JP3323575B2 - 3D image display without glasses - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spectacleless camera for viewing three-dimensional images without using special spectacles.
The present invention relates to a two-dimensional image display device.

[0002]

2. Description of the Related Art A conventional three-dimensional image display apparatus without glasses is
For example, as shown in FIG. 8, a signal obtained from a camera 13 for the left eye and a camera 14 for the right eye is synthesized by a signal synthesizing circuit 15 to obtain a synthesized signal. An image is formed by the projection device 16 based on the lenticular lens 18, and the vertical stripe-shaped pixels of the left and right images are alternately arranged for each pixel and projected onto the diffusion plate 17.
Through the left eye L and the right eye R.

[0003] 1 on the diffusion plate 17 in which two projection pixels are paired
The pitch and one pitch of the lenticular lens are made to correspond exactly, 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 (about 65 mm) is increased. placed appear alternately, the left-eye image with the left eye, Ru can 3D image is perceived when you watch the right-eye image with the right eye (21st image Engineering Conference 40-inch LCD projection without glasses 1990 three-dimensional TV display P213-216 And 19
1992, SPIE Vol. 1669, 50-inch
Autostereoscopic Full-col
or 3-D Television Display S
system).

[0004]

SUMMARY OF THE INVENTION
Since the one-dimensional image display device forms an image with one projection device 16 and projects the image on the diffusion plate 17, there is a problem that the resolution is reduced in inverse proportion to the number of viewpoints.

For example, in a liquid crystal projector using a high-vision LCD panel having 1440 pixels × 1024 pixels, a single projector 16
When realizing an eye-type stereoscopic display, a left-eye image and a right-eye image are alternately projected on the diffusion plate as shown in FIG. 9, and 1440 pixels in the horizontal direction are 720 pixels for the right eye as shown in FIG. Since it is necessary to sort 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 a four-lens camera is used by using four cameras 13, 13 ', 14, and 14', only 360 pixels are assigned to each viewpoint image, so Deterioration becomes more pronounced

[0007] The three-dimensional image display device without glasses according to the present invention comprises:
The present invention has been made in view of the above circumstances, and has as its object to provide a three-dimensional image display device without glasses that can reproduce a high-resolution stereoscopic image.

In the conventional three-dimensional image display apparatus without glasses, the signal processing method and the number of viewpoints of image data are fixed.
The TSC system cannot support the Hi-Vision system,
Even in the case of the same signal processing method, it is impossible to cope with a case where the number of viewpoints is different.

A three-dimensional image display device without glasses according to the present invention comprises:
The present invention has been made in view of the above circumstances, and in the three-dimensional image display device without glasses of the present invention, a plurality of display methods, that is, a three-dimensional image in which one or both of the signal processing method of image data and the number of viewpoints are different. It is an object of the present invention to provide a three-dimensional image display device without glasses that can reproduce.

Further, in a conventional three-dimensional image display device without glasses, for example, a liquid crystal projector having a resolution sufficient for displaying a two-dimensional image originally in a high-vision system (in this case, an LCD panel of 1440 horizontal × 1024 vertical) is used. When viewing through a lenticular lens , the number of pixels in the horizontal direction decreases corresponding to the number of pitches of the lenticular lens , and image quality degradation cannot be avoided. For this purpose, it is necessary to replace the diffusion plate and the lenticular lens with a screen for a rear type projector for displaying an ordinary two-dimensional image.

The three-dimensional image display device without glasses according to the present invention comprises:
It was made in view of the above circumstances, and the first aspect of the present invention.
In a three-dimensional image display device without glasses, an object of which is 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 that can reproduce a three-dimensional image and a screen. And

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

For this reason, 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 of the transverse (A / P) × a 100 (%), for example, the opening ratio (transverse) 60%, as shown in FIG. 14 when the pixel pitch binocular pupil distance and 65 mm, main Inrobu Range is ± 19.5 from center
mm, and the light intensity distribution is as shown in FIG. 14, and the light condensing state of the pixels and the black matrix at the observation position is as shown by 51 in FIG.

In this case, when the viewpoint is moved, there are a stereoscopic state, a reverse viewing state, and a state in which an image cannot be seen due to the influence of the black matrix portion.

