JPH06265818A - Spectacle-less three-dimensional image display device - Google Patents

Abstract

PURPOSE:To provide the spectacle-less three-dimensional image display device which can reproduces a stereoscopic image with high resolution. CONSTITUTION:The spectacle-less three-dimensional image display device is equipped with plural liquid crystal projectors 9 and 10 which are arranged vertically or horizontally at a proper interval, and one diffusion plate 11 and one lenticular lens 12; and the liquid crystal projectors 9 and 109 are provided without overlapping with pixels projected by the opposite liquid crystal projectors 9 and 10 on a diffusing plate 11 so as to project pixels on black matrix parts between pixels projected by the opposite liquid crystal projectors 9 and 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device without glasses 3 for viewing a three-dimensional image without using special glasses.
The present invention relates to a three-dimensional image display device.

[0002]

2. Description of the Related Art A conventional three-dimensional image display device without glasses is
Taking the case of the two-lens type as an example, as shown in FIG. 8, for example, the signals obtained from the left-eye camera 13 and the right-eye camera 14 are combined by the signal combining circuit 15 to form a combined signal. An image is formed on the basis of the projection device 16 based on the projection device 16 and the vertical stripe-shaped pixels of the left and right images are alternately arranged and projected on the diffusion plate 17 to form a lenticular lens 18.
The image is configured to be viewed by the left eye L and the right eye R via the.

One on the diffusion plate 17 which is a pair of two projected pixels
Accurate correspondence between the pitch and one pitch of the lenticular lens, and at a position apart from the screen by an appropriate viewing distance determined by the design value of the lenticular lens, the distance between the left eye image and the right eye image is about 65 mm. 3D images can be perceived when they are placed alternately and viewed with the left-eye image with the left eye and the right-eye image with the right eye. (1990 21st Image Engineering Conference 40 inch LCD projection type stereoscopic TV display without glasses P213-216, and
1992, SPIE Vol. 1669, 50-in
chAutostereoscopic Full-c
color 3-D Television Displ
(See ay System).

[0004]

SUMMARY OF THE INVENTION No conventional glasses 3
Since the three-dimensional image display device forms an image with one projection device 16 and projects it on the diffusion plate 17, there is a problem that the resolution decreases in inverse proportion to the number of viewpoints.

For example, even in a liquid crystal projector using a high-definition LCD panel having horizontal 1440 × vertical 1024 pixels, one projector 16 is used to provide 2 pixels.
When an eye-type stereoscopic display is realized, a left-eye image and a right-eye image are alternately projected on the diffuser plate as shown in FIG. 9, and 1440 pixels in the horizontal direction are displayed on the diffuser plate as shown in FIG. Since it is necessary to divide the pixels into 720 pixels for the left eye, only a stereoscopic image of 720 pixels for one eye can be reproduced.

Further, as shown in FIG. 11, when the four cameras 13, 13, ′, 14, and 14 ′ are used for the four-lens type, only 360 pixels are assigned to the image of each viewpoint, so that the image quality is improved. Deterioration becomes more noticeable

The first three-dimensional image display device without glasses of the present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a three-dimensional image display device without glasses capable of reproducing stereoscopic images with high resolution. To aim.

In the conventional three-dimensional image display device without glasses, the signal processing method of image data and the number of viewpoints are fixed.
The TSC system cannot support the high definition system,
Even if the same signal processing method is used, it cannot be applied when the number of viewpoints is different.

The second glasses-free three-dimensional image display device of the present invention has been made in view of the above-mentioned circumstances. In the first glasses-free three-dimensional image display device of the present invention, a plurality of display modes, That is, it is an object of the present invention to provide a three-dimensional image display device without glasses that can reproduce a stereoscopic image in which one or both of the signal processing method of image data and the number of viewpoints are different.

