JPH08149520A - Stereoscopic video image display device - Google Patents

Abstract

PURPOSE: To provide a stereoscopic video image display device with a wide viewing enable areas for a plane or a stereoscopic video image by a viewer by arranging a diffusion plate dispersing a transmitted light to a light output side of a display section. CONSTITUTION: A 2nd diffusion plate 10 is provided on a screen 9 and the light output side of a 2nd lenticular plate 5. Then video image lights for left and right eyes projected from 1st and 2nd projectors 1L, 1R are converged by a 1st lenticular plate 4 and the image is formed as a left eye picture element image L and a right eye picture element image R extended in a stripe shape in the vertical direction on the 1st diffusion plate 6. Furthermore, a light L1 from the left eye picture element image L and the light R1 from the right eye picture element image R are separated horizontally by the 2nd lenticular plate 5. Then the lights L1, R1 separated horizontally by the end lenticular plate 5 pass through a 2nd diffusion plate 10, where its directivity is weakened and divergent a little. Thus, the area of proper vision for eyes of a viewer is made wider.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic image display device which allows an observer to observe a stereoscopic image without using special glasses.

[0002]

2. Description of the Related Art Conventionally, as a means for displaying a stereoscopic image, as disclosed in Japanese Patent Laid-Open No. 3-65943, a left eye image and a right eye image are separated by a lenticular lens in the shape of a kamaboko. There is a stereoscopic image display device without glasses that allows an observer to recognize a stereoscopic image.

This stereoscopic image display device without glasses is shown in FIG.
As shown in FIG. 2, when two projectors (projection devices) are used, a left-eye image from the first projector 1L and a right-eye image from the second projector 1R are displayed on the screen 2 including a lenticular lens. The image is projected and separated into a left-eye image and a right-eye image by the spectral effect of the screen 2, and the left and right eyes of the observer 3 are made to enter the light respectively so that the observer recognizes a stereoscopic image.

The screen 2 has a first lenticular plate 4 arranged on the light incident side (light incident side) and a second lenticular plate (spectral portion) arranged on the light emitting side (light emitting side).
5, a left-eye pixel image L vertically arranged in a stripe pattern and a right-eye pixel image R vertically arranged in a stripe pattern are alternately formed in the horizontal direction. 1 diffuser plate (display unit) 6.

In addition, the first and second projectors 1
The distances between the L and 1R projection lenses are separated by a distance (an odd multiple of the eye distance) corresponding to the eye distance (about 65 mm) of the observer.

The first and second projectors 1L, 1R
The light of the projected image is converged by the first lenticular plate 4 and left and right as a pixel image L for the left eye and a pixel image R for the right eye that extend in a vertical stripe pattern on the diffusion plate 6. Images are alternately formed in each direction. The light from the pixel image L for the left eye and the light from the pixel image for the right eye are
The left and right eyes are separated by the second lenticular plate 5 and enter the left and right eyes of the observer 3, respectively.

However, in the above-mentioned conventional stereoscopic image display device, as shown in FIG. 9, due to the light converging action of the first lenticular plate 4, the pixel image for the left eye is formed on the first diffusion plate 6. L and the pixel image R for the right eye are formed with a narrow width. Therefore, the regions 7L and 7R where the light from the pixel images L and R reach the left and right eyes of the observer 3 through the second lenticular plate 5 are very narrow regions, and a stereoscopic image can be well observed. The proper viewing position is a very narrow area. The area 8 other than the areas 7L and 7R is a black area in which an image is not displayed, and when the eyes of the observer 3 are located in this area 8, the observer cannot recognize a stereoscopic image. For this reason, the observer needs to observe the stereoscopic image in a very cramped posture because the movement of the head is restricted.

Further, in the case of the stereoscopic image display device as described above, by making the images projected from the first and second projectors 1L and 1R exactly the same, a normal flat image (two-dimensional image) can be obtained. ) Can be switched to display.

However, also when displaying this plane image, the suitable viewing position where the plane image can be satisfactorily observed becomes a very narrow region, and the observer needs to observe the plane image in a very cramped posture. .

Further, in the stereoscopic image display device shown in FIG. 8, a parallax barrier plate is arranged on the light outgoing side of the first diffusion plate 6 instead of the second lenticular plate 5, and the pixel image L for the left eye is arranged. There is also a stereoscopic image display device having a structure in which the light from the right eye and the light from the pixel image R for the right eye are separated into left and right.