The three-dimensional image display device without glasses according to the present invention comprises:
It was made in view of the above circumstances, and the first aspect of the present invention.
In the three-dimensional image display device without glasses, an effect of a black matrix portion of a liquid crystal panel of a liquid crystal projector is eliminated, and a range in which a stereoscopic view is possible is enlarged, and high luminance is achieved.

[0017]

SUMMARY OF THE INVENTION A three-dimensional image display apparatus without glasses according to the present invention comprises two liquid crystal projectors arranged at appropriate intervals in the vertical and horizontal directions and one for each.
Surface with a diffuser and a lenticular lens .
The right-eye and left-eye pixels of the LCD projector
Projection with right-eye and left-eye pixels of a liquid crystal projector
Each pixel size of the image is
Eyeglasses larger than the size of the projected image of the rack matrix part
None In the three-dimensional image display device, one of the liquid crystal
To throw a shadow image of Kuta, the right-eye pixels and the left-eye pixels heavy
Give two LCD projectors so that they do not overlap
The same signal is given in the same three-dimensional image data.
Where right-eye pixels and left-eye pixels are projected
And a fine adjustment means for finely adjusting the position of each liquid crystal projector so that the liquid crystal projector is partially superimposed and projected on the diffusion plate .

The three-dimensional image display apparatus without glasses of the present invention selects an input unit for selectively inputting three-dimensional image data of a plurality of display methods, and selects a display method to be input and an output display method corresponding thereto. A control device can be provided.

Further, the three-dimensional image display device without glasses of the present invention has an input section for selecting and inputting a three-dimensional image signal and a two-dimensional image signal, and a plurality of input sections corresponding to the image signals input to the input section. Signal switching means for switching an image signal input to the liquid crystal projector between a two-dimensional image signal and a three-dimensional image signal can be provided.

[0020]

In the three-dimensional image display device without glasses according to the present invention, the position of each liquid crystal projector is finely adjusted by the fine adjustment means, so that the projected image of one of the liquid crystal projectors can be adjusted.
In contrast, the right-eye and left-eye pixels do not overlap
The same three-dimensional image given to two LCD projectors
Pixels for the right eye to which the same signal is given in the image data
The part where the image and the left-eye pixel are projected is
Since the projections are partially superimposed on each other, the effects of the black matrix of each liquid crystal projector can be eliminated and eliminated, and the range that can be viewed stereoscopically is expanded, and the brightness is reduced. Enhanced.

In the three-dimensional image display device without glasses according to the present invention, the control device sets the output display method to correspond to the display method of the three-dimensional image data input to the input unit. Can be selectively reproduced.

In the three-dimensional image display device without glasses according to the present invention, the signal switching means converts the image signals input to the plurality of liquid crystal projectors into two corresponding to the image signals input to the input unit.
Since switching is performed between the two-dimensional image signal and the three-dimensional image signal, it is possible to selectively project and reproduce a two-dimensional image having no parallax and a three-dimensional image having parallax projected from each liquid crystal projector onto the diffusion plate.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A three-dimensional image display apparatus without glasses according to one embodiment of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, a three-dimensional image display device without glasses, which is a premise of the present invention, is a three-dimensional NTSC camera 3 obtained from eight NTSC cameras 1 or eight NTSC video tapes 2. A three-dimensional image obtained from two high-vision cameras 4 and 5 or a two-dimensional image obtained from a high-definition video tape 6 can be reproduced. Is selected.

In FIG. 1, the components necessary for reproducing a three-dimensional image using two of the eight NTSC cameras 1 are shown in FIG. 2, and the right-eye camera 1 is shown in FIG. 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. You.

As shown in the schematic diagram 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 diagram of FIG. 9 is projected to the right of the screen. The two liquid crystal projectors 9 and 10 are arranged such that the pixels of these projected images are projected on the black matrix portion of the other projected image without overlapping each other.

As a result, the projected images of the two liquid crystal projectors 9 and 10 combined on the diffusion plate 11 are combined images in which the other pixels are inserted (interleaved) into the black matrix portion as shown in FIG. Becomes

As shown in FIG. 1, a lenticular lens 12 is disposed in front of the diffusion plate 11, and one pitch of the lenticular lens 12 is equal to one pitch on the diffusion plate 11 in which two projection pixels are paired. By accurately associating, the left-eye image and the right-eye image are separated from each other by a distance (approximately 65
mm), the three-dimensional image can be perceived when the left-eye image is viewed with the left eye and the right-eye image is viewed with the right eye.

