JPS62145993A - Stereoscopic picture viewing device - Google Patents

Abstract

PURPOSE:To prevent flickering and deterioration in vertical resolution from occurring by increasing the repeating frequency of left-eye and right-eye pictures and the number of scanning lines of the said pictures. CONSTITUTION:One-frame share of the picture data of left-eye picture outputted from a picture reproduction circuit 21 is written in a frame memory 22L, and that of right-eye picture is in a frame memory 22R. The written left-eye and right-eye pictures are read out by using a reading signal from a read timing control circuit 27 in a non-interlacing state with the horizontal frequency that is four times of that of standard television signal and the vertical frequency two times of that of the standard television signal. The signals from the memories 22L and 22R are alternately supplied to a monitor at every 1/120sec via a D/A converter 25. And at the same time, the view scopes of the left and right eyes of the viewer are shut off alternately at every 1/120sec by a shutter means (not shown in the figure).

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for stereoscopically viewing computer graphics images displayed on a monitor screen.

[Summary of the invention]

This invention alternately displays images for the left eye and images for the right eye on the screen of a monitor receiver, and synchronizes with the images for the left and right eyes using a shutter means to alternately display the visual field for the left eye and the right eye. In devices that perform stereoscopic vision by spatially combining both images due to the afterimage effect of the eye, flickering can be prevented by increasing the repetition frequency of images for the left and right eyes. This is to prevent deterioration of vertical resolution by increasing the number of scanning lines of the image.

[Conventional technology]

Various techniques have been considered to enable stereoscopic viewing of images created by computer graphics.

In order to make the image displayed on the screen of the monitor receiver stereoscopic, for example, as shown in Fig. 7, the image of a person (
11 is the left eye image (3L) on the right side of the background tree (2)
And the picture for the right eye where the figure (1) is on the left side of the tree in the background (2)? ? ! (3R) and visually synthesize them as shown on the right side of the figure.

In this way, it is possible to perform stereoscopic viewing in which the human image appears in front of the background tree (2).

In this case, the visual combination is as follows: the viewer's left and right eyes (4L) (4L) are placed on the screen of the monitor receiver.
In front of R), a shutter means configured like glasses and made of PLZT or the like is provided, and an image for the left eye (3L) and an image for the right eye@! (3R) are displayed alternately on the monitor screen, and in synchronization with the repetition of these two images displayed on the monitor screen, the image (3L) is shown only to the viewer's left eye (4L). , the image (3R) is the viewer's right eye (4R)
), there is a method of blocking the field of view of one of the shutter means so that it is supplied respectively.

Conventionally, this technology for viewing stereoscopic images has been used only within the scope of standard television systems.

That is, among the images created by a computer, the left eye image (3L) is an odd field of a standard television signal, the right eye image (3R) is an even field of a standard television signal, and so on alternately within one frame. In addition to displaying an image for the left eye and an image for the right eye, stereoscopic viewing was achieved by alternately switching the shutter means to the left and right for each field.

[Problem that the invention seeks to solve]

In the case of the conventional stereoscopic image viewing device as described above, the switching frequency of the shutter means is 3011 Hz, and the image repetition frequency for the left and right eyes is also 30 Hz.

Therefore, the flicker in the viewing stereoscopic image is large and noticeable.

In addition, since the images for the left and right eyes are each an L-field image, the number of scanning lines is roughly 240 (the vertical resolution is low, and in addition, standard television signals are interlaced, As shown in the figure, the scanning lines of odd fields look like solid lines, while the scanning lines of corner fields look like broken lines, so for example, for the scanning lines of the upper floor 3 of the figure of odd fields, the scanning lines of even fields look like solid lines. The scanning lines of floor 2 and Nf14 now correspond, making it difficult to stereoscopically view detailed images.

