JPH08194190A - Liquid crystal stereoscopic display device - Google Patents

Abstract

PURPOSE: To make it possible to shorten an adequate viewing distance in spite of a fine pixel pitch, to make luminance uniform at the time of movement of visual points in a transverse direction and to decrease crosstalks by providing a light source device with color separating means for converting the light rays emitted by the device to the set of the very small emitted light rays of respective colors lining up in prescribed order. CONSTITUTION: The front surface on the color liquid crystal panel 1 side of a back light 2 is provided with the color filters 3 in which three primary color filters; blue filters 3a, red filters 3b and green filters 3c line up in order reverse from order of the pixels 1a for blue, pixels 1b for red and pixels 1c for green of the color liquid crystal panel 1. Only the colors of the same colors to the color filters 3a to 3c of the color filters 3 among the light rays emitted from the back light 2 transmit the color filters and the other colors are absorbed. As a result, the light rays emitted from the back light 2 are made into the very small emitted light rays of the stripe form in which the respective colors, blue, red and green, line up in order reverse from order of the pixels 1a to 1c of the color liquid crystal panel 1 and are emitted from the color filters 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal stereoscopic display device, and in particular, it can shorten an appropriate viewing distance even if the pixel pitch is fine.
Moreover, the present invention relates to a liquid crystal stereoscopic display device capable of achieving uniform brightness and reduction of crosstalk when the viewpoint moves laterally.

[0002]

2. Description of the Related Art As a so-called stereoscopic image display device capable of forming a stereoscopic image without using special glasses, for example, FIG.
As shown in FIG. 2, the light emitted from the backlight 2 which emits light in a plane is divided into stripes by the optical filter 4 having the opening 3a and the light shielding portion 3b, and the left eye image I _L and the right eye are line by line on the liquid crystal panel 1. There is a method of alternately forming the images I _R.

In this system, an appropriate viewing distance D from the image forming surface of the liquid crystal panel 1 to a viewpoint where a stereoscopic image can be observed.
Is proportional to the optical distance L ₁ between the image forming surface of the liquid crystal panel 1 and the optical filter 4 as shown in the following mathematical formula 1, and the human eye distance E and the pixel pitch (dot pitch) of the liquid crystal panel 1 are ) Proportional to P minus 1

[0004]

[Equation 1] D = L ₁ × [(E / P) −1]

Here, when a space is not provided between the liquid crystal panel 1 and the optical filter 4 and the liquid crystal panel 1 is brought into close contact with the surface of the optical filter 4, the optical filter 4 and the image forming surface of the liquid crystal panel 1 are separated from each other. Since there is an incident-side glass and an incident-side polarizing plate of the liquid crystal panel 1 between them, the glass thickness is T ₁ , the refractive index is n ₁ , the polarizing plate thickness is T ₂ , and the refractive index is n ₂ . Then, the optical distance L ₁ can be expressed by the following mathematical formula 2.

[0006]

[Formula 2] L ₁ = T ₁ / n ₁ + T ₂ / n ₂

[0007]

It is apparent from the above mathematical formula 1 that the optimum viewing distance D becomes large when the pixel pitch P is made small in order to improve the definition of an image. For example, in the current liquid crystal panel 1, glass meat is used. The thickness T ₁ is 1.1 mm, the glass refractive index n ₁ is 1.53, the polarizing plate thickness T ₂ is 0.2 mm,
Since the refractive index n _{2 of the} polarizing plate is 1.49, when the inter-eye distance E is 65 mm and the high-definition liquid crystal panel 1 having the pixel pitch P of 70 μm is used, the optimum viewing distance is 780 mm, which is a problem in practical use. There is.

Further, when the viewpoint moves laterally, crosstalk is likely to occur in which the right-eye image and the left-eye image enter the field of view at the same time, and in particular, in order to achieve high brightness, the aperture area of each pixel is increased and When the black matrix of No. 2 is made thin, there is a problem that crosstalk is more likely to occur.

On the other hand, if the black matrix is thickened to prevent crosstalk, there is a problem that the luminance is likely to change when the viewpoint moves laterally.

In view of the above circumstances, the present invention makes it possible to shorten the suitable viewing distance even if the pixel pitch is fine, and to make the luminance uniform and reduce crosstalk when the viewpoint moves laterally. It is an object of the present invention to provide a liquid crystal stereoscopic display device.

