or viewing left and right width) is also reduced compared to the first embodiment of the present invention, but a viewing diamond formed between the viewer's left and right eyes ( 230), some of them cannot affect both eyes of the viewer.

Accordingly, when a light source having the same characteristics is used, interference between the viewing diamonds 230 is reduced, and the accumulated 3D crosstalk is relatively reduced compared to the first embodiment of the present invention.

On the other hand, with the above configuration alone, 3D crosstalk cannot be completely removed or reduced to a significant size. Accordingly, input data (or image data; hereinafter, for convenience, input data and image data are mixed and used) through the view data rendering process. It is proposed to newly map each sub-pixel of the image panel, and this will be described in detail with reference to the drawings.

9 is a view showing an example of a newly mapped optical profile and view data through view data rendering in the view superposition structure of the autostereoscopic 3D display device according to the second embodiment of the present invention shown in FIG. 7. .

In addition, FIG. 10 is an example of a newly mapped optical profile and view data through view data rendering in another view overlapping structure of the autostereoscopic 3D display device according to the second embodiment of the present invention shown in FIG. 8. It is a drawing showing.

9 and 10, the configuration of the autostereoscopic 3D display device is the same as described above, but it can be seen that the optical profile and the view data are newly mapped through view data rendering.

That is, FIGS. 9 and 10 show an optical profile, view data, and perceived view shown in the viewing area as input data is newly mapped for each sub-pixel of the image panel 210 through the view data rendering process.

The view data rendering technology is basically a data processing technique for reducing perceived 3D crosstalk due to interference of adjacent viewing diamonds 230, and in the present invention, the width of the viewing diamond 230 is reduced and the viewing diamonds 230 are overlapped with each other. In the state, by newly mapping the same or similar input data between adjacent views, not only the perceived 3D crosstalk is removed or reduced, but also the viewing angle is expanded.

When viewing the view perceived by the viewer, the viewer's left and right eyes are viewing images with different colors, i.e., parallax, and the image naturally changes according to the viewer's movement by the same or intermediate view image located between the view and the view. You can see that it is.

As described above, the view data is classified using hatching, and the same hatching means the same view data. That is, for example, if the left eye is in the first view and the right eye is in the 5th view (in case of overlapping 2) or the 7th view (in case of overlapping 3), the first view is located in the adjacent left and right views of the first view. While the same view data is input, the same view data as the 5th or 7th view is input to the adjacent left and right views of the 5th or 7th view. And, between them, view data of the same or intermediate view image as the first view, the fifth view, or the seventh view is input.

In addition, unlike FIGS. 7 and 8 before applying the view data rendering technology, it can be seen that the viewing angle is also secured by the intermediate view image.

Hereinafter, a method of converting input data (or image data) by applying the above-described view data rendering technique will be described in detail with reference to the drawings.

FIG. 11 is a view showing an example of an arrangement of a pixel array and a lenticular lens in which a view-map is written in the autostereoscopic 3D image display device according to the first embodiment of the present invention shown in FIG. 5. An example of a pixel array in use is shown. However, the present invention is not limited to the number of views described above.

In this case, R, G, and B displayed at the top of FIG. 11 indicate the positions of the R, G, and B sub-pixels.

FIG. 12 is a diagram showing input data input to the pixel array shown in FIG. 11 as an example, and shows input data newly mapped according to the view data rendering technique of the present invention as an example.

13 is a diagram illustrating an example of converting input data through view data rendering.

At this time, 1, 2, 3, ... and 16 shown in FIGS. 12 and 13 denote a first view image, a second view image, a third view image, ... and a 16th view image, respectively.

Referring to FIG. 11, when an m (m is a natural number) view is used, a first view to an m-th view may be sequentially allocated to m sub-pixels in units of m sub-pixels in the image panel.

That is, the k-th view is allocated to the k-th sub-pixel of the m sub-pixels of the image panel (k is a natural number satisfying 1 ≤ k ≤ m).

For example, in the case of using 16 views, a first view (1 ^st view shown in FIG. 13) is assigned to a first sub-pixel, and a second view (2 ^nd view) is assigned to a second sub-pixel, the third sub-allocate the third view (3 ^rd view) to the pixel, the fourth sub-pixel is assigned a fourth view to (4 ^th view). And, the fifth sub-allocate the fifth view (5 ^th view) to the pixel, and the sixth sub-is assigned a sixth view of a pixel (6 ^th view), the seventh sub-seventh view of a pixel (7 ^th view) is assigned to the eighth sub-pixels in view of assigning the eighth (8 ^th view). A ninth sub-is assigned a 10 second view (10 ^th view) to a pixel, an eleventh sub-11th view of the pixel (11 ^th view) 9 second view to a pixel (9 ^th view) is, the tenth sub-assigned Is allocated, and a 12 ^th view is allocated to the twelfth sub-pixel. 13th sub-is assigned a 14 second view (14 ^th view) to the pixel, the 15 sub-15th view of the pixel (15 ^th view) 13 second view to a pixel (13 ^th view) is, 14 sub-assigned the allocation is, 16 sub-views assigned to the 16th to the pixel (16 ^th view).

To this end, the 3D filter may be implemented with a lenticular lens 125 having a slanted structure that is obliquely formed at a predetermined angle compared to the sub-pixels. More specifically, the lenticular lens 125 of the slanted structure is formed obliquely by a predetermined angle with respect to the long axis sides of the sub-pixels.

