JP6924586B2 - Stereoscopic image display device - Google Patents

Description

The present invention relates to a stereoscopic image display device that displays a stereoscopic image while suppressing color moiré.

Integral stereoscopic image display technology is known as a technology for enabling stereoscopic image display by using an electronic device for integral photography (IP), which is a stereoscopic photography technology invented by Lipman. ing.

As shown in FIG. 12, in the integral stereoscopic image display device 100, in order to display an integral stereoscopic image, a large number of high-definition display units (displays) 101 and element lenses 102a are arranged two-dimensionally. It is composed of a lens array 102.
Then, the stereoscopic image display device 100 displays on the display unit 101 as an image group (element image group) in which a large number of small images (element image E) are two-dimensionally arranged at positions corresponding to the element lens 102a. As a result, the observer M can visually recognize the stereoscopic image T by observing the element image group through the lens array 102.
The stereoscopic image display device 100 realizes color display by forming pixels into a sub-pixel (sub-pixel) structure and making each sub-pixel correspond to, for example, three colors of RGB (red, green, and blue).

However, in the direct-view type display unit 101, since the display surface having the pixel structure of the sub-pixels is resampled by the lens arrangement of the lens array 102, a new periodic component is generated due to mutual periodicity, and the solid is reproduced. There is a problem that color moire occurs in the image T.
In order to solve this problem, a method of reducing color moire by arranging an optical diffuser on the display surface of the display unit 101 and superimposing each color of RGB is disclosed (Patent Document 1, Non-Patent Document 1). reference).

JP-A-2002-228974

Kobayashi, Okui, Arai, Okano, "Color Moire Reduction Method for Integral Stereoscopic Television", Journal of the Institute of Image Information and Television Engineers, Vol.59, No.3, pp.439-447 (2005)

The conventional method using an optical diffuser to reduce color moiré mixes each color of RGB, so that the resolution of the stereoscopic image, especially the resolution of the stereoscopic image reproduced at a position far from the display surface in the depth direction, deteriorates. There is a problem that it ends up.
Therefore, it is an object of the present invention to provide a stereoscopic image display device capable of displaying a stereoscopic image by reducing color moire without deteriorating the resolution.

In order to solve the above problems, the stereoscopic image display device according to the present invention is a stereoscopic image display device that displays a color stereoscopic image by an integral stereoscopic method, and includes a plurality of element image display units and a lens array. A sub-pixel structure that includes an integral stereoscopic display unit and an optical compositing unit so that at least two colors are mixed in each element image display unit so that the stereoscopic image synthesized by the optical compositing unit is mixed at an arbitrary viewpoint position. Placed the color of.

In such a configuration, in the stereoscopic image display device, each integral stereoscopic display unit displays an integral stereoscopic color element image on the display surface in a two-dimensional array by the element image display unit. Then, the stereoscopic image display device can make the observer visually recognize the stereoscopic image by the lens array in which the element lenses associated with the element images are two-dimensionally arranged on the display surface side of the element image display unit.
In addition, the stereoscopic image display device optically synthesizes a stereoscopic image reproduced by a plurality of integral stereoscopic display units by the optical compositing unit. For example, the stereoscopic image display device synthesizes a stereoscopic image by aligning the optical paths of a plurality of integral stereoscopic display units in one direction by a half mirror as an optical compositing unit.

Here, each of the plurality of element image display units has a pixel structure in which the colors of the sub-pixels are arranged so that at least two colors are mixed in the stereoscopic image synthesized by the optical compositing unit at an arbitrary viewpoint position. Therefore, in the stereoscopic image display device, even if the pixels of the sub-pixel structure are sampled by the element lens, the observer emits the color light in which a plurality of colors are mixed in the sub-pixel unit, so that the observer can perform the color periodicity in the sub-pixel unit. It becomes difficult to see. As a result, the stereoscopic image display device can reduce color moiré.
Further, the stereoscopic image display device can emit a plurality of colors in units of sub-pixels. Therefore, in the stereoscopic image display device, the color intensities are not averaged in the pixels as in the case where a plurality of colors are mixed by the optical diffuser in the entire pixels, and the colors are colored in sub-pixel units. Since the intensity of each is maintained, it is possible to suppress a decrease in the resolution of the reproduced stereoscopic image.

Further, in order to solve the above problems, the stereoscopic image display device according to the present invention is a stereoscopic image display device that displays a stereoscopic image of three primary colors by an integral stereoscopic method, and includes an element image display unit and a lens array. A pixel that includes three integral stereoscopic display units and an optical compositing unit, and for each element image display unit, the stereoscopic image synthesized by the optical compositing unit is a mixture of three primary colors at an arbitrary viewpoint position. The colors of the sub-pixels of the structure are arranged.

