JP2008268839A - Image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To decrease manufacturing stages of an image display device used for an image display device, and to improve picture quality. <P>SOLUTION: A liquid crystal panel 150 is an active matrix type TFT liquid crystal panel having a lower polarizing plate 135, a lower glass substrate 130, a liquid crystal layer 125, an upper glass substrate 115, a CF barrier 110, and an upper polarizing plate 105. The CF barrier 110 has a light shield portion 111 and a plurality of opening portions 112. At each opening portion 112 of the CF barrier 110, a color filter 120 of one of three colors R, G, and B is disposed. Consequently, variance in layer thickness between a pixel electrode substrate and a common electrode substrate can be suppressed, and unevenness of a voltage applied to a sub-pixel can be suppressed. Further, a parallax barrier and the color filter can be formed in the same manufacturing stage, so the manufacture can be facilitated. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a technique for displaying different images in respective directions when a single screen is viewed from different directions.

  When a single image display device is viewed from different directions, image display devices that display different images in the respective directions are used. In such an image display device, each sub-pixel used for forming a different image, a color filter layer that transmits light having a predetermined wavelength out of light that has passed through the sub-pixel, and an opening and a light-shielding portion are formed. Some have a liquid crystal panel having a parallax barrier. The opening and the light shielding portion of the parallax barrier function as a barrier that divides the first sub-pixel used for forming the first image and the second sub-pixel used for forming the second image. The light from the second sub-pixel is directed in the second direction. The user can visually recognize the first image from the first viewing direction and can visually recognize the second image from the second viewing direction.

  In such an image processing apparatus, the color filter layer includes a plurality of color filter elements representing one pixel of an image and a grid-like black matrix surrounding each filter element on the electrode layer of the common electrode substrate. Patterned by lithographic method. The parallax barrier is also patterned in a stripe shape or a matrix shape on a transparent substrate by a photolithographic method. In the manufacture of the display panel of the image display device, the color filter layer and the parallax barrier are formed by different patterning.

JP-A-8-331605

  However, the conventional technique has a problem that it is inefficient because the patterning process occurs at least twice in the manufacturing process.

  Further, in the production of the color filter layer, since the composition of the filter elements of each color and the material of the black matrix are different, the thickness of the color filter layer varies. As a result, variations in image brightness due to uneven voltage values between the pixel electrode substrate and the common electrode substrate occur, and image quality deteriorates.

  The present invention has been made in view of the above-described problems, and aims to reduce the manufacturing process and improve the image quality of an image display device used in an image display device.

In order to solve at least a part of the above-described problems, the first aspect of the present invention displays an image that displays a first image in the first viewing direction and a second image in the second viewing direction. An image display device used for a display device is provided. The image display device according to the first aspect includes:
An image forming unit provided with a plurality of first subpixels used for forming the first image and a plurality of second subpixels used for forming the second image;
A light-shielding portion having a plurality of openings, and emits light from each of the first sub-pixels in the first viewing direction and emits light from each of the second sub-pixels in the second viewing direction; Injection direction regulation
And a plurality of color filter elements that are disposed in the plurality of openings and transmit light of a predetermined wavelength among light from the plurality of first subpixels and the plurality of second subpixels. To do.

  According to the image display device of the first aspect, since the filter element can be disposed in the opening of the emission direction restricting means, the color filter layer having the filter element and the emission direction restricting means need not be formed separately. Therefore, it is not necessary to align the color filter layer and the emission direction restricting means. Conventionally, one filter element is formed corresponding to each of the plurality of first subpixels and the plurality of second subpixels, whereas it corresponds to the pair of the first subpixel and the second subpixel. Thus, one filter element may be formed.

In the image display device according to the first aspect, a plurality of first subpixels used for forming the first image and a plurality of second subpixels used for forming the second image are formed on the first surface. A first substrate on which a plurality of pixel electrodes corresponding to each are formed;
An electrode layer provided facing the plurality of pixel electrodes;
A second substrate having a second surface facing the first surface and a third surface on the back side of the second surface;
An electro-optic layer interposed between the plurality of pixel electrodes and the electrode layer,
The image forming unit may include the plurality of pixel electrodes, the electrode layer, and the electro-optical layer.

  In the first aspect, the electrode layer is provided on the second surface, and the electro-optical layer is a liquid crystal layer in which liquid crystal molecules are sealed between the first substrate and the second substrate. It may be. In addition, a light source is provided, and the first and second substrates have translucency, and the first and second images are formed by modulating light from the light source by the liquid crystal layer. It may be formed.

