JPS6380694A - Stereoscope - Google Patents

Abstract

PURPOSE:To shorten a shutter opening time, to display a whole field picture and to make insensible of flickering by using a picture displaying means, which has the holding function of a variable density information at its displaying face, for a right eye sight and for a left eye sight. CONSTITUTION:A timing controlling part 33 D/A-converts right eye sight data and left eye sight data, supplied from a picture memory 31, and outputs them after turning them into television signal, and simultaneously decides the opening timing of the shutter for a right eye 391 and of the shutter for a left eye 392. Picture displaying means, the displaying face of which has a function to hold the variable density information, is used as the picture displaying means 34, 35, and for instance, the liquid crystal television of an active matrix system can be used. Thus, a picture information is held at the displaying face of the picture displaying means 34, 35, then the whole picture can be seen enough even when the shutter opening time is short.

Description

[Detailed description of the invention] [Object of the invention 1 (Industrial application field) The present invention relates to a stereoscopic viewing device.

(Prior art) As an image display means, CRT (Cathode Ra
ytube: cathode ray tube) is typical, but this CR
As a way to make the image displayed on T look three-dimensional,
There is a method of showing different images to the observer's left and right eyes. Figure 6 shows a concrete example using a television camera. That is, the operations of the two left and right television cameras 11 and 12 are controlled by the control signal 311 from the timing control unit 13 to photograph the same subject 14 at slightly different angles, and at the same time, the right camera 11 is The timing control section 13 switches between the output 812 and the output 813 of the left camera 12 for each field, and provides an output 814 to the CRT 15.

On the other hand, the 11th observer 19 uses a CRT1
5 Observe the image above. At this time, when displaying the right eye image 6812, the right eye shutter 17 opens and the left eye image 813
The timing control unit 13 controls the light shielding device 16 so that the left eye shutter 18 opens when displaying tJA@S.
15. When S16 is applied, the observer 19 can observe the image on the CRTl5 three-dimensionally.

FIG. 7 is a timing chart of various signals in the configuration of FIG. 6. FIG. 7 (a> is the timing control section 13
This is the vertical synchronization signal S11 generated. The two television cameras 11 and 12 operate according to this signal 811, and the seventh
As shown in FIG. 7(b) and FIG. 7(C), the video signal 812
, 813 are output. Timing I! The ilJ control unit 13 alternately selects the outputs 812 and 813 of the two television cameras 11 and 12 for each field, and outputs the output 814 to the CRT l.
5, the shutter is opened so that the right eye shutter 17 is closed when the right eye visual image is output (FIG. 7 (d)), and the left eye shutter 18 is opened when the left eye visual image is output (FIG. 7 (e)). Signals 815 and 816 are generated and output to the light shielding device 16.

In the above-mentioned stereoscopic viewing device using the CRTl5, since each pixel is displayed instantaneously, gradation information is not retained on the display surface of the CRTl5, and in order to see the entire image, the above-mentioned information is required from the start to the end of image display. It is necessary to keep the shutters 17 and 18 open. To do this, the selection of the image to be displayed (right eye visual output, left eye visual output) and the opening and closing of the shutter must be switched on a field-by-field basis, so both the right eye shutter 17 and the left eye shutter 18 The number of times the shutter is opened is half the number of fields per second. Therefore, a problem arises in that the opening/closing operation of the ↑P vine is perceived as flicker to the eye.

Furthermore, since the number of fields that can display images is halved, there is a drawback that some of the moving image information is lost.

(Problems to be Solved by the Invention) As described above, the conventional stereoscopic viewing device cannot hold an image on the display screen, so the entire image cannot be seen unless the shutter is kept open during the image display period in the field. for that,
It was necessary to switch between the right-eye visual image display and the left-eye visual image display for each field, which halved the number of images to be displayed, creating a flickering sensation and wasting information.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a stereoscopic viewing device that does not cause flicker and is capable of displaying an entire field image.

[Structure of the Invention] (Means for Solving the Problems) The present invention takes the following measures in order to solve the above problems and achieve the object.

In other words, the viewer's left and right eyes are shielded from light separately, and an image for the right eye and an image for the left eye are displayed in synchronization with the shielding, allowing the viewer to see a three-dimensional image. In a stereoscopic viewing device, the display surface has a function of retaining gradation information, and image display means for right-eye viewing and left-eye viewing;
Display surface light shielding means for shielding each display surface of these image display means, observer's eye light shielding means for shielding light from the left eye and right eye of the observer, the image display means for right eye viewing, and the left eye. and a timing control means for outputting an image signal for right-eye viewing and an image signal for left-eye viewing to the celebration image display means, respectively, and controlling opening/closing of the display screen light-shielding means and the observer's eye light-shielding means. The structure is as follows.