[0011]

A first stereoscopic display device of the present invention is a liquid crystal stereoscopic display device comprising a light source device which emits light in a plane and a color liquid crystal panel which forms a left-eye image and a right-eye image, In order to achieve this object, the light source device is characterized by comprising color separation means for converting the light emission thereof into a set of minute light emission of each color arranged in a predetermined order.

A second stereoscopic display device according to the present invention is a liquid crystal stereoscopic display device comprising a light source device which emits light in a plane and a black and white liquid crystal panel which forms a left eye image and a right eye image.
The light source device is provided with one light emission for each pixel corresponding to the number of viewpoints of the stereoscopic image, and is provided with color separation means for converting the light emission into a set of minute light emission of red, blue, and green, and the liquid crystal. A color filter corresponding to each color of the color separation means is arranged on the emission side of the panel separately from the liquid crystal panel, and the advancing direction of each color is limited by the emission color on the light source side and the color filter. Is separated into left and right color information.

[0013]

The color liquid crystal panel has a built-in color filter composed of color filters of three primary colors arranged in a predetermined color order in a one-to-one correspondence with each pixel.

Since the filters of the respective colors of this color liquid crystal panel transmit the light of the same color and absorb the light of the different colors, the color of the minute light emission color-separated by the color separation means is the same as the color of the filter of the color liquid crystal panel. The minute light emission of different colors is shielded, and the light emission direction of the light source device is limited for each color.

In a color liquid crystal panel in which pixels of three primary colors are arranged in order, an image of the same color is formed every three pixels. Therefore, considering each color, instead of the pixel pitch P, the pitch of pixels of the same color (hereinafter, the same color is used). The appropriate viewing distance D can be obtained by the above-mentioned mathematical expression 1 using the pixel pitch).

Since the same-color pixel pitch is three times the pixel pitch P, the optimum viewing distance D is shortened to a short distance close to one-third of the conventional value.

Further, as compared with the conventional example in which the light emission of the backlight is divided into stripes by the optical filter, the width of the minute light emission of each color is wider, so that the uniformity of the brightness is improved when the head is moved laterally.

Further, since the pixels which are separated left and right and are displayed are not in close contact with each other, crosstalk does not occur when the head is moved laterally.

Further, when a color filter is arranged on the emission side of the black and white liquid crystal panel, each color filter transmits the light of the same color and absorbs the light of the different color, and therefore each minute light emission color-separated by the color separation means. Of these, minute light emission of a color different from the color of the color filter is shielded, and the light emission of the light source device is limited in its traveling direction for each color. Therefore, the traveling direction of each color (red, green, blue) is limited by the positional relationship between the light emission of the light source device and the color filter arranged on the emission side of the black and white liquid crystal panel, and the advancing direction of each color (red, green, blue) is limited, Separation is possible, and color stereoscopic display is possible even with a black and white liquid crystal panel.

In order to perform color display using the black and white liquid crystal panel, pixels corresponding to the three primary colors are arranged in order and displayed on the black and white liquid crystal panel, so that an image of the same color is formed every three pixels. Therefore, considering each pixel corresponding to each color, the pixel pitch corresponding to the same color (hereinafter, referred to as the pixel pitch of the same color) is used instead of the pixel pitch P, and the expression 1 is used.
Thus, the optimum viewing distance D can be obtained.

Here, since the pixel pitch corresponding to the same color is three times as large as the pixel pitch P, the optimum viewing distance D is shortened to a short distance close to one-third of the conventional one.

Further, as compared with the conventional example in which the light emission of the backlight is divided into stripes by the optical filter, the width of the minute light emission of each color is wider, so that the uniformity of the brightness is improved when the head is moved laterally.

Further, since the pixels which are separated from each other on the left and right to be displayed are not in close contact with each other, crosstalk does not occur when the head is moved laterally.