  According to the first aspect, it is possible to suppress variation in the layer thickness between the first substrate and the second substrate. In addition, according to the image display device of the first aspect, since the constituent elements are few as compared with the case where the emission direction regulating means, the color filter, and the electrode layer are laminated in this order on the second substrate shape, the electrode The layer thickness unevenness of the layer can be reduced. Therefore, unevenness in voltage applied to the subpixels including the first substrate, the second substrate, and the liquid crystal layer can be suppressed, and the image quality can be improved.

  In the image display device according to the first aspect, the emission direction restricting means may be disposed between the electrode layer and the second substrate.

  According to the first aspect, when the emission direction restricting means and the color filter are arranged in the image forming portion, the color filter can be provided in the opening of the emission direction restricting means. Can be suppressed. Further, since the color filter is disposed in the opening, the step between the emission direction restricting means and the color filter can be easily suppressed.

In the image display device according to the first aspect,
Each of the first subpixels and each of the second subpixels is associated with a filter element of any one of the plurality of colors,
Among the plurality of first sub-pixels, a first sub-pixel group configured by the first sub-pixels arranged close to each other and corresponding to the filter elements of different colors is the first image. Represents one pixel of
Among the plurality of second sub-pixels, a second sub-pixel group configured by the second sub-pixels arranged in close proximity and corresponding to the filter elements of different colors is the second image. May represent one pixel.

  According to the image display device of the first aspect, since one pixel of the first image and the second image is represented by a plurality of subpixels arranged close to each other, the color reproducibility of the display image is improved. it can.

In the image display device according to the first aspect,
In the first substrate, the pixel electrodes corresponding to the plurality of first subpixels and the plurality of second subpixels are alternately formed in a row direction and a column direction, respectively.
The emission direction restricting means may have a matrix structure in which the light shielding portions and the openings are alternately formed in a row direction and a column direction of the pixel electrode array. Here, the light-shielding portion provided between the plurality of openings may be provided in the same size as one subpixel.

  According to the image display device of the first aspect, a user who observes the first image and the second image displayed by the image display device is in the row and column directions of the pixel electrode array, that is, the pixel electrode substrate. Thus, the first image and the second image can be visually recognized separately even when moving in the horizontal direction and the vertical direction.

In the image display device according to the first aspect,
The color filter is arranged so that the filter elements of each color are arranged in a predetermined order for each column in the row direction of the arrangement of the pixel electrodes, and the filter elements of the same color are arranged shifted by one row and one column. It may be arranged.

  According to the image display device of the first aspect, each pixel for representing the first image and the second image is configured to be shifted by one sub-pixel. Therefore, the distance between adjacent pixels is shorter than that of an image display device in which a plurality of pixels are configured in a grid pattern. Therefore, it is possible to improve the image quality in a pseudo manner with the same resolution.

In the image display device according to the first aspect,
The color filters are arranged so that the filter elements of the respective colors are arranged in a predetermined order in the row direction of the pixel electrode arrangement, and the filter elements of the same color are arranged in the column direction of the pixel electrode arrangement. It may be.

  According to the image display device of the first aspect, the distance between the sub-pixels corresponding to each color in one pixel can be reduced compared to other pixel arrangement aspects. Therefore, color reproducibility can be improved and image quality can be improved.

In the image display device according to the first aspect,
In the first substrate, the plurality of pixel electrodes corresponding to each of the plurality of first subpixels and the plurality of second subpixels are alternately formed in a row direction,
The emission direction restricting means may have a vertical stripe structure in which the light shielding portions and the openings are alternately formed in the row direction of the array of the plurality of pixel electrodes. Here, the light-shielding portion provided between the plurality of openings may be provided in the same size as one subpixel.

  According to the first aspect, the user who observes the first image and the second image displayed by the image display device moves in the row direction of the pixel electrode array, that is, in the horizontal direction with respect to the pixel electrode substrate. Thus, the first image and the second image can be viewed separately. Moreover, according to the 1st aspect, since an injection direction control means can be manufactured easily, manufacturing load can be reduced.

In the image display device according to the first aspect,
In the color filter, the filter elements of each color are arranged in a predetermined order in the row direction of the array of the plurality of pixel electrodes, and the filter elements of the same color are arranged in the column direction of the array of the plurality of pixel electrodes. It may be arranged as follows.

