JP2007078923A - Display controller, and display device and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To drastically reduce cross-talk between images in a display device by which different images are made visible respectively from different directions on a common display screen. <P>SOLUTION: In the display device for displaying a first image IM1 and a second image IM2 so that they are made visible from different directions respectively on a common display section 100, a display control section 10 alternately outputs image signals DT1 and DT2 of the first and the second images to the display section 100 at a predetermined frame rate, and alternately displays the first image IM1 and the second image IM2. Thereby, as one image is not displayed during displaying the other image, the cross-talk between the first image and the second image is drastically reduced. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a display control device of a so-called dual view display device that can visually recognize different images from different directions on a common display screen.

As a so-called dual view display in which different images can be viewed from different directions on a common display screen, for example, a parallax barrier is provided in front of the liquid crystal panel, and the light traveling direction from the backlight is distributed for each pixel. Thus, there is known one that can display different information (images) on the left and right (see, for example, Patent Document 1). By mounting such a display device on the vehicle, the passenger in the passenger seat can watch other images such as a television while the driver is watching the navigation image.
JP 2005-78080 A

  By the way, in the display device as described above, so-called crosstalk occurs in which both the left and right images are mixed depending on the direction of viewing the display screen. For example, if the TV image light on the passenger seat side leaks to the driver seat side and overlaps the navigation image while the driver is watching the navigation image, the driver may not be able to clearly identify the navigation information.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an image cross-over in a display control device of a display device that can visually recognize each image from different directions on a common display screen. An object of the present invention is to provide a display control device that can reduce the talk and improve the visibility of an image.

A display control device according to the present invention is a display control device that displays first and second images on first and second screens that can be viewed from different directions formed on a common display unit, respectively. A first display state in which the first image and the interpolated image are respectively displayed on the first and second screens, and a second display state in which the interpolated image and the second image are respectively displayed on the first and second screens. And a crosstalk correction display means for alternately displaying the first and second images by repeating the above.
According to this configuration, since one of the first and second images is not displayed while the other image is displayed, crosstalk between the first image and the second image is greatly reduced. The

In the above configuration, the crosstalk correction display means can employ a configuration in which an interpolated image composed of a black image is displayed together with the first or second image.
According to this configuration, by displaying a black image as the interpolation image, light leakage from the interpolation image can be reduced in the first or second image being displayed.

In the above configuration, the crosstalk correction display means can employ a configuration in which an interpolated image including a white image is displayed together with the first or second image.
According to this configuration, it is possible to suppress a decrease in the average luminance (apparent luminance) of the displayed image by increasing the luminance level of the interpolated image as a white image.

In the above configuration, the crosstalk correction display means may employ a configuration that displays an interpolated image made up of an achromatic color image together with the first or second image.
According to this configuration, it is possible to adjust the luminance by using an achromatic color image and to suppress a change in the hue of the displayed image.

In the above configuration, the crosstalk correction display unit may employ a configuration that adjusts the contrast or brightness of the image signals of the first and second images.
According to this configuration, it is possible to suppress a decrease in the average luminance of the display image caused by inserting the interpolation image by adjusting the contrast or luminance of the image signal.

In the above configuration, the crosstalk correction display means can employ a configuration that adjusts the luminance level of the interpolated image between the black image and the white image. Specifically, the brightness level of the interpolation image can be determined according to the brightness around the display unit, or the brightness level of the interpolation image can be determined according to the brightness level of the image signal.
According to this configuration, the average luminance of the displayed image can be optimized with respect to fluctuations in the luminance of the image such as ambient brightness.

In the above configuration, the crosstalk correction display unit can employ a configuration in which an image having a color complementary to the first or second image is used as an interpolation image.
According to this configuration, by making the color of the interpolation image complementary, the displayed first or second image can be clearly displayed, and crosstalk can be reduced.

In the above configuration, the crosstalk correction display means may employ a configuration in which the first or second image is partially replaced with a black image to obtain an interpolated image.
According to this configuration, it is possible to reduce the crosstalk and suppress the luminance reduction by making the black image only in the portion where the crosstalk is likely to occur.

In the above configuration, the crosstalk correction display means adjusts the average luminance of the displayed image by sorting and displaying the black interpolation image and the white interpolation image at a predetermined ratio in time. Can be adopted.
According to this configuration, the crosstalk can be improved and the luminance can be adjusted according to the ratio of the black image and the white image.

In the above configuration, the crosstalk correction display unit can employ a configuration in which an interpolated image is formed based on a set value set by a user.
According to this configuration, it is possible to adjust the image according to the user's preference.

In the above configuration, there is a signal determining unit that determines whether the image signals of the first and second images match or approximate, and the image signals of the first and second images match or approximate by the signal determining unit. If it is determined that the image signal is present, a configuration in which image signals of the first and second images are simultaneously output to the display unit can be employed. Specifically, the signal determination unit calculates the difference value between the image signals of the first and second images, and based on the integrated value in one image of the difference value, the image of the first and second images. A configuration for determining whether the signals match or approximate, calculates a difference value between the image signals of the first and second images, and based on the maximum value of the difference value in the image, the first and second images The configuration for determining whether the image signals of the first and second images match or approximate, or the signal determining means calculates a difference value between the image signals of the first and second images, and the difference value is a predetermined threshold within one image. It is possible to adopt a configuration in which it is determined whether the image signals of the first and second images match or approximate based on the number of times exceeding the value.
According to these configurations, when the first and second images are the same or similar and crosstalk does not occur, it is possible to automatically switch to a normal display operation (simultaneous display operation).

