JP2003029205A - Color stereoscopic display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate trouble that light utilization efficiency is not good and a video becomes dark in the case of using a diffusion layer having an aperture, trouble that adjustment for eliminating the directivity of each color is troublesome and the directivity thereof is not perfectly eliminated to cause anxiety that a color spot is made in the case of projecting the video to a screen consisting of lenticular lenses, and trouble that the alignment of a projected picture with each of the lenses of the lenticular lens must be strictly performed every time. SOLUTION: A display panel 2 such as a liquid crystal display and a lenticular lens sheet 3 are arranged while being made to correspond to each other at the rate of one pitch of a lens to two pitches of a pixel, and light becomes from the right and left pixels of each of the lenticular lenses are transmitted to each of observation positions (for example, both eyes 7L and 7R), and picture elements 6L and 6R for the respective observation positions are constituted of three primary colors R, G and B from the adjacent lenticular lenses, then the display of a stereoscopic picture based on parallax is realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color stereoscopic display device in which an arbitrary display panel such as a liquid crystal display and a lenticular lens sheet are combined.

[0002]

2. Description of the Related Art As a display device of a television or a computer, a display device capable of displaying a flat image is often used. The three-dimensional arrangement can be easily understood, which can bring advantages.

FIG. 6 is a view showing an example in which three-dimensional display is conventionally tried in a liquid crystal display device or the like, and a portion having a reference numeral 2 which is color-coded on the lower surface side is a region of three primary colors constituting the liquid crystal display device. A display panel (or reference numeral 2 may be regarded as an area of each color of the color filter), which is an aggregate of pixels as a minimum unit, is shown, and each of the areas R, G, and B of the display panel 2 is shown. , Intensity-controlled red, green, and blue light is emitted, and the emitted light is refracted and condensed by each lens of the lenticular lens 11, and the upper portion corresponding to the condensing part of the lenticular lens 11 After passing through the aperture 12a of the diffusion layer 12 provided in the above, the light is converged in an appropriate direction by the lenticular lens 11 'on the upper surface side.

On the display panel 2, from the left side, an image for the left eye (displayed as "left") and an image for the right eye (displayed as "right") in units of pixels of the three primary colors R, G, and B. Pairs are formed, and one pixel is set for each pair, and in the figure, they are densely arranged in the horizontal direction. Each lens of the lenticular lens 11 on the lower surface side,
The image is provided corresponding to the left-eye image and the right-eye image that configure one pixel, and the light is transmitted through the aperture portion (aperture) 12a corresponding to each image. Aperture 12a
The emitted light is refracted by the lenticular lens 11 ′ provided corresponding to each pair of the image for the left eye and the image for the right eye, so that the image for the left eye is directed upward in the right direction, When the right-eye image converges upward in the left-hand direction, parallax occurs, and the stereoscopic effect of the image can be obtained by viewing the left-eye image and the right-eye image at the same time. In addition, instead of using the diffusion layer 12 having the apertures 12a as described above, the light from the display panel 2 may be projected on the screen including the lenticular lens 11 '.

However, in the above-mentioned method, since the light from the display panel 2 is narrowed down by the aperture 12a, the utilization efficiency of the light is inferior and the disadvantage that the image is dark is inevitable. Also,
Since the pixels are composed of pixels of the three primary colors of R, G, and B, each of these three pixels must be condensed on the lower surface of the lenticular lens 11 'to be white light, and then the directivity must be lost. As a result, the converging position shifts for each pixel, and depending on the position on the viewing side, only one pixel can be seen and only a monochromatic image can be seen. In order to solve this problem, it is complicated to arrange the lenticular lenses 11 and 11 'on both surfaces of the diffusion layer 12 so as to be strictly aligned with each other, and further to be aligned with the projected image. In any of these cases, adjustment for improving the placement accuracy is troublesome, and it is difficult to completely eliminate directivity, and therefore color spots may occur. In addition, even in the method of projecting on a screen, there is an inconvenience that the projected image and each lens of the lenticular lens must be precisely aligned with each other.

[0006]

In the present invention, when the diffusion layer 12 having the apertures 12a is used, the utilization efficiency of light is poor and the image becomes dark, and when the image is projected on a screen made of a lenticular lens. In addition, it takes time to adjust to eliminate the directivity of each of the three primary colors, without completely eliminating the directivity, there is a concern that color spots may occur, and when projecting on a screen made of a lenticular lens, It is an object of the present invention to solve the problem that the projected image and each lens of the lenticular lens must be aligned exactly each time.