Moreover, by increasing the optical distance L ₁ without shortening the optimum viewing distance D and disposing the dispersion type liquid crystal panel between the light source device and the color liquid crystal panel or the monochrome liquid crystal panel, this dispersion type The liquid crystal panel can be turned on and off to switch between a state in which the color-separated light emission of the light source device is transmitted and a state in which the separated colors are mixed to become white light and emitted to the liquid crystal panel. Then, when the display is switched to 2D display, the dispersed liquid crystal panels combine the colored lights to emit white light, so that the images of all pixels can be visually recognized by both the left and right eyes, and the resolution during 2D display can be increased. .

[0025]

EXAMPLE A liquid crystal stereoscopic display device according to a first example of the present invention will be described in detail with reference to FIG.

As shown in FIG. 2, in this liquid crystal stereoscopic display device, light emitted from a backlight 2 arranged on the back side of the color liquid crystal panel 1 and transmitted through the color liquid crystal panel 1 is on the front side of the color liquid crystal panel 1. Therefore, the observer observes.

The color liquid crystal panel 1 includes a blue pixel 1a and a red pixel 1 which are formed in stripes.
b and green pixels 1c, and a black matrix 1d between the pixels 1a to 1c.

The backlight 2 emits white light in a planar shape, and on the surface of the backlight 2 on the color liquid crystal panel 1 side, three primary color filters of a blue filter 3a, a red filter 3b and a green filter 3c are colored liquid crystal. The color filter 3 arranged in the reverse order of the blue pixel 1a, the red pixel 1b, and the green pixel 1c of the panel 1 is formed by applying, for example, a dye or a pigment in a stripe shape.

However, forming the color filter 3 on the surface of the backlight 2 is not essential to the present invention, and the color filter 3 is arranged at an arbitrary position between the backlight 2 and the color liquid crystal panel 1. can do.

One color filter 3a to 3c is provided for each of the pixels 1a to 1c corresponding to the number of viewpoints, that is, one color filter 3a to 3c is provided for two pixels in this embodiment in which the number of viewpoints is 2. Arranged correspondingly.

It is not necessary to provide a light-shielding portion such as a black matrix between the color filters 3a to 3c, so that the width of each color filter 3a to 3c in the lateral direction is set to each pixel 1.
It is slightly larger than twice the width of a to 1c.

Of the light emitted from the backlight 2, only the same color as the color filters 3a to 3c of the color filter 3 passes through the color filters 3a to 3c, and the other colors are absorbed. As a result, the light emitted from the backlight 2 has the respective colors of blue, red, and green of the pixels 1a to 1 of the color liquid crystal panel 1.
The stripe-shaped minute light emission arranged in the reverse order of c is emitted from the color filter 3.

Among the color pixels 1a to 1c provided on the color liquid crystal panel 1, for example, the red pixel 1b transmits light of the same color emitted from the color filter 3, that is, red light is transmitted through the color liquid crystal panel 1. However, since it absorbs other blue light and green light,
The blue and green micro emission is blocked and the color filter 3
The direction of the minute light emission is limited for each color.

Therefore, by alternately forming the left-eye image and the right-eye image for each line of red pixels 1b of the color liquid crystal panel 1, a red stereoscopic image can be observed.

In the same manner, since the other blue and green stereoscopic images of red can be observed, the observer can observe the stereoscopic color image in which the three primary colors of blue, red and green are combined.

Since the suitable viewing distance D of the stereoscopic image of each color is determined according to the pixel pitch of each color, that is, the same color pitch, according to the formula 1, the 3 pixel pitch 3P is substituted for the pixel pitch P of the formula 1. The suitable viewing distance is determined, and the suitable viewing distance D is shortened to a short distance close to one third of the conventional one.

Further, each color filter 3a of the color filter 3
Since a light-shielding portion is not provided between 3 c, the width of the minute light emission of each color is wider than in the conventional example in which the light emission of the backlight 2 is divided into stripes by the optical filter 4, and when the head is moved laterally. Brightness uniformity is improved.

Further, since the right and left are separated for each color, the right and left separated pixels do not come into close contact with each other, and crosstalk does not occur.

In this embodiment, the color liquid crystal panel 1 can form a 2D image.

The backlight 2 is not particularly limited as long as it emits light in a plane, but a cold cathode type flat fluorescent lamp or a cathode luminescence flat lamp can be used, for example.