Accordingly, the 3D filter divides each of the first to m-th view images (view images before transformation) displayed on the m sub-pixels into each of the first to m-th views. Accordingly, the 3D filter outputs the k-th view image displayed on the k-th sub-pixel as the k-th view.

For reference, the view-map described in the present invention refers to coordinate information on a viewing area in which a 3D image output from the 3D image display device according to the present invention can be viewed. There is an area that cannot be viewed.

Here, the presenting region refers to a region in which a viewer can normally view a 3D image, and a right eye image is formed in the right eye of the viewer, and a left eye image is formed in the left eye.

Also, since the difference information of the image is transmitted in the area, the viewer can perceive the image in three dimensions, but the left eye image is formed in the right eye and the right eye image is formed in the left eye. This is the area you will feel.

In addition, the viewable area refers to an area in which viewing of a 3D image is impossible.

That is, the view-map includes coordinate information (ie, the first view to the m-th view) on positions in which the three areas are displayed.

However, since it is possible to determine an area excluding the present area and the still area as an unviewable area, coordinate information for the unviewable area may be omitted in the view-map.

Referring to FIGS. 12 and 13, when the view data rendering technique according to the present invention is applied, input data is newly mapped to the same input data between adjacent views.

For example, if using 16 view, second input data for the second view (the 2 ^nd view shown in Fig. 13) is converted to the first view image in a second view image. In addition, the input data of the third view (3 ^rd view) is converted from the third view image to the second view image, and ^{the input data of the fourth view (4 th} view) is converted from the fourth view image to the second view image. do. The fifth input data of the view (5 ^th view) is converted to the third view image in the fifth view video, 6 input data for the second view (6 ^th view) is converted to the third view images in a sixth view image. 7, the input data for the second view (7 ^th view) the input data is a seventh view image is converted in a fourth view image, the eighth view (8 ^th view) of the is converted into a fourth view image in the eighth view image. 9, input data for the second view (9 ^th view) is converted to a fifth view image in the ninth view image, the input data of the 10th view (10 ^th view) is converted to a fifth view image in a tenth view image. 11, first input data of the view (11 ^th view) is converted to a sixth view image in the 11th view video, 12 the input data for the second view (12 ^th view) is converted to a sixth view image at the 12th view image. 13th view and input data of the (13 ^th view) is converted to a seventh view image in the 13th view video, 14 the input data for the second view (14 ^th view) is converted to a seventh view image at a 14 view imaging. 15, first input data of the view (15 ^th view) is converted to an eighth view image in the 15th view video, 16 the input data for the second view (16 ^th view) is converted to the 8-view image in the 16th view image.

When 16 views are used as described above, since it is a two-overlapping structure of the viewing diamond, the first view image to the 16th view image may be input, but the difference between the images perceived in the monocular can be reduced to reduce the perceived 3D crosstalk. By overlapping the input data by two, only the first to eighth view images can be input.

14A and 14B are views illustrating, for example, sub-pixels and views perceived by the left and right eyes in the autostereoscopic 3D image display device according to the first embodiment of the present invention shown in FIG. 5.

15A and 15B are diagrams illustrating input data recognized by the left and right eyes in the autostereoscopic 3D image display device according to the first embodiment of the present invention shown in FIG. 5 as an example.

In this case, FIGS. 14A and 15A show sub-pixels perceived in the left eye, views, and input data as an example, and FIGS. 14B and 15B illustrate sub-pixels perceived in the right eye, views, and input data, for example. Is showing.

16A and 16B are diagrams illustrating, for example, sub-pixels and input data recognized by both eyes in the autostereoscopic 3D display device according to the first embodiment of the present invention shown in FIG. 5.

In an ideal case where there is no 3D crosstalk between adjacent views, the viewer perceives two views on a monocular basis in two overlapping of viewing diamonds. Accordingly, as shown in FIGS. 14A and 14B, sub-pixels recognized by the left eye and the right eye can be expressed.

In this case, in the autostereoscopic 3D display device according to the first embodiment of the present invention shown in FIG. 5, the width of the viewing diamond is based on the binocular spacing. If there is no overlap of the viewing diamond, the left eye can recognize the first view. In this case, the right eye perceives the second view.

Therefore, in the case of double overlap, as one more viewing diamond exists between the left and right eyes, as shown in Figs. 14A and 14B, when the left eye recognizes the first view, the right eye recognizes the third view (binocular In the case, see Fig. 16a).

In this case, it can be seen that the sub-pixel perceived by the left eye and the sub-pixel perceived by the right eye are adjacent to each other.

In this case, when the view data rendering technology according to the present invention is applied, as shown in FIGS. 15A and 15B in the case of two overlapping, when the left eye views the first view image, the right eye sees the second view image (Fig. 16b).

When this view data rendering technique is applied to the second embodiment of the present invention, it is as follows.

First, a case in which a view data rendering technique is applied in a two-overlapping structure of a viewing diamond will be described. Hereinafter, a case in which 16 views are used will be described, but as described above, the present invention is not limited to the number of views.

17 is a view showing, for example, input data input to a pixel array in the autostereoscopic 3D display device according to the second embodiment of the present invention shown in FIG. 7 according to the view data rendering technology of the present invention. The newly mapped input data is shown as an example.

18 is a diagram illustrating an example of converting input data through view data rendering.

19 is a view showing another example of input data input to a pixel array in the autostereoscopic 3D image display device according to the second embodiment of the present invention shown in FIG. 7. In this case, compared to FIG. 17, FIG. 19 shows, for example, input data mapped so that an intermediate view image is inserted between view images.