[0007]

According to the above-mentioned problems, in the prior art, the left-eye image and the right-eye image each consisting of three pixels of three primary colors were made to correspond to the left and right of the lenticular lens. One pixel for each of the three primary colors,
It was able to be solved by making it correspond to the left and right of the lenticular lens.

According to a first aspect of the present invention, a display panel formed by arranging a large number of pixels at a constant pitch and a lenticular lens sheet having a lens surface in which a large number of lenticular lenses are arranged in the width direction of the lens are arranged to face each other. And each pixel of the lenticular lens sheet is arranged to correspond to one pixel group of two pixels, and the display panel is
It consists of a pixel set for one eye consisting of a set of pixels to which each of the three primary colors is assigned to one side of each of the three adjoining pixel groups, and a set of pixels to which each of the three primary colors is assigned to the other side. The present invention relates to a color stereoscopic display device characterized by being composed of pixels for the other eye. The second invention is the same as the first invention,
The three primary colors are red, green, and blue, and each of the pixels of the display panel has red, green, and
The present invention relates to a color stereoscopic display device, in which blue and blue are repeatedly allocated in order. Third
In the first invention, in the first invention, the three primary colors are red, green, and blue, and each of the pixels of the display panel has two same colors of red, green, and blue adjacent to each other. The present invention relates to a color stereoscopic display device characterized by being repeatedly allocated in order so as to match. In a fourth aspect of the present invention, a display panel configured by arranging a large number of pixels at a constant pitch and a lenticular lens sheet having a lens surface in which a large number of lenticular lenses are arranged in the width direction of the lens are arranged to face each other. , Lens 1 of the lenticular lens sheet
One pixel group consisting of n (where n is a natural number of 2 to 20) pixels is arranged to correspond to each other, and the display panel displays each of the three adjacent pixel groups. Of the n pixels that make up,
The same number of pixels counted from one side consists of each set of pixels to which each of the three primary colors is allocated, and each set of the pixels is, in the order counted from the one side, the lens of the lenticular lens sheet. The present invention relates to a color stereoscopic display device, which comprises pixels to be sequentially sent to each of n observation positions set on the surface side. In a fifth aspect based on any one of the first to fourth aspects, the lens surface of the lenticular lens sheet is flattened by being filled with a low refractive index layer having a refractive index lower than that of the material of the lenticular lens sheet. The present invention relates to a color stereoscopic display device. According to a sixth aspect of the present invention, in the fifth aspect, at least one of the material of the lenticular lens sheet and the material of the low refractive index layer is made of a material having a variable refractive index. The present invention relates to a color stereoscopic display device. The seventh invention is
In any one of the first to sixth inventions, the present invention relates to a color stereoscopic display device in which a prism sheet having a sawtooth prism surface in cross section on the observation side is arranged on the most observation side. An eighth invention is the color stereoscopic display according to the seventh invention, wherein the prism surface is flattened by being filled with a layer having a refractive index lower than that of the material of the prism sheet. It relates to the device. In a ninth aspect based on the eighth aspect, at least one of the prism sheet layer and the layer for filling and flattening the prism surface of the prism sheet is made of a material having a variable refractive index. And a color stereoscopic display device. Tenth
In the invention of any one of the first to ninth aspects, the distance between the observation position and the surface of the lenticular lens sheet is L
(Unit: mm), where n is the number of set observation positions and w is the pixel width, 3 × n × w <(L × π) / (60 × 180) It relates to the device.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1A shows a color filter 2 and a lenticular lens in a color stereoscopic liquid crystal display device to which the present invention is applied, which can give a stereoscopic effect when viewed with both left and right eyes. It is a figure which shows the part which combined and arranged the sheet | seat 3. In the figure, the color filter 2
Is a micro color filter of each color of blue, red, and green (displayed by B, R, and G in order) from the left side of the figure, and is repeatedly arranged in this order at a constant pitch in the horizontal direction, and in the vertical direction. Are repeatedly arranged at a fixed pitch. It should be noted that a large number of lenticular lenses and a small number of pixels (here, minute color filters) are drawn, including the following figures. Further, the lenticular lens sheet 3 has a lens surface in which a large number of lenticular lenses are arranged at a constant pitch in the width direction of the lens, and the illustrated one has the lens surface on the back side of the drawing. The color filter 2 and the lenticular lens sheet 3 are arranged such that each lenticular lens corresponds to one micro color filter group 2a, which is usually composed of two micro color filters.