Further, in the conventional three-dimensional image display device without glasses, for example, a liquid crystal projector which originally has a sufficient resolution for displaying a two-dimensional image of a high-definition system (in this case, an LCD panel of 1440 horizontal × 1024 vertical) is used. Even when using, when viewed through the lenticular lens, the number of pixels in the horizontal direction decreases corresponding to the pitch number of the lenticular lens, and deterioration of image quality cannot be avoided.
In order to view a high-definition high-definition image, it is necessary to replace the diffuser plate and the lenticular lens with a screen for a normal rear projector for displaying a two-dimensional image.

The third glasses-free three-dimensional image display device of the present invention has been made in view of the above circumstances, and the first glasses-less three-dimensional image display device of the present invention reproduces a three-dimensional image. It is an object of the present invention to provide a three-dimensional image display device without glasses that can reproduce a two-dimensional image without lowering the resolution by using a projection device and a screen capable of performing the above.

In addition, a black matrix is formed on the liquid crystal panel used in the liquid crystal projector to prevent the transmission of unnecessary light.

Therefore, effective pixel components are imaged in a grid pattern on the diffusion plate as shown in FIG.

For example, as shown in FIG. 13, when the pixel pitch in the horizontal direction is P and the effective dimension in the horizontal direction of each pixel is A,
The aperture ratio in the lateral direction is (A / P) × 100 (%). For example, if the aperture ratio (horizontal direction) is 60% and the pixel pitch between both eyes is 65 mm, it depends on the main lobe, as shown in FIG. The stereoscopic viewable range is ± 19.5m from the center
m, the intensity distribution of the light is as shown in FIG. 14, and the condensed state of the pixels and the plaque matrix at the observation position is as shown by 51 in the figure.

In this case, when the viewpoint is moved, in addition to the stereoscopic viewing state, there is a pseudo-viewing state and a state where the image cannot be seen due to the influence of the black matrix portion.

The fourth glasses-free three-dimensional image display device of the present invention has been made in view of the above circumstances, and in the first glasses-free three-dimensional image display device of the present invention, a liquid crystal panel of a liquid crystal projector. The influence of the black matrix part of is eliminated and the range that can be viewed stereoscopically is expanded.
The purpose is to achieve high brightness.

[0017]

A first three-dimensional image display device without glasses according to the present invention is provided with a plurality of liquid crystal projectors arranged at appropriate intervals in the up-down direction or the left-right direction, and a diffusion of each one surface. In a three-dimensional image display device without glasses including a plate and a lenticular lens, the following measures are taken to achieve the above object. That is,
It is characterized in that each liquid crystal projector is provided on the diffusion plate so as to project pixels on a black matrix portion between pixels projected by other liquid crystal projectors.

Further, the second eyeglasses-free three-dimensional image display device of the present invention adopts the following means in order to achieve the above object in the first eyeglasses-free three-dimensional image display device of the present invention. ing. That is, an input unit for selectively inputting three-dimensional image data of a plurality of display systems, and a control device for selecting the input display system and the output display system corresponding thereto are provided.

Further, the third spectacles-free three-dimensional image display device of the present invention adopts the following means in order to achieve the above object in the first spectacles-free three-dimensional image display device of the present invention. ing. That is, an input unit for selecting and inputting a three-dimensional image signal and a two-dimensional image signal, and an image signal input to a plurality of liquid crystal projectors corresponding to the image signals input to the input unit are the two-dimensional image signal and the three-dimensional image signal. It is characterized in that a signal switching means for switching to an image signal is provided.

In addition, the fourth glasses-free three-dimensional image display device of the present invention includes the following means in order to achieve the above object in the first glasses-free three-dimensional image display device of the present invention. I am taking it. That is, when the size of the black matrix portion of each liquid crystal panel is shorter than that pixel, when each liquid crystal projector inputs the same signal to the corresponding pixel, the same signal of the corresponding other liquid crystal projector on the diffuser plate is input. It is characterized by comprising fine adjustment means for finely adjusting the position of each liquid crystal projector so as to project the pixels wholly or partly on the portion where the pixels are projected.