20 is a diagram illustrating another example of converting input data through view data rendering.

At this time, 1, 2, 3, ... and 16 shown in FIGS. 17 to 20 denote a first view image, a second view image, a third view image, ... and a 16th view image, respectively. In addition, 1.5, 2.5, and 3.5 shown in FIGS. 19 and 20 are an intermediate view image of a first view image and a second view image, an intermediate view image of a second view image and a third view image, and a third view image, respectively. Represents an intermediate view image of the fourth view image.

As described above, the k-th view may be allocated to the k-th sub-pixel (k is a natural number satisfying 1≦k≦m) among m sub-pixels of the image panel.

In addition, the 3D filter divides each of the first to m-th view images (view images before transformation) displayed on the m sub-pixels into each of the first to m-th views. Accordingly, the 3D filter outputs the k-th view image displayed on the k-th sub-pixel as the k-th view.

Referring to FIGS. 17 and 18 and 19 and 20, when the view data rendering technology according to the present invention is applied, the input data is the same or similar (in the case of FIGS. 19 and 20) between adjacent views. Is newly mapped.

For example, when 16 views are used, in the case of FIGS. 17 and 18, input of a second view (2 ^nd view shown in FIG. 18), a third view (3 ^rd view), and a fourth view (4 ^th view) Data is converted from a second view image, a third view image, and a fourth view image into a first view image, respectively. Then, the fifth view (5 ^th view), six second view (6 ^th view), 7 second view (7 ^th view) and eighth view respectively of input data (8 ^th view) is a fifth view image, and the sixth view The image, the seventh view image, and the eighth view image are converted into a second view image. 9th view (9 ^th view), 10 second view (10 ^th view), 11 second view (11 ^th view) and 12th view respectively of input data (12 ^th view) a ninth view image, a tenth view image, The 11th view image and the 12th view image are converted into a third view image. 13th view (13 ^th view), 14 second view (14 ^th view), 15 second view (15 ^th view) and 16th view respectively of input data (16 ^th view) of claim 13, the view image, the 14 view image, The 15th view image and the 16th view image are converted into a fourth view image.

Further, Fig. 19 and (a 2 ^nd view shown in Fig. 20) Figure 20 is a second view for and the third view (3 ^rd view) the input data is the second view image and the first view image in a three-view image of the while the transformation, the input data in the fourth view (4 ^th view) will be converted into the middle view images of the view image of 1.5 in the first view image and a second view image in a fourth image view. Then, the fifth view (5 ^th view), six second view (6 ^th view) and seventh view (7 ^th view) input data, each fifth view image of the sixth view image and a second 7 On the View Image while the conversion to view images, the input data in view of the eighth (8 ^th view) is converted into the intermediate image view of the view image of 2.5 in the eighth view image. 9th view (9 ^th view), 10 second view (10 ^th view) and 11th view the respective input data of (11 ^th view) 9 view image, a tenth view image and the third-view image in the 11 view image while the transformation, the input data in view of the twelfth (12 ^th view) is converted into the intermediate image of the view 3.5 view image in the 12th image view. In the case of inserting an intermediate view image between view images as described above, there is an advantage in that the image can be more effectively and naturally changed according to the movement of the viewer.

However, the 13th view (13 ^th view), 14 second view (14 ^th view), 15 second view (15 ^th view) and 16, input data for the second view (16 ^th view) is each of the 13 views the image, the 14 views The image, the 15th view image, and the 16th view image are converted into a fourth view image. That is, in this case, the fifth view, since there is no image input data of the 16th view (16 ^th view) is not converted to an intermediate view image of the fourth view image and a fifth view video last view image of the fourth view image Will be converted.

When 16 views are used as described above, since it is a two-overlapping structure of the viewing diamond, the first view image to the 16th view image may be input, but the difference between the images perceived in the monocular can be reduced to reduce the perceived 3D crosstalk. By overlapping the input data by four, only the first to fourth view images can be input.

This is one of the characteristics of the present invention. In the existing structure, the number of overlapping viewing diamonds and the number of input data were the same, but in the present invention, the number of overlapping input data may have the following relational expression.

Number of overlapping input data ≤ Number of overlapping viewing diamonds (D) × (Binocular spacing/D width)

If the number of overlaps of the input data is less than the number of overlaps of D × (binocular spacing/width of D), as shown in Figs. According to this, a more natural image change can be induced by adding a portion in which the view image changes by 0.5 view units instead of 1 view unit. The number of such intermediate view images can be adjusted.

21A and 21B are diagrams illustrating, for example, sub-pixels and views perceived by the left and right eyes in the autostereoscopic 3D image display device according to the second embodiment of the present invention shown in FIG. 7.

In addition, FIGS. 22A and 22B are diagrams illustrating input data recognized by the left and right eyes in the autostereoscopic 3D image display device according to the second embodiment of the present invention shown in FIG. 7 as an example.

At this time, FIGS. 21A and 22A show sub-pixels perceived in the left eye, views, and input data as an example, and FIGS. 21B and 22B illustrate sub-pixels perceived in the right eye, views, and input data, for example. Is showing.

23A and 23B are views illustrating, for example, sub-pixels and input data recognized by both eyes in the autostereoscopic 3D display device according to the second embodiment of the present invention shown in FIG. 7.

21A and 21B, the autostereoscopic 3D image display device according to the second embodiment of the present invention illustrated in FIG. 7 has a two-overlapping structure while the width of the viewing diamond is 1/2 times the distance between the eyes. Two views are recognized at the same time on a monocular basis.