In such a configuration, the stereoscopic image display device displays an integral stereoscopic color element image in a two-dimensional array on the display surface of the element image display unit by each integral stereoscopic display unit, and associates the element image with the element image. The stereoscopic image can be visually recognized by the observer through the lens array in which the element lenses are two-dimensionally arranged on the display surface side of the element image display unit.
In addition, the stereoscopic image display device optically synthesizes the stereoscopic image reproduced by the three integral stereoscopic display units by the optical compositing unit.

Here, for each element image display unit of the three integral stereoscopic display units, a pixel structure in which the colors of the sub-pixels are arranged so that the stereoscopic image synthesized by the optical compositing unit mixes the three primary colors at an arbitrary viewpoint position. It has become. Therefore, in the stereoscopic image display device, even if the pixels of the sub-pixel structure are sampled by the element lens, the observer can obtain the color periodicity of the sub-pixel unit by emitting the color light in which the three primary colors are mixed in the sub-pixel unit. It becomes difficult to see. As a result, the stereoscopic image display device can reduce color moiré.
In addition, the stereoscopic image display device can emit three primary colors with sub-pixels. Therefore, in the stereoscopic image display device, the color intensities are not averaged in the pixels as in the case where a plurality of colors are mixed by the optical diffuser in the entire pixels, and the colors are colored in sub-pixel units. Since the intensity of each is maintained, it is possible to suppress a decrease in the resolution of the reproduced stereoscopic image.

Further, in order to solve the above problems, the stereoscopic image display device according to the present invention is a stereoscopic image display device that displays a stereoscopic image of three primary colors by an integral stereoscopic method, and includes an element image display unit and a lens array. The element image display unit and the lens array of one integral stereoscopic display unit are provided with two integral stereoscopic display units including , The sub-pixels are arranged with a shift of 1/2, and the pixel structure is such that the stereoscopic image synthesized by the optical composition unit is mixed in two of the three primary colors at an arbitrary viewpoint position for each element image display unit. The colors of the sub pixels are arranged.

In such a configuration, the stereoscopic image display device displays an integral stereoscopic color element image in a two-dimensional array on the display surface of the element image display unit by each integral stereoscopic display unit, and associates the element image with the element image. The stereoscopic image can be visually recognized by the observer through the lens array in which the element lenses are two-dimensionally arranged on the display surface side of the element image display unit.
In addition, the stereoscopic image display device optically synthesizes the stereoscopic image reproduced by the two integral stereoscopic display units by the optical compositing unit.

Here, by arranging one of the element image display units and the lens array so as to be offset by 1/2 of the sub pixels in the arrangement direction of the sub pixels of the element image display unit, the solid that is synthesized by the optical compositing unit. The image will be a mixture of the two primary colors at any viewpoint position.
Therefore, even if the pixels of the sub-pixel structure are sampled by the element lens, the color light in which the two primary colors are mixed is emitted in the sub-pixel unit, which makes it difficult for the observer to visually recognize the color periodicity in the sub-pixel unit. As a result, the stereoscopic image display device can prevent color moire.
Further, the stereoscopic image display device can emit two primary colors out of the three primary colors in units of sub-pixels. Therefore, in the stereoscopic image display device, the color intensities are not averaged in the pixels as in the case where a plurality of colors are mixed by the optical diffuser in the entire pixels, and the colors are colored in sub-pixel units. Since the intensity of each is maintained, it is possible to suppress a decrease in the resolution of the reproduced stereoscopic image.

The present invention has the following excellent effects.
According to the present invention, when a stereoscopic image is visually recognized by an observer, light in which at least two colors are mixed can be visually recognized by the observer.
Thereby, according to the present invention, even if the pixels of the sub-pixel structure are sampled by the element lens, the periodic component can be suppressed and the color moire can be reduced.
Further, according to the present invention, since a plurality of colors are expressed at the same sub-pixel position, a plurality of colors can be mixed and emitted in units of sub-pixels.
Thereby, the present invention can prevent deterioration of the resolution as compared with the conventional method of mixing all the colors of the sub-pixels in the pixel.