[0021]

In the first three-dimensional image display device without glasses of the present invention, the pixels projected from the plurality of liquid crystal projectors are projected on the black matrix portion of the other liquid crystal projectors on the diffuser plate, so Pixels do not overlap on the diffusion plate as in the case of overlapping projection,
The image observed through the lenticular lens is not a double image but is accurately inserted (interleaved) in the black matrix portion, and the number of pixels for each viewpoint is not reduced in inverse proportion to the number of viewpoints, resulting in good separation. 3D video is reproduced.

In the second three-dimensional image display device without glasses of the present invention, the control device causes the output display system to correspond to the display system of the three-dimensional image data input to the input section. Therefore, three-dimensional images of a plurality of display methods can be selectively reproduced.

In the third three-dimensional image display device without glasses of the present invention, the image signals input to the plurality of liquid crystal projectors corresponding to the image signals input to the input section by the signal switching means are three-dimensional image signals and three-dimensional image signals. Since it is switched to the two-dimensional image signal, the two-dimensional image without parallax and the three-dimensional image with parallax projected from each liquid crystal projector on the diffusion plate can be selectively projected and reproduced.

In the fourth third three-dimensional image display device without glasses of the present invention, the position of each liquid crystal projector is finely adjusted by the fine adjustment means, so that each liquid crystal projector can output the same signal to the corresponding pixels. When entering
Since the pixels are projected wholly or partly on the portion where the pixels of the same signal of other corresponding liquid crystal projectors are projected on the diffusion plate, the influence of the black matrix of each liquid crystal projector is eliminated from each other. Therefore, the influence can be eliminated, and the stereoscopically visible range is expanded and the brightness is increased.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The following is a detailed description of a three-dimensional image display device without glasses according to an embodiment of the present invention with reference to the drawings.

This three-dimensional image display device without glasses is shown in FIG.
As shown in, NT obtained from eight NTSC camera 1 or eight NTSC video tapes 2
The control device is configured to reproduce an SC type 3D image, a HDV type 3D image obtained from two HDTV type cameras 4 and 5, or a 2D image obtained from a HDV type video tape 6. 8
Is used to select one of the display methods.

The components necessary for reproducing a three-dimensional image by using two of the eight NTSC cameras 1 in FIG. 1 are shown in FIG. 2, and the camera 1 for the right eye is shown. The three-dimensional image signal obtained by the above is input to the liquid crystal projector 9 for the right eye, and the three-dimensional image signal obtained by the camera 1 for the left eye is input to the liquid crystal projector 10 for the left eye, and is simultaneously irradiated on the diffusion plate 11. It

As shown in the schematic view of FIG. 3A, the image projected by the left-eye liquid crystal projector 10 is projected to the left of the screen, and as shown in the schematic view of FIG. 3B, the right-eye liquid crystal projector. The image projected by 9 is projected to the right of the screen. The liquid crystal projectors 9 and 10 are arranged so that the pixels of these projected images are projected on the black matrix portion of the other projected image without overlapping with each other.

As a result, the projected images of both liquid crystal projectors 9 and 10 synthesized on the diffusion plate 11 are synthesized images in which the other pixel is inserted (interleaved) in the black matrix portion as shown in FIG. 3C. Becomes

As shown in FIG. 1, a lenticular lens 12 is arranged on the front surface of the diffusing plate 11, and one pitch of the lenticular lens 12 corresponds to one pitch on the diffusing plate 11 having two projection pixels as a pair. By making an accurate correspondence, the left-eye image and the right-eye image are separated from each other by a distance (about 65) between the left-eye image and the right-eye image at a position separated from the lenticular lens 12 by an appropriate viewing distance.
mm) are placed alternately, and a 3D image can be perceived when the left-eye image is viewed by the left eye and the right-eye image is viewed by the right eye.

The components necessary for reproducing a four-lens type three-dimensional image by using four of the eight NTSC type cameras 1 in FIG. 1 are shown in FIG. 3D image data of even-numbered (second and fourth) cameras 1b and 1d from the bottom of the cameras 1 of FIG. 1 are input to one projector 9 in parallel or sequentially, and odd-numbered (1 The three-dimensional image data of the first and third cameras 1a and 1c are input to the other projector 10 in parallel or sequentially.

