JPH10123459A - Stereoscopic picture display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stereoscopic picture display device where the stereoscopic vision feasible range of the front and back and the right and left of the stereoscopic picture display device which does not use special spectacles is enlarged at comparatively low cost. SOLUTION: This device is provided with a liquid crystal panel 1 where a display screen is constituted of picture elements for a left eye and the picture elements for a right eye, a back light 2 provided on the light incident side of the liquid crystal panel 1, a light shielding plate 3 arranged between the back light 2 and the liquid crystal panel 1, a dispersion type liquid crystal panel 4 and a TN type liquid crystal panel 5 arranged on the light emission side of the liquid crystal panel 1, and the adequate visual interval distance of a stereoscopic picture is switched by switching the on/off of the diffusion effect of the dispersion type liquid crystal panel 4 and the on/off of the TN type liquid crystal panel 5.

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 capable of observing a three-dimensional image without using special glasses, and more particularly to observing a three-dimensional image even when an observer moves in the front-back direction. To provide a three-dimensional image display device capable of performing the following.

[0002]

2. Description of the Related Art Conventionally, as a device for displaying a stereoscopic image without using special glasses, a parallax barrier or a lenticular lens is arranged on a viewer side of a display screen of a display panel such as a liquid crystal panel, and the display screen is displayed. In some cases, light from a right-eye image and a left-eye image alternately displayed for each vertical line is separated so that a stereoscopic image can be viewed.

Also, a device for displaying a stereoscopic image without using special glasses by separating and inputting left-eye light and right-eye light to a transmissive display panel such as a liquid crystal panel. There is also.

In the above-described stereoscopic image display device, an optimum observation position such as an appropriate viewing distance of an observer is determined by a structure of the device. When the observer moves from the optimal observation position, it becomes impossible to observe a good stereoscopic image.

Japanese Patent Laid-Open Publication No. Hei 7-270745 (IPC: G02F) discloses a method of expanding a stereoscopic viewing area in front, rear, left and right of an observer.
1/13). This method includes means for detecting the position of the observer, and the observer's movement in the front-rear direction with respect to the display panel is handled by switching the light-shielding barrier. That is, as a light-shielding barrier that separates light from the left-eye pixel and light from the right-eye pixel,
An active barrier type element in which slits are formed and eliminated electrically is used, and the active barrier type element to be used is switched to cope with the movement of the observer in the front-back direction. Then, the movement of the observer in the left-right direction is coped with by a configuration in which the slit formation position of the active barrier type element is electrically moved.

[0006] However, in the method described above,
In order to realize a configuration in which the slit can be electrically moved in the horizontal direction, the configuration becomes very complicated and the cost increases. Furthermore, it is very difficult to manufacture an active-barrier type device by stacking it, which also increases the cost and is difficult to realize. Also, instead of laminating, TN
If the liquid crystal panels are simply stacked, there is a structural gap between the light-shielding barriers that is twice the thickness of the glass substrate used for the liquid crystal panels. There was a problem that would occur.

On the other hand, a method of detecting the position of the observer's head and expanding the stereoscopic viewable range with respect to the movement in the left-right direction is proposed in Japanese Patent Application No. 7-313389. This method corresponds to the position of the observer's head, switches between the right-eye image and the left-eye image on the display panel on the stereoscopic image display device without glasses, and enables stereoscopic images to be observed in the reverse viewing region even in the normal viewing region. This expands the viewing area. This method is very effective for the observer to move the display panel in the horizontal direction, and can greatly expand the observable range. However, this method has no effect on the forward and backward movement of the observer, and the stereoscopic viewable range in the forward and backward directions has not been improved.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and compares the front, rear, left, and right stereoscopic viewable ranges of a stereoscopic image display device without special glasses. It is an object of the present invention to provide a three-dimensional image display device which can be enlarged at extremely low cost.

[0009]

According to the present invention, there is provided a liquid crystal panel forming a display screen by a pixel group for the left eye and a pixel group for the right eye, and a flat panel provided on the light incident side of the liquid crystal panel. A light-emitting light source, a first light-shielding barrier arranged between the light source and the liquid crystal panel, and a light-shielding portion configured to generate or eliminate a binocular parallax effect, and a light-emitting side of the liquid crystal panel. A second light-shielding barrier disposed so as to be able to generate or eliminate a light-shielding portion that causes a binocular parallax effect, and the three-dimensional light-emitting device is configured by switching the generation of the light-shielding portions of the first and second light-shielding barriers. It is characterized in that a suitable inter-view distance of an image is switched.

