KR100442739B1 - Shutterless 3-Dimensional Image Display Device Using Radial Projection - Google Patents

Abstract

The present invention relates to a volumetric image display apparatus capable of radiation projection without a shutter apparatus that can three-dimensionally display the exterior and the inside of an object in a three-dimensional space without a shutter apparatus. To this end, the connecting rod 9 is rotatable about one end, the first mirror 22 is inclined at a predetermined angle on the rotation axis is fixed; A light source (1) and a target lens (7) installed at the other end of the connecting rod (9) to project light toward the first mirror (22); A first mirror (22), a second mirror (24), and a third mirror (26) rotatable integrally with the connecting rod (22); A screen (10) installed on the rotation axis and rotatable integrally with the second rotating plate (42) and projecting an image reflected from the third mirror (26); A first rotating plate 32 installed below the rotating surface of the connecting rod 9 and rotatable independently of the connecting rod 9; And an image installed in a ring shape on the first rotating plate 32 and positioned between the rotating light source 1 and the target lens 7 and photographing an external shape and an interior of an object at a predetermined angle in a radial direction ( Each film 46 is provided with a film 3 provided with a black mask 48 through which light does not pass.

Description

Shutterless 3-Dimensional Image Display Device Using Radial Projection}

The present invention relates to a three-dimensional volumetric image display apparatus, and more particularly, to a volumetric image display apparatus capable of radiation projection without a shutter apparatus that can three-dimensionally display the exterior and the inside of an object in a three-dimensional space without a shutter apparatus. It is about.

In general, in order to obtain a three-dimensional image, a stereoscopic photograph using a hologram or a stereoscopic movie that looks at a screen while wearing special glasses is known. In the case of holograms, objects are displayed three-dimensionally by using the wavelength characteristics of light rays, but the visible region is also limited to a two-dimensional plane. Therefore, there is a disadvantage in that the realism is inferior, and there is a limit in the expression of colors.

In the case of a three-dimensional film, the screen is divided by an interlaced pattern that is responsible for the right and left fields of vision, and is then projected to each field of view using glasses or lenticular lenses specially made to match the refresh rate of the screen. The method was used. However, this conventional method has a disadvantage in that it cannot provide a field of view more than 180 degrees with respect to the plane in that it is a display method based on two dimensions.

To remedy this, the concept of direct volume display, which provides images in real space, began in 1950. In other words, the volume information is encoded in a flat screen or a light source that rotates at a high speed, and the light rays of the object are perceived in the volume in the screen rotated by the afterimage of time. For example, U.S. Pat.Nos. 2,967,905 (M. Hirdsch, 1961) and 3,140,415 (R.D. Ketchpel, 1964) used a method of scanning a CRT's electron beam on a high-speed rotating screen.

Subsequently, volumetric image output devices of US Pat. Nos. 4,063,233 (Rowe in 1977) and 4,881,068 (Korevaar in 1989) were developed due to the development of semiconductor / laser technology. .

In order to overcome this limitation, a direct volume image display device capable of moving images using a high speed laser scanner and an LCD projector has also been developed. For example, it represents a volume by projecting onto a plane or a helix structure (USP 5,042,909 / USP 4,871,231 / USP 5,148,310). However, the drawback of this invention is that the number of pixels and the colors expressed are limited by the color of the laser and the speed of the scanner, so that a plurality of colors or images larger than 24 inches cannot be output.

In particular, the 3D imaging apparatus required a high speed shutter apparatus to obtain a clearer image. Such a high speed shutter device is expensive and inconvenient to precisely synchronize the shutter timing.

In addition, to overcome the lack of pixels, the film (USP 4,294,523) was devised using a strobe light source synchronized with rotation without a shutter, but the viewing angle is limited to the plane, and the output part is gear-like rotation. Because it was part of the screen, it was impossible to enlarge it.

Accordingly, the present invention has been made to solve the above problems, the first object of the present invention is to display a three-dimensional volume image by projecting the image on a rotating screen without a separate shutter device, It is to provide a volumetric image display apparatus using radiation projection that can be enlarged.

A second object of the present invention is to provide a volumetric image display apparatus using radiation projection that can display different images by controlling the position of the film by arranging a plurality of images of different objects on the film.

