JPH10191400A - Three-dimensional image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a three-dimensional image display device which prevents deterioration of the picture quality and for which a circuit scale is not increased. SOLUTION: Relating to pixels for one line of a liquid crystal display device, left and right display sub-pixels are alternately arranged like left, right,... right. Data that are inputted to a 1st sub-pixel group P1 are R and B data among left RGB data L1 and each of them is shown in a left sub-pixel R and a left sub-pixel B of display sub-pixels. On the other hand, G data are shown in a right sub-pixel G of the display sub-pixels among right RGB data R1. The timings of fetching left CG data and right CG data are the same timing. For instance, image data for left eye and right eye which are generated by left and right image generators are alternately supplied to the liquid crystal display device according to a timing signal from a timing controller. The liquid crystal display device successively supplies data to each pixel according to the timing signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional image display device, and more particularly to a three-dimensional image display device for displaying left and right images on one screen to obtain a three-dimensional image.

[0002]

2. Description of the Related Art As a conventional three-dimensional image display device, as described in Japanese Patent Application Laid-Open No. 2-146087, left and right images are formed by one dot (pixel or sub-pixel) on the screen of one liquid crystal display device. Some are arranged alternately so that stereoscopic vision can be obtained without using polarized glasses or the like. As a further improvement, there is one described as “3D display without glasses, developed by Sanyo for home use” on page 109 of Nikkei Electronics 620 dated October 24, 1994.

[0003]

The conventional apparatus obtains a stereoscopic view by arranging the left and right images slightly displaced from each other. However, in the case of alternately arranging one sub-pixel at a time, an input image is not obtained. Since the signal fetch timing is the timing for displaying each sub-pixel, the image data supply device side sets the right and left RG for each display timing of each sub-pixel.
There is a problem that the B data must be created and the circuit scale becomes large. This is a problem that the capacity of the semiconductor ROM is increased in a device in which the original data of the three-dimensional image is stored in the semiconductor ROM such as a game image and the like and the three-dimensional image is obtained by reproducing the original data. It becomes obvious.

To prevent this, a method is conceivable in which the right and left images are fetched at every two-pixel display timing and output to the right and left RGB sub-pixels constituting the two pixels. However, this method has a problem that the screen is jagged and the screen becomes difficult to see. This is because the capture timing is 2
This is because two pixels are represented by data for one pixel on each of the right and left sides, and the number of pixels (resolution) on each side is substantially reduced.

Accordingly, an object of the present invention is to provide a three-dimensional image display device which does not increase the circuit scale while preventing a decrease in image quality.

[0006]

In order to achieve the above object, a three-dimensional image display apparatus according to the present invention comprises three R subpixels for the right eye, G subpixels for the left eye, and B subpixels for the right eye. A display in which a first subpixel group having subpixels and a second subpixel group having R subpixels for the left eye, G subpixels for the right eye, and B subpixels for the left eye are sequentially arranged in the horizontal direction of the screen. Having means.
Here, the R sub-pixel, the G sub-pixel, and the R sub-pixel
(Red) for red corresponding to the three primary colors of G (green) and B (blue) light,
It means subpixels for green and blue.

Further, according to the present invention, display data for the right eye and display data for the left eye are fetched for each display timing of each sub-pixel group, and the three fetched display data R, G, B for the right eye and the left eye are simultaneously read. Display data to be used for one of the first sub-pixel group and the second sub-pixel group to be displayed, based on the three display data R, G, and B, and supplies the selected display data to the display means. A display data selecting means is provided.

As described above, since the data fetch timing is every one pixel display timing, the data generation timing on the side of the device that creates the display data is one for every three sub-pixels.
Times, and an increase in circuit scale can be prevented. Further, since the data fetch timing is every one pixel display timing, the reduction in resolution is less than in the case where the data is fetched every two pixel display timings.

