JP2957887B2 - Projection type stereoscopic image display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection type stereoscopic image display device for projecting and displaying a stereoscopic image on a screen by a projector or the like, and a projector device suitable for displaying a stereoscopic image.

[0002]

2. Description of the Related Art Conventionally, as a means for displaying a three-dimensional image, as disclosed in Japanese Patent Application Laid-Open No. 3-65943, a double lenticular plate comprising two lenticular plates each having a lenticular lens having a semi-cylindrical shape is used. There is a projection type stereoscopic image display device without glasses that separates an image for a left eye (at a first viewpoint) and an image for a right eye (at a second viewpoint) by a screen and allows an observer to recognize a stereoscopic image. .

In the projection type stereoscopic image display device without glasses, when displaying a stereoscopic image of two eyes, as shown in FIG. 4, an image for the left eye from the first projector 1L and an image for the left eye from the second projector 1R. The right-eye image is projected onto a lenticular screen 2 composed of a lenticular lens, separated into a left-eye image and a right-eye image by the spectral effect of the screen 2, and allowed to enter the left and right eyes of the observer 3, respectively. Makes the observer recognize the stereoscopic image.

The above double lenticular screen 2
Has a structure in which a pair of identical lenticular plates 4 and 5 are arranged via a diffusion layer 6.

However, in the projection type stereoscopic image display apparatus using the double lenticular screen as described above, when displaying a stereoscopic image of, for example, two eyes (two viewpoints), an image for the left eye is always projected. 1st projector 1L and 2nd projector 1R which projects the image for right eyes
And two projectors are required.

Moreover, these two projectors 1 are usually
It is necessary to set the distance d between the L and 1R projection lenses to a predetermined distance (specifically, an odd multiple of the distance between human eyes). For this reason, there is a problem that the configuration becomes complicated, and it takes time to arrange the projectors and the like.

In order to display a stereoscopic image with four eyes using a double lenticular screen, four projectors are required. To display a stereoscopic image with eight eyes, a stereoscopic image with eight eyes is required. Eight projectors are required.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks of the prior art, and has as its object to provide a projection type stereoscopic image display apparatus in which the number of necessary projectors is reduced. It is.

It is another object of the present invention to provide a projector device that performs the functions of a plurality of projectors.

[0010]

A projection type stereoscopic image display apparatus according to the present invention comprises a first pixel having video information at a first viewpoint and a second pixel having video information at a second viewpoint. And a first spectral component formed on the emission side of the display panel for separating first pixel light from the first pixel and second pixel light from the second pixel. Means,
A first projection lens unit that receives the first pixel light and projects it outside, a second projection lens unit that receives the second pixel light and projects outside, and the first image light And the second
And a screen for forming an image by separating the image light with a lenticular plate disposed on the incident side.

Further, in the projection type stereoscopic image display device of the present invention, one projector is constituted by the display panel, the first spectral unit, the first projection lens unit, and the second projection lens unit. The apparatus is characterized in that the apparatus is configured.

Further, in the projection type stereoscopic image display device of the present invention, the distance between the first projection lens unit and the second projection lens unit is an odd multiple of the distance between human eyes. And

Further, in the projection type stereoscopic image display device of the present invention, the first spectral means is a lenticular plate.

Further, in the projection type stereoscopic image display device of the present invention, the first spectroscopic means is a parallax barrier plate.

[0015] In the projection type stereoscopic image display apparatus according to the present invention, the image formed on the screen may be divided into an image light at a first viewpoint and an image light at a second viewpoint on an emission side of the screen. And a second light splitting means for splitting light into light.

Further, in the projection type stereoscopic image display device of the present invention, the second spectroscopic means is a lenticular plate.

Further, in the projection type stereoscopic image display device according to the present invention, the second spectral means is a parallax barrier plate.

Further, the projector device of the present invention has a first
A display panel for displaying a first pixel having video information and a second pixel having second video information; and a first panel formed on an emission side of the display panel and passing through the first pixel. A first splitting unit that separates the pixel light from the second pixel light passing through the second pixel, a first projection lens unit that receives the first pixel light and projects the light outside, And a second projection lens unit that receives the second pixel light and projects it to the outside.