FIG. 4 shows components required for reproducing a four-lens three-dimensional image using four of the eight NTSC cameras 1 in FIG. The three-dimensional image data of even-numbered (second and fourth) cameras 1b and 1d from the bottom of the camera 1 is input to one projector 9 in parallel or sequentially, and the 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 two-dimensional images are projected from the other liquid crystal projector 10. The two-dimensional images of the cameras 1a and 1c are alternately irradiated on 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 connected to 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 next pixel of the first camera 1a.

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

When the observer moves the viewpoint, three-dimensional images with different viewpoints can be perceived one after another, and a four-eye three-dimensional image with a high sense of reality that cannot be obtained with the two-eye system is reproduced.

The same applies to the case of the six-lens system and the eight-lens system, and the pixels of the even-numbered camera 1 and the odd-numbered camera 1 are not sequentially overlapped from the two liquid crystal projectors 9 and 10. By arranging the liquid crystal projectors 9 and 10 so that the images are projected 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 with a higher sense of reality. it can.

In order to reproduce a three-dimensional image from a plurality of video tapes 2 storing video images taken simultaneously by cameras having different fields of view, a video recording / reproducing apparatus is connected to each of the liquid crystal projectors 9 and 10 instead of the camera 1. I just need.

In order to reproduce a three-dimensional image obtained from the two high-vision cameras 4 and 5, the video signal switcher 7 is switched to the high-vision camera, and the two NTSC cameras 1 are used. In the same manner as in the case of reproducing a reproduced stereoscopic image, a twin-lens stereoscopic image of the Hi-Vision system can be obtained.

When a two-dimensional image obtained from the video tape 6 is reproduced, the two-dimensional image signal reproduced from the video tape 6 is distributed by the distributor 7 into two signals.
The signals are input 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 binocular three-dimensional image selected by the control device 8.

The liquid crystal projectors 9 and 10 irradiate the same image to the diffusion plate 11, and a composite image is formed on the diffusion plate 11. The left and right pixels forming the pair of the composite image are irradiated 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 irradiated, and are observed through the lenticular lens 12.

The pixels illuminated on the diffusion plate 11 are arranged alternately for the right eye and the left eye, as shown in FIG. 2, for example. Since the pixels forming the same display an 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 diffusion plate 11 and the reticular lens 12 with a normal transmission screen for a liquid crystal projector, and it is possible to freely select and view secondary and three-dimensional high-vision images.

In the above example, it is assumed that the pixels of each liquid crystal projector are projected onto the diffusion plate 11 in a size smaller than the size of the black matrix portion. It can also be applied to a case where the projection is larger than the size of the black matrix portion.

That is, in the embodiment of the present invention, as shown in FIG. 5, pixels R (first pixel) and L (second pixel) of one liquid crystal projector and pixels R ′ and L ′ is projected onto the diffusion plate 11 larger than the size of the black matrix portion of each projector (corresponding to PA in FIG. 13). In this case, each liquid crystal projector has pixels R and R ′, L corresponding to each other. When the same signal is input to the diffusion plate, the pixels R and R 'and L and L' of the same signal of the corresponding other liquid crystal projector are entirely or partially projected on the diffusion plate. Fine adjustment means for finely adjusting the position of each liquid crystal projector so as to project pixels in a superimposed manner is provided.

The fine adjustment means only needs to be capable of finely adjusting the position of one or the other of the liquid crystal projectors 9 and 10 in the X and Y directions, and can be formed of, for example, an XY table.

The same two-lens three-dimensional image signal is given to the two liquid crystal projectors 9 and 10, and as shown in the schematic diagram of FIG. The left and right images do not overlap the projected images R ′ and L ′ of the projector
0 is moved in the horizontal direction by the fine adjustment means. That is, in order to prevent the image R and the image L 'or the image R' and the image L from overlapping each other, a portion of the corresponding liquid crystal projector 9 or 10 corresponding to the same signal pixel is projected on the diffusion plate 11. Liquid crystal projector 10
Fine adjustment of the left and right positions by fine adjustment means.