Further, in order to achieve the above object, in the three-dimensional image display device of the present invention, a plurality of pixels composed of three sub-pixel groups corresponding to respective primary colors of RGB are sequentially arranged in the horizontal direction. A liquid crystal display section, optical filter means for the right eye and left eye alternately arranged in sub-pixel units on the display surface of the liquid crystal display section, and right eye data for generating display data for the right eye for each of the primary colors RGB. Creation means, left-eye data creation means for generating left-eye display data for each of the primary colors RGB, and right-eye data creation means and left-eye data creation means connected to the right-eye data creation means and left-eye data creation The data is fetched at every pixel display timing from the means, and when the display data of each pixel is determined, the left eye data and the right eye data fetched at the same timing are determined. G for G color right eye to the inner display data
In the case of color display data, R and R
When the G color to be displayed is the left-eye G color display data, the right-eye R color display data and the right-eye B color display data are used as the R and B colors, using the color display data and the left-eye B color display data. Display data selecting means for supplying one pixel of display data to the liquid crystal display unit.

In order to achieve the above object, a three-dimensional image display device according to the present invention comprises a plurality of pixels each composed of sub-pixels corresponding to first, second and third display colors arranged in a horizontal direction. Display unit, right-eye data including first, second, and third sub-pixel data for the right eye corresponding to the first, second, and third display colors, and first, second, and third sub-pixel data. Left-eye data composed of fourth, fifth, and sixth sub-pixel data for the left eye corresponding to each of the third display colors is input, and the first, second, and third data are input.
One sub-pixel data selected from the sub-pixel data of
One selected from the fourth, fifth, and sixth sub-pixel data corresponding to the same display color as the selected sub-pixel data
Image data conversion means for replacing the two sub-pixel data with each other and sequentially supplying the data to the display unit, wherein the data acquisition and output timings of the image data conversion means are set to one pixel display timing.

Further, in order to achieve the above object, the three-dimensional image display device of the present invention provides a three-dimensional image display device corresponding to each primary color of RGB.
A liquid crystal display unit in which a plurality of pixels each composed of one sub-pixel group are arranged in a matrix in the row and column directions, and for a right eye and a left eye, which are alternately arranged in sub-pixel units on a display surface of the liquid crystal display unit. Optical filter means, right-eye data generation means for generating right-eye display data for each of the RGB primary colors, left-eye data generation means for generating left-eye display data for each of the RGB primary colors, It is connected to the right-eye data generation means and the left-eye data generation means, fetches data from the right-eye data generation means and the left-eye data generation means at every one-pixel display timing, and includes first to third horizontally adjacent data.
The display data supplied from one of the right-eye data generation means or the left-eye data generation means to the first and third sub-pixels is output as display data of pixels in an odd-numbered column composed of the three sub-pixels up to And outputting the display data supplied from the other of the right-eye data generating means or the left-eye data generating means to the second sub-pixel, and connecting the fourth to sixth pixels adjacent to the odd-numbered pixel. The display data supplied from the other is output to the fourth and sixth sub-pixels as the display data of the pixels in the even-numbered column composed of one sub-pixel, and the display data supplied from the one is supplied to the fifth sub-pixel. Display data selection means for outputting.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
An example in which a liquid crystal display device is used will be described. The principle of the present invention will be described with reference to FIG. As shown in FIG. 1, the pixels for one line of liquid crystal have left, right, left, right,... Right and left display sub-pixels arranged alternately. Sub-pixels include a first sub-pixel group of R (red) for left, G (green) for right, and B (blue) for left, followed by R (red) for right, G (green) for left, and B for right.
(Blue) second sub-pixel group,...
Each sub-pixel group forms one normal pixel. The pixels composed of these three sub-pixels are shown in the figure as P1, P2,.