Further, in the projector device according to the present invention, a light source for emitting light incident on the display panel is arranged at an equal position with respect to the first and second projection lens units. .

Further, in the projector device according to the present invention, the first projection lens section is located on the optical axis of the first light source, and the second projection lens section is located on the optical axis of the second light source. It is characterized by doing.

[0021]

According to the above arrangement, the first projection lens unit and the second
The first projection lens unit and the second projection lens in advance at a position where the first pixel light and the second pixel light separated by the first spectral unit have a desired interval. The first and second video lights emitted from the first and second projection lens units are imaged at desired positions on the screen.

Further, the first and second projection lens units are
By disposing them in one projector device, the first and second projection lens units can be moved while the distance between the first and second projection lens units is maintained at a desired distance.

Further, by setting the distance between the first and second projection lens units to be an odd multiple of the distance between human eyes, the first and second image lights are equal to the distance between human eyes. The first image light and the second
Image light is satisfactorily incident.

A lenticular plate or a parallax barrier plate is suitable as the first spectral means. In particular, in the case of a lenticular plate, light from the first and second pixels is not cut off. In addition, since the first and second projection lens units are fixed at optimal positions, a large amount of pixel light can be always incident on the first and second projection lens units, and the stereoscopic image is reduced in luminance. Is suppressed.

By providing the second dispersing means on the exit side of the screen, the first and second image lights formed on the screen are well separated as first and second pixel image lights. .

A lenticular plate or a parallax barrier plate is suitable as the second spectral means.

Further, in the projector device having the above configuration,
One type projects two types of pixel light, the first image light and the second image light, and the number of projectors can be reduced.

Further, by arranging the light source at an equal position with respect to the first and second projection lens units, the amounts of light incident on the first and second projection lens units become equal, and an image is formed on a screen. The first and second pixel images thus obtained have the same luminance, and the first and second pixel image lights having substantially the same amount of light enter the left and right eyes of the observer.

Further, on the optical axes of the first and second light sources, respectively,
By arranging the first and second projection lens units, the amount of light incident on the first and second projection lens units can be increased, and the brightness of the image projected on the screen is improved.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing the overall configuration of a twin-lens projection type stereoscopic image display apparatus according to the first embodiment.

In the figure, reference numeral 7 denotes a first projection unit 8L for projecting a left-eye image and a second projection unit 8R for projecting a right-eye image.
And a projector device having: Reference numeral 2 denotes a double lenticular screen, the structure of which is the same as that of FIG. 4, and the same parts are denoted by the same reference numerals.

FIG. 2 is a diagram showing the internal configuration of the projector device 7. As shown in FIG.

9 is a light source such as a metal halide lamp, 10
Is a reflector for reflecting light from the light source 9, and 11 is a liquid crystal panel arranged on the light emitting side of the light source 9.
Although the liquid crystal panel 11 is schematically illustrated, a pixel L ′ for the left eye is disposed between the incident side substrate 11a and the exit side substrate 11b.
And a right-eye pixel R ′ are displayed. The left-eye pixel L ′ and the right-eye pixel R ′ are such that a pixel row in which pixels L ′ are arranged in the vertical direction and a pixel row in which pixels R ′ are arranged in the vertical direction are 1 in the horizontal direction. It is formed alternately for each pixel column.

On the light emitting side surface of the light emitting side substrate 11b,
Lenticular plate 12 provided with lenticular lens 12a
(First spectral means) is attached. The lenticular lens 12a is a semi-cylindrical lens extending in the vertical direction, and substantially one set of left and right pixel columns is arranged in one lens 12a.

The light emitted from the light source 9 enters the liquid crystal panel 11 directly or after being reflected by the reflector 10. The light incident on the liquid crystal panel 11 is divided into pixel light 13L for the left eye that has passed through the pixel L ′ for the left eye and right eye that has passed the pixel R ′ for the right eye due to the light separating action of the lenticular lens 12a. And the pixel light 13R.
Then, the pixel light 13L for the left eye is supplied to the first projection lens unit 8
L, and the pixel light 13R for the right eye enters the second projection lens unit 8R.