However, as the width of the viewing diamond is reduced to 1/2 of the distance between the eyes and at the same time, as it has a two-overlapping structure, three more viewing diamonds exist between the left and right eyes (see FIG. 9), and as an example, the left eye is the first view. When recognizing is, the right eye perceives the fifth view spaced apart by the distance between the eyes (see FIG. 23A for both eyes).

In this case, when the view data rendering technology according to the present invention is applied, as shown in FIGS. 22A and 22B in the case of two overlapping, when the left eye views the first view image, the right eye sees the second view image by a distance between the eyes ( For both eyes, see Fig. 23B).

In this case, unlike the first embodiment of the present invention described above, it can be seen that the sub-pixel perceived by the left eye and the sub-pixel perceived by the right eye are spatially separated by one sub-pixel. That is, the view-map according to the second embodiment of the present invention (and the third embodiment to be described later) is less affected by optical interference between sub-pixels matching the left eye and the right eye compared to the existing structure. It is possible to eliminate or reduce 3D crosstalk.

Accordingly, as the viewing diamond is set smaller than the binocular spacing, the number of viewing diamonds located between the binoculars increases, and as a result, the spacing between the sub-pixels perceived by the left and right eyes increases physically, thereby reducing 3D crosstalk. In addition, the blurred portion of the perceived image is removed accordingly, and the 3D depth perceived by the viewer is also improved.

As described above, in the present invention, it is possible to additionally reduce the 3D crosstalk perceived by the viewer in the viewing area and at the same time secure the viewing angle. Image flipping can also be greatly reduced. That is, the number of view images that are inputted overall is reduced compared to the existing image, and the image flipping phenomenon is also reduced.

This view data rendering technique can be applied regardless of the number of overlapping views.

Meanwhile, the basic view structure described above is set in consideration of all of the resolution, the number of overlaps, and the viewing angle of the image panel.

In the present invention, the viewing diamond structure has the shape of the view structure specified as in the above-described embodiments, and its characteristics are as follows.

Total number of views ≤ (N+1) × number of overlapping viewing diamonds (D) × (Binocular spacing/D width)

Here, N is a natural number, and the portion of N+1 is necessary because the minimum value that can display a view image having a parallax between the left and right eyes is 2.

Accordingly, in addition to the above-described embodiments, various types of view-map structures may be formed by reflecting the contents of the present invention, and accordingly, an appropriate view data rendering technique may be applied.

Meanwhile, as described above, in the case of the second embodiment of the present invention, the optimal viewing distance from the video panel to the viewer is reduced (d → d/2) compared to the existing one.

This is because if the width of the viewing diamond is set smaller than the binocular spacing, such as a/n times the binocular spacing, the generation position of the viewing diamond forming a single view is reduced to a/n times compared to the previous one, and accordingly, the optimal viewing distance is reduced. It gets closer to the image panel.

Even if the optimal viewing distance is reduced compared to the previous one, the effect is the same, so I would like to propose a plan to expand the viewing distance as follows.

General methods of extending the viewing distance include a method of increasing the rear distance between an image panel and a 3D filter, and a method of changing the pitch of a lenticular lens.

In the latter case, it is directly related to the dot pitch, that is, the resolution, of the image panel, and the two methods can be appropriately used according to the size and characteristics of the image panel, but there is a disadvantage in that the cost is basically increased.

Accordingly, in the third embodiment of the present invention, a method capable of controlling an optimal viewing distance without an increase in cost is proposed.

FIG. 24 is a view showing, for example, a view overlapping structure and a light profile of an autostereoscopic 3D display device according to a third embodiment of the present invention. Is showing.

In this case, FIG. 24 is an example of an optical profile and view data when viewing distance is extended in the two-overlapping structure of the autostereoscopic 3D image display device according to the second embodiment of the present invention shown in FIG. 9 described above. Is showing. Here, the expansion of the viewing distance means that the viewer has moved from the position d/2 to the position d from the video panel.

The center of FIG. 24 shows a viewing diamond forming a viewing area at viewing distances d/2 and d, and a light profile and view data at an extended viewing distance d, and a view actually perceived in the viewing diamond at the bottom of FIG. 24 Schematically shows. For reference, view data is classified using hatching, and the same hatching means the same view data.

Referring to FIG. 24, an autostereoscopic 3D image display device according to a third embodiment of the present invention includes an image panel 310 and a 3D filter positioned in front of the image panel 310 for realization of a 3D image. 320).

At this time, the image panel 310 and the lenticular lens plate 320 are supported by a device (not shown), so that a predetermined distance between the image panel 310 and the lenticular lens plate 320 is determined by the thickness of the gap glass 326. It can be separated by (rear distance; S).

The lenticular lens plate 320 may be formed by forming a plurality of lenticular lenses 325 formed of a material layer having a convex lens shape on a flat substrate, but the present invention is limited thereto as described above. no.

In addition to the lenticular lens plate 320, the 3D filter may be configured in various ways using known techniques such as a barrier.

The lenticular lens plate 320 serves to divide the left and right eye images, and images corresponding to the left and right eyes normally reach the left and right eyes at the optimal viewing distance d/2 from the lenticular lens plate 320. A diamond-shaped viewing diamond (present region) 330 is formed.

In this case, as the width of the viewing diamond 330 is reduced by 1/2 times the binocular spacing (e) without changing the image panel 310 or the 3D filter, the optimum viewing distance is formed at the point d/2.