In the above configuration, it is possible to employ a configuration in which the luminance of the backlight of the display unit is increased in response to the activation of the crosstalk correction display unit.
According to this configuration, it is possible to automatically cover a decrease in luminance due to the crosstalk correction display by increasing the luminance of the backlight of the display unit.

In the above configuration, the display unit includes a movable parallax barrier for defining a direction in which the first and second images can be visually recognized, and the crosstalk correction display unit includes one image signal of the first and second images. It is possible to adopt a configuration in which the light shielding portion of the parallax barrier is extended so as to shield the other image in synchronization with the output.
According to this configuration, by extending the parallax barrier in synchronization with the output of the image signal, light leakage from the interpolated image can be reduced, and as a result, crosstalk can be reduced.

  The display device according to the present invention includes a common display unit having first and second screens that can be viewed from different directions, and display control for displaying the first and second images on the first and second screens. The display control means includes a first display state in which the first image and the interpolated image are displayed on the first and second screens, and an interpolation on the first and second screens. Crosstalk correction display means for alternately displaying the first and second images by alternately repeating the second display state in which the image and the second image are respectively displayed is provided.

  A display method according to the present invention is a display method for displaying first and second images on first and second screens that can be viewed from different directions formed on a common display unit. The first display state in which the first image and the interpolated image are respectively displayed on the second screen and the second display state in which the interpolated image and the second image are respectively displayed on the first and second screens are alternately repeated. The first and second images are alternately displayed.

  ADVANTAGE OF THE INVENTION According to this invention, in the display apparatus which can each visually recognize an image from a different direction with a common display part, the crosstalk between images can be reduced significantly and the brightness fall of the displayed image can be prevented.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the invention will be described with reference to the accompanying drawings.
FIG. 1 is a diagram for explaining a basic configuration of a dual view display device according to an embodiment of the present invention.
As shown in FIG. 1, the display device includes a display control unit 10 as a display control device, a display unit 100, and the like.
The display control unit 10 is supplied with the image data (image signal) DT1 from the first image source 300A and the image data (image signal) DT2 from the second image source 300B. The image data (image signal) ADT composed of the image data DT 1 and DT 2 is output to the common display unit 100. A specific configuration of the display control unit 10 will be described later.
The first and second image sources 300A and 300B include a camera, a TV receiving unit, a DVD playback unit, an HD playback unit, a navigation unit, and the like, which will be described later.

  As will be described later, the display unit 100 includes a liquid crystal panel, a backlight, a parallax barrier, and the like, and allows an observer OBR to view the first image IM1 based on the first image data DT1 from the right direction. The second image IM2 based on the second image data DT2 is displayed so that the observer OBL viewing from the left can view it. That is, the display unit 100 includes a screen (first screen) that can be viewed from the observer OBR side and a screen (second screen) that can be viewed from the observer OBL side. Two images IM1 are displayed. A specific configuration of the display unit 100 will be described later.

FIG. 2 is a perspective view showing an example in which the display device according to one embodiment of the present invention is applied to a vehicle.
As shown in FIG. 2, the display unit 100 of the display device is disposed between the driver seat DS and the passenger seat AS on the dashboard portion of the vehicle. The display unit 100 is provided with an operation unit 150 for manually operating the display device.
In the case shown in FIG. 2, the passenger seated in the driver seat DS is the observer OBR, and the passenger seated in the passenger seat AS is the observer OBL. Then, these passengers can simultaneously view the first image IM1 and the second image IM2 displayed on the screen of the display unit 100 from the driver seat DS side or the passenger seat AS side, respectively.

  3 to 9 are diagrams showing a specific configuration of the display device according to the embodiment of the present invention, where FIG. 3 is a functional block diagram of the display device, and FIG. 4 is a functional block diagram showing a configuration of the control unit. 5 is a functional block diagram of the first and second image quality adjustment circuits, FIG. 6 is a diagram for explaining the sectional structure and operation of the liquid crystal panel, FIG. 7 is a front view of the liquid crystal panel, and FIG. A circuit diagram and FIG. 9 are diagrams showing a configuration of the image output unit 70.

  As shown in FIG. 3, the display device includes a display unit 100, a control unit 20, a distribution circuit 30, first and second image quality adjustment circuits 50A and 50B, an image output unit 70, and the like. The display control unit 10 includes a control unit 20, a distribution circuit 30, first and second image quality adjustment circuits 50A and 50B, an image output unit 70, and the like.

  As shown in FIG. 4, the control unit 20 includes a processor 21, an interface 22, a ROM 23, a RAM 24, and the like, and comprehensively controls the display device according to a program stored in the ROM 23. The specific control by the control unit 20 will be described later.

