JPH08146347A - Color stereoscopic picture display device - Google Patents

Abstract

PURPOSE: To show a natural color stereoscopic picture which does not give rough feeling by arranging color filters on optical paths passing openings of an optical path control plate and increasing areas through which light beams pass without using a special electronic element and mechanical mechanism. CONSTITUTION: Red color filters, green color filters and blue color filters are arranged in a nest on a color filter plate 12. Longitudinally long slits are formed at parts opposed to respective color generation positions of red colors, green colors and blue colors displayed on a color picture display part 13 in a slit plate (an optical path control plate) 11 and shielding parts are formed in parts other than that parts. When respective pixels on the color picture display part 13 are allowed to generate color and for example, a red color light is displayed, the red color light passes the slit 32 of the slit plate 11 corresponding to the pixel concerned. Then, only the red color light is selected by the red color filter of the color filter plate 12 in front of the slit 32 and the selected red color light is made incident on the right eye or the left eye of a viewing person.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color stereoscopic image display device for displaying a color stereoscopic image without requiring special glasses.

SUMMARY OF THE INVENTION The present invention uses a pinhole plate having a plurality of pinholes or a slit plate having a plurality of slits for transmitting / blocking light, and is displayed on the back surface thereof. By selecting the image light and transmitting it to the front side, without special glasses such as polarizing glasses, in a color stereoscopic image display device for stereoscopically viewing a color image, in each of the pinholes or slits,
Overlaying color filters that pass only light of a specific wavelength,
By making each pinhole or each slit wavelength-selective, the image light displayed on the back surface passes through a separate pinhole or slit for each wavelength, thereby opening the pinhole plate or slit plate. The ratio is increased so that a color stereoscopic image that is easy to see is shown.

[0003]

2. Description of the Related Art Pinholes, vertical stripe slits,
A color stereoscopic image display device that shows a color stereoscopic image without wearing special glasses such as polarized glasses by using a means that partially transmits light and shields light at other parts is , There is a part that looks black because the light is blocked.

Further, there is a pinhole or slit portion where the intensity of light is extremely strong between the black portions, and there is a drawback that a rough screen appears as a visual impression.

As a technique for solving this problem, the position of the pinhole is cyclically changed with the passage of time, as in the "three-dimensional stereoscopic image display device" disclosed in Japanese Patent Laid-Open No. 6-160770. However, there has been proposed a technique that equivalently increases the area through which light passes by utilizing the afterimage effect of the eye.

[0006]

By the way, in such a conventional three-dimensional stereoscopic image display device, the position of the pinhole or the slit must be changed with time, so that the passage / blocking of light can be performed at high speed. A switchable electronic element or mechanical mechanism is required.

However, it is difficult to obtain or manufacture such an electronic element or mechanical mechanism at low cost, and the electronic circuit for controlling these electronic element or mechanical mechanism becomes complicated. Therefore, there is a problem in that the cost of the entire device increases.

In view of the above circumstances, the present invention provides a pinhole or slit with wavelength selectivity, and separates pinholes or slits for each wavelength to allow passage through separate pinholes or slits, thereby forming a special and expensive electronic element or mechanical mechanism. Without using, you can increase the area through which light passes and avoid the presence of extremely strong light in the black area to show a natural color stereoscopic image. An object is to provide a color stereoscopic image display device.

[0009]

In order to achieve the above object, the present invention provides, in claim 1, in a surface for shielding light.
In a color stereoscopic image display device having a large number of circular or non-circular optical path control plates on which small openings or transparent portions are formed, and a color image display unit arranged on the back surface of the optical path control plate and displaying a color image, On the optical path that passes through the opening or the transparent portion of the optical path control plate, a color filter that allows only light of a specific wavelength to pass is arranged, and from each of the opening or the transparent portion, among the light emitted in the color image display unit. The feature is that light of a color corresponding to a specific wavelength is emitted.

According to a second aspect of the present invention, in the color stereoscopic image display device according to the first aspect, a narrow-width vertical stripe-shaped opening or a transparent portion is arranged in the light shielding surface as the optical path control plate. It is characterized by using a slit plate.