It is preferable that the distance between the liquid crystal panel and the first light-blocking barrier is different from the distance between the liquid crystal panel and the second light-blocking barrier.

As described above, the gap between each light-shielding barrier and the liquid crystal panel can be finely adjusted by switching and selecting the light-shielding portions of the light-shielding barriers disposed on the light incident side and the light emission side of the liquid crystal panel. Fine adjustment of the distance becomes possible.

Further, the second light-shielding barrier can be constituted by a TN type liquid crystal panel, and the first light-shielding barrier is formed by a light-shielding plate having a vertical stripe-shaped light-shielding portion; And a dispersion-type liquid crystal panel disposed between the panels.

Further, the first light-shielding barrier may be constituted by a TN type liquid crystal panel.

Further, according to the present invention, the first light-shielding barrier comprises a light-shielding plate having a vertical stripe-shaped light-shielding portion, and a distributed liquid crystal panel disposed between the light-shielding plate and the liquid crystal panel. The second light-blocking barrier may be formed of a TN-type liquid crystal panel, and may be configured to change the luminance of the flat light source in conjunction with the generation and disappearance of the light-blocking portion by the TN liquid-crystal panel.

The brightness of the light source when the light-shielding portion of the TN liquid crystal panel is generated may be controlled so as to be about twice the brightness of the light source when the light-shielding portion of the TN liquid crystal panel disappears.

When the light-shielding barriers on the light incident side and the light emission side of the liquid crystal panel are switched between generating and extinguishing, light is absorbed by the black-stripe light-shielding portion of the TN-type liquid crystal panel, and the light-shielding portion is located at an appropriate viewing position. The luminance is reduced by half when the light is generated, and the observer feels uncomfortable. However, the light source is provided with a dimming function so that the luminance of the light source is increased about twice when the light-shielding portion is generated by the TN-type liquid crystal panel. Then, discomfort is reduced.

Further, the stereoscopic image display device of the present invention includes means for detecting the position of the observer, and the position information of the observer in the left-right direction corresponds to the position of the observer. The display is performed by switching between the left-eye pixel group and the right-eye pixel group on the display screen, and the generation of the light-shielding portions of the first and second light-shielding barriers is switched with respect to position information before and after the observer. In this way, the suitable viewing distance of the stereoscopic video is switched.

With the above-described configuration, it is possible to expand the stereoscopically viewable range with respect to the movement of the observer back and forth, right and left.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a configuration in a short-distance observation state according to the first embodiment of the present invention. FIG. 2 is a plan view showing a configuration in a long-distance observation state according to the first embodiment of the present invention. FIG. 3 is a block diagram showing the configuration of the stereoscopic video display device of the present invention.

In the three-dimensional image display device of the present invention, a light-shielding barrier is provided on the viewer 18 side with the liquid crystal panel 1 of the display panel interposed therebetween as a light-exiting-side image separating means. The light-shielding barriers on the light incident side are arranged between the light-shielding barriers. These two light-shielding barriers are configured so that the light-shielding portions can be turned on and off (generated and extinguished) as described later. In this embodiment, a TN-type liquid crystal panel 5 is used as a light-shielding barrier on the light incident side, and a light-shielding plate 3 and a dispersion-type liquid crystal panel 4 that is a diffusion effect ON / OFF panel are used as light-shielding barriers on the light emitting side. Have been. Then, the TN type liquid crystal panel 5 is used as a light shielding barrier for a long distance, and the light shielding plate 3 is used as a light shielding barrier for a short distance.

The distance between the light-shielding plate 3 and the liquid crystal panel 1, the light-shielding portion of the TN type liquid crystal panel 5, and the liquid crystal panel 1
Are arranged so as to be different from each other, so that an appropriate viewing distance between the liquid crystal panels 1 of the observer is different. In this embodiment, the light shielding plate 3 is positioned at the appropriate viewing distance D.
1 for short distance observation, the TN type liquid crystal panel 5 has an appropriate viewing distance D2
For long distance observation.