An object of the present invention as described above, the connection rod 9 is rotatable about one end, the first mirror 22 is inclined at a predetermined angle on the rotation axis is fixed; A light source (1) installed at the other end of the connecting rod (9) for projecting light toward the first mirror (22); A target lens 7 installed between the light source 1 and the first mirror 22 of the other end of the connecting rod 9; It is rotatable integrally with the connecting rod 22, a second mirror 24 is provided on the rotation axis for reflecting the image reflected from the first mirror 22, the edge of the second mirror 24 A second rotating plate 42 having a third mirror 26 for reflecting the image reflected from the second mirror; A screen (10) installed on the rotation axis and rotatable integrally with the second rotating plate (42) and projecting an image reflected from the third mirror (26); A first rotating plate 32 installed below the rotating surface of the connecting rod 9 and rotatable independently of the connecting rod 9; And an image 46 installed in a ring shape on the first rotating plate 32 and positioned between the rotating light source 1 and the target lens 7, and photographing an external shape of an object at a predetermined angle in a radial direction. It can be achieved by a volume image display apparatus capable of radiation projection without a shutter device, characterized in that the film 3 is provided with a black mask 48 that does not pass light between.

In addition, the film 3 is installed at a position that can pass between the light source 1 and the target lens 7 on the first rotating plate 32, and one end thereof is connected to the target lens 7. It is preferable that a cross bar 5 which is connected to the light source 1 at the other end after bypassing the film 3 is further provided.

In addition, a plurality of through holes 38 are formed in the first rotating plate 32, and a plurality of columns 36 inserted into the through holes 38 in the lower portion of the film 3 and movable in the axial direction. Further formed, the one side of the first rotating plate 32 further includes a vertical drive device 40 for controlling the axial position of the column 36, the film 3 is a different object It is more preferable that the film photographing is connected in the axial direction, and project each object onto the screen 10 according to the axial position.

In addition, the first rotation shaft 18 formed on the rotation center of the connecting rod (9); A first motor (14) for rotating the first rotating shaft (18); A hollow second rotation shaft 20 installed on the rotation center of the first rotation plate 32 and through which the first rotation shaft 18 passes; And a second motor 12 for rotating the second rotation shaft 20.

In addition, the cylindrical base 28 is provided with the first rotating plate 32 and the first and second motors 14 and 12; And a transparent cylindrical structure 30 which is connected to the base 28 and forms a space therein so that the screen 10 can rotate therein.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.

1 is a cross-sectional view of a volume image display apparatus capable of radiation projection without a shutter device according to the present invention;

FIG. 2 is a schematic exploded perspective view of the volume image display device shown in FIG. 1;

3 is a partially enlarged view of the film 3 and the film 3 shown in FIG. 2.

<Short Description of Main Reference Signs>

1: light source, 3: film,

5: cross bar, 7: target lens,

9: connecting rod, 10: screen,

18: first axis of rotation, 20: second axis of rotation,

22: first mirror, 24: second mirror,

26: third mirror, 28; Base,

30: cylindrical structure, 32: first rotating plate,

36: column, 38: through hole,

42: second rotating plate, 48: black mask.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of a volume image display apparatus capable of radiation projection without a shutter device according to the present invention, Figure 2 is a schematic exploded perspective view of the volume image display device shown in FIG. As shown in FIG. 1 and FIG. 2, the volumetric image display device of the present invention has a substantially cylindrical shape and includes a transparent cylindrical structure 30 at an upper portion and a base 28 at a lower portion thereof. The screen 10 is where the image is projected, and may rotate at a constant angular velocity in the cylindrical structure 30.

The rotating shaft of the first motor 14 is connected to the first rotating shaft 18, and the first mirror 22 is inclined at an angle of about 45 degrees at the end of the first rotating shaft 18. The light source 1 and the target lens 7 are mounted at the ends of the connecting rod 9 extending horizontally from the first rotation shaft 18.

A gap is formed between the light source 1 and the target lens 7 so that the film 3 can pass therethrough, and one end of the cross bar 5 is connected to the target lens 7, and an intermediate region is formed of a film ( 3) the other end is connected to the light source 1 by bypassing it so as not to come into contact with it. The crossbar 5 causes the device mounted on the connecting rod 9 to rotate integrally with the first rotation shaft 18.