It is a block diagram which shows the structure of the stereoscopic image display device which concerns on 1st Embodiment of this invention. It is a figure which shows the arrangement of element lenses of a lens array, (a) is a figure which shows a square lattice arrangement, (b) is a figure which shows the delta (bale) arrangement. It is a figure which shows an example of the pixel structure, (a), (b), (c) is the figure which shows the pixel structure of the element image display part different from each other. It is a figure which shows another example of a pixel structure, (a), (b), (c) are the figure which shows the pixel structure of the element image display part which are different from each other. It is a block diagram which shows the structure of the stereoscopic image display device which concerns on 1st Embodiment of this invention by embodying a pixel structure. It is a block diagram which shows the structure of the stereoscopic image display device which concerns on 2nd Embodiment of this invention by embodying a pixel structure. It is a figure for demonstrating the lens shift of the stereoscopic image display device which concerns on 2nd Embodiment of this invention, (a) is the figure which shows the example which arranges the lens array of a square lattice arrangement in shift, (b) is a figure which shows. It is a figure which shows the example of the shielding plate used for a lens array. It is a figure for demonstrating the lens shift of the stereoscopic image display device which concerns on 2nd Embodiment of this invention, and (a) is the figure which shows the example which arranges the lens array of the delta (bale) arrangement in shift, (a). b) is a diagram showing an example of a shielding plate used for a lens array. It is a block diagram which shows the structure of the stereoscopic image display device which concerns on 3rd Embodiment of this invention by embodying a pixel structure. It is a block diagram which shows the structure of the stereoscopic image display device which concerns on 4th Embodiment of this invention by embodying a pixel structure. It is a block diagram which shows the structure of the stereoscopic image display device which concerns on 5th Embodiment of this invention. It is a figure which shows the structure of the conventional integral stereoscopic image display device, (a) is a front view, (b) is a side view.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
[Structure of stereoscopic image display device]
First, the configuration of the stereoscopic image display device 1 according to the first embodiment will be described with reference to FIG. Note that FIG. 1 is a plan view of the stereoscopic image display device 1 as viewed from above.

The stereoscopic image display device 1 displays a color stereoscopic image by the IP method. The stereoscopic image display device 1 is provided with three integral stereoscopic display unit ₁₀ (10 _1, 10 2, 10 _3), a cross half mirror 20 serving as a compositing unit.

The integral stereoscopic display unit 10 displays an element image group on one display surface to display a stereoscopic image. The integral stereoscopic display unit 10 includes an element image display unit 11 and a lens array 12.

The element image display unit 11 displays an element image group in which color element images E are two-dimensionally arranged. The element image display unit 11 is a direct-view type display such as a liquid crystal display or an EL display, and has a color pixel structure.
Here, the element image group displayed by the integral stereoscopic display unit 10 ₁ and the element image group displayed by the integral stereoscopic display unit 10 ₂ are images that are surface objects with respect to the surface of _{the half mirror 21 1} , which will be described later. .. Further, the elemental image group integral stereoscopic display unit 10 ₂ and the element image group is displayed integral stereoscopic display unit 10 ₃ displays an image of the surface subject to the surface of the half mirror 21 ₂ to be described later.
Note that these element image groups may be, for example, an image of the same subject taken by a stereoscopic imaging device as disclosed in Japanese Patent Application Laid-Open No. 11-98532 by dividing light, or CG. It may be generated by the above.

Further, each of the pixel structure of the elemental image display unit _{11 1,} 11 2, 11 ₃ is a display having a sub-pixel structure of three primary colors (RGB). The elemental image display unit _{11 1,} 11 2, 11 _3, in each of the optical path, differently emission color of the sub-pixels in the same position in a pixel are all elemental image display unit _{11 1,} 11 2, 11 ₃ The colors of the sub-pixels are arranged differently for each. Note that the sub-pixel structure of the elemental image display unit _{11 1,} 11 2, 11 _3, will be described in detail later.

Lens array 12 is composed of a plurality of element lenses 12a arranged two-dimensionally, it is intended for forming the element images displayed on the elemental image display unit 11 as a stereoscopic image. The distance between the lens array 12 and the display surface of the element image display unit 11 is the focal length of the element lens 12a. Further, the configuration (lens size and arrangement) of the lens array 12 of the integral stereoscopic display units 10 ₁ , 10 ₂ and 10 _{3 is the same.}
For example, in the lens array 12, individual element lenses 12a may be configured in a square lattice array (12R) as shown in FIG. 2 (a), or individual element lenses 12a may be configured as shown in FIG. 2 (b). May consist of a delta array (12D) .
By arranging the integral stereoscopic display units 10 ₁ , 10 ₂ , 10 ₃ in a U shape with the display surface inside, the optical paths are aligned in the same direction by the cross-half mirror 20.

The cross-half mirror (optical compositing unit) 20 _{aligns the light output by the integral stereoscopic display unit 10 (10 1} , 10 ₂ , 10 ₃ ) in the same direction, and optically synthesizes a stereoscopic image. The cross half mirror 20 is _{configured so that the two half mirrors 21 1} and 212 are orthogonal to each other.