(Function) In this way, if image information is retained on the display surfaces of the image display means for right-eye viewing and left-eye viewing, the display surfaces of which have the function of retaining gradation information, the shutter opening time can be shortened. In any case, it is therefore possible to display the entire field image,
Also, there is no noticeable flicker.

(Example) Hereinafter, an example of a stereoscopic viewing apparatus according to the present invention will be described with reference to the drawings.

1 and 2 are block diagrams showing a stereoscopic viewing apparatus as an embodiment of the present invention, and FIGS. 3 and 4 are diagrams showing operation timing.

The stereoscopic viewing device of this embodiment is an example applied to a digital device in which image data to be displayed is already stored in the image memory 31.

In FIG. 1, the CPU 32 gives an instruction signal 332 to the timing control section 33 to instruct stereoscopic display. The timing control unit 33 converts the right-eye visual image data and the left-eye visual image data taken in from the image memory 31 into D/A, converts them into television signals, and outputs them, and simultaneously operates the right-eye viewing shutter 391 and the left-eye viewing shutter 392. Determine the opening timing.

The right eye visual image display means 34 displays the right eye visual image.

The right display screen shutter 36 is attached to the display surface of the right eye visual image display means 34 in order to control the passage and blocking of light between the right eye visual image display means 34 and the right eye of the observer 38. .

The right eye shutter 391 is provided on the light shielding means 39 attached to the observer 38. The left eye visual image display means 35 displays the left eye visual image, and similarly to the above, the left display screen shutter 37
, and a left-eye viewing shutter 392.

As shown in FIG. 2, the image memory 31 consists of a right-eye visual image memory 31R that stores right-eye visual image data and a left-eye visual image memory 31L that stores right-eye visual image data. Visual image data and left eye visual image data can be read out in parallel and separately.

The details of the timing control section 33 are configured as shown in FIG. That is, the timing signal generating section 41 determines the timing of image display and shutter opening. The right eye visual image data readout signal generation section 42 selects display images in order from the images specified by the CPU 32, and further selects the display images from the images designated by the CPU 32, and further outputs the timing signal generation section 4.
Vertical and horizontal synchronization signals 541 for right eye visual display that generate 1
According to the timing of 1, a signal @5311R for reading the right eye visual image data is generated. The right-eye visual image data readout signal generating section 43 generates a signal 8311L for reading right-eye visual image data in accordance with the timing of the left-eye visual image display vertical/horizontal synchronization signal 5412, like the generating section 42 described above. The right eye visual image D/A unit 44 stores the right eye visual image memory 3.
D/A the right eye visual image data 5312R read from 1R
Convert.

Similarly, the left eye visual image D/A section 45 outputs right eye visual image data 531.
Convert 2L to D/A. Right eye television signal generation unit 46
is the right-eye visual image signal 8 output by the right-eye visual image D/A unit 44.
44 and the decoded synchronization signal @5413 for right eye visual image display outputted from the timing signal generation section 41. Similarly, the left-eye television signal generation section 47 synthesizes the left-eye video signal 845 and the decoded synchronization signal 5414 for left-eye visual image display. The drive unit 331 sends a right-eye visual television signal 846, a left-eye visual television signal S47, a right-eye visual shutter release signal 5415, and a left-eye visual shutter release signal 5416 to the right-eye visual image display means 34 and the left-eye visual image, respectively. Display means 35, right eye shutter 36
and 391, and sends it to the left eye viewing shutters 37 and 392.

In the above, as the image display means 34 and 35, one whose display surface has the ability to retain shading information is used.

For example, development of flat panels and displays is progressing, and active matrix type liquid crystal televisions are being used as this means.

In addition, the display screen shutters 36 and 37 and the shutters 391 and 392 attached to the observer 38 are PL2T (P
ead LantFlanllll Zirconat
e Titanate) and liquid crystal.

Next, the operation of the apparatus of this embodiment having the above configuration will be explained. That is, the timing control unit 33 outputs the right-eye television signal S34, the left-eye television signal 835, the right-eye shutter release signal 836, and the left-eye shutter release signal at the timing shown in FIG. 3 or 4. 837 is output.

FIG. 3 shows an example where the right-eye visual image display and the left-eye visual image display are performed in the same phase, and FIG. 3(a) shows the timing of the vertical synchronization signal. The displayed image information is held on the display surface of the image display means 34 and 35, and the image is rewritten during the periods shown in FIG. 3(b) and FIG. 3(C). The right eye shutter 36°391 and the left eye shutter 37.392 are opened in Figures 3(d) and 5(e) after image rewriting.
).

Through the above operations, image information is held on the display surface of the image display means 34, 35, so that the entire image can be sufficiently viewed even if the shutter opening time is short.

FIG. 4 is an example of a case where the right-eye visual image display and the left-eye visual image display are performed in different phases. Figure (d) shows the vertical synchronization signal timing for left-eye visual image display. Compared to the case of FIG. 3, the shutter open time can be extended as shown in FIGS. 4(C) and 4(f).