The cold cathode type flat fluorescent lamp is, for example, as shown in FIGS. 3 and 4, a pair of left and right discharges in a glass housing 4 consisting of a front glass panel 4a, a rear glass panel 4b and a peripheral glass frame 4c. The electrodes 5a and 5b are arranged, a fluorescent surface 6 for emitting white light is formed on the back surface of the front glass panel 4a and the front surface of the rear glass panel 4b between both electrodes, and the tip tube 7 is arranged between the discharge electrodes 5a and 5b. To be done.

It is also possible to use a cathode luminescence flat fluorescent lamp as the backlight 2.

The cathodoluminescent flat fluorescent lamp is
For example, as shown in FIG. 5, a back electrode 9 is provided in order from the back side in a glass housing 8 composed of a box-shaped front glass 8a having an open rear surface and a box-shaped rear glass 8b having an open front surface.
A structure in which a line cathode 10, a first grid electrode 11 and a second grid 12 are housed, and a fluorescent film 13 that emits white light in order from the front side and an aluminum thin film 14 as an accelerating electrode are stacked on the back surface of the front part of the front glass 8a. Is equipped with.

The line cathode 10 is supported by the support 15.
Is supported at a position separated from the back electrode 9 by a predetermined distance.

Furthermore, in this embodiment, the color filter 3 made of dye or pigment is used as the color separation means, but a color filter made of a multilayer interference filter can be used instead of the color filter 3.

When a color filter consisting of this multilayer interference filter is used, the backlight 2 except for the necessary light is used.
Since the light is reflected to the side and diffused by the backlight 2 and then reused, the light utilization efficiency can be improved.

In the second embodiment of the present invention, a cold cathode flat fluorescent lamp is used as the backlight 2, and the cold cathode flat fluorescent lamp is built in the color liquid crystal panel 1 as shown in FIG. The color pixels 1a of the color liquid crystal panel 1 are arranged in the order reverse to the color order of the color filters.
The color fluorescent screen 16 is composed of a blue fluorescent light emitting surface 16a emitting blue light, a red fluorescent light emitting surface 16b emitting red light, and a green fluorescent light emitting surface 16c emitting green light having a width slightly larger than the width of two pixels of 1 to 1c. .

In this embodiment, the color phosphor screen 16 itself has a function of a color separating means for converting into a set of minute light emission of red, blue and green arranged in a predetermined order. The principle and effect of color three-dimensional display by the phosphor screen 16 and the color liquid crystal panel 1 are the same as those in the above-described embodiment, and thus detailed description thereof will be omitted to avoid duplication.

In this embodiment, instead of the cold cathode type flat fluorescent lamp, the color filters of the color liquid crystal panel 1 are arranged in the reverse order of the color filters, and the color pixels 1a to 1c of the color liquid crystal panel 1 are arranged. A cathode luminescent flat fluorescent lamp having a color fluorescent film composed of a blue fluorescent light emitting surface emitting blue light, a red fluorescent light emitting surface emitting red light, and a green fluorescent light emitting surface emitting green light having a width slightly larger than the width of two pixels. It may be used as the light 2.

In the third embodiment of the present invention shown in FIGS. 7 and 8, the dispersion type liquid crystal panel 17 is arranged between the color liquid crystal panel 1 and the color filter 3 formed on the front surface of the backlight 2. It

Since the dispersion type liquid crystal panel 17 becomes transparent as shown in FIG. 7 when it is turned on, stereoscopic display can be performed according to the same principle as that of the above-mentioned embodiment, and when it is turned off, it is similar to the diffusion sheet as shown in FIG. Then, the color lights separated by the color filter 3 are combined into white light.

When the white light is emitted, the color liquid crystal panel 1
When the D image is formed, the pixels 1a to 1c on all the lines of the color liquid crystal panel 1 can be seen by the left and right eyes, respectively. Therefore, the pixels 1a to 1c on the line forming the left eye image or the right eye image on each of the left and right eyes. The resolution can be increased and the image quality can be improved as compared with the respective embodiments in which only 1c can be seen.

In the fourth embodiment of the present invention shown in FIG. 9, the color filters 3 are arranged in the same order as the color filters of the color liquid crystal panel 1, and the width of each pixel 1a to 1c of the color liquid crystal panel 1 is arranged. Each of the color filters 3a to 3c having a width slightly larger than the sum of the width four times the width of the black stripe 1d and the width of the four black stripes 1d.