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

Here, for example, the aperture ratio in the horizontal direction is 60%,
Assuming that the distance between the eyes is 65 mm, as shown in the schematic diagram of FIG. 7, the stereoscopic visible range of the main lobe is ± 32.5 mm at the center, which is larger than that 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 superimposed and projected thereon, so that a high-luminance image can be obtained as a whole.

[0046]

As described above, the eyeglasses of the present invention
According to the three-dimensional image display device, each of the liquid crystal projectors
The size of the projected image of the pixel is
If the size of the projected image is larger than
Pixel for the right eye with respect to the projected image of
Make sure that two LCD monitors are
Same in the same three-dimensional image data given to the ejector
Pixels for the right eye and pixels for the left eye
Are partially superimposed on the diffuser
Finely adjust the position of each LCD projector so that
The fine adjustment means eliminates the influence of the black matrix and expands the stereoscopic viewable range.
As a whole, a high-luminance image can be viewed.

Also, the present invention provides one input unit for inputting three-dimensional image data of a plurality of display methods, and a control device for selecting a display method to be input and an output display method corresponding to the input method. The three-dimensional image display device without glasses 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, the present invention provides 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. By providing a signal switching means for switching between a two-dimensional image signal and a three-dimensional image signal, the first aspect of the present invention is provided.
In addition to the effects of the three-dimensional image display device without glasses, a single three-dimensional image display device without glasses can be used without replacing the diffusion plate and lenticular lens on which images are projected from the liquid crystal projector with a screen for two-dimensional images. A two-dimensional image and a three-dimensional image can be selectively reproduced. In particular, when applied to the case of high-quality high-definition system is advantageous because thereby viewing a two-dimensional image of high quality without lowering the image quality.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a three-dimensional image display device without glasses, which is a premise of the present invention.

FIG. 2 is a configuration diagram of a part necessary for reproducing a binocular stereoscopic image on the premise of the present invention.

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

FIG. 4 is a configuration diagram of a part necessary for reproducing a four-lens stereoscopic image on the premise of the present invention.

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

FIG. 6 is an enlarged view of a part of FIG. 5;

FIG. 7 is a schematic diagram showing a state of light rays condensed at a suitable viewing position from the diffusion plate according to the embodiment of the present invention.

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

FIG. 9 is a schematic diagram of a conventional image 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-lens stereoscopic image.

FIG. 12 is a schematic diagram showing an image forming state of a pixel on a diffusion plate according to a conventional example.

FIG. 13 is an enlarged schematic view of a part of FIG. 12;

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

[Explanation of symbols]

 DESCRIPTION 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 Diffusion plate 12 Lenticular lens

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI G03B 35/24 G03B 35/24 (72) Inventor Minoru Yasuda 1-10-11 Kinuta, Setagaya-ku, Tokyo Japan Broadcasting Technology Research Association In-house (72) Inventor Daisuke Takemori 2--18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Hideyuki Kanayama 2--18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. 72) Inventor Kazuhiro Arai 2--18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-2-234189 (JP, A) JP-A-5-37948 (JP, A) Japanese Patent Application Laid-Open No. 62-209992 (JP, A)

Claims (3)

(57) [Claims] 1. A comprising the two liquid crystal projector which is arranged at appropriate intervals in the vertical direction or the horizontal direction, and a diffusion plate and the lenticular lens of the first surface, one of the liquid
Pixel for the right eye and left eye of the crystal projector and the other liquid
Image with right-eye and left-eye pixels of the crystal projector
Each pixel size of the image is
Glasses that are larger than the size of the projected image of the
In a three-dimensional image display device, one of the liquid crystal
The right-eye and left-eye pixels overlap the projected image
Give the two LCD projectors the same
The same signal is given in one three-dimensional image data
The part where the right-eye pixels and the left-eye pixels are projected is
A three-dimensional image display device without glasses, comprising fine adjustment means for finely adjusting the positions of the respective liquid crystal projectors so as to be partially superimposed and projected on a diffusion plate . 2. An apparatus according to claim 1, further comprising an input section for inputting three-dimensional image data of a plurality of display modes, and a control device for selecting a display mode to be input and an output display mode corresponding thereto. A three-dimensional image display device without glasses according to the above. 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. The three-dimensional image display device without glasses according to claim 1, further comprising signal switching means for switching between the image signal and the three-dimensional image signal.