Accordingly, in the case of the third embodiment of the present invention, the viewing distance is extended from the point d/2, which is the optimum viewing distance, to the point d, whereby several optical profiles and views are overlapped. That is, as the viewing distance doubles, the width of the viewing diamond 330 ′ doubles again, and the optical profile widens in proportion to the viewing distance.

In addition, as the input data is newly mapped for each sub-pixel of the image panel 310 through the above-described view data rendering process, the light profile, view data, and perceived view shown in the viewing area d are changed.

For example, if the left eye is in the first view and the right eye is in the 5th view (in the case of overlapping), the same view data as the first view is input to the adjacent left and right views of the first view, while the fifth The same view data as the fifth view is input to the adjacent left and right views of the view. And, between them, view data of the same or intermediate view image as the first view or the fifth view is input. However, this is only an example, and the number of overlapping light profiles and views varies according to the size of the image panel 310.

On the other hand, if the viewing distance is different, the position of the binoculars formed on the viewing diamond 330 ′ differs from the binocular spacing, and data processing in consideration of the viewing distance is required as several views overlap. The applicant of the present application has proposed an optimal viewing distance control method through Korean application 10-2012-0108794.

At this time, in the present invention, when d is the optimal viewing distance in which a single view is formed on the viewing diamond 330 ′ in expanding the viewing distance in the present invention, at least viewing diamonds are at least in order to extend viewing distances to 2d, 3d, .... It is characterized in that the number of overlaps of (330') is designed to be 2 overlaps, 3 overlaps, .... or more. This is because, when the viewing distance is expanded or reduced than the optimal viewing distance, the 2D area and the still area increase, and the present area decreases. When the view data is converted and mapped based on the viewer's single eye (left or right eye), the corresponding 2D area and the still area are also converted with the opposite side (right or left eye) view data, so the 2D area and the still area cannot be controlled. By overlapping the viewing diamonds 330', the 2D region and the overlying region can be converted into a present region by transforming and mapping the view data of the 2D region and the surrounding sub-pixels of the sub-pixels perceived as the still region.

25 is a diagram illustrating a viewing area of a multi-view image according to a viewer's position in an autostereoscopic 3D image display device according to a third embodiment of the present invention, for example.

In this case, it is assumed that the point d/2 corresponds to the optimum viewing distance at which the viewer can normally enjoy a 3D image. This is the case when the viewing diamond width is set to a/n times the binocular spacing (a, n is a natural number that satisfies a <n condition) and overlapping the viewing diamond as described above without changing the image panel or 3D filter. do. However, in the following, for convenience of description, overlapping of viewing diamonds is not considered.

In addition, although FIG. 25 illustrates a multi-view image system displaying 4-view image data, the present invention is not limited thereto.

In FIG. 25, a rhombic area means a viewing zone. "1" is a viewing zone in which a first view image displayed on the image panel 310 is visible, and "2" is a viewing zone in which a second view image displayed on the image panel 310 is visible. "3" is a viewing zone in which a third view image displayed on the image panel 310 is visible, and "4" is a viewing zone in which a fourth view image displayed on the image panel 310 is visible.

"1, 2" is a viewing zone in which a first view image and a second view image are viewed together, and "2, 3" is a viewing zone in which a second view image and a third view image are viewed together. "3, 4" is a viewing zone in which a third view image and a fourth view image are viewed together, and "4, 1" is a viewing zone in which a fourth view image and a first view image are viewed together. That is, "1, 2", "2, 3", "3, 4" and "4, 1" are rear viewing zones located behind the optimal viewing distance d/2 (P1 position) (P2 position).

Hereinafter, the viewing zones and viewing diamonds formed at the P2 position immediately after the optimal viewing distance will be described, but this is for convenience of explanation and can be applied equally to the point d and other points that are twice the optimal viewing distance.

The first to fourth view images are image data captured by four cameras spaced apart from each other by a binocular distance. Accordingly, the first view image and the second view image have binocular parallax when looking at the same object through two cameras spaced apart by a binocular distance. The second view image and the third view image have binocular parallax when looking at the same object through two cameras spaced apart by a binocular distance.

The location, size, and shape of the viewing zones as shown in FIG. 25 may be previously stored in the memory of the timing controller and/or the lookup table in the host system. The host system or timing controller determines which viewing zone the viewer's right eye (RE) and left eye (LE) are located in by comparing the viewer's position detected by the viewing distance sensing unit with the viewing zone position information of the lookup table. It is possible to determine the moving direction and moving distance of In addition, the host system or the timing controller controls the video panel driving circuit to convert at least some of the video data from the multi-view video data (or input data) into video data of another view according to the change of the viewer’s position It can act as an extended control unit.

In the case of a conventional autostereoscopic 3D image display device, the rear viewing zones are viewing zones in which a viewer cannot view a normal 3D image due to 3D crosstalk because several view images are visible to the viewer's single eye. In contrast, the autostereoscopic 3D image display device of the present invention detects the position of the viewing zone in which the viewer is located, and selectively converts the image data of the multi-view according to the detected position of the viewer, so that the viewer can obtain a normal stereoscopic image at any position. To be able to appreciate.