In this embodiment, 4 of the color liquid crystal panel 1 is used.
Four images having different viewpoints are formed for each line, and the red image is displayed on the red pixels R1 to R4 and the blue pixels B1 to B4 are formed.
By forming a blue image on the green image and a green image on the green pixels G1 to G4, four-eye stereoscopic display can be performed.

The fifth embodiment of the present invention shown in FIG. 10 uses a monochrome liquid crystal panel 20 in contrast to the color liquid crystal panel 1 used in the first to fourth embodiments.
Color liquid crystal stereoscopic display is performed.

As shown in FIG. 10, in this liquid crystal stereoscopic display device, the light emitted from the backlight 2 arranged on the back side of the black and white liquid crystal panel 20 and transmitted through the black and white liquid crystal panel 20 is passed through the color filter 30 to be black and white. An observer observes from the front side of the liquid crystal panel 20.

The black and white liquid crystal panel 20 displays a right eye image and a left eye image every other line. In FIG. 10, a grid represents a display pixel, and a thin film transistor (TFT) substrate that constitutes a liquid crystal panel for simplification,
The black matrix and the like are omitted. The liquid crystal panel 20 is a black-and-white liquid crystal panel, but in order to allow an observer to observe a color image, each pixel has information that is a pixel of red (R), blue (B), and green (G). It is formed in a stripe shape. That is, the pixel 20a has a left-eye blue image, the pixel 20b has a left-eye red image, the pixel 20c has a left-eye green image, the pixel 20a 'has a right-eye blue image, and the pixel 20b' has a right image. A red-eye image and a right-eye green image are displayed on the pixels 20c ', respectively.

The backlight 2 emits white light in a planar shape, and a color filter 3 is arranged between the backlight 2 and the liquid crystal panel 20. The color filter 3 includes a blue filter 3a and a red filter 3
b and the three primary color filters of the green filter 3c are the pixel 20a (20a ') for blue, the pixel 20b (20b') for red, and the pixel 20c (20 for green) of the liquid crystal panel 20.
For example, a dye or a pigment is applied in stripes so as to be arranged in the reverse order of c ′).

One color filter 3a to 3c is provided for each of the pixels 20a to 20c corresponding to the number of viewpoints, that is, in this embodiment in which the number of viewpoints is 2, one color filter 3a to 3c is provided for two pixels. Arranged correspondingly.

It is not necessary to provide a light-shielding portion such as a black matrix between the color filters 3a to 3c. Therefore, the width of each color filter 3a to 3c in the lateral direction is set to the pixel 2
It is slightly larger than twice the width of 0a to 20c.

Further, in this embodiment, the color filter 30 is arranged on the emission side of the liquid crystal panel 20. In this color filter 30, three primary color filters of a blue filter 30a, a red filter 30b, and a green filter 30c are blue pixels 20a (20a ') of the liquid crystal panel 20,
Pixel 20b (20b ') for red and pixel 2 for green
It is formed by applying, for example, a dye or a pigment in a stripe shape so as to be arranged in the reverse order of 0c (20c ').

One color filter 30a to 30c is provided for each pixel 20a to 20c corresponding to the number of viewpoints, that is, one color filter 30a to 30c is provided for two pixels in this embodiment in which the number of viewpoints is two. The color filters 30a to 30c are arranged so as to correspond to each other, and the width of each color filter 30a to 30c in the horizontal direction is slightly smaller than twice the horizontal width of each of the pixels 20a to 20c.

Of the light emitted from the backlight 2, only the same colors as the color filters 3a to 3c of the color filter 3 are transmitted through the color filters 3a to 3c, and the other colors are absorbed. As a result, the light emitted from the backlight 2 has blue, red, and green colors of the pixels 20 a to 20 of the liquid crystal panel 20.
The stripe-shaped minute light emission arranged in the reverse order of c is emitted from the color filter 3.

The transmitted light from each pixel 20a to 20c of the liquid crystal panel 20 is given to each filter of the color filter 30. For example, the red filter 30b allows light of the same color emitted from the color filter 3, that is, red light to transmit light from the pixel 20b of the liquid crystal panel 20, but absorbs other blue light and green light. From the observer's point of view, the blue and green minute light emission is blocked by the color filter 30, and the advancing direction of the minute light emission from the color filter 3 is limited for each color.