In this way, in this embodiment, the image display means 34.3
Since the image information is held on the display screen of 5, the entire image can be seen even if the shutter is open for a short time, so the shutter can be opened for each field to avoid flickering to the viewer. It can be displayed visually, and the entire field image can be displayed in its entirety.

Although one embodiment of the present invention has been described above, it goes without saying that the present invention is not limited to the above-mentioned embodiment, and that various modifications can be made.

A simple modification is shown below.

In the above-mentioned embodiment, an example of a separate digital device was shown in which the image information to be displayed is stored as a digital value in the image memory 31. Stereoscopic display can be similarly performed using two television cameras or two VTRs that operate according to the instructions of the image display vertical signal shown in Figure (d).

Furthermore, if the display surface of the image display means 34, 35 is small, it is also possible to enlarge the image using an optical system. An example is shown in FIG. The image display plate 71 is the right eye visual image display means 3
4, a light source 72, 73 for respectively projecting a transmitted image on the display surface of the left eye visual image display means 35, a first mirror 74 for reflecting the left eye visual image, and a first mirror 74 for reflecting the left eye visual image, and a first mirror 74 for reflecting the left eye visual image. The second mirror 75 has the property of reflecting the image from the first mirror 74.
, an optical system 76 , and a screen 77 .

Image display means 34.35 and shutter means 36.37.
The configuration and operation of 39 are the same as described above. In the embodiment shown in FIG. 5, the observer 38 views the image enlarged and projected onto the screen 77 from the back side of the screen.

In addition, in the description of the embodiments so far, the image display means 34
．． The display screen 35 is configured to have display screen shutters 35 and 36 at the front, but the image display means 34 and 35 form a transmitted image on the display screen as shown in FIG. Light source 72.73 If the on/off operation of the light source can be controlled at high speed, the display surface shutter 3
Except for 6°37, the light source may be turned on instead when the display screen shutter is opened.

[Effects of the Invention] As detailed above, the present invention separately blocks light from the right eye and left eye of the observer, and synchronizes with the light blocking to create an image for right eye viewing and an image for left eye viewing. In a stereoscopic viewing device that allows the viewer to view images three-dimensionally by displaying images, the display surface is (l) Image display means for right eye viewing and left eye viewing having a function of retaining gradation information, display screen light shielding means for shielding each display surface of these image display means, and left and right eyes of the observer. and an observation area light shielding means for respectively blocking light from each other; outputting a visual image signal and a left eye image signal to the right eye image display means and the left eye image display means, respectively; It is configured to include a display screen light shielding means and a timing control means for controlling opening and closing of the visitor's eye light shielding means.

According to this configuration, if image information is held on the display surfaces of the image display means for right-eye viewing and left-eye viewing, the display surfaces of which have a function of holding gradation information, the shutter opening time is at least short. Therefore, it is possible to provide a stereoscopic viewing device that can display the entire field image and that does not cause flicker.

[Brief explanation of the drawing]

1 and 2 are block diagrams of a device according to an embodiment of the present invention, FIGS. 3 and 4 are operation timing diagrams of the device according to the embodiment, and FIG. 5 is a diagram for detailed explanation of the present invention. 6 are diagrams for explaining the configuration of a conventional stereoscopic viewing device, and FIG. 7 is an operation timing diagram in the conventional example. DESCRIPTION OF SYMBOLS 11... Right TV camera, 12... Left TV camera, 13... Timing control unit, 14... Subject, 1
5... CRT, 16... Light blocking device, 17... Right eye shutter, 18... Left eye shutter, 10... Observer, 331... Signal driver, 34... Right eye 'pA
Image display means, 35... Left eye visual image display means, 36...
Right display screen shutter, 37...Left display screen shutter,
38... Observer, 39... Shading device for inkstone observer, 39
DESCRIPTION OF SYMBOLS 1...Right eye'', /l Tsuta-1392...Left eye shirt-171...Image display device, 72...Light source for right display screen projection, 73...Light source for left display screen projection, 74...First mirror, 75...Second mirror, 76...Optical system, 77...Screen. Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 5 Figure 6

Claims (1)

[Claims] By shielding the observer's right eye and left eye separately and displaying an image for right eye viewing and an image for left eye viewing in synchronization with the shielding, the observer can view images three-dimensionally. In the stereoscopic viewing device, the display screen includes image display means for right-eye viewing and left-eye viewing, each of which has a function of retaining gradation information, and a display surface light-shielding device that blocks light from the display surface of each of these image display means. means and
An observer's eye light shielding means for shielding the left eye and right eye of the observer, and a right eye image signal and a left eye image signal are transmitted to the right eye image display means and the left eye image display means, respectively. 1. A stereoscopic viewing apparatus, comprising timing control means for outputting an image signal for displaying images and for controlling opening/closing of the display surface light shielding means and the observer's eye light shielding means.