25 is a diagram illustrating an example of viewing zones in which the viewer's left and right eyes are located when the viewer is in the P1 position and the P2 position. In FIG. 25, "1 (RE1)" is a first viewing zone in which only a first view image is viewed at an optimal viewing distance located on the line P1, and the viewer's right eye RE1 is located in the first viewing zone. "2(LE1)" is a second viewing zone in which only a second view image is viewed at an optimal viewing distance located on the line P1, and the viewer's left eye LE1 is located in the second viewing zone. "1, 2 (RE2)" is the first rear viewing zone located along the P2 line, and the first and second view images are shown together, and the viewer's right eye (RE2) is located in the first rear viewing zone. do. "2, 3 (LE2)" is the second rear viewing zone located along the P2 line, and the second and third view images are shown together, and the viewer's left eye (LE2) is located in the second rear viewing zone. do.

FIG. 26 is a view showing, for example, a pixel array in which a view-map is written in the autostereoscopic 3D display device according to the third embodiment of the present invention shown in FIG. 24. The array is shown as an example. However, as described above, the present invention is not limited to the number of views.

In this case, R, G, and B displayed at the top of FIG. 26 indicate positions of R, G, and B sub-pixels.

1, 2, 3, and 4 shown in FIG. 26 represent a first view image, a second view image, a third view image, and a fourth view image, respectively.

Referring to FIG. 26, when an m (m is a natural number) view is used, a first view to an m-th view may be sequentially allocated to m sub-pixels in units of m sub-pixels in the image panel.

To this end, the 3D filter may be implemented as a lenticular lens having a slanted structure formed obliquely at a predetermined angle compared to sub-pixels. More specifically, the lenticular lens of the slanted structure is formed obliquely by a predetermined angle with respect to the long axis sides of the sub-pixels.

Accordingly, the 3D filter divides each of the first to m-th view images (view images before transformation) displayed on the m sub-pixels into each of the first to m-th views. Accordingly, the 3D filter outputs the k-th view image displayed on the k-th sub-pixel as the k-th view.

27A and 27B are views illustrating, for example, sub-pixels and views perceived by the viewer's right eye and left eye at a position P1 of FIG. 25.

That is, FIGS. 27A and 27B show sub-pixels perceived as the viewer's right eye and sub-pixels perceived as the viewer's left eye, respectively, when the viewer's right and left eyes are located in the first viewing zone and the second viewing zone in FIG. 25. -There are showing the pixels.

In addition, FIG. 28 is a diagram illustrating, for example, images perceived by the viewer's right eye and left eye at a position P1 of FIG. 25. That is, FIG. 28 shows an image perceived by the viewer's right eye and an image perceived by the viewer's left eye, respectively, when the viewer's right eye and the left eye are positioned in the first viewing zone and the second viewing zone in FIG. 25.

27A, 27B, and 28, the viewer is in the P1 position, and the viewer's right eye (RE1) and left eye (LE1) are in a first viewing zone (1 (RE1)) and a second viewing zone (2 (LE1)). ), the viewer's right eye RE1 sees only sub-pixels displaying the first view image 1 and the viewer's left eye LE1 sees only sub-pixels displaying the second view image 2.

Therefore, if the viewer's right eye (RE1) and left eye (LE1) are located in the first viewing zone (1 (RE1)) and the second viewing zone (2 (LE1)) at the P1 position, the viewer is normal without 3D crosstalk. You can enjoy 3D images.

29A and 29B are diagrams illustrating, for example, sub-pixels and views perceived by the viewer's right and left eyes at a position P2 of FIG. 25.

That is, FIGS. 29A and 29B show sub-pixels perceived as the viewer's right eye and the viewer's left eye when the viewer's right and left eyes are located in the first rear viewing zone and the second rear viewing zone in FIG. 25. Is showing sub-pixels.

In addition, FIG. 30 is a diagram illustrating, for example, images perceived by the viewer's right eye and left eye at a position P2 of FIG. 25. That is, FIG. 30 shows an image perceived by the viewer's right eye and an image perceived by the viewer's left eye when the viewer's right and left eyes are located in the first rear viewing zone and the second rear viewing zone in FIG. 25. .

29A, 29B, and 30, the viewer is in the P2 position, and the viewer's right eye (RE2) and left eye (LE2) are the first rear viewing zones 1 and 2 (RE2) and the second rear viewing zone ( 2, 3 (LE2)), the viewer's right eye RE1 sees the sub-pixels displaying the first view image 1 and the sub-pixels displaying the second view image 2 together, The viewer's left eye LE1 sees the sub-pixels displaying the second view image 2 and the sub-pixels displaying the third view image 3 together.

This is because the viewing distance of each of the first rear viewing zone (1, 2 (RE2)) and the second rear viewing zone (2, 3 (LE2)) is larger than that of the viewing zones at the P1 position, so that the size is larger and the size of the two views This is because the optical path of the image overlaps and passes through. Therefore, when the viewer's right eye (RE2) and left eye (LE2) are located in the first rear viewing zone (1, 2 (RE2)) and the second rear viewing zone (2, 3 (LE2)) at the P2 position, the viewer is 3D You will feel crosstalk.

At this time, the distance between the centers of the first rear viewing zones 1 and 2 (RE2) and the second rear viewing zones 2 and 3 (LE2) is the first viewing zone 1 (RE1) and the second viewing zone ( 2(LE1)) is larger than the distance between the centers. Therefore, if the viewer's right eye RE1 is located at the center of the first rear viewing zones 1 and 2 (RE2) as shown in FIG. 25, from the center of the second rear viewing zones 2 and 3 (LE2) to the right The viewer's left eye (LE2) is located in a skewed position. In this case, the viewer's right eye RE2 at the position P2 sees the first view image 1 and the second view image 2 in half as shown in FIG. 30. In contrast, the viewer's left eye LE2 sees more sub-pixels displaying the second view image 2 than the sub-pixels displaying the third view image 3.