A color stereoscopic liquid crystal display device is shown in FIG.
As shown in (c), a backlight 5, a liquid crystal panel 4, a color filter 2, and a lenticular lens 3 which are sandwiched between two electrode sheets each having a liquid crystal layer on the inner surface of which is a transparent electrode on the inner surface of the glass. Then, by applying a potential between both electrodes of the liquid crystal panel, the amount of white light transmitted from the backlight 5 is controlled, and the color filter 2 emits light of each color of red, blue, and green to the upper surface side. It is a thing. The display device is a CRT.
(CRTs), plasma display panels, and other types that emit light themselves, but in any case, the entire display device emits red, blue, and green light to the viewing side. , Including the case of quoting in the following description, a display in which pixels for displaying each of the three primary colors such as R, G, and B are arranged at a constant pitch in the diagram of the color filter 2 in FIG. A panel is used, and it does not matter whether it is a liquid crystal display or a plasma display. Also, the letters R, G, or B may often indicate pixels of each color.
Here, the three primary colors are three colors in the case of additive color mixing (additive mixing) consisting of red, green, and blue, but three colors of blue, red, and yellow in the case of subtractive color mixing (subtractive mixing). Can also be used.

As shown in FIG. 1B, in the figure, three pixels 2a adjacent to each other on the lower display panel 2 of each lenticular lens are located in the left half of the pixel, that is, 1 from the left. The third B, the third G,
And every third selected pixel (6L in the figure), such as the fifth R (enclosed in circle in the figure).
The light emitted from each pixel is refracted by the lenticular lens 3 above each pixel and can be observed by the left eye 7L. The pixel in the right half of the pixel group 2a, that is, selected above. Between the two pixels, that is, light emitted from every other three pixels (indicated by 6R in the figure) selected every other one, such as the second R, the fourth B, and the sixth G from the left side. The generated light is refracted by the lenticular lens 3 above each pixel and can be observed by the right eye 7R. In addition, in the following, the right refers to the right in the figure, unless otherwise specified.
Also, the left refers to the left in the figure,
Since the observer is facing the front side of the figure, the left eye of the observer is on the right side in the figure, and the right eye is on the left side in the figure. Also in the example of the multi-view type described later, the left and right for multiple eyes are the same as the left and right in the case of two eyes, and as the left and right of the figure, assuming that the observer of the multi-eye is facing the front side of the figure. The opposite is assumed. Therefore, by allocating each of the three primary colors to the left side of each pixel group 2a of the display panel and similarly to the right side of each pixel group 2a, the left eye is formed by a set of three pixels on the left side of adjacent pixels. It is possible to configure a pixel for 7L and a pixel for the right eye 7R by a set of three adjacent pixels. That is, six pixels are used for both eyes.

In the color three-dimensional liquid crystal display device 1 described above, one lenticular lens is associated with every two pixels so that every other pixel light is emitted from the left eye 7L.
Alternatively, since it can be sent to the right eye 7R, in the example of FIG. 1, the right eye 7R produces an image by repeating the R, B, and G pixels 6R in order, and the left eye 7L produces an image.
An image obtained by repeating the pixels 6L of B, G, and R in order can be seen, and one color is determined for every 3 pixels shown by 6R and 6L, and each pixel constituting these 6R or 6L is determined. Is not resolved by the left and right eyes, that is, as long as the pixels are sufficiently small with respect to the viewing distance, the color stereoscopic liquid crystal display device 1 as a whole can see a color stereoscopic image.

The color stereoscopic display device 1 of the present invention may have the following structure capable of sending the light of each pixel to the left eye 7L or the right eye 7R alternately. Figure 2
A state in which a display panel that may be a color filter 2 and a lenticular lens 3 are arranged in combination is shown.
G, B, B, ..., Two pixels of the same color are repeatedly arranged in the horizontal direction in this order, and arranged in the vertical direction at a constant pitch, and the color filter 2 and the lenticular lens described above are arranged. The sheet 3 is one of the pixel groups 2a consisting of two pixels for each lenticular lens.
They are arranged so that they correspond to each other.

As shown in FIG. 2 (b), the light emitted from the pixel R on the left side of the pixel group 2a consisting of two red pixels R, R under the first lenticular lens from the left is The light that is refracted by the lenticular lens above each pixel and can be observed by the left eye 7L, and similarly, the light emitted from the pixel G on the left side of the pixel group 2a below the second lenticular lens from the left side, Also, the light emitted from the pixel B on the left side of the pixel group 2a located below the third lenticular lens from the left side can be observed by the left eye 7L. The light emitted from the R, G, and B pixels on the right side of the pixel group 2a below each lenticular lens can be observed by the right eye 7R. Therefore, R, G, and B selected from the left side of each of the minute color display groups 2a of the display panel 2 in which the groups of minute color table areas in which two pixels of the same color are arranged are arranged, pixels for the left eye, and If pixels for the right eye are set in R, G, and B selected from the right side, one pixel for stereoscopic viewing is set by both of these pixels, and in the example described with reference to FIG. Similarly, the color stereoscopic display device 1 as a whole can view a color stereoscopic image.