Half mirror 21 _1, 21 ₂ is to reflect the light incident on one surface and transmits light incident on the other surface. Here, the half mirror 21 ₁ is tilted 45 degrees with respect to the display surface of the integral stereoscopic display unit 10 _{1 and} the display surface of the integral stereoscopic display unit 10 _{2 , and the integral stereoscopic display unit 10 1} outputs the light. reflect light, integral three-dimensional display section 10 ₂ is transmitted through the output light. Further, the half mirror 21 _2, with respect to the display surface of the integral three-dimensional display section ₁₀₃ and the integral three-dimensional display section 10 ₂ of the display surface, the inclination of 45 degrees, respectively, are integral stereoscopic display unit 10 ₃ outputs light reflects, integral three-dimensional display section 10 ₂ is transmitted through the output light.

As described above, in the stereoscopic image display device 1, the stereoscopic image synthesized by the cross-half mirror 20 which is the optical compositing unit is 3 at an arbitrary viewpoint position for each element image display unit 11 of the three integral stereoscopic display units 10. The colors of the sub-pixels in the pixel structure are arranged so that the primary colors are mixed.

(Pixel structure)
Referring now to FIG. 3 (see FIG. 1 as appropriate), the elemental image display unit _{11 1,} 11 2, 11 for each of the pixel structure of ₃ will be described.
3 (a) is an example of a pixel structure of the elemental image display unit 11 ₁ to form a sequence of sub-pixel "RGB (red, green, and blue)" as the pixel _{P 1.}
3 (b) is an example of a pixel structure of the elemental image display section 11 ₂ constitute a sequence of sub-pixel "GRB" as a pixel _{P 2.} The elemental image display unit 11 _2, an inverted top and bottom of the elemental image display section ₁₁₁ having a RGB order of the pixel structure shown in FIG. 3 (a), the left end of the sub-pixel B, and the right end of the sub-pixel GR was used Instead, the sub-pixel GRB may form the _{pixel P 2.}

FIG. 3 (c), an example of a pixel structure of the elemental image display unit 11 _3, constitute a sequence of sub-pixel "GBR" as a pixel _{P 3.} The element image display unit 11 ₃ does not use the leftmost sub-pixel R and the right-most sub-pixel GB of the _{element image display unit 11 1} having a pixel structure in the RGB order shown in FIG. 3A, and the sub-pixels are not used. it may be configured to pixel _{P 3} in GBR.

Thereby, in the pixel _{P 1,} P 2, _{P 3} corresponding to the same pixel position as a surface target image, the arrangement of sub-pixels "RGB" pixel _{P 1} has a sequence of sub-pixel "BGR" by the half mirror 21 ₁ Become. Further, the arrangement of sub-pixels "GRB" of the pixel _{P 2,} since not reversed by the half mirror ₂₁ 1, 21 _2, remains arrangement of sub-pixels "GRB". Further, the arrangement of sub-pixels "GBR" pixel _{P 3} is a sequence of sub-pixel "RBG" by the half mirror 21 _2. That is, the pixels _{P 1,} P 2, _{P 3} corresponding to the same pixel position as a surface target image, in units of sub-pixels, the half mirror ₂₁ 1, 21 _2, all different color subpixels, reaches the viewer M The light to be emitted is a mixture of three colors.

Strictly speaking, _{the light emitted by the pixels P 1} , P ₂ , and P ₃ is inverted by the element lens 12a, but since the inversion operation is common to all pixels P, three colors are mixed in sub-pixel units. The color is still visible to the observer.

Here, using the elemental image display unit having a pixel structure of RBG order, although RGB in sub-pixel units is configured to output a mixed light, the elemental image display unit 11 _1, 11 _2, 11 ₃ of the pixel structure May have a unique pixel structure, as shown in FIG. In FIG. 4 (a), constitute a sequence of sub-pixel "RGB" as a pixel _{P 1.} In FIG. 4 (b), constitute a sequence of sub-pixel "GRB" as a pixel _{P 2.} In FIG. 4 (c), to constitute a sequence of sub-pixel "GBR" as a pixel _{P 3.}
Of course, the pixel structure of the elemental image display unit 11 _1, 11 _2, 11 _3, if a sequence in which the light of the sub-pixels are mixed all as output light, limited to the example shown in FIG. 3, FIG. 4 No.

[Operation of stereoscopic image display device]
Next, the operation of the stereoscopic image display device 1 will be described with reference to FIG. Here, the optical path of a certain sub-pixel will be specifically described.

It is assumed that the observer visually recognizes the R light of the sub-pixel as a pixel in the integral stereoscopic display unit 10 ₁ through the element lens 12a _1. R light of the sub-pixels via the element lenses 12a _1, is reflected by the half mirror 21 ₁ is transmitted through the half mirror 21 _2, in which was recognized in the viewer.