Each of the projection lens units 8L and 8R has a projection lens group (not shown) provided therein, and the distance d between the lens centers of each projection lens group is the distance between human eyes (for example, 65 mm). It is designed to be.

The first and second projection lens units 8L and 8R
Are lenticular screens 2 as shown in FIG.
The image light 14L for the left eye composed of the pixel light 13L for the left eye and the image light 14R for the right eye composed of the pixel light 13R for the right eye are enlarged and projected.

In the lenticular screen 2, a pixel image L for the left eye and a pixel image R for the right eye are formed on the diffusion layer 6 by the light condensing action of the lenticular plate 4 on the incident side, and the lenticular on the exit side. The light is separated into the left-eye pixel image light 15L and the right-eye pixel image light 15R by the spectral action of the lens plate 5 (second spectral means).

As a result, an area 16L in which the pixel image light 15L for the left eye enters and an area 16R in which the pixel image light 15R for the right eye enters at the optimum viewing position are formed. The person 3 observes the image for the left eye with the left eye, observes the image for the right eye with the right eye, and recognizes a stereoscopic image by binocular parallax.

In the three-dimensional image display apparatus of the first embodiment as described above, the image light 1 for the left eye is
4L and the image light 14R for the right eye are projected to display a two-lens stereoscopic image, and two projectors are not required unlike the related art.

In addition, the first of the projector devices 7,
Since the distance d between the lens centers of the second projection lens units 8L and 8R is set in advance to be the distance between human eyes,
By roughly arranging the projector device 7, the image light 14L for the left eye and the image light 14R for the right eye are projected toward the lenticular screen 2 at desired intervals. Therefore, unlike the related art, there is no need to strictly arrange the projectors, and the stereoscopic video display device can be configured without any trouble.

Next, a second embodiment of the present invention will be described.

FIG. 3 is a diagram showing the internal configuration of a projector device used in the projection type stereoscopic image display device of the second embodiment. The same parts as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted. .

In the drawing, 9a is a first light source, 10a is a reflector for reflecting light from the first light source 9a, 9b is a second light source, and 10b is light for reflecting light from the second light source 9b. It is a reflector. A line 17a connecting the first light source 9a and the first projection lens unit 8L;
b and the line 17b connecting the second projection lens unit 8R to the first and second light sources 9a and 9b so as to intersect diagonally.
Is located. The reflector 10a has a curved surface such that the optical axis of the first light source 9a is the line 17a, and the reflector 10b is curved such that the optical axis of the second light source 9b is the line 17b. Is formed. That is, the first light source 9a is connected to the first projection lens unit 8
The second light source 9b is disposed on the optical axis of the second projection lens unit 8R.

In the projection type stereoscopic image display apparatus of the second embodiment, there are first and second light sources 9a and 9b and two light sources, and the first and second projection lens sections 8L and 8R are provided. Since they are arranged on the optical axes of the first and second light sources 9a and 9b, higher brightness can be achieved as compared with the projection type stereoscopic image display device of the first embodiment.

Further, the first and second light sources 9a and 9b are respectively connected to the optical axes 17 of the first and second projection lens units 8L and 8R.
a, 17b, the projection lens unit 8
Light is evenly incident on L and 8R, the luminance of the image for the left eye and the luminance of the image for the right eye are almost equal, and the observer does not feel discomfort due to the difference in luminance between the left and right images.

The first and second embodiments described above are two-lens type stereoscopic image display devices. In the case of a four-lens type, for example, in the case of a four-lens type, the liquid crystal panel 11 in the projector device has one lenticular lens 12a. The display is performed so that four pixel rows with different viewpoints are located, and four image lights passing through the four pixels are separated by a lenticular lens 12a, and projection lens units are respectively provided at four positions where the four image lights are incident. May be arranged.

It is not necessary that the number of the projection lens units and the number of the light sources coincide with each other, and it suffices that the projection lens units be configured so that light is uniformly incident on each projection lens unit.

In the above-described embodiment, a single-panel type liquid crystal projector in which one liquid crystal panel is arranged in one projector device is used. However, three primary colors of red, green and blue are provided in one projector device. In a three-panel type liquid crystal projector in which three liquid crystal panels are arranged corresponding to light, a lenticular lens plate 12 may be attached to the emission side substrate 11b of each liquid crystal panel.