According to a third aspect of the present invention, in the color three-dimensional image display device according to the first aspect, the light path control plate is a pin in which an opening having a small diameter or a transparent portion is arranged in a light shielding surface. It is characterized by using a hole plate.

Further, in claim 4, claim 1 or 2,
In the color stereoscopic image display device described in any one of 3 above, a display device that emits red, green, and blue light by itself is used as the color image display unit.

Further, in claim 5, claim 1 or 2,
3. The color stereoscopic image display device according to any one of 3 above, wherein a display device that emits red, green, and blue light by adjusting the intensity of light incident from the back surface is used as the color image display unit. I am trying.

Further, in claim 6, claim 1 or 2,
In the color stereoscopic image display device described in any one of 3), as the color image display unit, a display device that displays red, green, and blue images on a rear projection screen by a projector is used.

[0015]

In the above structure, according to claim 1, an optical path control plate having a large number of circular or non-circular small openings or transparent portions formed in a light-shielding surface, and a rear surface of the optical path control plate. In a color stereoscopic image display device that is arranged and has a color image display unit that displays a color image,
On the optical path that passes through the opening or the transparent portion of the optical path control plate, a color filter that allows only light of a specific wavelength to pass is arranged, and from each of the opening or the transparent portion, among the light emitted in the color image display unit. By emitting light of a color corresponding to a specific wavelength, the aperture or the transparent portion has wavelength selectivity, and by passing through the aperture or the transparent portion for each wavelength, a special and expensive electronic element or Increases the area through which light passes without using a mechanical mechanism, avoids the presence of extremely strong light in the black areas, and displays a natural color stereoscopic image that is not rough. .

According to a second aspect of the present invention, in the color stereoscopic image display device according to the first aspect, as the optical path control plate, a vertical stripe-shaped opening having a narrow width or a transparent portion is arranged in a light shielding surface. By using the slit plate,
By making the slits wavelength-selective and passing different slits for each wavelength, the area through which light passes can be increased without using special and expensive electronic elements or mechanical mechanisms, and Avoid the presence of extremely strong light inside to show a natural color stereoscopic image that is not rough.

According to a third aspect of the present invention, in the color three-dimensional image display device according to the first aspect, the light path control plate is a pin in which an opening having a small diameter or a transparent portion is arranged in a light shielding surface. By using a hole plate,
By providing pinholes with wavelength selectivity and passing through different pinholes for each wavelength, the area through which light passes can be increased without the use of special and expensive electronic elements or mechanical mechanisms. Avoid the presence of extremely strong light in some parts, and show a natural color stereoscopic image without roughness.

Further, in claim 4, claim 1 or 2,
3. The color stereoscopic image display device according to any one of 3 above, wherein a pinhole or slit has wavelength selectivity by using a display device which itself emits red, green, and blue light as the color image display unit. , For each wavelength,
By passing through separate pinholes or slits, the area through which light passes is increased without using special and expensive electronic elements or mechanical mechanisms, and in the black portion,
Avoid the presence of extremely strong light and show a natural color stereoscopic image.

Further, in claim 5, claim 1 or 2,
In the color stereoscopic image display device according to any one of 3 above, by using a display device that emits red, green, and blue light by adjusting the intensity of light incident from the back surface as the color image display unit, By making the pinholes or slits have wavelength selectivity and passing through different pinholes or slits for each wavelength, the area through which light passes can be increased without using special and expensive electronic elements or mechanical mechanisms. Let's avoid the presence of extremely strong light in the black area, and show a natural color stereoscopic image without roughness.

Further, in claim 6, claim 1 or 2,
3. The color stereoscopic image display device according to any one of 3 above, wherein as the color image display unit, a display device that displays red, green, and blue images on a rear projection screen by a projector is used. By giving the slit wavelength selectivity and passing through different pinholes or slits for each wavelength, the area through which light passes can be increased without using special and expensive electronic elements or mechanical mechanisms. Avoid the presence of extremely strong light in the black areas and show a natural color stereoscopic image that is not rough.

[0021]

FIG. 1 is a block diagram showing an embodiment of a color stereoscopic image display device according to the present invention.