As shown in FIG. 3, the control unit 20 includes a camera 310 that captures the surroundings of a vehicle as a supply source that is mounted on the vehicle and supplies images and sounds, and a CD / MD (compact disc) that reproduces music and images. / Mini-disc) Music information and images from the reproduction unit 320, the radio reception unit 330 that receives radio broadcast waves from the antenna, the TV reception unit 340 that receives TV broadcast waves from the antenna via the selector 341, and a DVD (digital versatile disc). The DVD playback unit 350 for playing back images, the HD playback unit 360 for playing back image and music information recorded on HD (hard disk), the road information received by the VICS information receiving unit 371, and the geographic information received by the GPS information receiving unit 372 Connected to a navigation unit 370 or the like that outputs a map or route guidance image based on To control these together to exchange chromatography data.
In addition, the control unit 20 transmits and receives infrared signals and wireless signals to and from the external memory 140 that stores various data, the operation unit 150 for operating the display device, and the remote control 171 for operating the display device by remote control. A remote control transmission / reception unit 170, a brightness detection sensor 190 configured to detect brightness in the vehicle by being configured with a light switch or a light sensor provided in the vehicle, a pressure sensitive sensor provided in a driver seat or a passenger seat, and the like. An occupant detection sensor 200 or the like for detecting the vehicle is connected, and the control unit 20 can perform various controls based on various data obtained therefrom.

As shown in FIG. 3, the distribution circuit 30 is supplied from the camera 310, the CD / MD playback unit 320, the radio reception unit 330, the TV reception unit 340, the DVD playback unit 350, the HD playback unit 360, the navigation unit 370, and the like. The audio data and image data to be processed are distributed to the audio adjustment circuit 60, the first image quality adjustment circuit 50A, or the second image quality adjustment circuit 50B in accordance with a control command from the control unit 20.
The audio adjustment circuit 60 adjusts the audio data supplied from the distribution circuit 30 and outputs it to the speaker 61 as shown in FIG.

  As shown in FIG. 5, each of the first and second image quality adjustment circuits 50A and 50B includes a contrast adjustment unit 51, a luminance adjustment unit 52, a color tone adjustment unit 53, a gamma value adjustment unit 54, and the like. The image quality (contrast, brightness, tone, and gamma value) of the first and second image data (image signal) is adjusted in accordance with the control command from.

  As shown in FIG. 3, the display unit 100 includes a liquid crystal panel 110, a backlight 120 that illuminates illumination light from the back side of the liquid crystal panel 110, a touch panel 130 for inputting a signal for operating the display device, and the like. . Although not shown, the touch panel 130 is formed in a transparent sheet shape and attached to the front surface of the liquid crystal panel 110.

As shown in FIG. 6, the liquid crystal panel 110 is a color filter substrate having a polarizing plate 111, a TFT (Thin Film Transistor) substrate 112, a liquid crystal layer 113, and RGB pixels arranged in order from the backlight 120 side. 114, a parallax barrier 115, a glass plate 116, a polarizing plate 117, and the like.
As shown in FIGS. 7 and 8, the liquid crystal panel 110 has a display screen in which, for example, 800 pixels in the horizontal direction and 480 pixels in the vertical direction are arranged. Pixels 118 (hereinafter also referred to as passenger seat side display pixels 118) and right side display pixels 119 (hereinafter also referred to as driver seat side display pixels 119) are alternately arranged.

As shown in FIGS. 6 and 7, the parallax barrier 115 is formed in a stripe shape and includes a shielding part and a translucent part. The shielding part is formed by the adjacent left display pixel 118 and right display pixel 119. Arranged between. By disposing the parallax barrier 115 on the front surface of the color filter substrate 114, the illumination light transmitted through the left display pixel 118 selectively passes through the light-transmitting part of the parallax barrier 115 selectively toward the left side, and is displayed on the right side. Of the illumination light transmitted through the pixel 119, only the illumination light directed toward the right side selectively passes through the light transmitting portion of the parallax barrier 115. As a result, as shown in FIG. 6, the first image IM1 can be viewed from the right side (driver's seat side) of the liquid crystal panel 110, and the second image IM2 can be viewed from the left side (passenger seat side). ing.
The parallax barrier 115 can be the same as those disclosed in JP-A-10-123461 and JP-A-11-84131.

As shown in FIG. 8, the TFT substrate 112 includes a data line driving circuit DR1, a scanning line driving circuit DR2, scanning lines SCL arranged in the vertical direction, data lines DTL arranged in the horizontal direction, scanning lines SCL and data lines. A TFT element EL formed in each region intersecting with the DTL, a pixel electrode EP formed corresponding to the TFT element EL, and the like, and each region surrounded by the scanning line SCL and the data line DTL includes a subpixel SBP. The sub-pixels SBP in each column along the data line DTL are alternately assigned to the left display pixel 118 and the right display pixel 119.
The data line driving circuit DR1 is controlled in driving timing by a liquid crystal panel driving unit 74 described later, and controls the voltage applied to the pixel electrode EP.
The scanning line driving circuit DR2 selectively scans the TFT element EL by controlling the driving timing by a liquid crystal panel driving unit 74 described later.

  The memory 140 is configured by, for example, an electrically rewritable nonvolatile memory such as a flash memory or a battery-backed volatile memory, and stores data necessary for control by the control unit 20.