The liquid crystal panel 1 includes a light incident side glass substrate 11, a light emitting side glass substrate 12, and these substrates 11,
It has a liquid crystal layer 13 provided between them, a light incident side polarizing plate 14 attached to the light incident side glass substrate 11, and a light emitting side polarizing plate 15 attached to the light emitting side glass substrate 12. The liquid crystal panel 1 is driven by, for example, a matrix driving method, and an image is displayed by applying a voltage to a transparent pixel electrode (not shown) according to an image signal. Then, by processing the video signal supplied to the liquid crystal panel 1, the image R for the right eye and the image L for the left eye are alternately displayed every other vertical line.

The light-shielding plate 3 is provided on the upper surface of the glass substrate 31 (the surface facing the liquid crystal panel 1) in the form of a vertical stripe-shaped light-shielding portion 3.
a and the openings 3b are formed alternately in the horizontal direction. The light-shielding part 3a and the opening part 3b are formed so as to slit the light from the backlight 2 and separate the light transmitted through the liquid crystal panel 1 into left and right lights and to give the light to the left and right eyes 18L and 18R of the observer 18. At a pitch of The light-shielding portion 3a is arranged so that two display pixels correspond to one opening 3b. Further, the light shielding portion 3a is composed of a reflection film 32 and a light absorption film 33. The reflection film 32 is formed on the glass substrate 31, and the light absorption film 33 is formed on the reflection film 32. That is, the reflection film 32 is formed on the side receiving the light from the backlight 2. As a material for forming the reflection film 32, for example, Al (aluminum) or the like is used, and as a material for the light absorption film 33, chromium oxide or the like is used. Then, the vertical stripe-shaped light shielding portion 3 is formed.
a and the opening 3b are formed by first depositing a material for forming the reflective film 32 on the upper surface of the glass substrate 31, then depositing a material for forming the light absorbing film 33, and removing a portion to be the opening 3b by etching. Can be formed.

The dispersion type liquid crystal panel 4 disposed between the liquid crystal panel 1 and the light shielding plate 3 includes a light incident side transparent sheet 41,
It is composed of a light emitting side transparent sheet 42 and a dispersion type liquid crystal layer 43 provided between these sheets 41, 42. Here, as the dispersion type liquid crystal, there is a liquid crystal in which a liquid crystal molecular mass is mixed in a polymer, or a polymer dispersion type liquid crystal in which a liquid crystal is dispersed in a networked polymer, and a voltage is applied to the liquid crystal material. A type that transmits light when applied and scatters light when no voltage is applied, or
Conversely, it transmits light when no voltage is applied,
Any type that scatters light when a voltage is applied may be used. The dispersion type liquid crystal panel 4 includes a not-shown full-surface transparent electrode (for example, ITO), and the diffusion effect is turned on or the diffusion effect is turned off by applying the voltage.

The TN type liquid crystal panel 5 as a light shielding barrier disposed on the light emission side of the liquid crystal panel 1 has a liquid crystal layer 53 provided between two glass substrates 51 and 52,
The light exit side polarizing plate 54 is provided on the side. Also, T
The polarizing plate on the light incident side of the N-type liquid crystal panel 5 shares the polarizing plate 15 of the liquid crystal panel 1 for forming an image. In the liquid crystal panel 5, transparent electrodes such as ITO are patterned on the inner surfaces of the glass substrates 51 and 52, and electrically shield the light shielding portions 50a.
Can be turned on and off. The light-shielding portion 50a is turned on such that one opening 50b corresponds to two display pixels of the liquid crystal panel 1, and separates the light transmitted through the liquid crystal panel 1 into left and right, so that the image for the left eye can be viewed by the observer. 18
The image for the right eye is provided to the left eye 18L of the observer to the right eye 18R of the observer, respectively.

FIG. 3 is a block diagram showing the configuration of the stereoscopic video display device of the present invention. Sensor 10 for detecting the position of an observer observing a stereoscopic image displayed on liquid crystal panel 1
1 is supplied to a position detection control circuit 102. The position detection control circuit 102 detects whether the observer is at a short-distance observation position or a long-distance inspection position, based on the output of the sensor 101, and determines the position. Information is provided to the light-shielding barrier control circuits 103 and 104, respectively. Further, the position detection control circuit 102 detects whether the position of the observer's head is in the normal viewing area or the reverse viewing area based on the output from the sensor 101, and outputs a control signal corresponding to that area to the display circuit 100. Give to.