Accordingly, in the autostereoscopic 3D display device of the present invention, in FIG. 25, when the viewer moves from the position P1 to the position P2 or from the position P1 to a position ahead of it, part of the image data written in the pixel array of the image panel Is converted into image data of another view. As a result, even if the viewer moves the image panel back and forth (including the case of extending the viewing distance according to the third embodiment of the present invention) when viewing a stereoscopic image with an autostereoscopic 3D image display device, the stereoscopic image is normally without 3D crosstalk. You can appreciate.

At this time, the optimal viewing distance control method in the autostereoscopic 3D image display device of the present invention is a method of expanding the difference between views recognized as both eyes of the viewer (hereinafter referred to as "view expansion method") and recognition as both eyes of the viewer. It is divided into a method of maintaining the difference between the views (hereinafter referred to as "view maintenance method").

In the former view expansion method, part of the image data written on the image panel is converted to the image of another view so that the view difference between the view images viewed by both eyes is greater when the viewer moves to P2 than the view images viewed from both eyes of the viewer at the position P1. This is how to convert it to data. In the example of FIG. 25, when a viewer moves to P2, a part of the image data is converted into image data of another view so that only the first view image is visible to the right eye (RE2) and only the third view image is visible to the left eye (LE2). do.

In the view expansion method, when the viewer's position moves away from P1 to P2, the sense of depth of the stereoscopic image perceived by the viewer may be changed, and as shown in FIGS. 31 and 32 to be described later, the compensation regions in which sub-pixels are converted are overlapped. 3D crosstalk can be perceived in the part. In the view expansion method, the size of an area in which 3D crosstalk can occur is significantly smaller than that of the prior art.

The latter view maintenance method is a method of converting part of the image data written in the image panel into image data of another view so that the difference between the binocular views when the viewer watches from the position P1 is maintained when the viewer moves to P2. In the view maintaining method, in the example of FIG. 25, part of the image data is converted into image data of another view so that only the first view image is visible through the right eye RE2 and only the second view image is visible through the left eye LE2.

The view maintenance method can maintain the same sense of depth of a 3D image perceived by the viewer regardless of the position of the viewer, and realize a 3D image without 3D crosstalk.

Hereinafter, a method of maintaining a view among the optimal viewing distance control method of the present invention will be described in detail with reference to the drawings.

FIG. 31 is a diagram illustrating an example of converting any one of view images viewed through the viewer's right eye and left eye into a commonly recognized view image in the view maintenance method.

In addition, FIG. 32 is a diagram illustrating a portion in which compensation is required for a first converted view image when the viewer is at the P2 position in the view maintenance method.

FIG. 33 is a diagram showing an example of converting input data through a view maintaining method. FIG. 33 is a view showing an image converted through an image conversion process of the view maintaining method as shown in FIGS. 31 and 32 and a viewer's perceived image.

34 is a diagram illustrating input data converted through a view holding method and input to a pixel array, for example.

35A and 35B are diagrams illustrating, for example, sub-pixels viewed by the viewer's right eye and left eye when the viewer views the pixel array illustrated in FIG. 34 from the position P2.

As shown in Fig. 30, when two view images adjacent to each of the viewer's right and left eyes are recognized together, one of the cognitive image viewed as the right eye and the cognitive image viewed as the left eye is commonly recognized as the right eye and the left eye. Converted into image data and supplied to the image panel. For example, an image commonly recognized in the right-eye (RE2) recognition image and the left-eye (LE2) recognition image as shown in FIG. 30 is the second view image (2).

In order to convert the left eye (LE2) recognition image of FIG. 30 to the second recognition image (2), the view maintenance method first converts the third view image (3) to a second view recognition image (2') as shown in FIG. Thus, the image data is first transformed.

When the viewer looks at the image panel on which the first transformed image is displayed as shown in FIG. 30 from the position P2, the right eye (RE2) recognition image is the first view image (1) and the second view image ( 2) is a half-view image, and the left eye (LE2) recognition image is the second view recognition image (2, 2').

In the view maintenance method, in order to maintain the difference in view between the image recognized by the user at the position P1 and the image recognized at the position P2, the second view image (2) shown in the right half of the right eye recognition image is provided as shown in the figure on the right of FIG. 1 It is necessary to convert it to video (1). To this end, the view maintenance method converts the second view image 2 data displayed on the right half of the image panel into the first image 1 data as shown in FIGS. 33 and 34. As a result, a viewer can enjoy a 3D image without a difference in view and without 3D crosstalk at positions P1 and P2 as shown in FIGS. 27A and 27B and 34, and 35A and 35B.

The view maintenance method is to convert the first view image (1) into a second view recognition image (2') in the first conversion process, and then divide the viewer's right eye (RE2) and the left eye (LE2) into a second view image (2). And the image data may be converted so that the third view image 3 can be viewed. This method can show a 3D image to the viewer without a difference in view even when the viewer moves from side to side.

As described above, the optimal viewing distance control method of the present invention determines in which viewing zone the positions of the viewer's right and left eyes are located, and when the viewer's position changes, some image data in the multi-view image is converted to image data in another view. Convert to As a result, the optimal viewing distance control method of the present invention can extend the optimal viewing distance of an autostereoscopic 3D image display device in which the viewer can normally enjoy a 3D image no matter where the viewer is located.

