JP2743588B2 - Three-dimensional display screen, three-dimensional display device, and driving method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional display screen, a three-dimensional display device without glasses using the same, and a method of driving the same.

[0002]

2. Description of the Related Art Stereoscopic display devices have been developed for a long time, and the mainstream of stereoscopic viewing is based on binocular parallax between the right and left eyes, and is mainly used with glasses. Not classified. In addition to this, those accompanied by movement of the display surface, or the hologram, and the levator up. Among them, those with movement of the display surface, or holograms etc. reproduce faithful stereoscopic display, but due to the large amount of information, it is difficult to display moving images etc. with current technology, and it is also possible to use simple devices. It is difficult to realize.

At present, a system utilizing only binocular parallax, which enables simple stereoscopic vision, has been put to practical use. The glass method in this blue red in anaglyph method for separation binocular parallax image, polarization method utilizing polarization of light or temporally switch the binocular video, a time division method or the like Vie glasses shutter There is. Further, the eyeglasses without method, and parallax stereogram method by screen plate 303 having a projection display apparatus 301 or the like and the interdigital monochrome pattern grid 302 as shown in FIG. 3, instead FIG interdigital grating 4 Screen provided with a lenticular lens 401 shown in FIG.
There is a lenticular method using the plate 402 and the like.

In the parallax stereogram system, a projection type display device 301 for the right eye and a left eye is used, and a screen plate 303 is passed through a grating 302 on the side of the projection type display device 301.
The right and left eye images are projected spatially alternately on top. This image is passed through the lattice 302 on the observer side, so that the right-eye image enters only the observer's right eye 304 and the left-eye image enters only the observer's left eye 305. In this way, the observer can perform stereoscopic viewing with binocular parallax. The same applies to the case of the lenticular method, the lenticular lens 401 is performing a semi-cylindrical lens algebraic fairly black and white pattern grid 302.

As described above, in the case of the Barallax stereogram method or the lenticular method, images for the right and left eyes are spatially separated and arranged.

[0006]

As described above in the case of a three-dimensional display device, it is difficult to achieve a real three-dimensional display such as a hologram by using current technology. However, entertainment, architectural design, medical use, CA
There is a strong demand for simple stereoscopic display devices for D and the like.

[0007] The spectacle method is troublesome to wear glasses,
In addition to the fundamental problem that there is a sense of incongruity, the current display device such as a television cannot be used as it is. No glass method is white in lenticular method white to parallax stereogram method, and right left eye image and the grating or lenticular lens of the display device because it is arranged spatially separated images for the right eye left eye as previously described Is required. For example, in order to correspond to a horizontal resolution of about 400 lines of a current 20-inch television, a registration of about 0.1 mm is required. This also requires a current display device such as a television to be improved and cannot be used as it is. Even if alignment is possible, it is difficult to attach / detach to / from the display device.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate such drawbacks and to provide a stereoscopic display screen and a stereoscopic display screen capable of easily performing stereoscopic viewing without using glasses and using the current display device such as a television. And a method of driving the same.

[0009]

A three-dimensional display screen according to the present invention is constructed by providing two electronic optical shutters each having a light transmission area divided into a plurality of interdigital lines on the front and back surfaces of a screen plate. , The two electronic optical switches
Ter is placed on every other of the plurality of interdigital lines
Form a light transmission area and a light blocking area, and
The plurality of blinds can be switched alternately
The shape line is the line of sight of either the right or left eye of the observer
Is the transmission area of the two electronic optical shutters over the entire surface.
At least part of the area is transmitted together and the other line of sight
Covers the entire surface of the two electronic optical shutters
It is formed so as to be shielded by at least one of the regions .
Further, the stereoscopic display device of the present invention may be configured such that the stereoscopic display screen alternately temporally alternates between right-eye and left-eye images.
It is installed on the front of the display surface of the display device that displays the information in an alternate manner. Further, in the stereoscopic display device of the present invention, the stereoscopic display screen temporally exchanges right-eye and left-eye images.
The display surface or display of the projection device that switches between and displays
It is installed in front of the surface . Furthermore, the driving method of a stereoscopic display device of the present invention, the stereoscopic display screen, right
Images for the eyes and left eye are alternately switched and displayed in time
Stereoscopic display device installed in front of the display surface of the
And the three-dimensional display screen for the right eye and the left eye
Of the projection device that alternately switches the images
For display surface or stereoscopic display device installed in front of display surface
In addition, the two electronic optical shutters provided on the front and back surfaces of the screen plate alternately change the light transmission area and the shielding area in synchronization with the switching of the right-eye and left-eye images.
Switch .