First, focusing on the first sub-pixel group P1,
The data input to the first sub-pixel group P1 is R and B data of the left RGB data L1 captured as the left image data, and the left sub-pixel R and the left sub-pixel B of the display sub-pixel, respectively. Will be displayed. On the other hand, of the right RGB data R1 captured as the right image data,
The G data is displayed on the right sub-pixel G of the display sub-pixel.

[0014] Left R captured as left image data
Of the GB data L1, the G data is not used and is rewritten to the next data at the next fetch timing. Further, among the right RGB data R1 captured as the right image data, the R and B data are not used and are rewritten to the next data at the next capturing timing. The timing of taking in the left image data and the right image data is the same timing. When an image is generated by computer graphics, left and right image data are generated and supplied at the same timing on the time axis.

Next, focusing on the second sub-pixel group P2,
The data input to the second sub-pixel group P2 is G data of the left RGB data L2 captured as the left image data, which is the left sub-pixel G of the display sub-pixel.
Will be displayed. On the other hand, of the right RGB data R2 captured as the right image data, the R data is displayed on the right subpixel R of the display subpixel, and the B data is displayed on the right subpixel B of the display subpixel. Is done.

[0016] Left R captured as left image data
Of the GB data L2, the R and B data are not used and are rewritten to the next data at the next fetch timing. Also, the right RG captured as the right image data
Of the B data R2, the G data is not used and is rewritten to the next data at the next fetch timing. Thereafter, the image data is fetched and displayed by this repetition.

In other words, the data selection method described above, in other words, when determining the display data of each pixel, the data for the left eye and the data for the right eye ｛(L1,
R1), (L2, R2)... {}, If the G color to be displayed is the right-eye G color display data of the pixels P1, P3. R3) ・
In the case of ..., R-color display data for the left eye and B-color display data for the left eye are used as the R and B colors. Further, when the G color to be displayed is the left-eye G color display data of the pixels P2, P4,..., In terms of data, (L2, R2), (L4,
R4)..., The right-eye R color display data and the right-eye B color display data are used as the R and B colors,
Display data for one pixel (P1, P2,...) Is supplied to the liquid crystal display unit.

According to this, since the data fetch timing is every one pixel display timing, the data generation timing on the side of the device for creating the right image data and the left image data is once for every three sub-pixels, which increases the circuit scale. Can be prevented. Further, since the data fetch timing is every one pixel display timing, the reduction in resolution is less than in the case where the data is fetched every two pixel display timings.

In the above description, the display for one line has been described. However, in an actual liquid crystal display device, a plurality of lines are arranged in a plurality of lines in a vertical direction, and as shown in FIG. Are arranged side by side. In such a case, the arrangement of the sub-pixels on the second line and the third line is different from that of the first line. Therefore, on the second line, the G color described above is replaced with the B color, and the R color is replaced with the G color.
The same effect can be obtained by replacing the color B with the color B and replacing the color B with the color R. Similarly, on the third line, the same effect can be obtained by replacing the above-described G color with the R color, replacing the R color with the B color, and replacing the B color with the G color.

Next, a specific configuration of the embodiment of the present invention will be described with reference to FIG. The image display device of FIG. 2 includes a right-eye image generator 1 that generates right-eye image data, a left-eye image generator 2 that generates left-eye image data, and a display of RGB generated by the right-eye image generator 1. A right display buffer 3 for temporarily storing display data corresponding to a color, a left display buffer 4 for temporarily storing display data corresponding to an RGB display color generated by the left-eye image generator 2, and a right display buffer A selection circuit 6 for alternately switching and outputting data supplied from the buffer 3 and the left display buffer 4 in accordance with a timing signal from the timing controller 5
And a liquid crystal panel 9 including a liquid crystal display device 7 and a direction control optical element 8.