Even in such a stereoscopic image display device,
Similarly to the stereoscopic image display device shown in FIG. 9 described above, light from the pixel image L for the left eye and the pixel image R for the right eye reaches the left and right eyes of the observer through the parallax barrier plate. The region becomes a very narrow region, and the suitable viewing position where a stereoscopic image can be satisfactorily observed becomes a very narrow region. For this reason, the observer needs to observe the stereoscopic image or the planar image in a very cramped posture because the movement of the head is restricted.

Also, without using the first lenticular 4,
Also in a stereoscopic image display device in which the light of the image for the left eye and the light of the image for the right eye are projected by one projector,
On the first diffusion plate 6, a black matrix portion such as a liquid crystal panel for displaying an image in the projector is projected. Therefore, the black matrix portion becomes a region similar to the black region 8 described above, and the proper viewing position where a stereoscopic image can be satisfactorily observed becomes a very narrow region.

[0013]

SUMMARY OF THE INVENTION The present invention has been made in view of the drawbacks of the above-mentioned conventional example, and separates the light from the pixel image for the left eye and the light from the pixel image for the right eye into left and right. It is possible to provide a stereoscopic image display device in which a black region in which an image generated when the image is displayed is small or eliminated, and an observer can satisfactorily observe a stereoscopic image or a planar image and which has a wide suitable viewing position. It is intended.

[0014]

A first stereoscopic image display device of the present invention includes a display section for displaying left eye pixels and right eye pixels, and light from the left eye pixels. The light emitting device further includes a spectroscopic unit that separates light from the right-eye pixel into right and left portions, and a diffusion plate that disperses transmitted light is disposed on the light output side of the display unit.

Specifically, the diffusion plate is arranged on the light output side of the spectroscopic unit. Further, the diffusion plate is disposed on the light incident side of the spectroscopic unit.

A second stereoscopic image display device of the present invention is a projection unit for projecting light of a left-eye image and light of a right-eye image, and a left-eye image from the projection unit. From the pixel image for the left eye and the display unit for alternately forming the image light for the right eye and the light for the image for the right eye in the left-right direction to display the pixel image for the left eye and the pixel image for the right eye. In a projection type including a spectroscopic unit that splits the light of the right eye and the light from the pixel image for the right eye into right and left,
A diffusion plate that disperses transmitted light is disposed on the light incident side of the display unit.

A third stereoscopic image display device of the present invention is a projection unit for projecting light of a left-eye image and light of a right-eye image, and a left-eye image from the projection unit. From the pixel image for the left eye and the display unit for alternately forming the image light for the right eye and the light for the image for the right eye in the left-right direction to display the pixel image for the left eye and the pixel image for the right eye. In a projection type stereoscopic image display device including a spectroscopic unit that separates the light of the right eye and the light from the pixel image for the right eye into left and right, and transmits the transmitted light to the light exit side or the light entrance side of the projection lens of the projection unit. It is characterized by arranging a diffusing plate.

[0018]

According to the configuration of the first three-dimensional image display device of the present invention, the light from the pixel for the left eye and the light from the pixel for the right eye are dispersed when passing through the diffusion plate. The suitable viewing position where the light from the left-eye pixel and the light from the right-eye pixel are favorably incident on the left and right eyes of the observer is widened.

Specifically, when the diffusing plate is arranged on the light output side of the spectroscopic section, the light from the left and right pixels separated into the right and left by the spectroscopic section is diffused, and the left and right eyes of the observer are observed. In addition, the optimum viewing position where the light from the left-eye pixel and the light from the right-eye pixel are favorably incident is expanded.

Further, when the diffusion plate is arranged on the light incident side of the spectroscopic unit, the light from the right and left pixels is incident on the spectroscopic unit in a diffused state and is split into the left and right.
The suitable viewing position where the light from the left-eye pixel and the light from the right-eye pixel are favorably incident on the left and right eyes of the observer is widened.

Further, according to the configuration of the second stereoscopic image display device of the present invention, since the lights of the left and right images projected from the projection unit are imaged in a diffused state, the imaged pixel image is formed. Spreads, and the suitable viewing position where the light from the left-eye pixel and the light from the right-eye pixel respectively enter the left and right eyes of the observer satisfactorily spreads.