[Means for solving problems]

This invention writes one frame worth of images for the left eye and right eye into frame memories for the left eye and right eye, respectively, and writes one frame worth of images for the left eye and right eye, respectively, and writes one frame worth of images for the left eye and right eye, respectively, and writes one frame worth of images for the left eye and right eye, respectively, and writes one frame worth of images for the left eye and right eye, respectively, and writes one frame worth of images for the left eye and right eye, respectively, and writes one frame worth of images for the left eye and right eye, respectively, and writes one frame worth of images for the left eye and right eye, respectively, and writes one frame worth of images for the left eye and right eye, respectively, and writes one frame worth of images for the left eye and right eye, respectively, and writes one frame worth of images for the left eye and right eye, respectively, and writes one frame worth of images for the left eye and right eye, respectively, and writes one frame worth of images for the left eye and right eye, respectively. One frame worth of images for the left eye and one frame for the right eye are read out alternately every time and displayed on the video display device, and the visual field of the left and right eyes of the viewer is synchronized with the time of 1/2 of the field period. This is a stereoscopic image viewing device that alternately blocks the images.

[Effect]

The switching frequency of the left IN and right eye shutters is 12011z, and flicker is not noticeable. Furthermore, each of the left and right eye images is a one-frame image, and the vertical resolution is full (no deterioration) compared to the standard television system.

Therefore, good stereoscopic vision can be achieved.

[Embodiment] Fig. 1 shows an example of the overall system configuration of this invention device, in which (10) is a host computer, (20) is an image generation unit, (30) is a monitor receiver, and (40) is a shutter. The glasses (41) are the glasses and the ivy driver.

FIG. 2 shows an example of the image generation section (20), including the image generation circuit (21) and the frame memory (22) of 2111i1.
L) and (22R), as well as a changeover switch (
23) (24) , D/A converter (25) ,
Write/read timing control circuits (26) and (2)
7).

A group of drawing instructions from the host computer (10) is supplied to the image generation circuit (21), and this image generation circuit (21)
The image data is converted into line and surface image data consisting of R, G, and B three primary color signals. One frame of this image data, that is, 525 horizontal lines, is stored in the frame memory (
22L) or (221?). In this case, the left eye image of the stereoscopic image described above is written into the frame memory (22L), and the right eye image is written into the frame memory (22R). The write timing control circuit (26) controls the switching signal and write signal of the changeover switch (23) so that the images for the left eye and the right eye generated by the image generation circuit (21) are correctly written into each frame memory. The image generation circuit (21) supplies a signal indicating which image it is to the write timing control circuit (26).

In this way, the left and right eye images stored in the memories (22L) and (22R) have a horizontal frequency that is four times the horizontal frequency of the standard television signal and a vertical frequency that is four times the horizontal frequency of the standard television signal. The frequency is read out at twice that of the standard television signal, and the switch (24) is connected to the readout timing control circuit (27).
The memory (22L
) and the signal from memory (22R) are 1/
The signal is obtained from this switch (24) alternately every 120 seconds. In this case, each frame memory (22L) and (2
211) is in a so-called non-interlaced state,
Read out sequentially.

The read image (image data is the D/A converter (25)
is converted into a three-primary color video signal by
It is supplied to M(20).

Here, when the signals read from the memories (22L) and (22R) are compared with the standard television signal, the result is as shown in FIG.

In other words, a standard television signal has one frame with 525 horizontal lines of 1/30 seconds, the first field Fz (262,5 horizontal lines) of 1/60 seconds in the first half, and the second field F2 of 1/60 seconds in the second half. (262,5
horizontal line) (see Figure 3A).

If this one frame worth of standard television signal is to be output at 1/60 seconds in a non-interlaced state as shown in Figure 3B, the horizontal synchronization frequency should be twice that of the standard television signal. .

Therefore, we prepared one frame's worth of left-eye and right-eye data in such a non-interlaced state as shown in Figure 3 C and D, and further adjusted the horizontal synchronization frequency by 2.
times, and therefore four times that of a standard television signal, and also a vertical synchronization frequency of two times that of a standard television signal.
If the image is doubled (with a cycle of 1/120 seconds) and read out alternately from the memory (22L) and (22R), the image for the left eye will be as shown in Figure 3, and the image for the right eye will be F in the same figure.
A frame sequential signal with a repetition period of 60 Hz as shown in FIG.