The third mirror 26 extends from the light source 1 and is integrally fixed to the connecting bar 9 so as to project an image on the screen 10, and the second mirror 24 is formed by the second rotating plate ( It is fixed at the position where the central region of the screen 42 and the screen 10 meet, and is configured to rotate integrally with the second rotating plate 42, the third mirror 26 to reflect the image reflected from the first mirror 22 Reflects the function.

The light source 1 can emit light with high illuminance toward the first mirror 22, ie, in the axial direction, and the object lens 7 is positioned on the optical path of the light passing through the film 3 and the first mirror. It functions to illuminate the image with (22). To this end, the interior of the object lens 7 is composed of a combination of a plurality of convex lenses and concave lenses.

The rotating shaft of the second motor 12 is connected to the second rotating shaft 20 through a gear train (not shown). The second rotating shaft 20 is integrally formed at the center of the first rotating plate 32, and is formed to be hollow so that the first rotating shaft 18 can pass therethrough.

The first rotating plate 32 is located below the connecting bar 9, and the film 3 is provided in a ring shape on the upper surface. In particular, the film 3 has a constant curvature so that it can be inserted between the rotating light source 1 and the object lens 7. In addition, three through-holes 38 are formed in the first rotating plate 32, and three columns 36 are fixed to the lower portion of the film 3 so as to be inserted corresponding to each through-hole 38. It is.

The column 36 is movable in the vertical direction in the through hole 38, the position of the vertical direction can be controlled by the vertical drive device (40). That is, a step motor (not shown) is provided inside the vertical drive device 40, and a rack is formed on the surface of the column 36, and the step motor is rotated by a predetermined angle according to an external pulse command to thereby rotate the column 36. You can control the vertical position of.

The second rotating plate 42 is positioned vertically spaced apart from the first rotating plate 32 by a predetermined distance, and is connected to the connecting bar 9 so that the second rotating plate 42 is rotatable and the screen 10 is provided on the upper surface. .

The film 3 is fixed to the upper surface of the first rotating plate 32 as if supported by the column 36. The film 3 is substantially ring-shaped, and the image which image | photographed the external appearance and the cross section of the object at every predetermined angle along the circumferential direction is arranged sequentially. For example, if an image of a vase is rotated in the horizontal direction and photographed every 1 degree, the image is arranged in the film 3 in sequence. Alternatively, if the image and image are made every 1 degree while rotating the appearance and cross section of the three-dimensional graphic data (rendered CAD data) of the vase horizontally, 360 images are sequentially arranged on the film 3. The detailed structure regarding the film 3 is shown in FIG.

3 is a partially enlarged view of the film 3 and the film 3 shown in FIG. 2. As shown in FIG. 3, three columns 36 are formed below the ring-shaped film 3, and the film 3 itself is composed of a black mask 48 and an image 46.

The image 46 is a film obtained by photographing a cross section of an object to be output at a specific angle. For example, the image 46 may be a slide film or a movie film photographed every degree while rotating the cross section of an object called a vase in a horizontal direction. By arranging three films in the axial direction and changing the vertical position of the film by simple operation, three different objects (e.g., A1, A2, A3 are water bottles, B1, B2, B3 are cars, C1, C2 , C3 can display a mobile phone). In the embodiment of FIG. 3, only three image arrays are displayed, but five or more arrays may be arranged as necessary. Alternatively, when arranged as shown in FIG. 3 for continuous operation, simple moving picture reproduction can be performed.

The black mask 48 is provided between each image 46 and does not pass light at all. The black mask 48 is preferably made of the same material and size as the image 46, but preferably configured to completely block light. Since the black mask 48 functions as a shutter to completely block light when it comes to the center of the light source 1, the black mask 48 does not need to have a separate shutter device.

Hereinafter, an operation method of a volume image display device capable of radiation projection without a shutter device having the above configuration will be described in detail.

First, the film 3 is prepared by the following process. That is, 360 images 46 are prepared by photographing the object while changing the angle of the cross section of the object (for example, a water bottle) by one degree in the horizontal direction. The 360-degree image is prepared by taking every 1 degree while rotating the exterior and cross-section of the 3D graphic data (rendered CAD data) of the water bottle horizontally. After inserting a black mask 48 between each of the images 46, The film 3 is completed by connecting in a ring shape. When the finished film 3 is installed on the first rotating plate 32, the preparation for displaying the volumetric image is completed.