Further, according to the third stereoscopic image display device of the present invention, since the light of the left and right images in the diffused state is emitted from the projection unit, the formed pixel image spreads,
The suitable viewing position where the light from the left-eye pixel and the light from the right-eye pixel are favorably incident on the left and right eyes of the observer is widened.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a diagram showing the configuration of the stereoscopic image display device of the present embodiment. The same parts as those in FIG. 8 are designated by the same reference numerals, and the description thereof will be omitted.

In the stereoscopic image display device of this embodiment, the screen 9 is provided with the second diffusion plate 10 on the light outgoing side of the second lenticular plate 5. The second diffusion plate 10 is made of a polyester film having a thickness of about 50 to 300 μm, which is hard-coated on the surface thereof, or a glass plate having a roughened surface.

FIG. 2 is a diagram showing the construction of the screen 9 in detail. First lenticular plate 4 and first diffuser plate 6
And are separated by a predetermined distance by an air layer 11,
Both the first diffuser plate 6 and the second lenticular plate 5 are air layers 1
2 are arranged at a predetermined distance. Further, the second diffusion plate 10 is in contact with the surface of the second lenticular plate 5 on the emission side, that is, the most projecting portion of the lenticular lens surface.

In the stereoscopic image display apparatus of the present embodiment as described above, the light of the left-eye and right-eye images projected by the first and second projectors 1L and 1R is the first lenticular. A left-eye pixel image L and a right-eye pixel image R that are converged by the plate 4 and extend vertically in a stripe shape on the first diffusion plate 6 are alternately formed in the left-right direction. Then, the light L1 from the pixel image L for the left eye and the light R1 from the pixel image R for the right eye are separated into the right and left by the second lenticular plate 5.

When the light beams L1 and R1 separated into the right and left by the second lenticular plate 5 pass through the second diffuser plate 10, they are directed by the second diffuser plate 10 as shown in FIG. The sex is weakened, and a small amount is released. Therefore, the region of the proper viewing position where the light L1 and R1 are incident on the left and right eyes of the observer becomes wide.

4 to 7 are views showing the structure of a screen of a stereoscopic image display device according to another embodiment. In the screen 13 of the embodiment shown in FIG. 4, the second diffusion plate 10 is formed on the light-incident side surface of the second lenticular plate 5. In this case, the light from the pixel image L for the left eye and the pixel image R for the right eye formed on the diffuser plate 6 has its directivity weakened by the second diffuser plate 10 and is a little diverged light. In this state, the second lenticular plate 5 separates the left and right sides. Therefore, even in this case, the pixel images L and R are displayed on the left and right eyes of the observer.
The region of the proper viewing position where the lights from the respective light beams are favorably incident is widened.

In the screen 14 of the embodiment shown in FIG.
Light from the left and right pixel images L and R formed on the first diffusion plate 6 is separated into left and right by a parallax barrier plate 15 having a light shielding portion (barrier portion) 15a. The second diffusion plate 10 is formed on the light exit side surface of the Lux barrier plate 15. In this case, the light from the pixel images L and R separated by the parallax barrier plate 15 to the left and right is weakened in directivity by the second diffusion plate 10 and diverges slightly. Therefore, the pixel images L and R are displayed on the left and right eyes of the observer.
The region of the proper viewing position where the lights from the respective light beams are favorably incident is widened.

In the screen 16 of the embodiment shown in FIG.
The second diffusion plate 1 is provided on the light-incident side surface of the first lenticular plate 4.
0 is formed. In this case, the light of the left and right images from the first and second projectors 1 and 2 has its directivity weakened by the second diffusion plate 10 and becomes a light with a small amount of divergence. Since it is converged by the lenticular plate 4, the left and right pixel images L and R formed on the first diffusion plate 6 are formed.
Is expanded. For this reason, the region of the proper viewing position, where the light from the pixel images L and R is favorably incident on the left and right eyes of the observer, respectively, is widened by the second lenticular plate 5.

In the screen 17 of the embodiment shown in FIG. 7,
The second diffuser plate 1 is provided on the surface of the first lenticular plate 4 on the light outgoing side.
0 is formed. In this case, the light rays of the images from the first and second projectors 1 and 2 which are converged by the first lenticular plate 4 are weakened in directivity by the second diffusion plate 10 and are slightly diffused. Therefore, the left and right pixel images L and R formed on the first diffusion plate 6 are expanded. For this reason, the region of the proper viewing position, where the light from the pixel images L and R is favorably incident on the left and right eyes of the observer, respectively, is widened by the second lenticular plate 5.