The display circuit 100 generates a left-eye video signal and a right-eye video signal to be displayed on the liquid crystal panel 1, respectively.
It is given to the liquid crystal panel 1. When the observer's head is in the emmetropic region, the display circuit 100 displays a left-eye image and a right-eye image on the liquid crystal panel 1 based on the output from the position detection control circuit 102, as shown in FIGS. Is displayed, and when the observer's head is in the reverse viewing area, the liquid crystal panel 1 is output based on the output from the position detection control circuit 102.
Is supplied by switching between a left-eye image and a right-eye image.

The light-shielding barrier control circuits 103 and 104
Is controlled by the output from the position detection control circuit 102 to use the short-distance observation light-shielding barrier 106 when the observer is at the short-distance observation position, and to control the long-distance observation light-shielding barrier when the observer is at the long-distance observation position. Control is performed so as to use 105.

That is, when the observer is at the short-distance observation position D1, as shown in FIG.
The light diffusion barrier control circuit 104 controls the dispersion type liquid crystal panel 4 so as to turn off the diffusion effect and maintain the effect of the light shielding plate 3. In this embodiment, since the diffusion effect is turned off when a voltage is applied to the dispersion type liquid crystal panel 4, a voltage is applied to the dispersion type liquid crystal panel 4.

The light-shielding portion 50a of the TN-type liquid crystal panel 5 as the light-shielding barrier 105 for long-distance observation is electrically turned off.
The liquid crystal panel 5 is turned off so that the state becomes F. In this embodiment, when the liquid crystal panel 5 is turned on, the light shielding portion 50a is formed. Therefore, the light-shielding barrier control circuit 103 does not apply a voltage to the liquid crystal panel 5 and makes the entire liquid crystal panel 5 in a transmission state.

As described above, by setting the light blocking barrier 106 on the light incident side of the liquid crystal panel 1 to the ON state and setting the light emitting side light blocking barrier 105 to the OFF state, the observer 18 can control the light incident side light blocking plate 3. By the action, stereoscopic vision becomes possible at the illustrated observation distance D1.

Next, the observer moves away from the position shown in FIG.
The case where the user is at the perspective distance observation position D2 will be described. At this time, as shown in FIG. 2, the dispersion type liquid crystal panel 4 is turned on, and the dispersion type liquid crystal panel 4 is turned on so that the light separated by the light shielding plate 3 is dispersed by the dispersion type liquid crystal panel 4. The control circuit 104 controls. That is, the application of the voltage to the dispersion type liquid crystal panel 4 is stopped so that the diffusion effect is turned on, and the light shielding plate 3 is turned off for the liquid crystal panel 1.

The light-shielding portion 50a of the TN-type liquid crystal panel 5 as the long-range observation light-shielding barrier 105 is electrically
The state is set to the N state, and the light shielding portion 50a of the black stripe is generated.
Therefore, the light-shielding barrier control circuit 103 applies a voltage to the TN-type liquid crystal panel 5 to form a light-shielding portion 50 a on the liquid crystal panel 5.

As described above, by setting the light-shielding barrier 105 on the light emission side of the liquid crystal panel 1 to the ON state and setting the light-shielding barrier 106 on the incident side to the OFF state, the observer 18 can operate the light-shielding barrier 105 on the light emission side. By the action, stereoscopic vision becomes possible, and observation can be performed at the position D2 as shown in FIG. 2 due to the positional relationship between the light shielding portion 50a and the liquid crystal panel 1.

The movement of the observer's head to the left and right with respect to the liquid crystal panel 1 is dealt with by switching between the image for the display circuit 100 and the image for the left eye. Further, as described above, when the observer observes the observer at a short distance in the vicinity of D1 with respect to the movement of the observer in the front-rear direction, as shown in FIG. Is turned on, the light-shielding barrier 105 on the light-emitting side is turned off, and when the observer observes at a long distance near D2, the light-shielding barrier 106 on the light-incident side of the liquid crystal panel 1 is turned off as shown in FIG. By turning on the light-shielding barrier 105 on the light emitting side in the state, stereoscopic viewing is possible in the two front and rear regions. Therefore, the stereoscopic viewable range is doubled in the front-back direction.