Light emitted from the light source 1 passes through the film 3 and then passes through the object lens 7. The light passing through the object lens 7 is collected in the first mirror 22, and the image reflected by the second mirror 22 is directed toward the third mirror 26 through the second mirror 24. The image reflected from the third mirror 26 is projected onto the screen 10.

At this time, the first motor 14 rotates the first rotating shaft 18 at a constant angular velocity, and due to the rotation of the first rotating shaft 18, the first mirror 22, the second mirror 24, and the third The mirror 26, the second rotating plate 42, the screen 10 and the connecting rod 9 are rotated at the same speed. Rotation of the connecting rod 9 means rotation of the light source 1 and the target lens 7 mounted on the connecting rod 9.

In addition, the second motor 12 rotates the second rotating shaft 20 at a constant angular speed through a gear train (not shown), and the first rotating plate 32 is integrally formed due to the rotation of the second rotating shaft 20. Will rotate. At this time, the rotation speed of the first rotation shaft 18 is about 600 rpm, and the rotation speed of the second rotation shaft 20 is about 0.5-10 rpm, which is lower than the rotation speed of the first rotation shaft 18. Rotation of the first rotating plate 32 causes the film 3 to rotate, thereby slowly rotating the projected volume image.

When the black mask 48 comes in front of the light source 1 due to the difference in the rotational speed of the film 3 and the rotational relative speed of the light source 1, the screen 10 darkens, and then the black mask 48 passes. The image is projected onto the screen 10 when the light source 1 is in front of the image 46. That is, the black mask 48 blocks an intermediate step due to the transfer of the image 46, and as the process is repeated, the image 46 and the black mask 48 (that is, the black screen) on the screen 10 are repeated. Will appear alternately. At this time, when the rotational speed of the film 3 and the relative rotational speed of the light source 1 are constantly synchronized, a three-dimensional volumetric image is displayed on the screen 10 by the afterimage effect of the eye. The circumferential length of the black mask 48 can be appropriately adjusted in consideration of the radius of rotation, the number of images, and the like.

Therefore, the observer around the cylindrical structure 30 can see the volumetric image of the object at any position. In an embodiment, the image projected on the screen 10 is displayed with a translucent stereoscopic volume image such as a semitransparent jellyfish swimming in the sea. Thus, the observer can see not only the appearance of the object but also the internal structure in three dimensions.

The first, second, and third mirrors 22, 24, and 26 of the present invention are positioned at right angles (beveled) to the screen 10 as relay mirrors, so that they are projected in a trapezoidal shape rather than a rectangle. Therefore, the Nearest-Neighbor deformation may be used to correct this into a quadrangle, and detailed parameters may be determined by trial and error or optically according to the projection position, size, angle, and the like.

In the embodiment, 200 slide films of about 9 mm x 9 mm were used, and the rotation speed of the screen was 600 rpm. In this case, the cylindrical structure 30 has a diameter of about 1 m, and has a radial resolution of 360 degrees / 200 = 1.8 degrees. In addition, 200 black masks were used to radially implement 200 slide films under such conditions.

Referring to FIG. 2, if the vertical position of the film 3 is to be changed, a pulse command is input to the vertical driving device 40. Then, the built-in stepping motor (not shown) or servomotor (not shown) rotates to rotate the pinion (not shown) to transfer the rack (not shown) of the column 36 in the vertical direction. The vertical conveyance of the column 36 leads to the conveyance of the film 3 and the vertical position of the film 3 placed before the light source 1 changes. Then, the image displayed on the screen 10 is changed to another object (for example, a water bottle to a car).

In the present invention, a slip ring (not shown) was used to supply electric power to the first rotating plate 32 and the connecting rod 9 in addition to the torque. Such a known slip ring has a structure capable of supplying a direct current power source or an alternating current power source on a rotating shaft.

In the present invention, three mirrors are used, but one, two or four, five or more may be selected and arranged according to the size of the cylindrical structure. In addition, the screen 10 may be made of a white fabric or may form a plurality of fine through holes on the surface in order to reduce the resistance of the air at high speed.

In addition, in the present invention, two motors are installed to use two rotation shafts, but the two rotation shafts may be simultaneously rotated at different speeds by generating torque reduced at different speeds from one motor. In addition, power transmission between the motor and the rotating shaft is also direct transmission, but may be applied using mechanical parts such as gear train, belt, and friction wheel.