In the present embodiment, the right-eye image generator 1 and the left-eye image generator 2 generate a three-dimensional image as a two-dimensional image viewed from the right and left eyes in a three-dimensional graphics device. However, the right-eye image generator 1 and the left-eye image generator 2 are not limited to this example, and the sampling circuit that samples the right-eye camera image signal and the left-eye camera image signal supplied in an analog manner at a predetermined timing. It goes without saying that it may be something like

The RGB display data created by the right-eye image generator 1 and the left-eye image generator 2 are sequentially stored in the right display buffer 3 and the left display buffer 4. At this time, the data is taken into the right display buffer 3 and the left display buffer 4 at each pixel display timing in the right-eye image generator 1 and the left-eye image generator 2. In addition, the timing controller 5
It operates in synchronization with a synchronization signal 19 from the right-eye image generator 1 and the left-eye image generator 2.

The timing controller 5 reads data from the left display buffer 4 in the order of R, B, and G,
A read signal is supplied to the right display buffer 3 and the left display buffer 4 so that data is read from the right display buffer 3 in the order of G, R, and B. The selection circuit 6 alternately supplies the data read from the right display buffer 3 and the left display buffer 4 to the liquid crystal panel 9 according to a timing signal from the timing controller 5.

The liquid crystal panel 9 sequentially supplies the input display data to each pixel of the liquid crystal display device 7 according to a display control signal 18 from the timing controller 5. As a result, the liquid crystal display device 7 sequentially displays the data supplied from the selection circuit 6 on each sub-pixel. As described above,
As shown in FIG. 2, it is possible to display an image in which the G data for the left and right eyes are interchanged. When a display image of the liquid crystal display device 7 is viewed through a direction control optical element 8 as described in Japanese Patent Application Laid-Open No. 8-101367, a stereoscopic three-dimensional image can be reproduced.

FIG. 3 shows a more specific embodiment. In this example, a three-dimensional image display device that displays three-dimensional image data stored in a ROM is shown. The image for the right eye is stored in the ROM 10 for the right eye image. The image for the left eye is stored in the ROM 11 for the left eye image. The right-eye image generator 12 generates RGB image data based on the data read from the right-eye image ROM 10. The left-eye image generation device 13 is provided with a left-eye image ROM 11.
The image data of RGB is generated based on the data read from.

Each of the RGB image data generated by the right-eye and left-eye image generators 12 and 13 is
/ A converters 14 and 15. The D / A converters 14 and 15 convert digital RGB data into analog RGB signals in accordance with the sampling rate of the three-dimensional display device (the right-eye image generating device 12 and the left-eye image generating device 13) and output them.

The display signals once converted into analog RGB signals are converted again into digital RGB data by A / D converters 16 and 17 in accordance with the timing of each sub-pixel from the timing controller 5. The timing controller 5 operates in synchronization with a synchronization signal 19 from the right-eye image generator 12 and the left-eye image generator 13.

The reason why the signal is once converted to an analog signal and returned to a digital signal again is to absorb a synchronization error between the timing controller 5 and the image generator. D / A converters 14, 15 and A / D converter 1
The functions equivalent to those of the buffer circuits 3 and 4 shown in FIG.

The display data converted into digital RGB signals by the A / D converters 16 and 17 is supplied to the selection circuit 6.
Supplied to The output of the A / D converter 16 and the output of the A / D converter 17 are alternately changed according to the timing signal from the timing controller 5.
Is supplied to the data input. The liquid crystal panel 9 sequentially captures display data input to the data input terminal in accordance with a display control signal 18 from the timing controller 5, and
It is supplied to each sub-pixel of the liquid crystal display device 7.

As described above, it is possible to display an image in which the G data for the left and right eyes are interchanged as shown in FIG. The display image of this liquid crystal display device 7 is described in
When viewed through the direction control optical element 8 as described in JP-A-1367, a stereoscopic three-dimensional image can be reproduced.

As described above, in the present embodiment, since the data fetch timing is every one pixel display timing, the data generation timing on the side of the device that creates the right image data and the left image data is once for every three sub-pixels. ,
An increase in circuit scale can be prevented. Further, since the data fetch timing is every one pixel display timing, the reduction in resolution can be reduced as compared with the case where the data is fetched every two pixel display timings.