In the color stereoscopic display device 1 of the present invention, as in the above-mentioned two examples, one lenticular lens is arranged for every two pixels and the light of each pixel is sent to the left eye or the right eye. Since the structure is adopted, it is possible to display a single color or a double tone, and it is possible to perform a three-dimensional display in units of 2 pixels for a single color and 4 pixels for a double tone. In addition, the stereoscopic display device of the present invention can also provide one lenticular lens for pixels of number n of 3 or more to perform n-eye type (multi-eye type) stereoscopic display. Therefore, the above-mentioned binocular system viewed with both the left and right eyes is an example of the multi-view system. Even in the multi-view type,
Similar to the twin-lens type, there may be a single color display or a color display, but since there is no essential difference, a case of color stereoscopic display will be described below. In addition, n of n-eye type (multi-eye type) is
It is a natural number of 2 or more and can be made large, but from the viewpoint of the number of pixels, production accuracy, and image brightness, it is practically 20.
The following is preferable.

In FIG. 3, one lenticular lens is arranged corresponding to every 6 pixels so that it can be observed by six observation eyes whose positions are set at equal intervals on the lens surface side.
FIG. 3 is a diagram showing an example of performing an eye-type stereoscopic display, in which a display panel 2 includes a first lenticular lens from the left, and a first pixel from the left in order of R, G, B, R, G, and B pixels. 1 pixel group 2a is arranged, and G is arranged from the left side under the second lenticular lens from the left side.
A second pixel group 2a composed of pixels in the order of B, R, G, B, and R, and further below the third lenticular lens from the left side of the B, R, G, B, R, and G from the left side. The third pixel group 2a composed of pixels in order is arranged, and thereafter, the first, second, and third pixel groups are repeated.

Any of the light emitted from the first pixel from the left side of each pixel group 2a of the display panel 2 as described above is "leftmost" of the six eyes for observation (in the drawing, it faces toward the leftmost side). Light emitted from the second pixel from the left is sent to the eye for observation (rightmost), and 2 from the right in the figure.
It is sent to the eye for observation at the th th observation, and thereafter, similarly, it is sent to the eye for observation at a position corresponding to the order counted from the left side in each pixel group 2a.

Pixels in the same order (= the same number) counting from the left side in each of the above groups are, for example,
Pixels corresponding to the same camera angle of an image taken by sequentially changing the camera angle of the object to be photographed can be configured. For example, the first pixel R from the left side of each group of pixels of the display panel 2 can be formed. , G, and B (pixels marked with R, G, and B surrounded by circles in FIG. 3) constitute the pixels of the image taken from the leftmost side of the subject, and the emitted light is , The observation eye is set to be sent to the “leftmost” (rightmost in the figure) eye, and for the subsequent second, third, ... pixels, the shooting position and the emitted light are set. By setting the observation eye to be sent to be shifted to the right, it is possible to view images with different camera angles depending on the position of the observation eye.

As shown in FIG. 3, the arrangement order of the pixels in each of the pixel groups 2a of the display panel 2 is the order of R, G, B, R, G, B in the first pixel group, and the second pixel. The arrangement order is different from each other, such as G, B, R, G, B, and R in the group, and B, R, G, B, R, and G in the third pixel group. The reason for this is that all pixel groups have the same pixel arrangement order, for example, R, G, B,
When R, G, B, ... Are repeated, when one lenticular lens is arranged for every 6 pixels as shown in the example of FIG. 3, the color of the first pixel of each pixel group becomes the same. This is to prevent the color display from becoming impossible. When the number of pixels corresponding to one lenticular lens is arranged for each pixel that is a multiple of 3, such as 3, 6, 9, 12, ..., It is necessary to make the pixel arrangement order in each pixel group different from each other. However, when the number of pixels corresponding to one lenticular lens is other than a multiple of 3, the array on the display panel 2 repeats R, G, B, R, G, B, ... It doesn't matter.