As shown in FIG. 9, the image output unit 70 includes frame memories 510A and 510B, auxiliary frame memories 520A and 520B, a liquid crystal panel drive unit 74, changeover switches SW1 and SW2, and the like.
In the frame memories 510A and 510B, for example, first and second image data (image signals) DT1 and DT2 adjusted in image quality by the first and second image quality adjustment circuits 50A and 50B, respectively, are written. These first and second image data DT1, DT2 are image signals (video signals) from the TV receiving unit 340, the DVD reproducing unit 350, the navigation unit 370, etc., for example, the frame memory 510A, Written to 510B.
Interpolated image data SB1 and SB2 are written in the auxiliary frame memories 520A and 520B by the control unit 20, respectively.
The interpolated image data SB1 and SB2 are data for displaying a black image, a white image, and the like on the display unit 100, as will be described later.

The changeover switch SW1 is a switch that selectively connects the fixed contacts C1 and C2 and the movable contact C3 according to a synchronization signal SC input from the control unit 20 at a predetermined frame rate (for example, 120 Hz). When the fixed contact C1 and the movable contact C3 are connected, the image data DT1 for one image (one frame) held in the frame memory 510A is output to the liquid crystal panel driving unit 74, and the fixed contact C2 and the movable contact C3 are connected. When connected, the interpolated image data SB1 for one image (one frame) held in the auxiliary frame memory 520A is output to the liquid crystal panel drive unit 74.
The change-over switch SW2 is a switch that selectively connects the fixed contacts C1, C2 and the movable contact C3 in accordance with a synchronization signal SC input from the control unit 20 at a predetermined frame rate (for example, 120 Hz). When the fixed contact C1 and the movable contact C3 are connected, the image data DT2 for one image (one frame) held in the frame memory 510B is output to the liquid crystal panel drive unit 74, and the fixed contact C2 and the movable contact C3 are connected. When connected, the interpolated image data SB2 for one image (one frame) held in the auxiliary frame memory 520B is output to the liquid crystal panel drive unit 74.
The connection timing of the changeover switch SW2 is opposite to that of the changeover switch SW1. When the fixed contact C1 and the movable contact C3 of the changeover switch SW1 are connected, the changeover switch SW2 is movable with the fixed contact C2 of the changeover switch SW2. When the contact C3 is connected and the fixed contact C2 and the movable contact C3 of the changeover switch SW1 are connected, the fixed contact C1 and the movable contact C3 of the changeover switch SW2 are connected. The change-over switches SW1 and SW2 are constituted by semiconductor switches such as transistors.

  The liquid crystal panel driving unit 74 is a circuit that drives a liquid crystal panel 110 (to be described later) of the display unit 100, and based on data held in the frame memory 510A or the auxiliary frame memory 520A, an image on the driver's seat (D seat) side. Liquid crystal display for driving the pixels of the liquid crystal display panel 110 for displaying the image and displaying the image on the passenger seat (P seat) side based on the data held in the frame memory 510B or the auxiliary frame memory 520B The pixels of the panel 110 are driven. In the liquid crystal panel driving unit 74, data rearrangement processing corresponding to each pixel of the liquid crystal panel 110 is performed.

Next, an example of the display control process performed by the control unit 20 will be described with reference to FIGS.
Here, FIG. 10 is a flowchart showing a flow of basic display control processing by the control unit, and FIGS. 11 to 13 are signals for judging whether the first and second image data are approximated by comparing each frame. FIG. 14 is a diagram for explaining an example of a crosstalk correction display process using a black image.
The display control process by the control unit 20 is repeatedly executed during image display.

First, the control unit 20 determines whether the first and second image data (image signals) DT1 and DT2 input to the frame memories 510A and 510B match or approximate (step ST1).
The control unit 20 connects the fixed contact C1 and the movable contact C3 of the changeover switches SW1 and SW2 when the two match or approximate according to the comparison result of the first and second image data DT1 and DT2, The first and second image data DT1 and DT2 are simultaneously output to the liquid crystal panel driving unit 74 and displayed simultaneously (step ST2). When the first and second image data (image signals) DT1 and DT2 match or approximate, crosstalk does not occur or the amount of generation is small, so it is necessary to display crosstalk correction described later. Because there is no.

Here, a circuit for comparing the first and second image data DT1 and DT2 will be described.
The circuit shown in FIG. 11 includes a difference circuit 600, an absolute value calculation circuit 610, an in-frame integration circuit 620, a comparison circuit 650, and the like.
The difference circuit 600 calculates a difference value between the first and second image data DT1 and DT2.
The absolute value calculation circuit 610 calculates the absolute value of the difference value.
The intra-frame integration circuit 620 calculates an integrated value in one frame (one image) of the absolute value of the difference value.
Comparison circuit 650 compares the integrated value with a predetermined threshold value and outputs a comparison signal. When the integrated value is larger than the predetermined threshold value, the first and second image data DT1 and DT2 are not approximated. When the integrated value is small, it can be determined that they are coincident or approximated.
The circuit shown in FIG. 11 is built in, for example, the control unit 20, the input of the difference circuit 600 is connected to the frame memories 510A and 510B, and the output of the comparison circuit 650 is connected to the CPU 21.

The circuit shown in FIG. 12 has an intra-frame maximum value detection circuit 630 instead of the intra-frame integration circuit 62 of FIG.
The in-frame maximum value detection circuit 630 detects the maximum value in one frame of the absolute value of the difference value and outputs it to the comparison circuit 650.