The color stereoscopic image display device shown in FIG.
A shielding part that shields light and an opening (slit) that allows light to pass through
Slit plate 11 in which and are alternately formed at predetermined intervals,
A color filter plate 12 that is arranged in a nested manner and has a color filter that passes only red light, a color filter that passes only green light, and a color filter that passes only blue light and that is arranged on the front side of the slit plate 11. And the slit plate 11 for generating light emitted from each slit.
And a color image display unit 13 arranged on the back side of the.

In this case, the color image display unit 13 is a color display device capable of reproducing natural colors by using the three primary colors of red, green and blue, such as a normal color television device or a plasma display device. , Red, green, blue color display at different positions,
Or, such as a screen illuminated by a three-tube video projector, it is composed of a color display device that emits red, green, and blue colors at the same position. Displayed in a shape.

Further, as shown in FIG. 2, the slit plate 11 is provided with a vertically long slit 21 at a portion facing each of the red, green and blue color forming positions displayed on the color image display section 13, It is composed of a plate-like member having a shield portion 22 formed on the other portion, receives the red, green, and blue light displayed on the color image display portion 13 and also has a slit corresponding to each color. To be incident on the color filter plate 12.

As shown in FIG. 3, the color filter plate 12 has a red filter 23 which passes only red light and a green light which passes only red light in order from the leftmost end at positions corresponding to adjacent slits 21 of the slit plate 11. Green filter 2 to pass
4, a blue filter 25 that passes only blue light is arranged, and these red filter 23 and green filter 2 are arranged.
4. Among the slits 21 formed on the slit plate 11 by the blue filter 25, among the lights emitted from the corresponding slits 21, only red light, only green light, and only blue light are selected. Then, this is emitted to the front surface.

Next, with reference to the schematic diagram shown in FIG. 4 and the schematic diagram shown in FIG. 5, the principle of displaying a stereoscopic image in this embodiment will be described. In the following description, different numbers are given to the slits 21, the red filters 23, the green filters 24, and the blue filters 25 for the sake of clarity.

First, if each pixel on the color image display section 13 is made to display a color of red light, the slit plate 11
Of the slits 21 formed on the color filter plate 12 passing through the slit corresponding to the pixel emitting the red light, for example, the slit 32 as shown in FIG. Only the red light is selected by the red filter 31 of 1., and is incident on the right eye or the left eye of the viewer.

At this time, paying attention to the portion of the color image display portion 13 included in the angle θ seen from the slit 32 on the back surface of the red filter 31 which is provided on the color filter plate 12 and allows only the red light to pass therethrough. θ is the maximum value of the angle that does not overlap the range expected from the slits 33 and 34 closest to the slit 32 among the other slits paired with the red filter 31.

Of the red light emitted from each pixel on the color image display section 13, if red light is emitted from a point within the range of the angle θ from the slit 32, for example, point P, this is the slit 32. And red filter 31
If the red light is emitted from the point Q through the slit 32 and the red filter 31, the light travels in the direction shown in FIG. The red light can be emitted in any direction within the range of the angle θ.

Further, at this time, even if green light or blue light is emitted from a point within the range of the angle θ from the slit 32 among arbitrary points of the color image display section 13, it corresponds to the slit 32. Since the red filter 31 blocks the passage of the green light and the blue light, the red filter 31 does not emit light having a color other than the red light.

Then, as shown in FIG. 5, the green light is within a range of the angle θ from the slit adjacent to the slit 32, that is, the slit 42 corresponding to the green filter 41, for example, the point Q or P. If the light is emitted from a point, it will pass through the slit 42 and the green filter 41 and travel in the direction shown.

Similarly, the blue light is emitted from the slit 3
If the light is emitted from a slit located adjacent to No. 2, that is, a slit corresponding to the blue filter, at a point within the range of the angle θ, the light passes through the slit and the blue filter and is emitted to the front surface.

As is clear from the above description, in this embodiment, even if red, green, and blue lights are simultaneously emitted at arbitrary points of the color image display section 13, these respective light emitting points have the angle θ. It is possible to select this with a color filter of the same color as the color of the generated light and a slit that is paired with this color filter, and to emit in the direction corresponding to the light emitting point. The right-eye image of each color is displayed on the color image display unit 13 on the straight line connecting the right eye and each color filter, and the color image display unit 13 on the extension of the straight line connecting the left eye of the viewer and each color filter.
By displaying the left-eye image of each color on, the viewer can see the color stereoscopic image.