In the above embodiment, the liquid crystal panel 1
The light-shielding barriers 106 and 105 on the light incident side and the light output side
When switching to N-OFF, the ON / OFF of the light-shielding barrier 106 on the light incident side of the liquid crystal panel 1 is ON-OFF of the diffusion effect by the dispersion type liquid crystal panel 4 arranged on the front surface, so that the light use efficiency is reduced. There is no change, and the change in luminance by itself is small. However, the ON / OFF of the light blocking barrier 105 on the light emission side of the liquid crystal panel is determined by the T
Since the black stripe light-shielding portion 50a is turned on and off by the N-type liquid crystal panel 5, light is absorbed, and at an appropriate viewing position, the brightness is reduced by half when the light-shielding portion 50a is turned on. Would. Therefore, the backlight 2 is provided with a dimming function, and the brightness of the backlight 2 becomes 2 when the light shielding portion 50a is turned on by the TN type liquid crystal panel 5.
If it is increased about twice, the sense of discomfort is reduced.

Next, a second embodiment of the present invention will be described with reference to FIGS. For convenience of description, the same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted to avoid duplication of description.

FIG. 4 is a plan view showing a configuration in a short distance observation state according to the second embodiment of the present invention, and FIG. 5 is a view showing a configuration in a long distance observation state according to the second embodiment of the present invention. It is a top view. The difference between the second embodiment and the first embodiment is that a TN type liquid crystal panel is used as the light blocking barrier 106 on the light incident side of the liquid crystal panel 1.

The TN type liquid crystal panel 6 as a light shielding barrier 106 disposed on the light incident side of the liquid crystal panel 1 has a liquid crystal layer 63 provided between two glass substrates 61 and 62, and has a liquid crystal layer 63 on the backlight 2 side. A light incident side polarizing plate 64 is provided. The polarizing plate on the light emitting side of the TN type liquid crystal panel 6 shares the polarizing plate 14 on the light incident side of the liquid crystal panel 1 for forming an image. This TN type liquid crystal panel 6 has a glass substrate 61,
A transparent electrode such as ITO is patterned on the inner surface of 62, so that the light-shielding portion 60a can be electrically turned on and off. The light-shielding portion 60a is turned on such that one opening 60b corresponds to two display pixels of the liquid crystal panel 1, and separates light transmitted through the liquid crystal panel 1 into right and left.
The image for the left eye is given to the left eye 18L of the observer 18, and the image for the right eye is given to the right eye 18R of the observer.

The distance between the light-shielding portion 60a of the TN-type liquid crystal panel 6 as a light-shielding barrier and the liquid crystal panel 1 and the distance between the light-shielding portion 50a of the TN-type liquid crystal panel 5 and the liquid crystal panel 1 are different from each other. In addition, the suitable viewing distance between the liquid crystal panels 1 of the observer is different. In this embodiment, the TN-type liquid crystal panel 6 is for short-distance observation with an optimum viewing distance of D1, and the liquid crystal panel 5 is for long-distance observation with an optimum viewing distance of D2.

When the observer is at the short-distance observation position D1, as shown in FIG. 4, the liquid crystal panel 6 is turned on so that the light shielding portion 60 of the short-distance liquid crystal panel 6 is electrically turned on.
Set to N state. In this embodiment, the liquid crystal panel 6 is
When the state is set to the N state, the light shielding portion 60a is formed. The light-shielding barrier control circuit 104 applies a voltage to the liquid crystal panel 6 to form a light-shielding portion 60a on the liquid crystal panel 6.

Further, the light shielding portion 5 of the liquid crystal panel 5 for a long distance.
0a is turned off so that the liquid crystal panel 5 is electrically turned off.
Set to FF state. In this embodiment, when the liquid crystal panel 5 is turned on, the light shielding portion 50 is formed. Therefore, the light-shielding barrier control circuit 103 does not apply a voltage to the liquid crystal panel 5 and makes the entire liquid crystal panel 5 in a transmission state.

As described above, the light shielding portion 60a of the TN type liquid crystal panel 6 on the light incident side of the liquid crystal panel 1 is turned on, and the light shielding portion 50a of the TN type liquid crystal panel 5 on the light emitting side is turned off. The observer 18 is provided with the light shielding portion 60 on the light incident side.
By the operation of a, stereoscopic vision becomes possible at the illustrated observation distance D1.