Then, the two-dimensional images of the second and fourth cameras 1b and 1d are alternately projected on the diffusion plate 11 for each pixel from one liquid crystal projector 9 and the first and third ones from the other liquid crystal projector 10. The two-dimensional images of the second cameras 1a and 1c are alternately projected onto the diffusion plate 11 for each pixel.

Here, in the black matrix portion of the other liquid crystal projector 10 formed between the pixel of the first camera 1a and the pixel of the third camera 1c, the pixel of the second camera 1b is the third camera. The pixel of the fourth camera 1d is projected on the black matrix portion of the other liquid crystal projector 10 formed between the pixel of 1c and the pixel of the next first camera 1a.

By accurately associating one pitch on the diffusing plate 11 having each pixel of each of the first to fourth cameras 1 as one set with one pitch of the lenticular lens 12, the lenticular lens 12 can be adapted to a suitable one. A left-eye image and a right-eye image alternately appear at a distance from each other with a distance between both eyes, and a three-dimensional image can be perceived when viewing the left-eye image with the left eye and the right-eye image with the right eye.

When the observer moves his or her viewpoint, three-dimensional images with different viewpoints can be perceived one after another, and a highly realistic four-lens type three-dimensional image which cannot be obtained by the twin-lens type is reproduced.

The same applies to the case of the 6-lens type and 8-lens type, and the pixels of the images of the even-numbered camera 1 and the images of the odd-numbered camera 1 are not overlapped with each other from the two liquid crystal projectors 9 and 10. By arranging the liquid crystal projectors 9 and 10 so as to project the images on the black matrix portions of the other liquid crystal projectors 9 and 10, it is possible to reproduce a multi-view three-dimensional image having a higher sense of presence. it can.

When reproducing a three-dimensional image from a plurality of videotapes 2 in which video images taken simultaneously by cameras having different fields of view are stored, a video recording / reproducing device may be connected to each liquid crystal projector 9 or 10 instead of the camera 1. Good.

When reproducing a three-dimensional image obtained from two high-definition type cameras 4 and 5, the video signal switcher 7 is switched to the high-definition camera side and the two NTSC type cameras 1 described above are used. A high-definition twin-lens stereoscopic image can be obtained in the same manner as when reproducing a stereoscopic image.

When reproducing the two-dimensional image obtained from the video tape 6, the two-dimensional image signal reproduced from the video tape 6 is divided into two by the distributor 7.
It is inputted to the two liquid crystal projectors 9 and 10 via the video signal switcher 3 in the same manner as in the case of the high-vision twin-lens three-dimensional image selected by the control device 8.

Both liquid crystal projectors 9 and 10 irradiate the same image on the diffusion plate 11, and a composite image is formed on the diffusion plate 11. The left and right pixels forming a pair of the composite image are illuminated with the same image by the pixels of the liquid crystal projector 10 for the left eye on the portion where the black matrix of the liquid crystal projector 9 for the right eye is illuminated, and are observed through the lenticular lens 12.

As shown in FIG. 2, for example, pixels for illuminating the diffuser plate 11 for the right eye and the pixels for the left eye are alternately arranged. The pixels adjacent to each other corresponding to each pitch of the lenticular lens 12 are arranged. Since the formed pixels display the image of the same signal, these paired pixels are observed as if they were one pixel, and as a result, the image observed through the lenticular lens 12 is a two-dimensional image. Therefore, it is not necessary to replace the diffuser plate 11 and the reticular lens 12 with an ordinary transmissive screen for liquid crystal projectors, and it becomes possible to freely select and view secondary and three-dimensional high-definition images.

In each of the above-described embodiments, it is premised that the pixels of each liquid crystal projector are projected on the diffusion plate 11 in a size smaller than the size of the black matrix portion. It can also be applied to the case where the image is projected on the plate 11 to be larger than the size of the black matrix portion.