In the above description, only the arrangement of the pixels and sub-pixels for one line has been described. However, in the actual liquid crystal display device 7, a plurality of lines are arranged in a plurality of lines in the vertical direction, and as shown in FIG. They are arranged in a matrix in the direction. In FIG. 4, (1, 1) (1, 2)
.. (N, m) indicate each pixel. The arrangement of the sub-pixels in each pixel is determined so that the display colors of the right-eye and left-eye sub-pixels are not the same between the upper and lower lines (rows).

For example, in FIG. 4, the first line is RGB, R
... Are arranged in the order of RGB, the second line is GBR,
GBR: arranged in the order of GBR, the third line is BR
G, BRG... BRG are arranged in this order. Below, 4
This is repeated from the line onward.

Here, looking at the first line, (1,
The pixel of 1) and the pixel of (1, 2) form R, B data for the left eye and G data for the right eye from (1, 1) the image data for the right eye and the image data for the left eye which are simultaneously captured.
, And the right-eye R and B data and the left-eye G data constitute the pixel (1, 2). That is,
G of the right-eye image data and the left-eye image data is exchanged to form two pixels adjacent in the row direction.

Looking at the second line, from the image data for the right eye and the image data for the left eye, G, R data for the left eye and B data for the right eye constitute a pixel (2, 1), G, R data for left eye and B data for left eye (2, 2)
Pixel. In other words, B of the right-eye image data and the left-eye image data are exchanged, and the two adjacent pixels in the row direction
One pixel. Similarly, in the third line, two pixels adjacent in the row direction are formed by exchanging the R of the right-eye image data and the left-eye image data.

As described above, the right-eye data composed of the first, second, and third sub-pixel data for the right eye corresponding to the three display colors of RGB, and the fourth data for the left eye corresponding to the three display colors of RGB. , Fifth, and sixth sub-pixel data, the first, second, and third sub-pixel data are input.
Sub-pixel data (1
(G on the second line, B on the second line, R on the third line) and the fourth, fifth, and sixth sub-pixel data corresponding to the same display color as the selected sub-pixel data. It is displayed by exchanging one sub-pixel data.

In other words, from a different point of view, six sub-pixels forming two pixels of an odd column and an even column adjacent to each other in the row direction are referred to as first, second,. When expressed, the display data for the left eye is output to the first and third sub-pixels and the display data for the right eye is output to the second sub-pixel as the display data of the pixels in the odd columns. Further, as the display data of the pixels in the even-numbered columns, the display data for the right eye is output to the fourth and sixth sub-pixels, and the display data for the left eye is output to the fifth sub-pixel. Naturally, the operation is the same even if the odd columns and the even columns are exchanged.

[0038]

As described in detail above, according to the present invention, it is possible to provide a three-dimensional image display device which does not increase the circuit scale while preventing the image quality from deteriorating.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a pixel arrangement for explaining the principle of the present invention.

FIG. 2 is a circuit block diagram showing an embodiment of the present invention.

FIG. 3 is a circuit block diagram showing another embodiment of the present invention.

FIG. 4 is an explanatory diagram illustrating a planar pixel arrangement of the display device according to the embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 image generator for right eye 2 image generator for left eye 3 buffer for right display 4 buffer for left display 5 timing controller 6 selection circuit 7 liquid crystal display device 8 optical element for direction control 9 liquid crystal panel 10 ROM for right eye image 11 for left eye image ROM 12 Image generator for right eye 13 Image generator for left eye 14, 15 D / A converter 16, 17 A / D converter 18 Display control signal 19 Synchronization signal

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takeshi Shiritani 2-6-3 Otemachi, Chiyoda-ku, Tokyo Inside Nippon Steel Corporation (72) Inventor Kazutoshi Hashizume 2-6, Otemachi, Chiyoda-ku, Tokyo -3 Inside Nippon Steel Corporation