On the other hand, the observer, in integral stereoscopic display unit 10 _2, the through element lenses 12a ₂ corresponding to the element lenses 12a _1, views the pixels of the same pixel position as an element image of the integral three-dimensional display section 10 ₁ become. At this time, since the pixel structure is different even at the positions of the same sub-pixels of the same pixel, the observer visually recognizes the B light as the sub-pixel. B light of the sub-pixels via the element lenses 12a _2, is transmitted through the half mirror ₂₁ 1, 21 _2, those that are visible to the observer.

Moreover, the viewer, in integral stereoscopic display unit 10 _3, that through the element lenses 12a ₃ corresponding to element lenses 12a _1, views the pixels of the same pixel position as an element image of the integral three-dimensional display section 10 ₁ become. At this time, since the pixel structure is different even at the positions of the same sub-pixels of the same pixel, the observer visually recognizes the G light as the sub-pixel. G light of the sub-pixels via the element lenses 12a _3, transmitted through the half mirror 21 _1, is reflected by the half mirror 21 _2, in which was recognized in the viewer.
As a result, the stereoscopic image display device 1 can emit colored light in which all of RGB are mixed in units of sub-pixels.

Here, the light is viewed as a pixel of integral three-dimensional display section 10 ₁ and the R light. However, at a certain viewpoint position, when the observer views the G light as a pixel of integral three-dimensional display unit 10 _1, the integral three-dimensional display section 10 _2, 10 _3, the observer for each sub-pixel each R light B light will be visually recognized. Further, in a certain viewpoint position, when the observer views the B light as a pixel of integral three-dimensional display unit 10 _1, the integral three-dimensional display section 10 _2, 10 _3, the observer for each sub-pixel, respectively and G light The R light will be visually recognized.

As described above, in the stereoscopic image display device 1, even if the element image has the same pixel position _{, the colors of the integral stereoscopic display units 10 1} , 10 ₂ , and 10 ₃ are different for each sub-pixel unit. At the position, the observer can visually recognize the light in which the three colors of RGB are mixed.
As a result, the stereoscopic image display device 1 can display a stereoscopic image without color moiré. Further, since the stereoscopic image display device 1 emits three colors in units of sub-pixels, it is possible to suppress a decrease in resolution as compared with a conventional method of mixing a plurality of colors in the entire pixel.

<Second Embodiment>
[Structure of stereoscopic image display device]
Next, the configuration of the stereoscopic image display device 1B according to the second embodiment will be described with reference to FIG. Note that FIG. 6 is a plan view of the stereoscopic image display device 1B as viewed from above.

The stereoscopic image display device 1B displays a color stereoscopic image by the IP method. The basic configuration of the stereoscopic image display device 1B is the same as that of the stereoscopic image display device 1 described with reference to FIG. However, the stereoscopic image display apparatus 1B (here, 10 ₁₎ any one integral three-dimensional display section 10 _(here, 10 2, 10 ₃₎ Other integral stereoscopic display unit 10 lens relative The array 12 is arranged so as to be relatively offset by a predetermined distance in the in-plane direction.

Specifically, stereoscopic image display apparatus 1B, when the lens array 12 is square lattice array (see FIG. 2 (a)), when the viewer M is directly facing the integral three-dimensional display section 10 _2, Fig. 7 ( as shown in a), through a cross half mirror 20, the position of the lens array 12 _1, with respect to the other lens array ₁₂ 2, 12 _3, the horizontal by half the lens pitch a of element lenses 12a and Arrange so that they are displaced in the vertical direction.
In this case, the element image to be displayed on the integral stereoscopic display unit 10 _{1 is} to display the element image at the viewpoint position shifted according to the deviation of the element lens 12a on the _{integral stereoscopic display units 10 2} and 10 _3. And.

That is, in the stereoscopic image display device 1B, for each element image display unit 11 of the two integral stereoscopic display units 10, the stereoscopic image synthesized by the cross-half mirror 20 which is an optical compositing unit has three primary colors at an arbitrary viewpoint position. The colors of the sub-pixels in the pixel structure are arranged so that the two colors are mixed.

At this time, since the light output from the lens array 12 _1, and the light output from the other lens array 12 _2, 12 ₃ are mixed in the vicinity of the element images, depending on the size of the stereoscopic image to be reproduced, FIG It is preferable that the shielding plate S as shown in 7 (b) is provided on the front surface or the back surface of the lens array 12. The shielding plate S shields light other than a predetermined range including the central portion of the element lens 12a, and has an opening H at the central portion. This aperture H corresponds to the position of the element lens 12a and has a rhombus whose diagonal size is equal to the size of the element lens 12a.