The circuit illustrated in FIG. 13 includes a comparison circuit 660, a counter circuit 670, and a comparison circuit 680 subsequent to the absolute value calculation circuit 610.
The comparison circuit 660 determines whether the absolute value of the difference value between the image data DT1 and DT2 of the first and second images exceeds a predetermined threshold value 1, and the counter circuit 670 determines that the absolute value of the difference value is a predetermined value. The comparison circuit 680 counts the number of times the threshold value is exceeded, and determines whether the count value of the counter circuit 670 exceeds a predetermined threshold value 2. When the count value exceeds the threshold value 2, the image data DT1 and DT2 are not approximated. When the count value is not exceeded, it can be determined that they match or approximate.

  On the other hand, when the first and second image data DT1 and DT2 are different (for example, when one is a navigation image and the other is a TV image), the control unit 20 executes a crosstalk correction display process. (Step ST3).

In the crosstalk correction display process, the control unit 20 drives the changeover switches SW1 and SW2 with a synchronization signal, and as shown in FIG. 14, the first image IM1 (driver seat side image, hereinafter referred to as D seat image). And the second image IM2 (passenger side image, hereinafter referred to as P seat image) and the above-described predetermined frame rate (for example, 120 Hz) are alternately displayed on the liquid crystal panel 110.
Further, prior to the crosstalk correction control, the control unit 20 has previously written interpolation image data SB1 and SB2 for forming a black image in the auxiliary frame memories 520A and 520B, respectively, as shown in FIG. When the D seat image IM1 (for example, a navigation image) is displayed, the interpolated image IMB2 composed of a black image is displayed on the P seat side.
As shown in FIG. 14B, when a P seat image IM2 (for example, a TV video) is displayed, an interpolated image IMB1 composed of a black image is displayed on the D seat side.
As shown in FIG. 14C, when the D seat image IM1 is displayed again, the interpolated image IMB2 composed of a black image is displayed on the P seat side.

In this way, the D seat image IM1 and the P seat image IM2 are alternately displayed on the display unit 100 at a frame rate of 120 Hz, and when one image is displayed, the other image is an interpolation composed of a black image. The image is replaced with the image IMB1 or IMB2 and displayed.
For this reason, light leakage from one of the D seat image IM1 and the P seat image IM2 to the other is reduced, and crosstalk between the D seat image IM1 and the P seat image IM2 can be significantly reduced.

  Next, the control unit 20 controls to increase the luminance of the backlight 120 (step ST4). When interpolated images IMB1 and IMB2 each consisting of a black image are inserted between the D seat image IM1 and the P seat image IM2 that are temporally adjacent, the average luminance of the images IM1 and IM2 displayed on the display unit 100 is increased. This is lower than when the interpolated images IMB1 and IMB2 are not inserted. For this reason, the brightness | luminance of the backlight 120 can be raised, and the fall of the average brightness | luminance of a display image can be prevented.

Next, another example of the crosstalk correction display process by the control unit 20 will be described with reference to FIGS. 15 and 16.
As shown in FIG. 15, the control unit 20 first determines whether to output a black image as an interpolated image (step ST21). When outputting a black image, the control unit 20 reduces the average luminance of the displayed image. In order to prevent this, the contrast or brightness (luminance) of the image data (image signals) DT1 and DT2 of the first and second images is adjusted so as to increase the average luminance of the displayed image. The contrast or brightness is adjusted by outputting a control signal from the control unit 20 to the first and second image quality adjustment circuits 50A and 50B.
Then, the control unit 20 executes the same crosstalk correction display as described above (step ST23). Thus, by adjusting the contrast or brightness of the image signal, it is possible to prevent a decrease in luminance of the display image when a black image is used as the interpolated image.

On the other hand, when the black image is not used as the interpolation image in step ST21, the control unit 20 uses the white image as the interpolation image (step ST24). In this case, the control unit 20 writes the interpolated image data SB1 and SB2 for forming a white image in the auxiliary frame memories 520A and 520B, respectively.
When a white image is set as the interpolated image, when the D seat image IM1 is displayed, as shown in FIG. 16A, an interpolated image IMW2 composed of a white image is displayed at the same time, and when the P seat image IM2 is displayed. As shown in FIG. 16B, an interpolated image IMW1 composed of a white image is displayed at the same time. By inserting the interpolated images IMW1 and IMW2 made up of white images between the display of the D seat image IM1 and the P seat image IM2, the white image has a higher luminance than the black image. Apparent luminance) can be increased.

Next, still another example of the crosstalk correction display process by the control unit 20 will be described with reference to FIGS. 17 and 18.
As shown in FIG. 17, the control unit 20 first determines whether to optimally adjust the average luminance of the display image (step ST31). Whether or not to optimally adjust the average luminance of the display image is set by the user, and the information is stored in the memory 140 in advance.
When the optimal adjustment is not performed, the control unit 20 adjusts the average luminance level of the display image using a preset setting value (step ST32). This adjustment is an adjustment such as increasing the luminance of the backlight 120.
Next, the control unit 20 acquires, from the memory 140, information related to the ratio of the black and white images when the black and white images are sorted and displayed temporally (step ST33). The ratio between the black image and the white image is set in advance by the user or the like. For example, when the average luminance of the display image is increased, black image 10 + white image 50 in 60 frames, when the average luminance is moderate, when black image 30 + white image 30, the average luminance is decreased. Is set to a ratio of black image 50 + white image 10.
Then, during the crosstalk correction display, the black image and the white image are sorted and displayed according to the set ratio (step ST39). Thereby, the average luminance of the displayed image is adjusted according to the set ratio of the black image and the white image.