In the multi-view color stereoscopic display device, as described with reference to FIG. 2, a plurality of pixels corresponding to one lenticular lens can be formed in the same color. 4 is similar to that of FIG.
This is an example in which 6-eye type stereoscopic display is performed. In the display panel 2, the six pixels of the first pixel group 2a from the left are represented by R and the six pixels of the second pixel group 2a from the second are displayed. Pixel with 6 G 3rd 3rd pixel group 2
The six pixels of a are composed of six Bs, respectively.

The first pixel R, G, and B from the left side of each pixel group 2a of the display panel 2 as described above.
Any of the light emitted from the
It is sent to the “leftmost” (rightmost in the figure) observation eye, and in the same way, the second pixel R, G from the left side in the same way.
And the light emitted from B are sent to the “second from the left” (second from the right in the figure) for observation among the six eyes, depending on the position in each pixel group. Sent to the eye for position observation.

In the example described with reference to FIG. 4, since a plurality of pixels corresponding to one lenticular lens are formed in the same color, the pixel groups 2a corresponding to adjacent lenticular lenses are selected from the same position. The colors of the pixels are always different, and as described above, even if the number of pixels corresponding to one lenticular lens is a multiple of 3, the color of the first pixel of each group is the same. There is no.

In the color stereoscopic display device of the present invention,
As the lenticular lens sheet 3, it is possible in principle to use a normal lenticular lens whose cross-sectional shape is a circle, an ellipse, or a part of a quadratic curve such as a parabola. When arranging the lens surface of the lenticular lens sheet 3 on the observation side, since the lens surface has irregularities, scratches and dirt may be caused. It may be possible to reduce these fears.

FIG. 5 shows an example in which the lens surface (upper surface in the figure) of the lenticular lens sheet 3 is covered with the low refractive index layer 8 to fill the unevenness of the lens surface and to flatten the upper surface. Layer 9
And 10 will be described later. By flattening the lens surface in this manner, an effect of preventing scratches and dirt is produced. Here, it is assumed that the lenticular lens sheet 3 is a relatively high refractive index layer, and the coated low refractive index layer 8
If the difference in the refractive index between and is increased, the observation position illustrated by the eye 7 can be brought closer to the lenticular lens sheet 3, and if the difference in the refractive index is decreased, the observation position is moved away.

Therefore, by changing either the lenticular lens 3 or the low refractive index layer 8, the focal length of the lenticular lens sheet including the low refractive index layer 8 can be changed even if the lens shape is the same. For example, by making the focal length of the lenticular lens sheet including the low-refractive index layer 8 sufficiently long, the stereoscopic display may be a normal flat display so as not to cause parallax between the left and right eyes in the twin-lens system. it can. At least one of the lenticular lens of the lenticular lens sheet 3 or the low refractive index layer 8 is made of a material such as liquid crystal having a variable refractive index, and the focal length of the lenticular lens sheet including the low refractive index layer 8 is variable. May be When using a liquid crystal with a variable refractive index, the focal length can be changed by controlling the potential applied to the liquid crystal, so the distance from the observer can be detected and the focus can be adjusted so that the viewer can see a stereoscopic image. It is also possible to adjust the distance.

As the size of the color stereoscopic display device of the present invention becomes larger, the peripheral portion of the color stereoscopic display device has a larger angle difference from the same observation position than the central portion. Therefore, in the example described above. , If only two pixels or six pixels of the display panel are arranged with the same dimensions per pitch of the lenticular lens, the optical correspondence between the lenticular lens and the pixels may not be obtained in the peripheral portion. obtain. Therefore, the pitch of the lenticular lens is made somewhat smaller than a predetermined dimensional ratio between the pixels of the display panel 2 and the lenticular lens, or the optical axis of the lenticular lens becomes closer to the peripheral part, and the lenticular lens sheet central part is formed. It is preferable to incline above the line.

In the color stereoscopic display device of the present invention, a prism sheet 9 having a prism surface with a sawtooth-shaped cross section on the observation side may be disposed on the observation side of the lenticular lens sheet 3. The observation position can be shifted, and light is sent to the right side (the direction of the arrow) shown by the dotted line in the figure. The prism sheet 9 has unevenness on the upper surface in the figure, and therefore, like the lenticular lens sheet 3, the prism surface may be scratched or dirty, so that the prism surface is flattened by another layer 10. By doing so, it is possible to reduce these fears (FIG. 5).

The refractive index of the layer 9 is preferably relatively high as compared with the refractive index of the layer 10, and the observation position can be greatly shifted by increasing the difference between the refractive indexes of the two layers.
Further, either the layer 9 or the layer 10 may be made of a material such as liquid crystal having a variable refractive index, and the focal length of the lenticular lens sheet including the layers 9 and 10 may be variable.