Further, in all of the above-described embodiments, the images projected from the first and second projectors 1L and 1R are made to be exactly the same, so that switching is performed so as to display a normal plane image. Also in this case, due to the same operation as in the case of the above-described three-dimensional image display, the suitable viewing position where the light from the pixel image of the first diffusion plate 6 favorably enters the left and right eyes of the observer becomes wide.

Although all the above-mentioned embodiments are projection type stereoscopic image display devices using a projector, the left and right pixels are displayed on a display device such as a liquid crystal panel and the light from these pixels is lenticular. Even in a direct-view type stereoscopic image display device that is separated into a left side and a right side by a lens plate or a parallax barrier plate, the light exit side or the light entrance side of the lenticular lens plate arranged on the light exit side of the display device, or the light exit side of the parallax barrier plate. By arranging the above-mentioned second diffusing plate in the above, the same effect as that of the above-mentioned embodiment can be obtained.

In the case of a projection type stereoscopic image display device using a projector, the above-mentioned second diffusion plate 10 may be arranged on the light exit side or the light entrance side of the projection lens of the projector. In this case, the light of the image emitted from the projection lens has its directivity weakened by the second diffusing plate 10 and becomes a slightly divergent light, and the pixel image formed on the first diffusing plate 6 spreads. It becomes a thing. Therefore, the suitable viewing position where the light from the pixel image is favorably incident on the left and right eyes of the observer is widened by being separated by the second lenticular plate 5.

[0035]

According to the present invention, the light from the pixel for the left eye and the light from the pixel for the right eye, which are separated into the left and right, are appropriately incident on the left and right eyes of the observer, respectively. It is possible to provide a stereoscopic image display in which the viewing position is widened and an observer can view a stereoscopic image or a planar image in a comfortable posture.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a stereoscopic image display device of the present invention.

FIG. 2 is a diagram showing a configuration of a screen of the present invention.

FIG. 3 is a diagram showing a divergent state of light on the diffusion plate of the present invention.

FIG. 4 is a diagram showing a configuration of a screen according to another embodiment of the present invention.

FIG. 5 is a diagram showing a configuration of a screen according to another embodiment of the present invention.

FIG. 6 is a diagram showing a configuration of a screen according to another embodiment of the present invention.

FIG. 7 is a diagram showing a configuration of a screen according to another embodiment of the present invention.

FIG. 8 is a diagram showing a configuration of a stereoscopic image display device.

FIG. 9 is a diagram showing a conventional stereoscopic image display device.

[Description of sign]

 1L 1st projector (projection part) 1R 2nd projector (projection part) 5 2nd lenticular plate (splitting part) 6 1st diffuser plate (display part) 10 2nd diffuser plate (diffusion plate) L Left Pixel image for the eye R Pixel image for the right eye

Claims (5)

[Claims] 1. A display unit that displays left-eye pixels and right-eye pixels, and a spectroscope that separates light from the left-eye pixels and light from the right-eye pixels into left and right. A three-dimensional image display device including a section, and a diffusion plate that disperses transmitted light is disposed on the light output side of the display unit. 2. The stereoscopic image display device according to claim 1, wherein the diffusion plate is disposed on the light output side of the spectroscopic unit. 3. The stereoscopic image display device according to claim 1, wherein the diffusion plate is disposed on a light incident side of the spectroscopic unit. 4. A projection unit for projecting the light of the image for the left eye and the light of the image for the right eye, and the light of the image for the left eye and the light of the image for the right eye from said projection unit. A display unit that alternately forms images in the left-right direction and displays a pixel image for the left eye and a pixel image for the right eye,
In a projection type stereoscopic image display device including a spectroscopic unit that separates the light from the pixel image for the left eye and the light from the pixel image for the right eye into left and right, transmitted light on the light incident side of the display unit. A projection-type three-dimensional image display device, characterized in that a diffusion plate for dispersing the light is arranged. 5. A projection unit for projecting the light of the image for the left eye and the light of the image for the right eye, and the light of the image for the left eye and the light of the image for the right eye from said projection unit. A display unit that alternately forms images in the left-right direction and displays a pixel image for the left eye and a pixel image for the right eye,
In a projection type stereoscopic image display device including a spectroscopic unit that separates light from the pixel image for the left eye and light from the pixel image for the right eye into left and right sides, a light exit side of a projection lens of the projection unit or A projection-type three-dimensional image display device, characterized in that a diffusion plate that disperses transmitted light is disposed on the light incident side.