FIG. 3G shows the switching signal SW of the switch (24) from the read timing control circuit (27). When this switching signal SW is high level, it is on the memory (22L side), and when it is low level, it is on the memory (22R side). II+, respectively.

Further, from the readout timing control circuit (27), a vertical synchronizing pulse V of 120 Hz is obtained in synchronization with the switching signal SW of the switch (24), and a horizontal frequency of 32.7 kHz, which is twice the horizontal frequency of a non-interlaced monitor receiver, for example, is obtained. 65.4 kllz horizontal synchronizing pulse ■] is obtained, which is supplied to the monitor receiver (30), and the deflection of this monitor receiver (elephant tJ31 (30)
, -H.

Therefore, one frame of the left eye image and one frame of the right eye image are displayed on the screen alternately for 1/120 seconds in a non-interlaced state.

Further, a switching signal of the switch (24) and a 60Hz signal synchronized with the vertical synchronization pulse V are supplied from the readout timing control circuit (27) to the shutter driver (41), and the shutter glasses (40) are opened and closed alternately on the left and right sides. Therefore, when the left eye image is displayed on the monitor receiver (30), the right eye field of view of shutter eye 1 (40) is obstructed, and the right eye image is displayed on the monitor receiver! When the image is displayed on the camera (30), the field of view of the left eye of the shutter glasses (40) is blocked.

In this way, images for the left eye and images for the right eye are alternately output in a frame-sequential manner on the screen of the monitor image reception tM (30), while
By opening and closing the shutter glasses alternately on the left and right sides in synchronization with the sequential cycle of this image, both the left eye and the right eye have 6011
You will see repeated images of z, and the left and right eye images will be combined due to the eye's afterimage effect and will be seen as a three-dimensional image.

FIG. 3 shows another example of the image generation section, in which image generation devices each having one frame memory are provided separately for left-eye images and right-eye images.

That is, (50L) is the left eye image generation device, (50
R) is an image generation device for the right eye, and each image generation circuit (R) is an image generation device for the right eye.
51L), left eye frame memory (52L), D
/A converter (53L) and image generation circuit (51R)
), a right eye frame memory (52R), and a D/A converter (53R).

In this case, the timing signal TI from the device (50L)
is supplied to the timing control circuit of the device (50R) to resynchronize the timing relationship of the device.

A group of drawing commands from the host computer are sent to the left eye and right eye image generation devices (54) by a switch (54).
(0L) and (50R), and the device (50
The image for the left eye is written into the frame memory (51L) of the device L), and the image for the right eye is written into the frame memory (51R) of the device (50R). And these memories
The signals read from (52L) and (52R) are D
/A converter (53L") and (53R) convert it into a three-primary color video signal.Then, the switch (55) is connected to the memory (52L) in exactly the same way as in the example of FIG.
) and (52R) in synchronization with the read timing.
By switching alternately with the Hz switching signal SW, the left eye image and the right eye image are reduced to 1/12 in the same manner as described above.
The images are alternately supplied to the monitor receiver (30) every 0 seconds, and are alternately displayed in screen sequence. In this case, the monitor receiver (
30), vertical and horizontal synchronizing pulses (2) and (H), and a shutter drive signal are outputted from one of the image generating devices (50R).

FIG. 5 shows still another example of the image generation section, in which two frame memories are used for the left eye and two for the right eye, respectively, and a frame memory (62L1) for the left eye image.
(62L2) and a frame memory (621h) (62R2) for the right eye image.

The left eye image and right eye image from the image generation circuit (61) are transferred to the left eye frame memory (6) by a switch (64).
2LL ) (62L2) and right eye frame memory (62R1) (62R2), and these memories (62L1) (
62L2 ) and (62R1) The image data read out from (62R2) is switched by the switch (69) in synchronization with the readout of the memory by a 60Hz switching signal SW, and the left and right eye images are changed as described above. A frame sequential signal is obtained from this switch (69) and is supplied to a monitor receiver (30) via a D/A converter (63).