In the color stereoscopic display device of the present invention,
If necessary, measures can be taken to improve the surface performance of the color stereoscopic display device. For example, as measures for them, antireflection property, surface hardness (due to hard coat), antiglare property, or antistatic property can be given. Since these measures are usually performed by a coating method on a flat surface,
As described above, it is preferable to apply the lenticular lens sheet 3 in which the lens surface is filled and flattened, or the prism sheet on the surface of the most observable side is filled and flattened.

In the color stereoscopic display device of the present invention, various measures may be taken so that the light (image light) from the display panel is effectively directed toward the observer, for example, a prism or a linear Fresnel lens. These measures can be given by disposing a circular Fresnel lens, a two-dimensional convex lens, a three-dimensional convex lens, or the like at an appropriate position.

As described above, in the color stereoscopic display device of the present invention, in a pixel including one pixel of each of three primary colors, unless each pixel is resolved, a color stereoscopic image is displayed in the entire color stereoscopic display device 1. It becomes possible to view. As shown in FIG. 1B, three adjacent
To recognize R, B, and G, or B, G, and R from one pixel group 2a as one pixel,
For an observer whose visual acuity is 1.0, the angle θ at the observation position of the line connecting both ends of these 6 pixels and the eye is
If the angle is within 1 minute, each pixel is not resolved.

Therefore, if the distance between the observation position and the surface of the lenticular lens sheet 3 is L (unit: mm), the number of observation positions (= the number of multi-eyes) is n, and the pixel width is w, then 3 Since the total width of × n pixels is within 1 minute, for a minute angle θ of about 1 minute, tan θ =
Since θ, the following equation holds. That is, 3 × n × w <
(L × π) / (60 × 180). If L is 2, 5
00mm (= 2.5m), 5-lens type (n = 5)
w <2500 × π / (60 × 180 × 3 × 5) = 0.0
485, and if the width per pixel is 48 μm or less, it is not resolved under this condition, so that a color stereoscopic image can be viewed.

Or, showing an example of how much the observation distance L needs to be taken when the width per pixel is fixed, pixel width: 40 μm, two-lens type (n =
In the case of 2), L> 3 × 2 × 0.04 × 60 × 180 / π
= 825, and if the observation distance is 825 mm or more,
Since it does not have the resolution equal to or less than the width of 6 pixels, it is possible to view a color stereoscopic image.

Next, a more practical color stereoscopic display device of the present invention will be shown by giving some manufacturing examples.

(Manufacturing Example 1) As the display panel, a liquid crystal display having a horizontal pixel number of 3,840, a pixel number of 11,520, and a vertical pixel number of 2,400 was used.
The color of the color filter of each pixel is from the left side,
R, G, and B are repeated in this order. One lenticular lens is associated with every 2 pixels in the horizontal direction of this display panel. Therefore, a lenticular lens sheet with a total number of lenticular lenses of 5,760 is closely attached to the front surface of the display panel so that the lens surface is on the observer side. Let As a result, a video signal corresponding to the horizontal resolution of the high definition display could be sent to the left and right eyes.
In the right eye, the signal corresponding to RBG, and in the left eye, G
The colors based on the signals corresponding to RB are visible, and the color stereoscopic image can be viewed as a whole.

(Manufacturing Example 2) A display panel having the same specifications as in Manufacturing Example 1 is used, and one lenticular lens is associated with every 6 pixels in the horizontal direction of the display panel. Therefore, the total number of lenticular lenses is 1,920. The lenticular lens sheet of No. 3 was brought into close contact with the front surface of the display panel with the lens surface facing the viewer. As a result, the horizontal resolution was 640 (= 3,840 ÷ 6), and a 6-eye stereoscopic image could be displayed with the resolution of a normal TV signal. However, the array of color filters for each pixel is
The color filter array of pixels corresponding to the first lenticular lens from the left is RGBRGB, the color filter array of pixels corresponding to the second lenticular lens is GBRGBR, and the third lenticular lens is changed for each lenticular lens. The color filter array of pixels corresponding to the lens is
G, RGB, GB at each position of 6 eyes
The colors corresponding to R and BRG were made visible, and the signal for displaying the display panel was also changed to match the arrangement of the color filters of this pixel.

(Manufacturing Example 3) As in Manufacturing Example 2, one lenticular lens is made to correspond to every 6 pixels in the horizontal direction of the display panel, and the color filters of 6 pixels corresponding to each lenticular lens are made the same color. That is, RRRRRR, GGGGGG, BBBBBBB, and so on, and this process is repeated thereafter. As a result, it was possible to display a 6-eye type stereoscopic image having the same horizontal resolution as that of Manufacturing Example 2.