That is, in another embodiment of the present invention, FIG.
As shown in FIG. 3, the pixels R and L of one liquid crystal projector and the pixels R ′ and L ′ of the other liquid crystal projector are
Is projected to a size larger than the size of the black matrix portion of each projector (corresponding to P-A in FIG. 13). In this case, each liquid crystal projector has the same pixels R and R ', L and L'corresponding to each other. When inputting a signal, the pixel R of the same signal of the corresponding other liquid crystal projector on the diffusion plate
Fine adjustment means is provided for finely adjusting the position of each liquid crystal projector so as to project the pixels wholly or partially overlap the portions where R and R ′ and L and L ′ are projected.

The fine adjustment means may be constituted so that the positions of the one or the other liquid crystal projectors 9 and 10 can be finely adjusted in the XY directions, and can be constituted by, for example, an XY table.

The same two-lens type three-dimensional image signal is given to the two liquid crystal projectors 9 and 10, and as shown in the schematic diagram of FIG. For example, the liquid crystal projector 10 is moved in the horizontal direction by the fine adjustment unit so that the left and right images do not overlap the projected images R ′ and L ′ of the projector. That is,
In order to prevent the image R and the image L ′ or the image R ′ and the image L from overlapping with each other, a part of the corresponding other liquid crystal projector 9 or 10 on which a pixel of the same signal is projected is partially projected on the diffusion plate 11. The left and right positions of the liquid crystal projector 10 are finely adjusted by the fine adjustment means so that the pixels are superimposed and projected.

As a result, as shown in FIG. 6, the influence of the black matrix can be reduced in the horizontal direction, and in the optimum state, the influence of the black matrix can be eliminated.

Here, for example, the lateral aperture ratio is 60%,
If the interocular distance is set to 65 mm, the stereoscopically visible range by the main lobe is ± 32.5 mm at the center, as shown in the schematic diagram of FIG. 7, which is enlarged compared to the case shown in FIG. The spectral intensity of this light is as shown by 52 in the same figure, and the influence of the black matrix portion is eliminated by the pixels which are projected so as to be superimposed on it, so that a high-luminance image as a whole can be obtained.

[0048]

As described above, according to the first three-dimensional image display device without glasses of the present invention, the pixels projected from the liquid crystal projector onto the diffuser plate are changed to the pixels projected from other liquid crystal projectors. Since it is provided so that pixels are projected on the black matrix portion between pixels projected by other liquid crystal projectors without overlapping, it is not necessary to allocate the number of pixels appearing on the screen to each viewpoint. The number of pixels that can be projected by each liquid crystal projector can be increased to the number of pixels, and a stereoscopic image with high resolution can be reproduced.

According to the second glasses-free three-dimensional image display device of the present invention, in the first glasses-free three-dimensional image display device of the present invention, the three-dimensional image data of a plurality of display methods are input. Since the input unit and the control device for selecting the input display system and the corresponding output display system are provided, in addition to the effect of the first glasses-free three-dimensional image display device of the present invention, one glasses-less system is provided. The three-dimensional image display device can display a plurality of types of three-dimensional images corresponding to one or both of the signal processing method of the stereoscopic image input to the input unit and the number of input viewpoints.

Further, according to the third glasses-free three-dimensional image display device of the present invention, in the first glasses-less three-dimensional image display device of the present invention, the three-dimensional image signal and the two-dimensional image signal are selected. Since the input section for inputting the input signal and the signal switching means for switching the image signal input to the plurality of liquid crystal projectors to the two-dimensional image signal and the three-dimensional image signal corresponding to the image signal input to the input section are provided. In addition to the effect of the first three-dimensional image display device without glasses according to the present invention, the diffuser plate and the lenticular lens on which an image is projected from the liquid crystal projector are not replaced with a screen for a two-dimensional image,
A two-dimensional image and a three-dimensional image can be selectively reproduced with a single three-dimensional image display device without glasses. In particular, when the third glasses-free three-dimensional image display device of the present invention is applied to a high-definition high-definition system, it is possible to view a high-quality two-dimensional image without degrading the image quality, which is advantageous. Become.