Incidentally, the stereoscopic image display apparatus 1B, if the lens array 12 is delta arrangement (see FIG. 2 (b)), when the viewer M is directly facing the integral three-dimensional display section 10 _2, FIG. 8 (a) as shown, via a cross half mirror 20, and the position of the lens array 12 _1, and the position of the lens array 12 _3, the lens array 12 _2, ± 1 / √3 of the lens distance a element lenses 12a It suffices to arrange them so that they are displaced in the vertical direction.

Further, in this case, it is preferable that the shielding plate S as shown in FIG. 8B is provided on the front surface or the back surface of the lens array 12. The opening H of the shielding plate S may be a regular hexagon corresponding to the position of the element lens 12a and having the length of each side being half the size of the element lens 12a.

[Operation of stereoscopic image display device]
Next, the operation of the stereoscopic image display device 1B will be described with reference to FIG. Here, the lens array 12 is a square lattice array, but the action is the same even if it is a delta array.

In integral stereoscopic display unit 10 _2, via the element lenses 12a _2, as the pixel, the observer B light of the sub-pixels is visible. B light of the sub-pixels via the element lenses 12a _2, is transmitted through the half mirror ₂₁ 1, 21 _2, those that are visible to the observer.

On the other hand, the observer, in integral stereoscopic display unit _103, via the element lenses 12a ₃ corresponding to element lenses 12a _2, will view the same pixel as an element image of the integral three-dimensional display section 10 _2. At this time, since the pixel structure is different even at the positions of the same sub-pixels of the same pixel, the observer visually recognizes the G light as the sub-pixel. G light of the sub-pixels via the element lenses 12a _3, transmitted through the half mirror 21 _1, is reflected by the half mirror 21 _2, in which was recognized in the viewer.

Furthermore, the observer visible in integral stereoscopic display unit 10 _1, via the element lenses 12a ₁ shifted 1/2 only the position of the lens spacing from the element lenses 12a _2, the pixels of the integral three-dimensional display section 10 ₁ do. In this case, the color arrangement of the pixel structure of integral three-dimensional display unit 10 ₁ is different from that of the other integral stereoscopic display unit 10 _1, 10 _3, the viewer, as a sub-pixel, views the R light .. R light of the sub-pixels via the element lenses 12a _1, reflected by the half mirror 21 ₁ is transmitted through the half mirror 21 _2, in which was recognized in the viewer.
As a result, the stereoscopic image display device 1B can emit colored light in which all of RGB are mixed in units of sub-pixels.

Here, although the light that is visually recognized as a pixel is integral stereoscopic display unit 10 ₂ and the B light, in the observer's viewpoint position, even when viewing the R light and G light, integral three-dimensional display unit In 10 ₁ and 10 ₃ , different colored lights are visually recognized for each sub-pixel, so that the observer can visually recognize a color in which all of RGB are mixed.

Thus, the stereoscopic image display device 1B is the integral three-dimensional display unit _{10 1,} 10 2, 10 _3, since the different colors in the sub-pixel, respectively, at any viewpoint position, the observer, RGB three colors It is possible to visually recognize the mixed light of.
As a result, the stereoscopic image display device 1B can display a stereoscopic image without color moire. Further, the stereoscopic image display device 1B, the lens array 12 ₁ integral stereoscopic display unit 10 _1, by shifting with respect to integral stereoscopic display unit ₁₀ 2, 10 _3, without changing the size of the element lenses 12a , A high-resolution stereoscopic image can be displayed.
In order to further improve the resolution, a half mirror (not shown) and an integral stereoscopic display unit (not shown) are further arranged on the output side of the stereoscopic image display device 1B to shift the lens array 12. May display different element images.

Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment. For example, here, the stereoscopic image display devices 1 and 1B are configured to include three integral stereoscopic display units 10. However, the integral stereoscopic display unit 10 may have two simple configurations. Hereinafter, a stereoscopic image display device having two integral stereoscopic display units 10 will be described.

<Third Embodiment>
[Structure of stereoscopic image display device]
The stereoscopic image display devices 1 and 1B of the first and second embodiments are configured to include three integral stereoscopic display units 10, and each pixel structure is configured to have a different color for each sub-pixel. Prevented color moiré. However, even if the integral stereoscopic display unit 10 has two simple configurations, color moiré can be easily suppressed. Hereinafter, a stereoscopic image display device having two integral stereoscopic display units 10 will be described.
First, the configuration of the stereoscopic image display device 1C according to the third embodiment will be described with reference to FIG. Note that FIG. 9 is a plan view of the stereoscopic image display device 1C as viewed from above.