(Manufacturing Example 4) Using a display panel having the same specifications as in Manufacturing Example 1, one lenticular lens is associated with every 5 pixels in the horizontal direction of the display panel. Therefore, the total number of lenticular lenses is 2,304. The lenticular lens sheet of No. 3 was brought into close contact with the front surface of the display panel with the lens surface facing the viewer. In this case, it is not necessary to change the arrangement of the color filter of each pixel as in Manufacturing Example 3, and R, G, and B are repeated in this order from the left side. In this case, the horizontal resolution is 7
68 (= 3,840 / 5), Europe, Middle East, Australia,
And horizontal resolution equivalent to TV in China and other countries, 5
It was possible to display an eye-based stereoscopic image.

(Production Example 5) The pixel size of the display panel used was: vertical: 150 μm, horizontal: 50 μm,
The lenticular lens used has a pitch of 10
0 μm, curvature; 450 μm, refractive index of lens portion;
It is 5. In this case, the stereoscopic image could be viewed at a position about 2 m away from the display.

(Production Example 6) The curvature of the lenticular lens was set to 100 μm, and the unevenness of the lens surface on the observation surface side of the lenticular lens sheet was filled with a resin having a refractive index of 1.4 to flatten the surface. . As for the resolution, you can see the same stereoscopic image as in Production Example 1,
The flat side of the lenticular lens sheet on the viewing side provides excellent image contrast, and the low refractive index on the surface reduces reflection, making it difficult to see external lighting and objects on the surface. Can be reduced.

(Production Example 7) As in Production Example 2, except that
Since the lens portion of the lenticular lens sheet is made of liquid crystal having a refractive index that is variable between 1.45 and 1.6, the distance at which a stereoscopic image can be observed can be adjusted.

(Production Example 8) As in Production Example 3, except that
Since the prism sheet and the prism surface of the prism sheet are filled with a liquid crystal having a variable refractive index to be flattened on the observation side, the observation position in the horizontal direction can be adjusted.

[0043]

According to the invention of claim 1, since the pitch of the pixels of the display panel and the pitch of the lenticular lens are arranged in advance in correspondence with each other, there is no problem of adjustment and the diffusion layer is not opened. Since the aperture is not required, the image does not become dark and color spots do not occur, and the light of the three primary colors to compose each pixel on the left and right reaches the left and right eyes separately from the adjacent pixel groups. It is possible to provide a color stereoscopic display device configured to do so and capable of seeing a color stereoscopic image. According to the invention of claim 2, in addition to the effect of the invention of claim 1, the display of the three primary colors of red, green, and blue lights of a commonly used cathode ray tube, liquid crystal display panel, plasma display panel, or the like. It is possible to provide a color stereoscopic display device using a color display panel in which the respective pixels for use are repeatedly arranged. According to the invention of claim 3, in addition to the effect of the invention of claim 1, the display of the three primary colors of red, green, and blue light of a commonly used cathode ray tube, liquid crystal display panel, plasma display panel, or the like. It is possible to provide a color stereoscopic display device using a color display panel in which two pixels for each pixel are repeatedly arranged. According to the invention of claim 4, one lenticular lens is associated with n pixels, and the lenticular lenses adjacent to the n observing positions are arranged so as to transmit light of the three primary colors constituting one pixel. As in the case of observing with both the left and right eyes of the invention of item 1, it is possible to provide an n-eye type color stereoscopic display device in which adjustment problems do not occur, images become dark, and color spots do not occur. According to the invention of claim 5, in addition to the effect of any one of claims 1 to 4, the lens surface of the lenticular lens to be used is filled with a low refractive index layer and is flattened, so that it is scratched. It is possible to provide a color stereoscopic display device that can prevent dirt and dirt and can change the perspective of the observation position by changing the refractive index of each of the lenticular lens and the low refractive index layer. According to the invention of claim 6, in addition to the effect of the invention of claim 5, at least one of the material of the lenticular lens sheet and the material of the low refractive index layer is made of a material having a variable refractive index. Therefore, it is possible to provide a color stereoscopic display device capable of changing the observation position without replacing the lenticular lens sheet or the low refractive index layer. According to the invention of claim 7, claim 1 to claim 6
In addition to the effect of any one of the inventions, by further disposing the prism sheet on the observation side, it is possible to provide a color stereoscopic display device capable of shifting the observation position vertically and horizontally. According to the invention of claim 8, in addition to the effect of the invention of claim 7, since the prism surface of the prism sheet is flattened by being filled with a layer having a low refractive index, scratches and dirt can be prevented. It is possible to provide a color stereoscopic display device capable of changing an observation position vertically and horizontally by combining a prism sheet and a layer having a low refractive index. According to the invention of claim 9, in addition to the effect of the invention of claim 8, at least one of the material of the prism sheet and the layer for flattening by filling the prism surface is made of a material having a variable refractive index. Therefore, it is possible to provide a color stereoscopic display device capable of changing the observation position vertically and horizontally without replacing the prism sheet or the low refractive index layer. According to the invention of claim 10, in addition to the effect of any one of claims 1 to 9, the distance L, the number n of the set observation positions, and the pixel width w define a specific relationship. It is possible to provide a color stereoscopic display device capable of effectively performing multi-view stereoscopic display including an eye type.