[0010]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram for explaining an embodiment of a stereoscopic display screen and a stereoscopic display device according to the present invention. In the configuration of FIG. 1, for example, a normal television using a cathode ray tube is used as the display device 101. On the display surface 102 of this television, two glass substrates with transparent electrodes , for example, twisted nematic liquid crystal on both surfaces of a screen plate 103
A three-dimensional display screen equipped with an electronic optical shutter 104 using a liquid crystal light valve with a liquid crystal light valve sealed in between and attached with a polarizing plate is attached. As the screen plate 103, for example, a normal glass or plastic plate is used. The liquid crystal is not limited to twisted nematic, and there is no particular problem with super twisted nematic or ferroelectric liquid crystal. Electronic light shutter 104 is not particularly necessary to separate each pixel, when attached to a television, vertically so as to form a interdigital lines, for example, rather than by if interdigital electrodes are provided, the liquid crystal Control the voltage applied to
With this, the light transmission area and the shielding area are set every other line.
Can be formed and their areas can be switched alternately
We use something that works . Such two electronic optical switches
The observer 104, as shown in FIG.
Line of sight over the entire surface, two electronic optical shutters 104
Of the left eye 106 of the observer.
Lines are shielded by two electronic optical shutters over the entire surface
Is formed so as to be blocked by at least one of
Of two electronic optical shutters 104 in a state like
Have been done. Also, two electronic optical shutters
The light source 104 has a plurality of interdigital transmission areas.
It is possible to switch the occluded area, and observer's left eye
Two electronic optical shutters with 106 lines of sight
And the right eye 10 of the observer.
5 lines of sight are two electronic optical shutters 10
Create a state where at least one of the four shielding areas is blocked
Can be In particular, the electronic optical shutters 10 on both sides of the screen plate 103 unless the direction of the observer's view is limited.
It is not necessary to perform alignment in the left-right direction of the display screen of No. 4 . There is no particular need to adjust the attachment of the three-dimensional display screen to a television or the like as described later. Although the liquid crystal light valve is used for the above-described three-dimensional display screen, the present invention is not limited to this, and an electronic optical shutter 104 using, for example, a PLZT electro-optical element may be used.

Next, a driving method and an operation principle of the stereoscopic display device shown in FIG. 1 will be described. For example, a display device 1 such as a television
01, the switch to the video temporally alternately for the right eye and the left eye
It is projected. As this video software, for example, a laser disk used in a liquid crystal eyeglass shutter system or the like is commercially available. In this case, the images for the right eye and the left eye are alternately displayed for each field . Electronic light shutter which in synchronism with provided on both surface of the screen plate 103
The operator 104 opens and closes. More specifically, FIG.
Is displayed on the display device 101 for the right eye.
The line of sight of the observer's right eye 105 is one line over the entire surface.
The light transmission area and the light blocking area
The light passes through the transmission area of the electronic optical shutter 104 together,
The line of sight of the left eye 106 of the observer is
At least one of the shielding areas of the optical shutter 104
Therefore, the observer can view only the right eye 105 of the observer with the right eye.
You will see the video for At this time, an image every other line comes into the eyes of the observer. Then, the next
A video for the left eye is displayed on the display device 101 in the field.
In synchronization with the two electronic shutters 104
One of, for example, an electronic optical shutter 104 on the observer side
Is switched between the light transmission area and the light shielding area. Then, observe
The gaze of the left eye 106 of the person is two electronic optical screens over the entire surface.
Both of which pass through the transmission area of the
The line of sight of the right eye 105 is two electronic light
In which at least one of the shielding areas of the
, And the observer uses only the observer's left eye 106 for the left eye.
You will see the video. Then display in the next field
In synchronization with the display of the right-eye image on the device 101,
Of the two electronic optical shutters 104, this time the display device
Light transmission area of the electronic optical shutter 104 on the device 101 side
And the shielding area. Then, the observer's right eye 105
Line of sight over the entire surface, two electronic optical shutters 104
Of the left eye 106 of the observer.
The line covers the entire surface of the two electronic optical shutters 104.
At least one of the concealed areas will be blocked,
The observer views the image for the right eye only with the observer's right eye 105.
Will be. Further, in the next field, the display device 10
1 in synchronization with the display of the left-eye image.
Of the sub-optical shutter 104, this time the electron on the observer side
It separates the light transmission and blocking areas of the
Replace. Then, the line of sight of the left eye 106 of the observer passes over the entire surface.
The transmission areas of the two electronic optical shutters 104 together.
It is transparent and the line of sight of the observer's right eye 105
At least the shielding area of the two electronic optical shutters 104
However, the observer is obstructed, and the observer sees the left eye of the observer.
The video for the left eye is seen only at 106. And
The right field image is displayed on the display device 101 in the next field.
Synchronized with the operation, two electronic optical shutters 104
Of which, this time, the electronic optical shutter on the display device 101 side
The light transmission area 104 and the light shielding area 104 are switched. This state
The state will return to the initial state shown in FIG.
Repeat the operation. In this way, stereoscopic viewing is possible by the principle of binocular parallax by allowing the right-eye and left-eye images to enter only the corresponding eyes. Here, the circumference of the interdigital line
Period and the pixel period of the display device 101 need to match.
No, and the position of the screen and display device for stereoscopic display
There is no need for alignment and the observer can see only one of the eyes
Image of the display device 101 through the electronic optical shutter 104
It is only necessary to be able to observe. Therefore, the screen for stereoscopic display
Accurate alignment when attaching to the display device 101
Is not required, so you can easily wear a three-dimensional display screen.
You can escape.