As described above, when the viewer is located in the rear viewing zones at the P2 position, the size of the rear viewing zones is large, so that the ratio of the view images viewed with the right eye RE2 and the ratio of the view images viewed with the left eye LE2 are different. In order to accurately process the data required for the optimal viewing distance extension, it is necessary to coordinate and rationalize the positions of viewing zones located on the extended optimal viewing distance line.

To determine the location of the viewing zone in which the viewer's left and right eyes are located, as described above, the viewer's binocular position information (coordinate value) detected by the viewing distance sensing unit is compared with the viewing zone position information (coordinate information) stored in the lookup table. It can be judged by the method. When the viewing zone in which both eyes of the viewer are located is determined in this way, the position of the right or left eye in the viewing zones in which both eyes of the viewer are located and the ratio of the left and right images shown in the viewing zones should be grasped. For a detailed description of this, refer to the previously filed Korean application 10-2012-0108794.

Although many items are specifically described in the above description, this should be construed as an example of a preferred embodiment rather than limiting the scope of the invention. Therefore, the invention should not be determined by the described embodiments, but should be determined by the claims and equivalents to the claims.

110,210,310: image panel 120,220,320: lenticular lens plate
125,225,325: lenticular lens 126,226,326: gap glass
130,230,230',230",330,330': Viewing Diamond

Claims (12)

an image panel that sequentially assigns a first view to an m-th view to m (m is a natural number) sub-pixels to display input data of a multi-view;
A viewing diamond disposed on the front of the image panel and displaying a first view image to a kth (k is a natural number satisfying 1 ≤ k ≤ m) view image in the viewing distance by separating the optical axis of the input data. ) To form a 3D filter; And
It includes a gap glass to maintain a gap between the image panel and the 3D filter,
While setting the width of the viewing diamond to a/n (a, n is a natural number that satisfies a <n condition) times the distance between the eyes and overlapping the viewing diamonds with each other,
Assuming that the viewing distance at which a single view is formed on the viewing diamond is d, the minimum number of overlapping viewing diamonds is 2 overlaps, 3 overlaps, .... or more in order to extend the viewing distance to 2d, 3d, .... Is set to,
An autostereoscopic 3D image display device, characterized in that the viewing distance is reduced by a/n times as the width of the viewing diamond is set to a/n times the distance between both eyes. delete The method of claim 1, further comprising a timing controller for newly mapping the same or similar input data between adjacent views, wherein the timing controller converts input data of a viewing diamond positioned between the left eye and the right eye into the left eye. An autostereoscopic 3D image display device, characterized in that converting a view image identical to or similar to a view image perceived by the right eye. The autostereoscopic 3D image display apparatus of claim 1, wherein the sub-pixel perceived by the left eye and the sub-pixel perceived by the right eye are spatially separated by one sub-pixel. The autostereoscopic 3D image display device according to claim 1, wherein the number of overlaps of the input data is set equal to or smaller than the number of overlaps of viewing diamonds x (binocular spacing/width of viewing diamonds). The method of claim 5, wherein when the number of overlaps of the input data is less than the number of overlaps of the viewing diamond × (binocular spacing/viewing diamond width), input data of an intermediate view is input between the view image and the view image to An autostereoscopic 3D image display device, characterized in that a portion in which the view image changes by 0.5 view units instead of 1 view units according to movement is added. The autostereoscopic 3D according to claim 1, wherein the total number of views is set equal to or smaller than (N+1) x the number of overlapping viewing diamonds x (binocular spacing/width of viewing diamond) (N is a natural number). Video display device. The autostereoscopic 3D image display device according to claim 1, further comprising a viewing distance sensing unit that detects the position of both eyes of the viewer. The multi-view input of claim 8, wherein when the viewing zones in which both eyes of the viewer are located are determined as viewing zones in which a normal stereoscopic image is not visible by comparing the position of both eyes of the viewer with position information on preset viewing zones, the multi-view input An autostereoscopic 3D image display device, further comprising a viewing distance extension control unit for converting at least part of the data into input data of another view. The method of claim 9, wherein the viewing zones
Viewing zones located at a first viewing distance from the image panel; And
And viewing zones located at a second viewing distance from the video panel,
The second viewing distance is farther than the first viewing distance,
The viewing distance extension control unit
At least a portion of the multi-view input data is converted into input data of another view, so that the viewer's position is located along the second viewing distance equal to the view difference of the viewing zones located along the first viewing distance. An autostereoscopic 3D image display device, characterized in that controlling a difference in view of view images seen in viewing zones. The method of claim 10, wherein the viewing distance expansion control unit
And converting one of the viewer's right-eye perception image and left-eye perception image into input data commonly seen in the right-eye perception image and the left-eye perception image. The method of claim 11, wherein a first view image is shown on a right part of an image recognized as the right eye of the viewer in a first viewing zone located at the second viewing distance, and a second view image is shown on a left part of the image recognized as the right eye. The view image is visible, and the second view image is shown on the right side of the image recognized as the viewer's left eye in the second viewing zone located at the second viewing distance, and the third view is on the left side of the image recognized as the left eye. When you see the video,
The viewing distance extension control unit
After changing the third view input data to be supplied to the image panel into second view input data, the second is written in sub-pixels visible in the left portion of the image recognized as the viewer's right eye in the first viewing zone. An autostereoscopic 3D display device, characterized in that converting view input data into first view input data.

Images