[Brief description of drawings]

FIG. 1 is a diagram illustrating an example of a color stereoscopic display device.

FIG. 2 is a diagram showing an example of another color stereoscopic display device.

FIG. 3 is a diagram illustrating an example of a multi-eye color stereoscopic display device.

FIG. 4 is a diagram showing an example of another multi-eye color stereoscopic display device.

FIG. 5 is a diagram showing an example of a color stereoscopic display device to which a function is further added.

FIG. 6 is a diagram showing an example of a conventional color stereoscopic display device.

[Explanation of symbols]

1 color stereoscopic display (3D liquid crystal display) 2 Color filter (display panel) 3 Lenticular lens sheet 4 LCD panel 5 backlight 6 Pixels for the left and right eyes (observation positions) 7 eyes (observation position) 8,10 Low refractive index layer 9 Prism sheet

Claims (10)

[Claims] 1. A display panel formed by arranging a large number of pixels at a constant pitch, and a lenticular lens sheet having a lens surface in which a large number of lenticular lenses are arranged in the width direction of the lens are arranged to face each other. One pixel group of two pixels corresponding to each lens of the lenticular lens sheet is arranged correspondingly, and the display panel has three primary colors on one side of each of the three adjacent pixel groups. Each of which is composed of a pixel for one eye made up of a set of allocated pixels, and the other side is made up of a pixel for the other eye made up of a set of pixels allocated to each of the three primary colors. Color stereoscopic display device. 2. The three primary colors are red, green, and blue, and red, green, and blue are sequentially and repeatedly assigned to each of the pixels of the display panel. The color stereoscopic display device according to claim 1. 3. The three primary colors are red, green, and blue, and each of the pixels of the display panel has two colors of red, green, and blue adjacent to each other, The color stereoscopic display device according to claim 1, wherein the color stereoscopic display device is repeatedly allocated in order. 4. A display panel formed by arranging a large number of pixels at a constant pitch, and a lenticular lens sheet having a lens surface in which a large number of lenticular lenses are arranged in the width direction of the lens are arranged to face each other. One pixel group consisting of n (where n is a natural number of 2 to 20) pixels is arranged to correspond to one lens of the lenticular lens sheet, and the display panels are adjacent to each other. Of the n pixels that make up each of the two pixel groups, each of the three primary colors is assigned to the same pixel counted from one side, and each set of pixels is , Sequentially sent to each of the n observation positions set on the lens surface side of the lenticular lens sheet in the order counted from the one side. A color stereoscopic display device characterized in that it constitutes a pixel to be formed. 5. The lens surface of the lenticular lens sheet is flattened by being filled with a low refractive index layer having a refractive index lower than that of the material of the lenticular lens sheet. Item 3. The color stereoscopic display device according to item 4. 6. The color solid according to claim 5, wherein at least one of the material of the lenticular lens sheet and the material of the low refractive index layer is made of a material having a variable refractive index. Display device. 7. The color stereoscopic display device according to claim 1, wherein a prism sheet having a sawtooth prism surface in a cross section on the observation side is disposed on the most observation side. 8. The color stereoscopic display device according to claim 7, wherein the prism surface is flattened by being filled with a layer having a refractive index lower than that of the material of the prism sheet. 9. The prism sheet layer or at least one layer for filling the prism surface of the prism sheet to planarize the prism sheet is made of a material having a variable refractive index. The described color stereoscopic display device. 10. When the distance between the observation position and the surface of the lenticular lens sheet is L (unit: mm), the number of set observation positions is n, and the pixel width is w, 3 × n × w <(L × The color stereoscopic display device according to any one of claims 1 to 9, wherein π) / (60 × 180).