In FIG. 1, a normal television using a cathode ray tube has been described as the display device 101. However, the present invention is not limited to this, and a liquid crystal television which has recently been actively commercialized may be used. Further, an electroluminescence or plasma display may be used.

FIG. 2 is a configuration diagram for explaining another embodiment of the stereoscopic display device of the present invention. A projection display device 201 such as a cathode ray tube projector or a liquid crystal projector is used instead of the display device 101 such as a normal direct-view television shown in FIG. Switch for projection display device 201
If you use the clean separately, in front of the screen
As the screen plate 103 between the electronic optical shutters 104 arranged on the surface , for example, a normal glass or plastic plate is used, but as shown in FIG.
When 03 also serves as a display surface, a normal diffusion plate glass or a plastic plate provided with a Fresnel lens or the like is used. Other configurations and operation principles are as described above.

[0014]

As described above, according to the three-dimensional display screen, the three-dimensional display device using the same, and the method of driving the same according to the present invention, a display device such as a television generally used in a home or the like is used. Is mounted on the display surface of a three-dimensional display screen in which a glass plate or the like is sandwiched between two electronic optical shutters such as a liquid crystal light valve or an electro-optical element.
This makes it possible to easily make a normal television or the like a stereoscopic television device without glasses. In addition, by using this three-dimensional display screen as a screen of a projection display device such as a projector, there is an effect that a powerful three-dimensional image can be obtained on a large screen. Further, according to the driving method of the present invention, takes the right left eye image and video synchronization device such as a liquid crystal glasses shutter method which is currently commercially available electronic light shutter, optical interdigital line of electronic light shutter Toru
By simply switching between the over region and the occluded region, stereoscopic viewing based on the principle of the parallax stereogram is possible. Further, by simply attaching and detaching the three-dimensional display screen, there is a great effect that a normal television and a three-dimensional television can be seen at home. Also, as described above, since the three-dimensional display screen is made of a glass plate or a liquid crystal shutter, if mass-produced, it is possible to sufficiently reduce the price so that it is widely used in ordinary households.

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of an embodiment of a stereoscopic display device using a stereoscopic display screen of the present invention.

FIG. 2 is a basic configuration diagram of an embodiment of a stereoscopic display device using the stereoscopic display screen of the present invention.

FIG. 3 is a basic configuration diagram for explaining a conventional stereoscopic display method without glasses using only binocular parallax.

FIG. 4 is a basic configuration diagram for explaining a conventional stereoscopic display method without glasses using only binocular parallax.

[Explanation of symbols]

Reference Signs List 101 display device 102 display surface 103, 303, 402 screen plate 104 electronic optical shutter 105, 304 observer right eye 106, 305 observer left eye 201, 301 projection display device 302 interdigital black and white pattern lattice 401 lenticular lens

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04N 13/04 H04N 13/04

Claims (4)

(57) [Claims] 1. A is formed by providing a light transmissive region a plurality of partitioned into interdigital line the two an electronic light shutter on the front and back surfaces of the respective subscription <br/> over down plate, said two electronic light
The shutter is one of the plurality of interdigital lines.
Light transmission and shielding areas, and
It is possible to switch the area alternately,
The drooping line is either the right or left eye of the observer.
The line of sight is transmitted through the two electronic optical shutters over the entire surface.
Through at least a portion of the excess region and the other
The line of sight is blocked by the two electronic optical shutters over the entire surface.
Is formed so as to be shielded from at least one of the shielding areas.
Stereoscopic display screen, wherein Rukoto. Wherein the stereoscopic display screen,及right eye
A stereoscopic display device, wherein the stereoscopic display device is installed in front of a display surface of a display device that alternately and temporally switches and displays images for the left and right eyes. 3. The stereoscopic display screen according to claim 1, further comprising :
A stereoscopic display device , wherein the stereoscopic display device is provided on a display surface of a projection device that displays images for left and right eyes alternately and alternately with time , or on a front surface of the display surface . 4. A stereoscopic display screen for a right eye.
Table that alternates and displays the images for the
A stereoscopic display device installed in front of the display surface of the display device, and
The stereoscopic display screen is used for right-eye and left-eye images.
Of the projector that alternates and displays the time alternately
Surface or a stereoscopic display device installed in front of the display surface
The two electronic optical shutters provided on the front and back surfaces of the screen plate alternately cut the light transmitting region and the shielding region in synchronization with the switching of the right eye image and the left eye image.
A method for driving a three-dimensional display device, comprising: