JPH0743666A - Image display device - Google Patents

Abstract

(57) [Summary] [Purpose] Make two images in color in an easy-to-read state.
Display on screen. [Structure] Light from a light source is vertically polarized by a polarizing filter 1 and strikes a liquid crystal panel 2. The liquid crystal panel 2 is prepared as a pair of two liquid crystal cells for each pixel.
Each liquid crystal cell keeps vertical polarization as it is when a voltage is applied, but changes the direction of polarization to horizontal polarization when it is not applied. The polarized light passing through each cell passes through the pixel polarization filter 3 in which the vertical polarization filter and the horizontal polarization filter are paired. For the image displayed with horizontal polarization, the control unit 6 applies voltage to cells corresponding to bright spots to make horizontal polarization, and outputs to cells that are not bright spots as vertically polarized light. The reverse is done for images displayed with vertical polarization.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for displaying a plurality of images such as two images for stereoscopic viewing on one screen.

[0002]

[Prior art]

(Conventional Example 1) 1 as is conventionally seen in stereoscopic image display
As a technique for displaying a plurality of images on one screen, there is a method using three primary colors of light. This structure is shown in FIG. An image S2 of red monochromatic light and an image S3 of blue monochromatic light are simultaneously displayed on the display screen S1. When the images S1 and S2 are viewed through the red filter S4 that transmits only red and the blue filter S5 that transmits only blue, the image S4 of monochromatic red light and the image S5 of monochromatic blue light can be respectively viewed. When two types of images for which parallax is calculated are displayed as images S2 and S3 with monochromatic light, and these images are viewed with glasses having filters that pass only monochromatic light to the left and right lens parts, the images have a stereoscopic effect. You can see the image.

(Prior art example 2) There is also a technique for displaying a plurality of images by utilizing a time difference. This configuration is shown in FIG.
~ (F). Divide into frames per unit time,
Image 1 and image 2 are displayed alternately. If this display is viewed as it is, it looks like the image S8 due to the afterimage phenomenon. The shutter lens S9 has shutters on the left and right eye lens portions, respectively. Image 1 and image 2 are displayed alternately, and with the shutter lens synchronized with the display, the left-eye shutter opens at the frame of image 1 (FIG. 15E), and the right-eye shutter opens at image 2. Open (Fig. 15 (f)). The image when the shutter is open can be seen by the left and right eyes. Therefore, if two types of images for which parallax is calculated are used, an image having a stereoscopic effect can be obtained.

[0004]

In the above two conventional examples, each method has its own drawback.

Regarding Conventional Example 1: Since monochromatic light is used to display each image,
Cannot be colorized.

2: When it is desired to express as a three-dimensional image,
The difference in the colors of the images displayed on the left and right eyes has a visual effect, and it is easy to get tired.

Regarding Conventional Example 2: Since all the light is temporarily blocked by the shutter of the shutter lens unit, the visual field of the subject is temporarily blocked.
Since the shutter operates at high speed, the subject does not directly notice the occlusion of the visual field, but flicker increases and mental fatigue increases.

4: Since a cable for driving the shutter is required, there is a feeling of discomfort at the time of mounting, and since the shutter is included in the lens portion, it is inconvenient in terms of size and handling of the eyeglass device.

5: When used by a plurality of subjects at the same time,
There is a need for glasses for a number of people and a device for driving the glasses.

The present invention has been made in view of the above-mentioned conventional example, and the viewer's fatigue is small, and the device of elevation is not required,
An object of the present invention is to provide an image display device capable of color display and capable of simultaneously displaying a plurality of images.

[0011]

[Means for Solving the Problems] and

In order to achieve the above object, the image display device of the present invention has the following structure.

Input means for inputting binary image data representing a plurality of images and polarized light having a plane of polarization in a desired direction are set to 1
Generating means for generating at least the number of the plurality of images per pixel, and generating polarized light having polarization planes in mutually different predetermined directions corresponding to each image based on each image data input by the input means. And a control means for controlling the generation means.

Further, in a display device capable of simultaneously displaying two types of images by inputting two types of image information and simultaneously displaying two types of images on one screen and independently acquiring each image, Generation means for generating linearly polarized light, polarization means for controlling the polarization plane of the linearly polarized light generated by the generation means in two parts for each pixel, and transmission / cutoff of the linearly polarized light according to the direction of the polarization plane. And a means for controlling the polarization means based on the two types of image information to generate linearly polarized light whose polarization planes are orthogonal to each other for each pixel. The two previously displayed images are displayed at the same time.

[0014]

[First Embodiment] This embodiment relates to a display device using a liquid crystal shutter. Before explaining the device of the embodiment, the principle of liquid crystal is shown in FIGS. 16 and 17, and the principle of the liquid crystal shutter is shown in FIG.

Properties of Liquid Crystal FIG. 16 is a principle diagram showing the structure of liquid crystal for controlling polarization, and shows the constitution of the molecular axis of the liquid crystal. The liquid crystal cell S11 has 2
A nematic liquid crystal is sandwiched between glass plates with a thickness of about 10 μm while twisting the molecular axis of the nematic liquid crystal, and electrodes are attached to both sides. A voltage is applied to the liquid crystal cell S11 by the power source S12. In the liquid crystal cell S11, when no voltage is applied, the molecular axis remains twisted at 90 degrees (Fig. 1).
6-a), it has a property of bending the plane of polarization of transmitted light by 90 degrees along the molecular axis. When a voltage is applied, the molecular axes are aligned (Fig. 16-b), and light is transmitted as it is.

Principle of polarization control FIG. 17 shows the flow of light passing through the liquid crystal shown in FIG. The polarization filter S13 linearly polarizes natural light. The liquid crystal cell S14 is a liquid crystal cell of the same format as the cell S11 in FIG. Arrows S15 and S16 indicate the loci of light emitted from the light source. The light emitted from the light source is the polarization filter S
It becomes linearly polarized light through 13. FIG. 17-a shows a case where no voltage is applied to the liquid crystal cell S14. When polarized light passes through the liquid crystal cell S14, the plane of polarization of light rotates along the molecular axis, and linearly polarized light having a plane of polarization orthogonal to the plane of polarization polarized by the polarization filter S13 (S15 in FIG. 17).
Becomes FIG. 17-b shows the case where a voltage is applied to the liquid crystal cell. Since the molecular axis of the liquid crystal is aligned in the same direction as the optical path by the voltage pressurization, the polarized light passes through the liquid crystal cell S14 as it is and is linearly polarized at the same angle as the plane of polarization polarized by the polarization filter S13 (S16 in FIG. 17). Becomes By thus controlling the voltage of the liquid crystal cell, the plane of polarization of the linearly polarized light can be changed.

Principle of Liquid Crystal Shutter FIG. 18 shows the principle of the liquid crystal shutter. A polarization filter (analyzer) S17 is arranged in the crossed Nicols on the rear part of the liquid crystal.
The linearly polarized light transmitted through the polarization filter S13 and the liquid crystal cell S14 has its polarization plane angle changed by the liquid crystal cell S14, as shown in FIG. As a result, when no voltage is applied, the polarization plane angle is changed by the liquid crystal, and the polarization has the same polarization plane angle as the polarization transmission angle of the analyzer S17, so that the light passes through the analyzer S17 (FIG. 18-a). When a voltage is applied to the liquid crystal cell S14, the linearly polarized light is transmitted as it is, and the polarized light has a polarization plane angle orthogonal to the polarization transmission angle of the analyzer S17, and thus is blocked (FIG. 18-b). By this method,
A liquid crystal shutter is configured that transmits light when no voltage is applied to the liquid crystal and blocks light when voltage is applied. By disposing the analyzer in parallel Nicols, it is possible to block light when no voltage is applied and to transmit light when a voltage is applied.

[Structure of Display Device] FIG. 1 is a view best showing the features of the present invention. In the figure, the polarization filter 1 linearly polarizes natural light. The liquid crystal panel 2 is capable of controlling the plane of polarization for each pixel, and one liquid crystal cell is configured as one pixel (hereinafter referred to as a cell pair), and the pixels are arranged in 3 × 3. Polarizing filter 3
Is a pixel polarization filter for transmitting the polarized light after passing through the liquid crystal panel 2. This is composed of two types of polarization filters in which, for each pixel, the portions corresponding to the paired liquid crystal cells are orthogonal to each other. The liquid crystal panel 2 and the pixel polarization filter 3 are sufficiently close to each other, and the light transmitted through each liquid crystal cell in the liquid crystal panel 2 does not transmit except the corresponding spots in the pixel polarization filter 3. The visual polarization filters 4 and 5 block one of the two types of polarized light. The control device 6 controls the two types of image data and the liquid crystal panel 2. The control device 6 acquires two types of images, converts them into binary image data by the liquid crystal image data creation units 61 and 62, and inverts the image data of the second image by the data information inversion unit 63, The image synthesizing unit 64 synthesizes binary image data for each pixel to generate synthetic image data (hereinafter, pixel map), and the liquid crystal cell control unit 65 controls the liquid crystal panel 2 based on the pixel map to synthesize the image. Display an image.

Two types of polarization control for one pixel The configuration of one pixel in the device of FIG. 1 is shown in FIG.
Shown in. In the figure, liquid crystal cells 11 and 12 are liquid crystal cells for controlling the polarization plane of polarized light of one pixel, and correspond to the cells 21 to 27 in FIG. The liquid crystal cell is driven by power supplies 13 and 14. The polarization filter (analyzer) 15 for determining the polarization plane of the liquid crystal cell is the pixel polarization filter 3
1 pixel of (FIG. 1) is shown. The polarizer on the left side of the analyzer 15 is arranged in parallel Nicols, and has a polarization plane at the same angle as the polarization plane of the polarization transmitted through the polarization filter 1 (hereinafter, the polarization plane is a vertical polarization in the drawing. Vertical polarization). The right side of the analyzer is arranged in a crossed Nicols, and passes polarized light (hereinafter, referred to as horizontal polarized light) having an angle orthogonal to the polarization plane of the polarized light transmitted through the polarization filter 1.

Table 1 shows the process of transmitting the light of one pixel. In the table, the polarizer corresponds to the polarization filter 1, and the analyzer corresponds to the polarization filter 15. The upper section separated by the dotted line corresponds to the liquid crystal cell 11 corresponding to the image light 1, and the lower section corresponds to the liquid crystal cell 12 corresponding to the image light 2.

[0021]

[Table 1] The points shown in the table will be described in order.

-Type (Fig. 2-b) When a voltage is applied to the liquid crystal cells 11 and 12, the light of the image 1 is vertically polarized by the polarization filter 1 and is transmitted through the liquid crystal cell 11 as it is, from the left side of the pixel polarization filter 15. Output vertically polarized light. Similarly, the vertically polarized light of the image 2 transmitted through the polarization filter 1 is transmitted through the liquid crystal cell 12 as it is and is blocked by the pixel polarization filter 15. Therefore, only the image 1 (vertically polarized light) is output.

-Type (FIG. 2-c) When voltage is applied only to the liquid crystal cell 11, the vertically polarized light of the image 1 transmitted through the polarization filter 1 is transmitted through the liquid crystal cell 11 as it is and vertically polarized from the left side of the pixel polarization filter 15. Output as is. The vertically polarized light of the image 2 that has passed through the polarization filter 1 bends the plane of polarization at a right angle when it passes through the liquid crystal cell 12 to become horizontally polarized light, and passes through the right side of the pixel polarization filter 15 as it is. Therefore, the image 1 (vertically polarized light) and the image 2 (horizontal polarized light) are output.

-Type (Fig. 2-d) When voltage is applied only to the liquid crystal cell 12, the vertically polarized light of the image 1 transmitted through the polarization filter 1 becomes horizontal polarized light with the plane of polarization bent at a right angle when transmitted through the liquid crystal cell 11. , And is blocked by the pixel polarization filter 15. The vertically polarized light of the image 2 that has passed through the polarization filter 1 passes through the liquid crystal cell 12 as it is and is blocked by the pixel polarization filter 15. Therefore, the image is not output.

-Type (Fig. 2-e) If no voltage is applied to both liquid crystal cells, the vertically polarized light of the images 1 and 2 transmitted through the polarization filter 1 has a plane of polarization at right angles when transmitted through both liquid crystal cells 11 and 12. Bend it to horizontal polarization. The horizontal polarization of the image 1 is blocked by the pixel polarization filter 15. Image 2 light is horizontally polarized and pixel polarized filter 1
The right side of 5 is transmitted. Therefore, the horizontally polarized light of the image 2 is output.

Display Method FIG. 3 shows conversion of a pixel map when an image is combined. In this embodiment, for the sake of clarity, a monochrome image of 3 × 3 dots is illustrated. FIG. 3-a is image 1.
FIG. 3-b is image 2. Bitmaps of these images are shown in FIGS. 3-c and 3-d. 1 indicates a colored portion.

A pixel map obtained by synthesizing these two types of images is shown in FIG. The dot information is 1 for a dot displaying only image 1, 2 for a dot displaying only image 2, 3 for a dot displaying both images, and 0 for a dot not displaying both images. Have information.

The liquid crystal panel control device 6 applies a voltage to both liquid crystal cells of a pixel corresponding to a dot having a value of 1 in the pixel map of FIG. For a pixel corresponding to a dot with a value of 2, no voltage is applied to both liquid crystal cells. For the pixel corresponding to the dot having a value of 3, the voltage is applied to the liquid crystal cell on the left side (on the side where the pixel polarization filters are arranged in parallel Nicols, which corresponds to the cell 11 in FIG. 2; hereinafter, referred to as liquid crystal cell L). In addition, no voltage is applied to the liquid crystal cell on the right side (the side on which the pixel polarization filters are arranged in the crossed Nicols, which corresponds to the cell 12 in FIG. 2: hereinafter referred to as the liquid crystal cell R). For a pixel corresponding to a dot whose dot information is 0, the liquid crystal cell L
A voltage is applied to the liquid crystal cell R without applying a voltage to.

Correspondence between the liquid crystal panel 2 of FIG. 1 and the pixel map when the voltage is applied as described above is shown in FIG. 4-a. The cell 21L represents the liquid crystal cell L of the upper left cell pair 21 of the liquid crystal panel 2. The cell 21R is the liquid crystal cell R of the upper left cell pair 21, 22R is the liquid crystal cell L of the upper center cell pair 22, and cell 22R is the liquid crystal cell R of the upper center cell pair 22. Hereafter, the cell pair 29 up to the cell 29R is similarly dealt with. When a voltage is applied to each cell according to the pixel map as shown above, the polarization from each pixel is output as shown in FIG. 4-c. When this polarized image passes through the pixel polarization filter 3 (FIG. 4-d) of FIG. 1, it is output as polarized light in the direction shown in FIG. 4-e.
That is, as shown in Table 1, from a pixel having a dot information value of 1 in the pixel map, vertical polarization of the image 1
A pixel having a dot information value of 2 outputs horizontal polarized light of image 2, and a pixel having a dot information value of 3 outputs vertical polarized light of image 1 and horizontal polarized light of image 2. Pixels with dot information of 0 do not output light.

When the polarized output image shown in FIG. 4E is viewed through the polarizing filters for vision 4 and 5 in FIG. 1, the polarizing filter for vision 4 passes through the vertically polarized light, and therefore, FIG.
The image 1 shown in FIG. 4G is obtained as the image 1 shown in FIG.

With this method, transmission of two kinds of light from one pixel can be controlled, and two kinds of images can be simultaneously displayed using two kinds of linearly polarized light from a screen in which the pixels are two-dimensionally arranged.

According to the above image display device, two kinds of images can be displayed on one screen, and each image is linearly polarized light in different directions. Therefore, if a polarizing filter is used, only a desired image is selectively selected. Can be visualized. Thus, only a polarizing filter is needed for selective visualization of the image. In addition, it is possible to perform processing such as changing the displayed image in pixel units. Therefore, the moving image can be stereoscopically viewed. Further, although the image is displayed in polarized light, its wavelength or the like can be set to a desired value, so that there is no discomfort as compared with a conventional stereoscopic device or the like.

In FIG. 1, the liquid crystal cells in one pixel are aligned left and right. However, the liquid crystal cells are aligned vertically, and the polarization transmission angles of the analyzers are alternately arranged column by column or row by row. However, it is possible to configure many kinds of arrangement of the liquid crystal cell in the present invention within the scope of the present invention by performing the same polarization in the liquid crystal cell control. Similarly, the pixel map of image information can also be used in the present invention for encoding image information using various means.

[0034]

[Second Embodiment] The first embodiment is a pixel polarization filter 3
Is a method of blocking light by using. The second embodiment shows a method of controlling the light source itself to block light.

The light source 100 in FIG. 5 can be controlled pixel by pixel and emits natural light. In this embodiment, the light source 100 is composed of 3 × 3 dots, and light emission control is possible for each dot. The display control device 105 includes a pixel display control unit 103 that controls the light source 100 and a liquid crystal panel display unit 104 that controls polarization for each pixel.
The same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

Display Principle of 1 Pixel The configuration of 1 pixel is shown in FIG. One pixel 106
Is a combination of two liquid crystal cells and controls the polarization plane of polarized light for each cell, which corresponds to one pixel of the liquid crystal panel 2 in FIG. The power supply and its switch 107 are for operating the liquid crystal cell.

When a voltage is applied to both liquid crystal cells of one pixel, the polarized light transmitted through the polarization filter 101 is transmitted through both liquid crystal cells as it is, and vertical polarized light is output (FIG. 6-a).
If no voltage is applied to both liquid crystal cells, the plane of polarization is bent at a right angle when passing through both liquid crystal cells, and horizontal polarized light is output (Fig. 6).
-B). When a voltage is applied to one liquid crystal cell and no voltage is applied to the other liquid crystal cell, the polarized light transmitted through the polarization filter 101 outputs vertical polarized light and horizontal polarized light (FIG. 6-c).
When the pixel light is not generated, the light emission of the pixel of the light source 101 is stopped (FIG. 6-d).

The image composite display can be realized by controlling the respective pixels by the control device 105 to perform the above-described light emission and polarization processing in pixel units. With the same mechanism as in the first embodiment, composite image data is created from two types of image data according to the operation of one pixel, and by the control of the control device 105, according to a pixel map created based on the image,
When the value is 1, the voltage is not applied to both liquid crystal cells, when the value is 2, the voltage is applied to both liquid crystal cells, and when the value is 3, the voltage is applied to one liquid crystal cell and to the other liquid crystal cell. Does not apply voltage. In this embodiment, image 1 is through the left cell and image 2 is through the right cell. For stereoscopic viewing, which cell is to be applied with a voltage is determined in consideration of the image data and the polarizing filter for vision. When the dot value is 4,
The polarization display of each image is performed by performing the process of stopping the light emission of the light source 100. As a result, as in the first embodiment,
It is possible to display two types of images simultaneously by controlling the dot display having two types of linearly polarized light from each pixel.

According to the apparatus of this embodiment, image 1 and image 2
Since two cells are used in the pixel that displays either one of them, the light amount of the displayed image is increased, and a brighter image can be displayed as compared with the first embodiment. Moreover, the pixel polarization filter is not necessary.

[0040]

[Third Embodiment] A display device according to a third embodiment is shown in FIG. In the second embodiment, the dot display is controlled by controlling the light source, but in the present embodiment, the liquid crystal shutter is used to control the light. In FIG. 7, the light emitted from the light source passes through the liquid crystal shutter polarization filter 201, becomes polarized light, and is transmitted or blocked for each pixel by the liquid crystal shutter 202.
One liquid crystal cell corresponds to one pixel. The polarization filter 1 is arranged in a vertical Nicol with the polarization filter 1.

The image synthesis and display control unit 204 is a pixel display control unit 203 for controlling light emission / blocking of a light source.
including. The same components as those in the first or second embodiment are designated by the same reference numerals and the description thereof will be omitted.

The principle of the liquid crystal shutter is the first embodiment and FIG.
As shown in 8. By this liquid crystal shutter, when the horizontally polarized light that has passed through the polarization filter 201 passes through the liquid crystal cell to which no voltage is applied, only that dot emits vertically polarized light. As a liquid crystal shutter, there is also a method in which the polarizing filter 201 and the polarizing filter 1 are arranged in parallel Nicols and light is transmitted when a voltage is applied.

The method of cutting off the light from the light source by replacing the light source control section of the second embodiment with a liquid crystal shutter and applying a voltage to the liquid crystal shutter section of the dots which do not display both images is different from the second embodiment. The display method is the same as that in the second embodiment. The structure of one pixel is shown in FIG.
In the figure, 201 is a polarizer for a liquid crystal shutter, and 205
Is a liquid crystal for a liquid crystal shutter, and the filter 1 is a polarization filter that also serves as an analyzer for a liquid crystal shutter and a polarizer that generates linearly polarized light. The cell pair 106 has the same configuration as the cell pair 106 in FIG. 8 and corresponds to one pixel of the liquid crystal panel 2.

When only the image 1 is displayed, the voltage is not applied to the liquid crystal shutter 205, but the voltage is applied to both the display liquid crystal cell pair 106 (FIG. 8A). When only the image 2 is displayed, no voltage is applied to the liquid crystal shutter 205 and the liquid crystal cell pair 1
No voltage is applied to both 06 (FIG. 8-b). When displaying both images, no voltage is applied to the liquid crystal shutter 205, a voltage is applied to one cell of the liquid crystal cell pair 106, and no voltage is applied to the other liquid crystal cell (FIG. 8C). When both images are not displayed, a voltage is applied to the liquid crystal shutter 205 (Fig. 8-
d).

In this embodiment, as compared with the second embodiment, the light source can be operated by the liquid crystal, and the liquid crystal shutter 202 and the liquid crystal panel 2 can be easily interlocked.

[0046]

[Fourth Embodiment] As a fourth embodiment, a color apparatus of the first embodiment will be described. FIG. 9 is a diagram showing the colorization of the first embodiment, showing one pixel. The pixel controller 303 analyzes the color elements from the image data,
It drives the corresponding liquid crystal cell. The liquid crystal cell set 301 is a combination of 2 × 3 liquid crystal cells and constitutes one pixel. Similar to the first embodiment, one pixel is divided into two sets on the left and right sides to form a liquid crystal cell for vertical polarization and horizontal polarization. In order to support colorization, there are three types of liquid crystal cells for the three primary colors of light RGB. 304 from the liquid crystal cell in the upper left part of the figure,
305, 306, 307, 308, 30 in order from the upper right part
Set to 9. The color filter 302 for color display is next to the liquid crystal filter 15. The color filters are arranged in the order of red, green, and blue from the top, and only the light of each wavelength is passed. FIG. 12 shows a display device in which the pixels are arranged on a 3 × 3 screen. Reference numeral 315 is a liquid crystal panel in which the liquid crystals 301 are arranged in a 3 × 3 array. Reference numeral 316 is a color filter in which the color filters 302 are arranged in pixels.

The image 1 and the image 2 are image data for liquid crystal display by the color liquid crystal image data creating units 310 and 311 and the data of the image 2 is inverted by the inverting unit 312. These image data are combined by the image combining unit 313, and the liquid crystal cell control unit 314 controls the liquid crystal cell based on the image data.

Color 8 created by the image composition unit 313
FIG. 10 shows an example of a pixel map of a composite image in color display. Each pixel of the pixel map requires liquid crystal cells / pixel, that is, 6 bits. The upper 3 bits have dot information for image 1 in the order of red, green and blue, and the lower 3 bits have dot information for image 2 in the order of red, green and blue.

The correspondence between the map for one pixel and the liquid crystal cell is shown in FIG. The most significant bit (b5) corresponds to the upper left liquid crystal cell, the upper second bit (b4) corresponds to the left middle liquid crystal cell, and the repeating least significant bit (b0) corresponds to the lower right liquid crystal cell. A voltage is applied to the three liquid crystal cells on the left side RGB when the bit information of the pixel map is 1, and a voltage is applied to the three liquid crystal on the right side RGB when the bit information is 0 (FIG. 11B). FIG. 11B exemplifies the pixel information (100011) at the lower left of FIG. 10, and a voltage is applied to the liquid crystal cells 304 and 307 from this information. In these liquid crystal cells, vertically polarized light is transmitted as it is, and in other cells, it is emitted as horizontally polarized light. Therefore, vertically polarized light transmitted through the liquid crystal cell 304 and cells 308 and 30 are transmitted.
The horizontal polarization that has passed through 9 is the pixel polarization filter 15
Through. These two polarized lights pass through the color filter 302 and become red vertical polarized light and green and blue horizontal polarized light. This 2
Two polarizations are the light output from this pixel.

When this light is passed through the vision filter 4, red vertically polarized light can be seen, and through the vision filter 5, cyan horizontally polarized light can be seen. This way, 2 for each pixel
Different types of colors can be displayed, and two types of color images can be displayed simultaneously on one screen. When increasing the types of colors, the bit information of the pixel map is increased and the transmittance of the liquid crystal cell is set to multiple levels.

In the case of colorization, the coloring phenomenon when transmitting the liquid crystal becomes a problem, but it can be sufficiently solved by the current technology by sandwiching a compensating film or the technology of doubling the liquid crystal panel.

This colorization can also be applied to the second and third embodiments. RGB for 1 pixel of liquid crystal panel
A cell for each color may be provided and controlled in the same manner as in the first or second embodiment. FIG. 13A shows a colorized display portion of the second embodiment, and FIG. 13B shows a colorized display portion of the third embodiment.

As described above, the color image display device of the present embodiment can display a plurality of color images on one display panel field with polarized lights of different walks, and one image can be displayed by using the polarization filter. Can be visualized. Therefore, a stereoscopic view of a color image can be realized, and the image can be processed in pixel units.

In this system, as the polarization control,
Although the liquid crystal in which the molecular axis of the liquid crystal is twisted by 90 degrees is used, a similar system can be configured by a liquid crystal in which the molecular axis is twisted by 270 degrees, or other means for electrically and mechanically controlling the polarization plane of polarized light. You can get the same effect.

[0055]

As described above, the image display device of the present invention causes less fatigue to the viewer, does not require a device for raising the image, and simultaneously displays a plurality of images in color so that each image can be viewed. The effect is that it can be converted.

[0056]

[Brief description of drawings]

FIG. 1 is a configuration diagram of an image display device according to a first embodiment.

FIG. 2 is a diagram showing an operation for each pixel.

FIG. 3 is a diagram showing a configuration of a pixel map for image display.

FIG. 4 is a display diagram in which a 3 × 3 composite image and various images are polarized and extracted.

FIG. 5 is a configuration diagram showing a light source control type display device of a second embodiment.

FIG. 6 is a diagram showing an operation principle of a light source control type display device.

FIG. 7 is a configuration diagram showing a liquid crystal shutter type light source control display device of a third embodiment.

FIG. 8 is a diagram showing an operation of a pixel when a liquid crystal shutter is used.

FIG. 9 is a configuration diagram of one pixel of a color image display device according to a fourth embodiment.

FIG. 10 is a diagram showing how color images are combined.

FIG. 11 is a correspondence diagram of pixels and maps of a color image.

FIG. 12 is an overall view of a color image display device.

FIG. 13 is a panel configuration diagram of a light source control type and a liquid crystal shutter type color image display device.

FIG. 14 is a diagram showing the principle of stereoscopic vision using the three primary colors of light.

FIG. 15 is a diagram showing an example of a liquid crystal shutter type time division display.

FIG. 16 is a diagram showing the molecular axis of nematic liquid crystal.

FIG. 17 is a diagram showing a flow of polarized light passing through liquid crystal.

FIG. 18 is a diagram showing the principle of a liquid crystal shutter.

[Explanation of symbols]

1 Polarization filter for linearly polarizing light 2 Liquid crystal panel that controls the polarization plane of polarization for each pixel 3 Pixel polarization filter (analyzer) 4 Polarization filter for vision 5 that cuts certain linear polarization Polarizing filter for vision to be cut 6 Dot matrix type liquid crystal panel control device 7 Model of liquid crystal cell 8 Power supply for applying voltage to liquid crystal 11 Liquid crystal cell 12 for controlling left (first) image display in 1 pixel 12 in 1 pixel Liquid crystal cell for controlling right side (second) image display 13 Power source for applying voltage to left side (for first image) liquid crystal cell 14 Power source for applying voltage to right side (for second image) liquid crystal cell 15 1 pixel Pixel polarization filter 21 to 29 for processing polarized light Pixels arranged in a dot matrix type 21L, 21R to 29L, 29R Liquid crystal cell constituting the cell 100 Light source controllable for each pixel 101 Polarization filter for making light linearly polarized 102 Liquid crystal panel 103 for controlling polarization plane of polarization for each pixel 103 Pixel display control device 104 for controlling light source 104 Polarization plane Dot matrix type liquid crystal panel control device 105 for controlling the liquid crystal display control device 106 for controlling 103 and 104 Liquid crystal for one pixel of 102 107 Power supply and switch for controlling voltage applied to liquid crystal for one pixel 201 Polarizing filter for liquid crystal shutter 202 Liquid crystal panel that functions as liquid crystal shutter 203 Pixel display control device that controls liquid crystal shutter 204 Display control device that controls 203 and 104 301 Colored liquid crystal for one pixel 302 Color filter 303 Control liquid crystal cell for one pixel Pixe Control device 304 left side (first image) red liquid crystal cell 305 left side (first image) green liquid crystal cell 306 left side (first image) blue liquid crystal cell 307 right side (second image) red liquid crystal Cell 308 Right side (second image) liquid crystal cell for green 309 Right side (second image) liquid crystal cell for blue 310 310 Liquid crystal panel in which 301 is arranged in 3 × 3 pixels 311 Color filter in which 302 is arranged in 3 × 3 pixels

Claims (5)

[Claims] 1. Input means for inputting binary image data representing a plurality of images; generating means for generating polarized light having a plane of polarization in a desired direction by at least the number of the plurality of images per pixel; An image based on each image data input by the input unit, the control unit controlling the generation unit to generate polarization having polarization planes in different predetermined directions corresponding to each image; Display device. 2. The image display according to claim 1, wherein the generation unit includes a linearly polarized light generation unit that generates linearly polarized light in a predetermined direction and a unit that changes the direction of the plane of polarization of the linearly polarized light. apparatus. 3. The image display according to claim 2, wherein the linearly polarized light generating means has one light source for each pixel, and the control device controls blinking of the light source based on the image data. apparatus. 4. The image display device according to claim 1, wherein the plurality of images are two images having parallax. 5. A display device capable of displaying two types of image information at the same time, displaying two types of images on one screen at the same time, and acquiring each image independently, Generation means for generating linearly polarized light, polarization means for controlling the polarization plane of the linearly polarized light generated by the generation means in two parts for each pixel, and transmission / cutoff of the linearly polarized light according to the direction of the polarization plane. And a means for controlling the polarization means based on the two types of image information to generate linearly polarized light whose polarization planes are orthogonal to each other for each pixel. An image display device, which displays two types of images at the same time.