Therefore, by alternately forming the left-eye image and the right-eye image for each line of red pixels 20b of the liquid crystal panel 20, a red stereoscopic image can be observed.

Similarly, since the other blue and green three-dimensional images of red can be observed, the observer can observe the three-dimensional color image in which the three primary colors of blue, red and green are combined.

As described above, in this embodiment, color stereoscopic display can be performed by using an inexpensive black and white liquid crystal panel which has a better number of steps and a higher yield than a color liquid crystal panel.

Although the color filter 3 is arranged between the backlight 2 and the black and white liquid crystal panel 20 in the above embodiment, the color filter 3 is formed on the surface of the backlight 2. You can also

Further, as a method of realizing a set of minute light emission of red, green and blue, other than using a color filter formed of a dye or a pigment as in the above-mentioned embodiment, it is shown in the above-mentioned embodiment. It is also possible to form a filter from a multilayer film as described above, and in the case of a backlight having a fluorescent surface formed on a flat surface, such as a cold cathode flat fluorescent lamp or a cathode luminescence flat light source, It is also possible to realize this phosphor screen by separately forming red, green, and blue phosphors. In particular, the latter three examples are also advantageous in improving the light utilization efficiency.

Also in the fifth embodiment, as in the third embodiment, the dispersion type liquid crystal panel is arranged between the white liquid crystal panel 20 and the color filter 3 formed on the front surface of the backlight 2 to turn on. Occasionally, stereoscopic display is performed, and when turned off, the color lights separated by the color filter 3 are combined in the same manner as the diffusion sheet to emit white light and the liquid crystal panel 10 is configured to form a 2D color image. You can also

[0071]

As described above, in the liquid crystal stereoscopic display device of the present invention, the light source device is provided with one light emission for each pixel corresponding to the number of viewpoints of the stereoscopic image, and the red light is arranged in a predetermined order. Since a color separation unit for converting into a set of minute light emission of each of blue and green is provided, minute light emission of a color different from the color of the filter of the color liquid crystal panel is shielded from each minute light emission color-separated by the color separation unit, The emission direction of the light source device is limited for each color.

As a result, the suitable viewing distance is determined by the same color pixel pitch of each color obtained by multiplying the pixel pitch by the number of colors separated by the color separation means, and using a high brightness, high resolution color liquid crystal panel with a fine pixel pitch. Also, the proper viewing distance is shortened to a short distance close to one-half of the number of colors to be separated.

Further, as compared with the conventional example in which the light emission of the backlight is divided into stripes by the optical filter, the width of the minute light emission of each color is wider, so that the uniformity of the brightness is improved when the head is moved laterally.

Furthermore, since the right and left separated pixels are not in close contact with each other, crosstalk does not occur when the head is moved laterally.

In the present invention, particularly when the dispersion type liquid crystal panel is arranged between the light source device and the color liquid crystal panel, the respective colors separated by the color separation means are kept separated by turning on the dispersion type liquid crystal panel. The light can be transmitted, or the dispersion type liquid crystal panel can be turned off to change into white light in which each color is mixed and emitted.

When the 2D display is performed, the dispersion type liquid crystal panel is turned off to change the color into white light and emit the white light so that the images of all lines can be viewed by the left and right eyes. As a result, the resolution can be increased and high quality images can be viewed.

Further, according to the present invention, color stereoscopic display is possible even if a black and white liquid crystal panel without a built-in color filter is used, and the panel cost can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a principle diagram of a conventional liquid crystal stereoscopic display device.

FIG. 2 is a principle diagram of a liquid crystal stereoscopic display device according to a first embodiment of the present invention.

FIG. 3 is a front view of a general cold cathode flat fluorescent lamp.

4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is a perspective view of a general cathode luminescence flat fluorescent lamp.

FIG. 6 is a principle view of a liquid crystal stereoscopic display device according to a second embodiment of the present invention.

FIG. 7 is a principle view of a liquid crystal stereoscopic display device according to a third embodiment of the present invention.

FIG. 8 is a principle view of a liquid crystal stereoscopic display device according to a third embodiment of the present invention.