Next, the observer moves away from the position shown in FIG.
The case where the user is at the perspective distance observation position D2 will be described. At this time, as shown in FIG. 5, the TN liquid crystal panel 6 is turned off so that the light shielding portion 60a of the TN liquid crystal panel 6 is turned off electrically. That is, the light-shielding barrier control circuit 104 does not apply a voltage to the TN type liquid crystal panel 6 and makes the entire liquid crystal panel 6 in a transmission state.

Further, the light shielding portion 5 of the liquid crystal panel 5 for a long distance.
0a is electrically turned on, and the black stripe light shielding portion 5
0a is generated. Therefore, the light-shielding barrier control circuit 103
Applies a voltage to the TN-type liquid crystal panel 5 to form a light shielding portion 50a on the liquid crystal panel 5.

As described above, the light shielding portion 50a of the TN type liquid crystal panel 5 on the light emission side of the liquid crystal panel 1 is turned on, and the light shielding portion 60a of the TN type liquid crystal panel 6 on the light incidence side is turned off. The observer 18 is provided with the light-shielding portion 50 on the light emission side.
By the action of a, stereoscopic vision becomes possible,
a and the liquid crystal panel 1 as shown in FIG.
Observation can be performed at position 2.

In the second embodiment, ON-OFF of the light-shielding portions on the light incident side and the light emitting side of the liquid crystal panel 1 is performed.
Are performed by the same operation, the change in display luminance with respect to the movement of the light-shielding portion is small, and it is not necessary to adjust the backlight 2 as in the above-described first embodiment.

Further, the movement of the observer in the left-right direction may be handled by switching between the right-eye image and the left-eye image in the display circuit 100, as in the first embodiment.

In each of the above embodiments, a case has been described in which the light-shielding portion of one of the light-shielding barriers is turned on to stereoscopically view the three-dimensional image displayed on the liquid crystal panel 1. When observing a two-dimensional image, it is possible to cope with the two light-shielding barriers by making the two light-shielding barriers transparent and displaying a two-dimensional image on the liquid crystal panel 1.

[0050]

As described above, according to the present invention, a light-shielding barrier capable of turning on and off a light-shielding portion on each of the light incident side and the light emitting side of the liquid crystal panel with respect to the front-back movement of the observer is provided. By selectively selecting the light-shielding portion, fine adjustment of the gap between each light-shielding barrier and the liquid crystal panel becomes possible, that is, fine adjustment of the appropriate viewing distance of each light-shielding barrier becomes possible. As a result, it is possible to realize a stereoscopically viewable range approximately twice as large in the front-back direction as the conventional device. Further, by responding to the movement of the observer in the left and right direction by switching the left and right images, the suitable viewing range can be relatively easily expanded.

As described above, according to the present invention, the stereoscopic viewable range in a stereoscopic video display device that does not use special glasses can be extended in the front, rear, left, and right directions.

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration in a short distance observation state according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a configuration in a long-distance observation state according to the first embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a stereoscopic video display device of the present invention.

FIG. 4 is a plan view showing a configuration in a short distance observation state according to a second embodiment of the present invention.

FIG. 5 is a plan view showing a configuration in a long-distance observation state according to a second embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 liquid crystal panel 2 backlight 3 light shielding plate 4 dispersion type liquid crystal panel 5 TN type liquid crystal panel 6 TN type liquid crystal panel

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[Procedure amendment]

[Submission date] February 24, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction contents]

In the three-dimensional image display device of the present invention, a light-shielding barrier is provided on the viewer 18 side with the liquid crystal panel 1 of the display panel interposed therebetween as a light-exiting-side image separating means. The light-shielding barriers on the light incident side are arranged between the light-shielding barriers. These two light-shielding barriers are configured so that the light-shielding portions can be turned on and off (generated and extinguished) as described later. In this embodiment, a TN-type liquid crystal panel 5 is used as a light-shielding barrier on the light emission side, and a light-shielding plate 3 and a dispersion-type liquid crystal panel 4 that is a diffusion effect ON / OFF panel are used as light-shielding barriers on the light incidence side. Have been. Then, the TN type liquid crystal panel 5 is used as a light shielding barrier for a long distance, and the light shielding plate 3 is used as a light shielding barrier for a short distance.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction contents]