In addition, weights can be installed on the connecting rod and the turntable to reduce vibration and noise caused by rotation.

If the screen is large (about 40 inches or more), in order to increase the rotational stability of the screen 10, the upper rotation center of the screen 10 may be supported by a bearing on the cylindrical structure 30, or a separate support frame It can also be supported by.

According to the volumetric image display apparatus capable of radiation projection without the shutter apparatus as described above, it is possible to display a three-dimensional volumetric image by projecting the image on a rotating screen without a separate shutter apparatus, and to achieve high quality and large size. Therefore, it can be widely used for commercial purposes such as various advertisements, academics, and presentations.

In addition, by arranging a plurality of images of different objects on the film, it is possible to easily change and display different images by controlling the position of the film. Therefore, it is possible to pursue a variety of displays, and to implement a simple video.

Then, by rotating the film in synchronization with the screen, there is an economical advantage that a sensor, a shutter device and an adjusting device for correcting the discrepancy of the rotational speed are unnecessary. In addition, there is an advantage that the imbalance of the rotational speed is not sensitive to the degradation of the image.

In the present invention, by directly projecting a high-quality image using a slide film can be used for large outdoor advertising.

In addition, the screen has a constant focal length by always keeping a constant distance from the film. Thus, there is no need for optical correction to focus. In addition, the conventional LCD or laser scanning method requires a sensor for precisely measuring the rotation speed because the position of the rotating body and the output image must be synchronized at all times. However, the present invention always provides a 1: 1 contrast between an image and a screen. As a result, the composition and distortion of the spatial image are not sensitive to the speed of the rotating body.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Accordingly, the appended claims will cover such modifications and variations as fall within the spirit of the invention.

Claims (5)

A connecting rod 9 rotatable about one end and having a first mirror 22 inclined at a predetermined angle on a rotation axis; A light source (1) installed at the other end of the connecting rod (9) for projecting light toward the first mirror (22); A target lens 7 installed between the light source 1 and the first mirror 22 of the other end of the connecting rod 9; It is rotatable integrally with the connecting rod 22, a second mirror 24 is provided on the rotation axis for reflecting the image reflected from the first mirror 22, the edge of the second mirror 24 A second rotating plate 42 having a third mirror 26 for reflecting the image reflected from the second mirror; A screen (10) installed on the rotation axis and rotatable integrally with the second rotating plate (42) and projecting an image reflected from the third mirror (26); A first rotating plate 32 installed below the rotating surface of the connecting rod 9 and rotatable independently of the connecting rod 9; And An image 46 installed in a ring shape on the first rotating plate 32 and positioned between the rotating light source 1 and the target lens 7 and capturing an external shape and a cross section of an object at predetermined angles in a radial direction. A volume image display device capable of radiation projection without a shutter device, characterized in that consisting of a film (3) provided with a black mask 48 that does not pass light between. The method of claim 1, The film 3 is installed at a position that can pass between the light source 1 and the target lens 7 on the first rotating plate 32, One end is connected to the target lens (7) bypasses the film (3) and the other end is provided with a cross bar (5) which can be connected to the light source (1) radiation projection without a shutter device Possible volumetric image display. The method of claim 1, A plurality of through holes 38 are formed in the first rotating plate 32, A plurality of columns 36 are further formed below the film 3 to be inserted into the through holes 38 and move in the axial direction. One side of the first rotating plate 32 further includes a vertical drive device 40 for controlling the axial position of the column 36, The film 3 is a volume image capable of radiation projection without a shutter device, characterized in that the film photographing different objects are connected in the axial direction, and projecting each object on the screen 10 according to the axial position. Display. The method according to claim 1 or 2, A first rotating shaft 18 formed on the rotation center of the connecting rod 9; A first motor (14) for rotating the first rotating shaft (18); A hollow second rotation shaft 20 installed on the rotation center of the first rotation plate 32 and through which the first rotation shaft 18 passes; And And a second motor (12) for rotating the second rotating shaft (20). The method of claim 4, wherein A cylindrical base 28 provided with the first rotating plate 32 and the first and second motors 14 and 12; And Is connected to the base 28, the transparent cylindrical structure 30 to form a space for rotating the screen 10 therein; Volume projection image display capable of radiation projection without a shutter device further comprises a Device.