  On the other hand, when optimally adjusting the average luminance of the display image in step ST31, the control unit 20 determines whether or not to optimally adjust the average luminance of the display image according to the brightness around the display unit 100. . Whether or not to adjust the brightness according to the ambient brightness is set by the user or the like, and the information is stored in the memory 140 in advance. When the luminance is adjusted according to the ambient brightness, the brightness is detected based on the detection signal from the brightness detection sensor 190 or the like (step ST35).

  Next, the control unit 20 determines whether to optimally adjust the average luminance of the display image according to the average level of the image data (image signals) DT1 and DT2 of the first and second images (step ST36). Whether or not to optimally adjust the average luminance of the display image according to the average level of the image signal is set by a user or the like, and the information is stored in the memory 140 in advance. When the luminance is adjusted according to the average level of the image signal, the average level of the image data (image signal) DT1, DT2 of the first and second images is detected (step ST37). The higher the average level of the image signal, the higher the average luminance of the display image, and the lower the average level, the lower the average luminance of the image.

Next, the control unit 20 determines the luminance level of the interpolated image according to the brightness around the display unit 100 detected in step ST35 and / or the average level of the image signal detected in step ST37. The luminance level of the interpolated image is determined, for example, by selecting a luminance value from a luminance map set in advance according to the ambient brightness and signal level (step ST38).
In this way, when the luminance of the interpolated image is determined in accordance with the ambient brightness and the average level of the image signal, at the time of crosstalk correction display (step ST39), for example, as shown in FIG. An interpolated image is displayed. For example, when the surrounding brightness is large or the average level of the image signal is high, an interpolated image IMB2 composed of a black image with low luminance is displayed as shown in FIG. As shown in FIG. 18 (b), the interpolated image IMG2 made of gray is displayed, and when the surrounding brightness is low or the average level of the image signal is high, the interpolated image IMW2 made of white is displayed. The luminance level is optimally adjusted between the black screen and the white screen.
As a result, the average luminance of the image displayed on the display device 100 is optimally adjusted, and an image that is easy for the user to view is displayed.
In addition, by making the interpolated image only an achromatic color image such as a black image, a gray image, and a white image, and not using a chromatic color image, the brightness can be adjusted and the color of the displayed image changes. Can be suppressed.

FIG. 19 is a functional block diagram illustrating another configuration example of the image output unit.
The image output unit 70A illustrated in FIG. 19 includes complementary color arithmetic circuits 540A and 540B in the previous stage of the auxiliary frame memories 520A and 520B.
The complementary color arithmetic circuit 540A calculates interpolated image data of a color having a complementary color relationship with the D seat image IM1 formed by the first image data DT1, and outputs the interpolated image data to the auxiliary frame memory 520A.
The complementary color calculation circuit 540B calculates interpolated image data of a color having a complementary color relationship with the P seat image IM2 formed by the second image data DT2, and outputs the calculated interpolated image data to the auxiliary frame memory 520B.

FIG. 20 is a diagram illustrating an example of an image displayed with crosstalk correction by the image output unit 70A.
While the D seat image IM1 is being displayed, an interpolated image IMC2 of a color complementary to the P seat image IM2 is displayed as shown in FIG. 20A, and while the P seat image IM2 is being displayed, FIG. As shown in (b), an interpolated image IMC1 having a color complementary to the D seat image IM1 is displayed.
In this way, the D seat image IM1 and the P seat image IM2 are displayed clearly by inserting the interpolation images IMC1 and IMC2 of complementary colors into the D seat image IM1 and the P seat image IM2, respectively. And crosstalk can be reduced.

FIG. 21 is a functional block diagram illustrating still another configuration example of the image output unit.
The image output unit 70A illustrated in FIG. 21 includes synthesis circuits 530A and 530B in the previous stage of the auxiliary frame memories 520A and 520B.

  The synthesizing circuit 530A obtains coordinate data CD1 (AX1, AY1, AX2, AY2) for defining a specific portion in the first image data DT1 from the control unit 20, and the first data defined by the coordinate data CD1. The specific portion of the one image data DT1 is replaced with a black image and output to the auxiliary frame memory 520A. AX1 and AY1 are the start coordinates of the specific part, and AX2 and AY2 are the end coordinates of the specific part. The coordinate data CD1 is information for specifying a portion where crosstalk is likely to occur in the second image data DT2. For example, in the case of a navigation image, an area where crosstalk is likely to occur can be extracted by analyzing map information obtained in advance.

  The synthesizing circuit 530B acquires coordinate data CD2 (BX1, BY1, BX2, BY2) for defining a specific portion in the second image data DT2 from the control unit 20, and the first circuit defined by the coordinate data CD2. The specific portion of the second image data DT2 is replaced with a black image and output to the auxiliary frame memory 520B. BX1 and BY1 are the start coordinates of the specific part, and BX2 and BY2 are the end coordinates of the specific part. Further, the coordinate data CD2 is information for specifying a portion where crosstalk is likely to occur in the second image data DT1.