Although not particularly shown, the first and second beam splitting means may be constituted by parallax barrier plates instead of the lenticular plates 12 and 5.

[0052]

According to the present invention, the projector can be moved while maintaining the distance between the first projection lens unit and the second projection lens unit at a desired distance, thereby facilitating the arrangement of the projector. And a projection type stereoscopic image display device that can be performed at a time.

Further, according to the present invention, in addition to the above-described effects, a single projector can project the first pixel light and the second pixel light, thereby reducing the number of projectors. A display device may be provided.

Further, according to the present invention, in addition to the above-described effects, it is possible to effectively use pixel light from the display panel, and to provide a projection type stereoscopic image display device in which stereoscopic images have high luminance.

Further, according to the present invention, it is possible to provide a projector device which can perform a plurality of functions by one device.

Further, according to the present invention, in addition to the above-described effects, the light amounts of the image light from the first projection lens unit and the image light from the second projection lens unit are substantially equal, and the viewer And a projector device capable of displaying a good image that can be observed without discomfort by inputting substantially the same amount of image light to the eyes of the subject.

Further, according to the present invention, in addition to the above-described effects, the first image light emitted from the first projection lens unit and the second image light emitted from the second projection lens unit are generated. It is possible to provide a projector device capable of increasing the amount of light and displaying a high-luminance image.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of a stereoscopic video display device of the present invention.

FIG. 2 is a diagram illustrating an internal configuration of a projector device used in the stereoscopic image display device according to the first embodiment of the present invention.

FIG. 3 is a diagram illustrating an internal configuration of a projector device used in a stereoscopic image display device according to a second embodiment of the present invention.

FIG. 4 is a diagram showing an entire configuration of a conventional stereoscopic video display device.

[Description of sign]

Claims (11)

(57) [Claims] 1. A display panel for displaying a first pixel having video information at a first viewpoint and a second pixel having video information at a second viewpoint, and a display panel formed on an emission side of the display panel. A first spectral unit that separates first pixel light from the first pixel and second pixel light from the second pixel;
A first projection lens unit that receives the first pixel light split by the first splitting unit and projects the first pixel light to the outside as a first image light; and a second projection lens unit split by the first splitting unit. A second method in which pixel light is incident and projected outside as a second image light
A projection lens unit, and a screen that separates and forms an image by separating the first image light and the second image light by a lenticular plate disposed on the incident side. . 2. The projector according to claim 1, wherein the display panel, the first spectral unit, the first projection lens unit, and the second projection lens unit constitute one projector device. 2. The projection type stereoscopic image display device according to 1. 3. The projection type according to claim 1, wherein a distance between the first projection lens unit and the second projection lens unit is an odd multiple of a distance between human eyes. 3D image display device. 4. The projection type stereoscopic image display device according to claim 1, wherein said first spectral means is a lenticular plate. 5. The projection type stereoscopic image display device according to claim 1, wherein the first spectral unit is a parallax barrier plate. 6. A screen according to claim 1, further comprising: a second light splitting means for splitting an image formed on the screen into a first pixel image light and a second pixel image light on an emission side of the screen. The projection type stereoscopic image display device according to claim 1, 2, 3, 4, or 5. 7. The projection type stereoscopic image display device according to claim 6, wherein said second spectral means is a lenticular plate. 8. The three-dimensional image display device according to claim 6, wherein said second spectral means is a parallax barrier plate. 9. A display panel for displaying a first pixel having first video information and a second pixel having second video information, and the first panel formed on an emission side of the display panel, A first splitting unit that separates first pixel light passing through a pixel from second pixel light passing through the second pixel;
A projector device comprising: a first projection lens unit that receives the above pixel light and projects the same to the outside; and a second projection lens unit that receives the second pixel light and projects the outside. 10. The projector device according to claim 9, wherein a light source that emits light incident on the display panel is disposed at an equal position with respect to the first and second projection lens units. . 11. The apparatus according to claim 1, wherein the first projection lens unit is located on an optical axis of a first light source, and the second projection lens unit is located on an optical axis of a second light source. Item 11. The projector device according to item 9 or 10.