The right and left movements of the observer's head with respect to the liquid crystal panel 1 are handled by the display circuit 100 by switching between a right-eye image and a left-eye image. Further, as described above, when the observer observes the observer at a short distance in the vicinity of D1 with respect to the movement of the observer in the front-rear direction, as shown in FIG. Is turned on, and the light-shielding barrier 105 on the light emission side is turned off.
In the case of observation at a long distance in the vicinity, as shown in FIG. 2, the light-shielding barrier 106 on the light-incident side of the liquid crystal panel 1 is turned off and the light-shielding barrier 105 on the light-emitting side is turned on, so that the two Stereoscopic vision becomes possible in the area. Therefore, the stereoscopic viewable range is doubled in the front-back direction.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0042

[Correction method] Change

[Correction contents]

Further, the light shielding portion 5 of the liquid crystal panel 5 for a long distance.
0a is turned off so that the liquid crystal panel 5 is electrically turned off.
Set to FF state. In this embodiment, when the liquid crystal panel 5 is turned on, the light shielding portion 50a is formed. Therefore, the light-shielding barrier control circuit 103 does not apply a voltage to the liquid crystal panel 5 and makes the entire liquid crystal panel 5 in a transmission state.

Claims (10)

[Claims] 1. A liquid crystal panel forming a display screen by a pixel group for the left eye and a pixel group for the right eye, a light source provided on a light incident side of the liquid crystal panel and emitting light in a plane, and the light source A first light-shielding barrier that is arranged between the liquid crystal panel and a light-shielding portion that generates a binocular parallax effect and is configured to be able to generate or disappear; and a first light-shielding barrier that is arranged on the light emission side of the liquid crystal panel, and has a binocular parallax effect. A second light-shielding barrier configured so that a light-shielding portion to be generated can be generated or disappeared, and switching the generation of the light-shielding portions of the first and second light-shielding barriers to switch an appropriate viewing distance of a stereoscopic image. A stereoscopic video display device characterized by the above-mentioned. 2. The three-dimensional structure according to claim 1, wherein a distance between the liquid crystal panel and the first light shielding barrier is different from a distance between the liquid crystal panel and the second light shielding barrier. Video display device. 3. The three-dimensional image display device according to claim 1, wherein the second light-shielding barrier is formed of a TN-type liquid crystal panel. 4. The light-shielding barrier according to claim 1, wherein the first light-shielding barrier includes a light-shielding plate having a vertical stripe-shaped light-shielding portion, and a dispersion-type liquid crystal panel disposed between the light-shielding plate and the liquid crystal panel. The stereoscopic video display device according to any one of claims 1 to 3, wherein: 5. The three-dimensional image display device according to claim 1, wherein the first light-shielding barrier is formed of a TN liquid crystal panel. 6. The stereoscopic image display device according to claim 4, wherein the light-shielding portion of the light-shielding plate is formed by a reflection layer on a light source side and a light absorption layer on a liquid crystal panel side. 7. The first light-shielding barrier includes a light-shielding plate having a vertical stripe-shaped light-shielding portion, and a dispersed liquid crystal panel disposed between the light-shielding plate and the liquid crystal panel. 2. The three-dimensional solid-state display device according to claim 1, wherein the second light-blocking barrier is formed of a TN-type liquid crystal panel, and changes the luminance of the light source in conjunction with the generation and disappearance of a light-blocking portion by the TN liquid-crystal panel. Video display device. 8. The brightness of the light source when the light-shielding portion of the TN liquid crystal panel is generated is about twice the brightness of the light source when the light-shielding portion of the TN liquid crystal panel disappears. 3. The stereoscopic video display device according to 1. 9. By switching between generation of a light-shielding portion of only one of the first and second light-shielding barriers and extinction of both light-shielding portions of the first and second light-shielding barriers, The three-dimensional image display device according to claim 1, wherein switching between display of a three-dimensional image and display of a two-dimensional image is performed. 10. A device for detecting a position of an observer,
With respect to the position information of the observer in the left-right direction, the display is performed by switching between the left-eye pixel group and the right-eye pixel group on the display screen of the liquid crystal panel in accordance with the position of the observer. 2. The stereoscopic image display according to claim 1, wherein the suitable inter-view distance of the stereoscopic image is switched by switching the generation of the light-shielding portions of the first and second light-shielding barriers for the position information before and after. apparatus.