As described above, in this embodiment, the right eye image of each color is displayed on the color image display unit 13 on the extension of the straight line connecting the right eye of the viewer and each color filter to the left eye of the viewer. By displaying the left-eye image of each color on the color image display unit 13 which is on the extension of the straight line connecting the color filter with each color filter, the viewer can see the color stereoscopic image, and the slit 21 can select the wavelength. Since the slits 21 are made to pass through different slits 21 for each wavelength, the area through which light passes is 3 times larger than that of conventional ones without using a special and expensive electronic element or mechanical mechanism.
It can be increased by a factor of two to avoid the presence of extremely strong light in the black portion, and a natural color stereoscopic image that is not rough can be displayed.

FIG. 6 is a block diagram showing another embodiment of the color stereoscopic image display device according to the present invention.

The color stereoscopic image display device shown in FIG.
A pinhole plate 51 having openings (pinholes) through which light passes at a predetermined interval in a light blocking portion, a color filter that passes only red light, a color filter that passes only green light, Color filters that pass only blue light are arranged in a nest, color filter plates 52 arranged on the front side of the pinhole plate 51, and the pins for generating light emitted from each pinhole. The color image display section 53 is provided on the back side of the hole plate 51.

In this case, the color image display unit 53 is a color display device capable of reproducing natural colors by using the three primary colors of red, green and blue, such as a normal color television device or a plasma display device. , Red, green, blue color display at different positions,
Or, such as a screen illuminated by a three-tube video projector, it is composed of a color display device that emits red, green, and blue colors at the same position. Displayed in a shape.

Further, the pinhole plate 51 is a shield portion 6 constituted by a plate-like member which shields light as shown in FIG.
2 and a plurality of pinholes 61 formed at the apex of an equilateral triangle when the plate member is filled with the equilateral triangle, and the red and green colors displayed on the color image display section 53 are provided. , Blue light is made to pass through the corresponding pinhole 61 for each color and is made incident on the color filter plate 52.

As shown in FIG. 8, the color filter plate 52 allows the red filter 63 and the green light to pass only the red light so that the different color lights can pass from the adjacent pinholes 61 of the pinhole plate 51. Green filters 64, 65, 66 that pass only blue light and blue filters 67, 68, 69 that pass only blue light are arranged in RGB delta, and these red filters 63, green filters 64, 6 are arranged.
5, 66, blue filters 67, 68, 69 select wavelengths of light emitted from each pinhole 61 formed in the pinhole plate 51, and only red light, only green light, and blue light are selected. Only the light passes through and is emitted to the front.

Next, a partially enlarged view shown in FIG. 9 and FIG.
The stereoscopic image display principle of this embodiment will be described with reference to the schematic diagram shown in FIG. In the following description, in order to make the description easier to understand, different numbers are given to the pinholes 61, the red filters 63, the green filters 64, 65, 66, and the blue filters 67, 68, 69. There is.

First, of the pinholes 61 formed in the pinhole plate 51 as shown in FIG.
One of these pinholes 61 is selected, the pinhole 61 corresponding to the red filter 63 is referred to as a red pinhole 71, and three green filters 64 and 65 arranged with the red pinhole 71 as the center. , 66 corresponding to green pinholes 72, 7 respectively.
Three blue filters 67, 68, which are referred to as 3, 74 and are arranged with the red pinhole 71 as a center.
The pinholes 61 corresponding to 69 are referred to as green pinholes 75, 76 and 77, respectively.

Next, as shown in FIG. 10, the pinhole plate 51.
The perpendicular foot (that is, the center line) dropped from the red pinhole 71 to the color image display portion 53 is 81,
Vertical feet (that is, centerlines) drawn from the green pinholes 72, 73, 74 onto the color image display portion 53 are designated as 82, 83, 84, and the blue pinholes 75, 7 are defined.
If the feet (that is, the center line) of the perpendiculars drawn from 6 and 77 onto the color image display portion 53 are 85, 86 and 87,
For the same reason as in the above embodiment, the red pinhole 7
1 is a regular hexagon centered on the center line 81 of the red light passing through the red pinhole 71 on the color image display section 53, that is, the range that does not overlap with the range expected from the other red pinhole 71 closest to 1. Point (for example, R point) within the range (red light emitting area 81a for red pinhole)
When the red light is emitted from the red light, the red light passes through the red pinhole 71 and is emitted in the direction corresponding to the light emitting point on the color image display portion 53 on the front surface. It enters the human right or left eye.