The stereoscopic image display device 1C displays a color stereoscopic image by the IP method. The stereoscopic image display device 1C is provided with two integral three-dimensional display section _10B 1, 10 _2, a half mirror 21 as an optical combining portion. The integral stereoscopic display unit 10 ₂ is the same as the stereoscopic image display device 1 of the first embodiment.

The integral stereoscopic display unit 10B ₁ displays an element image group on one display surface to display a stereoscopic image. The integral stereoscopic display unit 10B ₁ includes an element image display unit 11 ₁ and a lens array 12 ₁ . The element image display unit 11 ₁ and the lens array 12 ₁ are the same as the stereoscopic image display device 1 of the first embodiment, respectively. However, the integral stereoscopic display unit 10B ₁ arranges the lens array 12 ₁ at a predetermined distance with respect to the RGB arrangement direction of the pixel structure in the element image display unit 11 _1.

Specifically, the stereoscopic image display device 1C arranges the lens array 12 _{1 in the integral stereoscopic display unit 10B 1} so as to be offset by 1/2 of the sub-pixel spacing b with respect to the RGB arrangement direction.

A half mirror (compositing unit) 21, an optical path integral three-dimensional display section 10B _1, 10 ₂ outputs aligned in the same direction, is to synthesize a stereoscopic image optically.
The half mirror 21 reflects light incident on one surface and transmits light incident on the other surface. Here, the half mirror 21 is tilted 45 degrees with respect to the display surface _{of the integral stereoscopic display unit 10B 1 and} the display surface of the integral stereoscopic display unit 10 ₂ , respectively, and the light output by _{the integral stereoscopic display unit 10B 1 is provided.} reflects, integral three-dimensional display section 10 ₂ is transmitted through the output light.

[Operation of stereoscopic image display device]
Next, the operation of the stereoscopic image display device 1C will be described with reference to FIG.
It is assumed that the observer visually recognizes the R light of the sub-pixel as a pixel in the integral stereoscopic display unit 10B ₁ via the element lens 12a _1. The R light of the sub-pixel is reflected by the half mirror 21 through the _{element lens 12a 1 and visually recognized by the observer.}

On the other hand, the observer, in integral stereoscopic display unit 10 _2, via the element lenses 12a ₂ corresponding to the element lenses 12a _1, thereby viewing the same pixel of the integral three-dimensional display section 10B ₁ and the element image. At this time, even if the positions of the same sub-pixels of the same pixel are different, the pixel structure is different, and further, the sub-pixels are shifted by 1/2. Therefore, the observer can use either B light or G light as the sub-pixels. Visually check. The B light or G light of the sub-pixels is transmitted through the half mirror 21 through the _{element lens 12a 2 and visually recognized by the observer.}

Thus, the stereoscopic image display device 1C can be the same pixel position of the element image, with integral three-dimensional display section 10B _1, 10 _2, because the color is different in the sub pixel units respectively, at any viewpoint position, The observer can visually recognize the light in which two colors of RGB are mixed.
As a result, the stereoscopic image display device 1C can display a stereoscopic image by reducing color moire generated by sampling a single color. Further, since the stereoscopic image display device 1C emits two colors in units of sub-pixels, it is possible to suppress a decrease in resolution as compared with a conventional method of mixing a plurality of colors in the entire pixel.

Further, in the stereoscopic image display device 1C, as described in the stereoscopic image display device 1B of the second embodiment, the integral stereoscopic display units 10 are separated from each other by a relatively predetermined distance in the in-plane direction of the lens array 12. Higher resolution may be performed as a configuration of the shifted stereoscopic image display device 1D (fourth embodiment; see FIG. 10). In this case, in the stereoscopic image display device 1D, if the element lenses are arranged in a square lattice, the integral stereoscopic display unit 10 ₁ and the integral stereoscopic display unit 10 ₂ are vertically and horizontally spaced apart from each other. The arrangement may be shifted by 1/2. Further, in the stereoscopic image display device 1D, if the element lenses are arranged in a delta arrangement, the integral stereoscopic display unit 10 ₁ and the integral stereoscopic display unit 10 ₂ are vertically shifted by 1 / √3 of the element lens spacing. Just place it.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments.
For example, the stereoscopic image display devices 1, 1B, 1C, and 1D have been described on the premise that the pixel structure of the element image display unit 11 has each RGB color as a sub-pixel, but the present invention has described the three primary colors. It is not limited to. For example, when the pixel structure is an element image display unit having a four-color stripe structure such as RGBY (red, green, blue, and yellow), as shown in FIG. 11, four integral stereoscopic display units 10C (10C ₁ , 10C ₂₎ , 10C ₃ , 10C ₄ ) may be configured as a stereoscopic image display device 1E (fifth embodiment) so as to synthesize light in the same optical path by a half mirror 21.