Claims (5)

[Claims] An R sub-pixel for the right eye, a G sub-pixel for the left eye,
A first subpixel group having three subpixels of a B subpixel for the right eye, a second subpixel group having an R subpixel for the left eye, a G subpixel for the right eye, and a B subpixel for the left eye; And display means for alternately arranging the right-eye display data and the left-eye display data for each display timing of each sub-pixel group, and the right-eye R, G, B Three display data and R, G,
Display data selection means for selecting display data to be used for one of the first and second subpixel groups to be displayed from the three display data B and supplying the display data to the display means; A three-dimensional image display device comprising: 2. A liquid crystal display section in which a plurality of pixels composed of three sub-pixel groups corresponding to respective primary colors of RGB are sequentially arranged in a horizontal direction, and alternately in sub-pixel units on a display surface of the liquid crystal display section. Optical filter means for the right eye and left eye, and right-eye data generation means for generating display data for the right eye for each of the primary colors of RGB, and display data for the left eye for each of the primary colors of RGB Connected to the right-eye data generation unit and the left-eye data generation unit, and fetches data from the right-eye data generation unit and the left-eye data generation unit at each pixel display timing. When determining the display data of a pixel,
When the displayed G color is the right-eye G-color display data among the left-eye data and the right-eye data captured at the same timing, the left-eye R-color display data and the left-eye B-color display data are used as the R and B colors. When the G color to be displayed is the left-eye G color display data, one pixel is displayed on the liquid crystal display unit using the right-eye R color display data and the right-eye B color display data as the R and B colors. A three-dimensional image display device comprising: display data selection means for supplying data. 3. A display section in which a plurality of pixels each composed of sub-pixels corresponding to each of the first, second, and third display colors are arranged in a horizontal direction, and the first, second, and third display colors are provided. , Right-eye data composed of the first, second, and third sub-pixel data for the right eye, and fourth and fourth data for the left eye, corresponding to the first, second, and third display colors, respectively. 5. The left-eye data composed of the fifth and sixth sub-pixel data is input, and one sub-pixel data selected from the first, second and third sub-pixel data and the selected sub-pixel data Image data conversion means for replacing one of the fourth, fifth, and sixth sub-pixel data selected from the fourth, fifth, and sixth sub-pixel data corresponding to the same display color and sequentially supplying the sub-pixel data to the display unit; Data capture and output timing of the image data conversion means is set for each pixel display timing 3-dimensional image display apparatus characterized by the. 4. A liquid crystal display section in which a plurality of pixels composed of three sub-pixel groups corresponding to respective primary colors of RGB are arranged in a matrix in a row and a column direction; Right-eye and left-eye optical filter means alternately arranged in pixel units, right-eye data generation means for generating right-eye display data for each of the RGB primary colors, and left-eye display data for each of the RGB primary colors. A left-eye data generator for generating each primary color, connected to the right-eye data generator and the left-eye data generator, and output data from the right-eye data generator and the left-eye data generator at each pixel display timing. And the first and third sub-pictures are displayed as display data of odd-numbered columns of first to third sub-pixels adjacent in the horizontal direction. The display data supplied from one of the right-eye data generation means or the left-eye data generation means is output to the second sub-pixel, and the second sub-pixel is supplied with the display data supplied from the other of the right-eye data generation means or the left-eye data generation means. And display data of pixels in the even columns, which are adjacent to the pixels in the odd columns and are made up of three sub-pixels from the fourth to the sixth, as the display data of the fourth and sixth pixels.
Display data selection means for outputting display data supplied from the other to the sub-pixels and outputting display data supplied from the one to the fifth sub-pixel. apparatus. 5. The three-dimensional image display device according to claim 4, wherein the arrangement of the RGB sub-pixels of the pixels in each column is different for at least three adjacent rows. Dimensional image display device.