FIG. 22 is a diagram illustrating an example in which an interpolated image is obtained by partially replacing an image with a black image by the above-described combining circuit.
In this example, while the D seat image IM1 is displayed, as shown in FIG. 22A, an interpolated image IMB2 composed of a black image is displayed, and while the P seat image IM2 is displayed, the D seat image IM1 is displayed. The interpolated image IMP1 partially replaced with the black image BL is simultaneously displayed.
The partial black image BL corresponds to a region R1 in the P seat image IM2, and this region R1 is a portion where crosstalk is likely to occur.
When the interpolated image is formed by replacing the image with a partial black image in this way, the crosstalk between the D seat image IM1 and the P seat image IM2 can be reduced, and the interpolated image is formed with all black images. As compared with the above, it is possible to suppress a decrease in the average luminance of the displayed image.

FIG. 23 is a diagram illustrating an example of a setting screen related to crosstalk correction by the user.
This setting screen is displayed on the display screen of the display unit 100, and a setting screen related to crosstalk correction is displayed by selecting the touch switch D1 shown in FIG.
The touch switch D10 is a switch for turning on / off the crosstalk correction display. When the user turns on the switch, the display control unit 10 executes crosstalk correction display processing and turns it off. The simultaneous display process described above is executed.
The touch switch D11 is a switch for turning on / off the luminance optimum adjustment process according to the brightness around the display unit 100 described in FIG.
The touch switch D12 is a switch for turning on / off the luminance optimum adjustment process according to the image signal level described in FIG.
The touch switch D13 is a switch for turning on / off the crosstalk correction display process in which the interpolation image is formed with a partial black image, which has been described with reference to FIGS.
The touch switch D14 is a switch for turning on / off the crosstalk correction display processing for temporally distributing the white and black interpolated images described in FIG.
The touch switch D15 is a switch for turning on / off the crosstalk correction display process using the interpolated image composed of the complementary colors described in FIGS.
The touch switch D20 is a switch for storing and recalling various user setting values related to the crosstalk correction display processing. For example, the current setting value is stored by long pressing of the switch, and the setting value is called by short pressing.

  Thus, by appropriately forming the setting screen by the user, the crosstalk correction display process of the control unit 20 can be optimized by the user.

In the above embodiment, the fixed parallax barrier 115 in the display unit 100 is used. However, the parallax barrier 115 is not limited to this, and a movable visual field barrier made of liquid crystal or the like can also be used.
Specifically, for example, as shown in FIGS. 24 and 25, a movable parallax barrier 700 is disposed to face the color filter substrate 114. The parallax barrier 700 includes a light shielding part 710 and a light transmitting part 720 formed of liquid crystal, and the light shielding part 710 and the light transmitting part 720 are movable.

An example of the crosstalk correction display on the liquid crystal panel 110 to which the movable parallax barrier 700 is applied will be described. As shown in FIG. 24, when the P seat image IM2 is displayed, the light shielding unit 710 is synchronized with this. The movable parallax barrier 700 is controlled so as to extend and block the light of the interpolated image IMB1. Further, as shown in FIG. 25, when the D seat image IM1 is displayed, the display control unit 10 moves the movable part 710 in a movable manner so as to extend the light shielding unit 710 and block the light of the interpolated image IMB2. The parallax barrier 700 is controlled.
In this way, by driving the movable parallax barrier 700 in synchronization with the frame rate of the crosstalk correction display, light leakage of the interpolated image IMB1 or IMB2 can be reduced, and crosstalk can be further reduced.

  In the above embodiment, the case where a liquid crystal panel is used for the display unit 100 has been described. However, the present invention is not limited to this, and a flat panel display other than the liquid crystal panel, for example, an organic EL display panel, a plasma display panel, a cold cathode A flat panel display or the like can also be used.

  The above embodiment is a preferred embodiment of the present invention. However, the present invention is not limited to this, and various modifications can be made without departing from the scope of the present invention.

It is a figure for demonstrating the basic composition of the display apparatus which concerns on one Embodiment of this invention. It is a perspective view which shows the example of application to the vehicle of a display apparatus. It is a functional block diagram which shows the structure of a display apparatus. It is a functional block diagram which shows the structure of a control part. It is a functional block diagram which shows the structure of the 1st and 2nd image quality adjustment circuit. 3 is a diagram showing a cross-sectional structure of a display unit 100. FIG. It is a front view of a liquid crystal panel. It is a circuit diagram of a TFT substrate. It is a functional block diagram which shows the structure of an image output part. It is a flowchart which shows the flow of the basic display control processing by a control part. It is a figure which shows an example of the circuit for judging whether the 1st and 2nd image data are approximated by comparing for every flame | frame. It is a figure which shows the other example of the circuit for judging whether the 1st and 2nd image data are approximated by comparing for every flame | frame. It is a figure which shows the further another example of the circuit for judging whether the 1st and 2nd image data are compared and approximated for every flame | frame. It is a figure for demonstrating an example of a crosstalk correction display process. It is a flowchart for demonstrating the other example of a crosstalk correction display process. It is a figure for demonstrating the crosstalk correction display process by a white image. It is a flowchart for demonstrating the further another example of a crosstalk correction display process. It is a figure which shows an example of the interpolation image which changed the brightness | luminance. It is a functional block diagram which shows the other structural example of an image output part. It is a figure for demonstrating an example of the crosstalk correction display by a complementary color. It is a functional block diagram which shows the other structural example of an image output part. It is a figure for demonstrating the crosstalk correction display by a partial black drawing. It is a figure which shows an example of the setting screen regarding the crosstalk correction by a user. It is a figure for demonstrating an example of the crosstalk correction display using a movable parallax barrier. It is a figure for demonstrating an example of the crosstalk correction display using a movable parallax barrier.