In this example: :N[lil's memory (62Lt)
(62L2) and (621h) (62R2
) are switches (65) (66) and switches (66) such that when one memory is in a state in which a generated image can be written, the other memory is in a state in which it can be read.
67) The input and output sides of the memory are switched by (6B).

Other timing relationships are the same as in the previous example.

In this example, animation is possible because the memory can be switched at the end of drawing.

FIG. 6 is a developed version of the example in FIG. 5, and is an example in which two or more frame memories are provided for each of the left-eye image and the right-eye image.

In other words, a 5 flill frame memory (62L1) to (62Ls) is used for the image for the left eye, and a frame memory for the right eye (62L1) to (62Ls).
5 (flit frame memory (62R)
1) to (62Rs) are provided, and these frame memories (62L1) to (62Ls) are connected to switches (65'
) (66') switches the write memory and read memory on the input and output sides so that they are not the same memory, and the frame memory (62R1) ~
(6211s) is also switched in the same way by switches (67') (6B').

In the case of this example, by storing the drawing results in advance in all of the frame memories of 5 (hardware) and sequentially switching the output, smoother animation is possible compared to the case of FIG.

〔Effect of the invention〕

According to this invention, the repetition frequency of the images for the left eye and the right eye on the monitor screen is 6011z, which is twice the frequency of the conventional case mentioned at the beginning, and flicker is hardly noticeable. .

Furthermore, since the images for the left eye and for the right eye are non-interlaced frame signals, the number of scanning lines is twice that of the conventional case, and the vertical scanning (image resolution) does not decrease.

From the above, according to the present invention, an easy-to-see stereoscopic image can be obtained.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the system configuration of the present invention, FIG. 2 is a block diagram showing an example of the configuration of the main part thereof, and FIG. 3 is a diagram for comparing the signal according to the present invention with a standard television signal. 4 to 6 are block diagrams showing the configuration of other examples of the main parts of the present invention, FIG. 7 is a diagram explaining the principle of stereoscopic vision, and FIG.
The figure is an explanatory diagram of the scanning state on the monitor screen. (22L) is a frame memory for the left eye, (22R) is a frame memory for the right eye, (24) is a memory selector switch,
(27) is a read timing control circuit, and (30) is a monitor receiver. Figure 1 Maru I *i 1. Display of skewer 17V 1985 Patent Application No. 287309 3. Relationship with the case of the person making the amendment Patent applicant address 6-7-351pf Name (218) Sony Corporation Representative for Illustrated Products for Parts, Tokyo The number of inventions increases due to Director Noriyoshi Ohga 4, Agents 6, 7 + Ii Masaru (11 specifications, 5th line from the bottom of page 2 to the last line of page 2 "As shown in Figure 7...
···do. '' should be corrected as follows. Figures such as those shown in Figure 7 B and C, which correspond to perspective projection views of a 1" rectangular parallelepiped viewed from the left and right eyes, respectively, are prepared. When these figures shown in Figure 7 B and C are visually synthesized, the 7th As shown in Figure A, it can be observed as a three-dimensional image that stands out from the monitor screen.'' (2) Same as above, page 3, lines 1 to 2, lines 1. It can be done like this. ” to be deleted. (3) Same, page 5, line 12 r 12011zJ
6011z Correct J and H1. (4) Same, page 6, lines 16 to 17, line 1...
・Delete "line". (5) In the drawings, Figure 7 is corrected as shown in the attached sheet. that's all

Claims (1)

[Claims] One frame worth of images for the left eye and one frame for the right eye are written into the frame memories for the left eye and the right eye, respectively. One frame worth of images for the left eye and one frame for the right eye are read out alternately every time and displayed on the video display device. A stereoscopic image viewing device that alternately blocks the field of view.