Further, at this time, green light and blue light are emitted from a point within a range (a red light emitting area 81a for red pinhole) which is a regular hexagon centered on the center line 81 on the color image display section 53. However, since the red pinhole 71 blocks the passage of the green light and the blue light, light having a color other than the red light is not emitted from the red pinhole 71.

Then, the green light includes a point (light emitting point) of the green pinholes 72, 73 and 74 adjacent to the red pinhole 71, which emits the green light, as shown in FIG. A green pinhole having a range, for example, if the light emitting point is the R point, this green light passes through the green pinhole 73 corresponding to the range including the R point (green light emitting area 83a for the green pinhole). , Is emitted in the direction corresponding to the point R on the color image display portion 53 on the front surface, and is incident on the right eye or the left eye of a person who is watching this.

Similarly, as shown in FIG. 10, among the blue pinholes 75, 76, 77 adjacent to the red pinhole 71, the point at which the blue light emits the blue light (light emitting point). If a blue pinhole having a range including the light emitting point is the R point, the blue light passes through the blue pinhole 77 corresponding to the range including the R point (blue light emitting area 87a for the blue pinhole). Then, the light is emitted in the direction corresponding to the point R on the color image display portion 53 on the front surface, and is incident on the right eye or the left eye of the person who is looking at it.

As is apparent from the above description, in this embodiment, even if red, green, and blue lights are simultaneously emitted at arbitrary points of the color image display section 53, the range including each of these light emitting points is included. Since it can be selected by the pinhole 61 and each color filter that are in charge of the light and emitted in the direction corresponding to the light emitting point, the color image display unit on the extension of the straight line connecting the right eye of the viewer and each color filter. By displaying the right-eye image of each color on 53 and displaying the left-eye image of each color on the color image display section 53 on the extension of the straight line connecting the left eye of the viewer and each color filter, You can show color stereoscopic images.

As described above, in this embodiment, the right eye image of each color is displayed on the color image display section 53 on the extension of the straight line connecting the right eye of the viewer and each color filter to the left eye of the viewer. By displaying the left-eye image of each color on the color image display section 53 on the extension of the straight line connecting the color filter with each color filter, it is possible to show the viewer a color stereoscopic image, Since the pinholes 61 are wavelength-selective and pass through different pinholes 61 for each wavelength, the area through which light passes can be made smaller than that of conventional ones without using a special and expensive electronic element or mechanical mechanism. It can be increased by about three times to avoid the presence of an extremely strong light intensity in the black portion, and a natural color stereoscopic image without roughness can be displayed.

Further, in this embodiment, the respective pinholes 61 allow the emission angles of red light, green light, and blue light to be controlled not only in the horizontal direction but also in the vertical direction. Since I try to make the directions three-dimensional,
It is possible to show color stereoscopic images not only to the sitting person but also to the lying person.

In each of the above-described embodiments, the color image display units 13 and 53 are screens illuminated by a color television device, a plasma display device, a three-tube video projector, or the like, which emits red, green, and blue. For example, a color display that emits red, green, and blue colors at the same position is used, but white light incident from the back is taken in and the intensity of this light is adjusted. Selectively pass red,
A color liquid crystal display device that emits green or blue light may be used.

Further, in each of the above-mentioned embodiments, the slit 21 or the pinhole 61 of the opening type is used, but the slit or the pinhole of the transparent type may be used.

[0051]

As described above, according to the present invention, in claims 1 to 6, the apertures or transparent portions (pinholes or slits) are provided with wavelength selectivity, and different apertures or transparent portions are provided for each wavelength. By passing through a part (pinhole or slit), the area through which light passes can be increased without using a special and expensive electronic element or mechanical mechanism.
By avoiding the presence of extremely strong light in the black area, you can show a natural color stereoscopic image that is not rough.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a color stereoscopic image display device according to the present invention.