FIG. 9 is a principle view of a liquid crystal stereoscopic display device according to a fourth embodiment of the present invention.

FIG. 10 is a principle view of a liquid crystal stereoscopic display device according to a fifth embodiment of the present invention.

[Explanation of symbols]

 1 Color Liquid Crystal Panel 2 Backlight 3 Color Filter 16 Color Fluorescent Surface 16a Blue Fluorescent Light Emitting Surface 16b Red Fluorescent Light Emitting Surface 16c Green Fluorescent Light Emitting Surface 20 Monochrome Liquid Crystal Panel 30 Color Filter

[Procedure amendment]

[Submission date] October 13, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction content]

[0002]

2. Description of the Related Art One of so-called three-dimensional image display devices capable of forming a three-dimensional image without using special glasses, for example, a light source is divided into stripes and is incident on the left and right eyes. There is one that separates light. In this method, as shown in FIG. 1, the optical filter 40 having an opening 40a and a light shielding portion 40b for the light emission of the backlight 2 which emits light in a planar shape.
Are divided into stripes, and the left-eye image I _L and the right-eye image I _R are alternately formed on the liquid crystal panel 1 for each line.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0033

[Correction method] Change

[Correction content]

Among the color pixels 1a to 1c provided in the color liquid crystal panel 1, for example, the red pixel 1b transmits light of the same color emitted from the color filter 3, that is, red light, but transmits other blue light. Since green light is absorbed, from the viewpoint of an observer, blue and green minute light emission is blocked, and the direction of travel of the minute light emission of the color filter 3 is limited for each color.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Change

[Correction content]

Since the appropriate viewing distance D of the stereoscopic image of each color is determined according to the pixel pitch of each color, that is, the pixel pitch of the same color according to Expression 1, the pixel pitch P of Expression 1 is substituted by the 3 pixel pitch 3P. The appropriate viewing distance is determined,
The suitable viewing distance D will be shortened to a short distance close to one-third of the conventional one.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0064

[Correction method] Change

[Correction content]

The transmitted light from each pixel 20a to 20c of the liquid crystal panel 20 is given to each filter of the color filter 30. For example, the red color filter 30b is the same color light emitted from the color filter 3, that is, the liquid crystal panel 2.
The red light from the 0 pixel 20b is transmitted, but the other blue light and green light are absorbed, so that from the perspective of the observer, the color filter 30 blocks the minute blue and green light emissions, and the color filter 3 The direction of progress of the minute light emission from is limited for each color.

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

FIG.

[Procedure correction 6]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

Front page continuation (72) Inventor Shin Tanase 2-5-5 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.

Claims (6)

[Claims] 1. A liquid crystal stereoscopic display device comprising a light source device that emits light in a plane and a color liquid crystal panel that forms a left-eye image and a right-eye image, wherein the light source device emits the light emission to pixels of the number of viewpoints of the stereoscopic image. A liquid crystal stereoscopic display device, characterized in that the liquid crystal stereoscopic display device is provided with a color separation unit that is provided in a predetermined order and converts into a set of minute light emission of each color of red, blue, and green. 2. A liquid crystal stereoscopic display device comprising a light source device that emits light in a plane and a black-and-white liquid crystal panel that forms a left-eye image and a right-eye image, wherein the light source device emits the light emission to pixels corresponding to the number of viewpoints of the stereoscopic image. A color separation unit that is provided for the liquid crystal panel and that is arranged in a predetermined order and converts into a set of minute light emission of each color of red, blue, and green is provided. A color filter corresponding to each color of the separating means is arranged, the traveling direction of each color is limited by the emission color on the light source side and the color filter, and the image of the liquid crystal panel is separated into left and right color information. Liquid crystal stereoscopic display device. 3. The liquid crystal stereoscopic display device according to claim 1, wherein the color separation unit is a color filter. 4. The liquid crystal stereoscopic display device according to claim 1, wherein the color separation unit is an interference filter having a color selective transmission property. 5. The liquid crystal stereoscopic display device according to claim 1, wherein the color separation means is composed of minute fluorescent surfaces of respective colors arranged in a predetermined order of the light source device. 6. The liquid crystal stereoscopic display device according to claim 1, wherein a dispersion type liquid crystal panel is arranged between the light source device and the liquid crystal panel.