Explanation of symbols

10. Display control unit (display control device)
DESCRIPTION OF SYMBOLS 20 ... Control part 30 ... Distribution circuit 50A, 50B ... 1st and 2nd image quality adjustment circuit 60 ... Audio | voice adjustment circuit 70 ... Image output part 100 ... Display part 110 ... Liquid crystal panel 120 ... Backlight 130 ... Touch panel 140 ... Memory 150 ... Operation unit 170 ... Remote control transmission / reception unit 190 ... Brightness detection sensor 200 ... Occupant detection sensors 300A, 300B ... Image source 310 ... Camera 320 ... CD / MD playback unit 330 ... Radio reception unit 340 ... TV reception unit 350 ... DVD playback unit 360... HD playback unit 370... Navigation units 510A and 510B... Frame memories 520A and 520B. Circuit 630... Maximum value detection times in frame 650, 660, 680... Comparison circuit 670... Counter circuit 700. Movable parallax barrier 710... Shielding part 720 .. Translucent part SC .. Sync signal SB1, SB2 ... Interpolated image data SW1, SW2. Passenger seat

Claims (20)

A display control device that displays first and second images on first and second screens that can be viewed from different directions formed on a common display unit, respectively,
A first display state in which the first image and the interpolated image are displayed on the first and second screens, respectively, and a second display state in which the interpolated image and the second image are displayed on the first and second screens, respectively. A display control apparatus comprising crosstalk correction display means for alternately displaying the first and second images by alternately repeating a display state.   The display control apparatus according to claim 1, wherein the crosstalk correction display unit displays an interpolated image including a black image together with the first or second image.   The display control apparatus according to claim 1, wherein the crosstalk correction display unit displays an interpolated image including a white image together with the first or second image.   The display control apparatus according to claim 2, wherein the crosstalk correction display unit displays an interpolated image including an achromatic color image together with the first or second image.   The display control apparatus according to claim 1, wherein the crosstalk correction display unit adjusts contrast or brightness of image signals of the first and second images.   The display control apparatus according to claim 1, wherein the crosstalk correction display unit adjusts a luminance level of the interpolated image between a black image and a white image.   The display control apparatus according to claim 6, wherein the crosstalk correction display unit determines a luminance level of the interpolated image according to brightness around the display unit.   The display control apparatus according to claim 6, wherein the crosstalk correction display unit determines a luminance level of the interpolated image according to a luminance level of the image signal.   2. The crosstalk correction display unit uses the first or second image and a color image having a complementary color relationship with the first or second image as the interpolation image. Display controller.   The display control apparatus according to claim 1, wherein the crosstalk correction display unit partially replaces the first or second image with a black image to form the interpolated image.   2. The display control apparatus according to claim 1, wherein the crosstalk correction display means displays the black interpolation image and the white interpolation image at a predetermined ratio in time.   12. The display control apparatus according to claim 1, wherein the crosstalk correction display unit forms the interpolated image based on a setting value set by a user. Signal judging means for judging whether the image signals of the first and second images match or approximate;
When it is determined by the signal determining means that the image signals of the first and second images match or approximate, the image signals of the first and second images are simultaneously output to the display unit. The display control apparatus according to claim 1, wherein the display control apparatus is a display control apparatus.   The signal determining means calculates a difference value between the image signals of the first and second images and, based on an integrated value in one image of the difference value, determines the image signals of the first and second images. The display control apparatus according to claim 13, wherein the display control apparatus determines whether they match or approximate.   The signal determining means calculates a difference value between the image signals of the first and second images, and based on a maximum value of the difference value in one image, the image signals of the first and second images are calculated. The display control apparatus according to claim 13, wherein the display control apparatus determines whether they match or approximate. The signal determining means calculates a difference value between the image signals of the first and second images, and based on the number of times that the difference value exceeds a predetermined threshold in one image, the first and second images Determine whether the image signals of the images match or approximate,
The display control apparatus according to claim 13.   13. The display control apparatus according to claim 1, wherein the brightness of the backlight of the display unit is increased in response to the activation of the crosstalk correction display unit. The display unit includes a movable parallax barrier for defining a direction in which the first and second images can be visually recognized,
The crosstalk correction display means extends the light shielding portion of the parallax barrier so as to shield the other image in synchronization with the output of one image signal of the first and second images. Item 3. The display control device according to Item 1 or 2. A display device having a common display unit having first and second screens that can be viewed from different directions, and display control means for displaying the first and second images on the first and second screens. There,
The display control means includes a first display state in which the first image and the interpolated image are displayed on the first and second screens, respectively, and the interpolated image and the second image on the first and second screens. A display device comprising crosstalk correction display means for alternately displaying the first and second images by alternately repeating a second display state to be displayed.
A display method for displaying first and second images on first and second screens that can be viewed from different directions formed on a common display unit,
A first display state in which the first image and the interpolated image are displayed on the first and second screens, respectively, and a second display state in which the interpolated image and the second image are displayed on the first and second screens, respectively. A display method comprising: alternately displaying the first and second images by alternately repeating display states.

Images