In addition, according to the fourth three-dimensional image display device without glasses of the present invention, in the first three-dimensional image display device without glasses of the present invention, the black matrix portion of each liquid crystal panel is formed from its pixel. When the liquid crystal projectors input the same signal to pixels corresponding to each other, when the liquid crystal projectors are short, wholly or partly on the portion where the pixels of the same signal of the corresponding other liquid crystal projectors are projected on the diffusion plate. Since fine adjustment means for finely adjusting the position of each liquid crystal projector to superimpose pixels is provided, the influence of the black matrix can be eliminated, the stereoscopic viewable range can be expanded, and a high-luminance image as a whole can be displayed. You will be able to appreciate it.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a configuration diagram of a part necessary for reproducing a binocular stereoscopic image according to an embodiment of the present invention.

FIG. 3 is a schematic diagram showing an image formation state of pixels on a diffusion plate according to an embodiment of the present invention.

FIG. 4 is a configuration diagram of a part necessary for reproducing a four-eye stereoscopic image according to an embodiment of the present invention.

FIG. 5 is a schematic view showing an image formation state of pixels on a diffusion plate according to another embodiment of the present invention.

FIG. 6 is an enlarged view of a portion of FIG.

FIG. 7 is a schematic view showing a state of light rays condensed from a diffusion plate of another embodiment of the present invention at a proper viewing position.

FIG. 8 is a configuration diagram of a conventional example capable of reproducing a binocular stereoscopic image.

FIG. 9 is a schematic diagram of an image of a conventional example appearing on a diffusion screen.

FIG. 10 is a schematic diagram showing a problem of a conventional example capable of reproducing a binocular stereoscopic image.

FIG. 11 is a schematic diagram showing a problem of a conventional example capable of reproducing a four-eye type stereoscopic image.

FIG. 12 is a schematic diagram showing an image formation state of pixels on a diffusion plate of a conventional example.

FIG. 13 is an enlarged schematic view of a part of FIG.

FIG. 14 is an explanatory diagram showing another problem of the conventional example.

[Explanation of symbols]

 1 Camera 2 Video Tape 3 Video Signal Switcher 4, 5 Camera 6 Video Tape 7 Distributor 8 Control Device 9, 10 Liquid Crystal Projector 11 Diffuser 12 Lenticular Lens

Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI Technical display location G03B 35/20 7256-2K 35/24 7256-2K (72) Inventor Daisuke Takemori 2 Keihanhondori, Moriguchi-shi, Osaka Chome 18 Sanyo Denki Co., Ltd. (72) Inventor Hideyuki Kanayama 2-18 Keihan Hondori, Moriguchi City, Osaka Prefecture Sanyo Denki Co., Ltd. (72) Kazuhiro Arai 2-18 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.

Claims (4)

[Claims] 1. A pair of liquid crystal projectors arranged at appropriate intervals in the up-down direction or the left-right direction, a diffuser plate and a lenticular lens each having one surface, and no glasses 3
In a three-dimensional image display device, each liquid crystal projector is provided on a diffusion plate so as to project pixels on a black matrix portion between pixels projected by another liquid crystal projector without overlapping pixels projected by another liquid crystal projector. A three-dimensional image display device without glasses, which is characterized in that 2. An input unit for inputting three-dimensional image data of a plurality of display systems, and a control device for selecting the input display system and the output display system corresponding thereto are provided. The described three-dimensional image display device without glasses. 3. An input unit for selecting and inputting a three-dimensional image signal and a two-dimensional image signal, and an image signal input to a plurality of liquid crystal projectors corresponding to the image signal input to the input unit is a two-dimensional image signal. 2. The three-dimensional image display device without glasses according to claim 1, further comprising signal switching means for switching between the three-dimensional image signal and the three-dimensional image signal. 4. When the size of the black matrix portion of each liquid crystal panel is shorter than that pixel, when each liquid crystal projector inputs the same signal to corresponding pixels,
Fine adjustment means for finely adjusting the position of each liquid crystal projector so that the pixel is projected wholly or partially superposed on the portion of the corresponding other liquid crystal projector where the pixel of the same signal is projected on the diffusion plate. 1. The method according to claim 1, further comprising:
A three-dimensional image display device without glasses as set forth in.