In the example of FIG. 11, _{the pixel structure of the element image display unit 11C 1 is} an array of sub-pixels of “RGBY”, and the element image display unit 11C ₂ is a pixel structure of an array of sub-pixels of “GRBY” to display an element image. The unit 11C ₃ may have a pixel structure in which sub-pixels of “BYRG” are arranged, and the element image display unit 11C ₄ may have a pixel structure in which sub-pixels of “RGBY” are arranged.

As a result, when the observer M visually recognizes the three-dimensional image T to be reproduced, the stereoscopic image display device 1E can emit colored light in which all of RGBY are mixed in sub-pixel units in all the lines of sight, and the observer can emit the color light. A stereoscopic image T without color moiré can be displayed on M.

Further, although the sub-pixels of the pixel structure have been described as having vertical stripes, the pixel structure may be horizontal stripes. In that case, the stereoscopic image display device may be configured by regarding the plan views of FIGS. 5, 6, 9, 9, 10 and 11 as side views.

1,1B, 1C, 1D, 1E 3D image display device 10 Integral 3D display unit 11 Element image display unit 12 Lens array 12a Element lens 20 Cross half mirror (optical compositing unit)
21 _1, 21 ₂ half mirror (compositing unit)
T Solid image E Element image P pixel S Shielding plate H Aperture

Claims (8)

It is a stereoscopic image display device that displays a color stereoscopic image by the integral stereoscopic method.
An element image display unit that displays the integral three-dimensional color element image in a two-dimensional array on the display surface and an element lens associated with the element image are two-dimensionally arranged on the display surface side of the element image display unit. With a lens array, multiple integral stereoscopic displays,
It is provided with an optical compositing unit that optically synthesizes a stereoscopic image reproduced by the plurality of integral stereoscopic display units.
For each element image display unit of the plurality of integral stereoscopic display units, the colors of the sub-pixels of the pixel structure are arranged so that at least two colors are mixed in the stereoscopic image synthesized by the optical compositing unit at an arbitrary viewpoint position. A stereoscopic image display device characterized by this. It is a stereoscopic image display device that displays stereoscopic images of the three primary colors by the integral stereoscopic method.
An element image display unit that displays the integral three-dimensional color element image in a two-dimensional array on the display surface and an element lens associated with the element image are two-dimensionally arranged on the display surface side of the element image display unit. With a lens array, three integral stereoscopic displays, and
It is provided with an optical compositing unit that optically synthesizes a stereoscopic image reproduced by the three integral stereoscopic display units.
For each element image display unit of the three integral stereoscopic display units, the colors of the sub-pixels of the pixel structure are arranged so that the stereoscopic images synthesized by the optical compositing unit are mixed with the three primary colors at an arbitrary viewpoint position. A stereoscopic image display device characterized by this. The element lenses of the lens array are a square lattice array.
The second aspect of the present invention, wherein the integral stereoscopic display unit is arranged so as to be displaced by 1/2 of the element lens spacing in the vertical direction and the horizontal direction with respect to the other integral stereoscopic display unit. Stereoscopic image display device. The element lenses of the lens array have a delta array and
2. The stereoscopic image display device described. It is a stereoscopic image display device that displays stereoscopic images of the three primary colors by the integral stereoscopic method.
An element image display unit that displays the integral three-dimensional color element image in a two-dimensional array on the display surface and an element lens associated with the element image are two-dimensionally arranged on the display surface side of the element image display unit. Two integral stereoscopic displays with a lens array,
It is provided with an optical compositing unit that optically synthesizes a stereoscopic image reproduced by the two integral stereoscopic display units.
One and a lens array the integral three-dimensional display section the elemental image display section of, in the arrangement direction of subpixels of the elemental image display section, and staggered by 1/2 of the sub-pixel,
Sub-pixels with a pixel structure so that the stereoscopic image synthesized by the optical compositing unit is mixed with two of the three primary colors at an arbitrary viewpoint position for each element image display unit of the two integral stereoscopic display units. A stereoscopic image display device characterized by arranging the colors of. The element lenses of the lens array are a square lattice array.
The fifth aspect of claim 5, wherein one of the integral stereoscopic display units and the other integral stereoscopic display unit are arranged so as to be offset by 1/2 of the element lens spacing in the vertical direction and the horizontal direction. Stereoscopic image display device. The element lenses of the lens array have a delta array and
The stereoscopic image according to claim 5, wherein one of the integral stereoscopic display units and the other integral stereoscopic display unit are arranged vertically shifted by 1 / √3 of the element lens spacing. Display device. 3. The stereoscopic image display device according to any one of the following items.

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