FIG. 2 is a partially enlarged view showing a detailed configuration example of the slit plate shown in FIG.

FIG. 3 is a partially enlarged view showing a detailed configuration example of the color filter plate shown in FIG.

FIG. 4 is a view showing the color stereoscopic image display device shown in FIG.
It is a schematic diagram for demonstrating the behavior of red light.

FIG. 5 is a view showing the color stereoscopic image display device shown in FIG.
It is a schematic diagram for demonstrating the behavior of green light.

FIG. 6 is a configuration diagram showing another embodiment of a color stereoscopic image display device according to the present invention.

7 is a partially enlarged view showing a detailed configuration example of the pinhole plate shown in FIG.

8 is a partially enlarged view showing a detailed configuration example of the color filter plate shown in FIG.

9 is a partially enlarged view showing a detailed configuration example when the pinhole plate and the color filter shown in FIG. 6 are reversely overlapped.

10 is a schematic diagram for explaining the behavior of red light, green light, and green light in the color stereoscopic image display device shown in FIG.

[Explanation of symbols]

11 Slit Plate (Optical Path Control Plate) 12 Color Filter Plate 13 Color Image Display Part 21 Slit (Small Non-Circular Opening or Transparent Part) 22 Shielding Part 23 Red Filter (Color Filter) 24 Green Filter (Color Filter) 25 Blue Filter ( 31 red filter 32 center red filter 33 left red filter 34 right red filter 41 green filter 42 green slit 51 pinhole plate (optical path control plate) 52 color filter plate 53 color image display section 61 pinhole (circular shape) Small aperture or transparent part) 62 light shielding part 63 red filter (color filter) 64 first green filter (color filter) 65 second green filter (color filter) 66 third green filter (color filter) 67 1 blue filter (color filter) 68 2nd Blue filter (color filter) 69 third blue filter (color filter) 71 red pinhole 72 first green pinhole 73 second green pinhole 74 third green pinhole 75 first blue pinhole 76 Second blue pinhole 77 Third blue pinhole 81 Center line of red pinhole 71 82 Center line of first green pinhole 72 83 Center line of second green pinhole 73 84 Third green pinhole 74 center line 85 center line of the first blue pinhole 75 86 center line of the second blue pinhole 76 87 center line of the third blue pinhole 77 81a Generates red light corresponding to the red pinhole 71. Region 83a Generates green light corresponding to the second green pinhole 73 Region 87a Generates blue light corresponding to the third blue pinhole 77 Pass

Claims (6)

[Claims] 1. An optical path control plate having a large number of circular or non-circular small openings or transparent portions formed in a light-shielding surface, and a color image is displayed on the back surface of the optical path control plate. In a color stereoscopic image display device having a color image display unit, on a light path that passes through the opening or the transparent portion of the optical path control plate, a color filter that allows only light of a specific wavelength to pass is disposed, and the opening or the transparent portion A color stereoscopic image display device, characterized in that light of a color corresponding to a specific wavelength is emitted from each of the lights emitted from the color image display unit. 2. The color stereoscopic image display device according to claim 1, wherein the light path control plate is a slit plate in which a narrow width vertical stripe-shaped opening or a transparent portion is arranged in a light shielding surface. A color stereoscopic image display device characterized by the above. 3. The color stereoscopic image display device according to claim 1, wherein the light path control plate is a pinhole plate in which an opening having a small diameter or a transparent portion is arranged in a light shielding surface. A color stereoscopic image display device characterized by. 4. The color stereoscopic image display device according to claim 1, wherein a display device which emits red, green, and blue light by itself is used as the color image display unit. Color stereoscopic image display device. 5. The color stereoscopic image display device according to claim 1, wherein the color image display unit adjusts the intensity of light incident from the back surface to produce red, green, or blue light. A color stereoscopic image display device using a display device that emits light. 6. The color stereoscopic image display device according to claim 1, wherein the color image display unit is a projector,
A color stereoscopic image display device using a display device for displaying red, green and blue images on a rear projection screen.