  According to the image display device of the first aspect, since the light-shielding portions and the filter elements of each color can be formed alternately in the column direction, color mixing and uneven distribution of each color can be easily performed in the manufacturing process. Can be suppressed. Therefore, the CF barrier can be easily manufactured.

In the image display device according to the first aspect,
The color filter is arranged so that the filter elements of each color are arranged in a predetermined order in the column direction of the pixel electrode array, and the filter elements of the same color are arranged in the row direction of the pixel electrode array. May be.

  According to the image display device of the first aspect, since the color filters can be arranged so that the filter elements of the respective colors are arranged in the row direction, an image in which a series of subpixels continuous in the column direction (horizontal direction) is one pixel. Compared to the above, the image quality can be improved in a pseudo manner.

In the image display device according to the first aspect,
A resin layer may be provided between the injection direction restricting means and the electrode layer.

  According to the image display device of the first aspect, the surface of the resin layer that is flatter than the surface of the injection direction regulating means can be formed on the electrode layer, and the thickness unevenness of the electrode layer can be reduced. In addition, the resin layer makes it easy to control the distance between the image forming unit and the injection direction restricting unit.

  In the present invention, the various aspects described above may be appropriately combined or a part thereof may be omitted.

A. First embodiment:
A1. System overview:
A schematic configuration of the image display apparatus according to the first embodiment will be described with reference to FIGS. FIG. 1 is an explanatory diagram illustrating a schematic configuration of the image display apparatus according to the first embodiment. FIG. 2 is a cross-sectional view of the liquid crystal panel in the first embodiment. As shown in FIG. 1, the image display device 100 includes a liquid crystal panel driving unit 104, a backlight 140 as a light source, and a liquid crystal panel 150. The image display apparatus 100 according to the first embodiment has the above-described configuration, and displays different first and second images in different viewing directions (viewing direction α and viewing direction β). In the first embodiment, image data for displaying the first image (hereinafter referred to as first image data in this specification) and image data for displaying the second image (hereinafter referred to as second in this specification). (Referred to as image data) is RGB image data composed of three colors of red (R), green (G), and blue (B).

  The liquid crystal panel driving unit 104 supplies a driving signal to the lower glass substrate 130 based on the input first image data and second image data.

  The liquid crystal panel 150 will be described. As shown in FIGS. 1 and 2, the liquid crystal panel 150 includes a lower polarizing plate 135, a lower glass substrate 130, a liquid crystal layer 125, an upper glass substrate 115, a parallax barrier 110 with a color filter, and an upper polarizing plate 105 in this order. This is an active matrix type TFT liquid crystal panel having a laminated structure. The liquid crystal panel 150 includes a plurality of subpixels used for image formation.

  As shown in FIG. 2, the lower glass substrate 130 is disposed on the lower polarizing plate 135, and drives the pixel electrode 132 and the pixel electrode 132 for forming subpixels on the transparent glass substrate 131 that transmits light. A thin film transistor (TFT) (not shown) is provided for each subpixel. The upper glass substrate 115 is disposed at a predetermined interval from the lower glass substrate 130, and includes a common electrode layer 117 on the surface of the transparent glass substrate 116 that transmits light on the lower glass substrate 130 side. A liquid crystal layer 125 in which liquid crystal molecules are sealed is formed between the lower glass substrate 130 and the upper glass substrate 115. In the liquid crystal layer 125, the arrangement of liquid crystal molecules changes in accordance with the drive signal supplied from the liquid crystal panel drive unit 104. Each sub-pixel includes a pixel electrode 132, a TFT, a region of the common electrode layer 117 facing each pixel electrode 132, and a region composed of liquid crystal molecules sandwiched between the pixel electrode 132 and the region facing each other.

  The parallax barrier 110 with a color filter is disposed between the upper polarizing plate 105 and the upper glass substrate 115, and the transparent glass substrate 200 that transmits light is made of black resin on the surface facing the upper glass substrate 115. The formed light shielding portion 111 and the plurality of openings 112 have a matrix structure in which the subpixels are alternately formed in the row direction and the column direction. Further, each of the openings 112 of the parallax barrier 110 with a color filter has a color filter 120R (red filter), 120G (green filter), 120B (blue filter) of any one of the three colors R, G, and B. ) Is arranged. Hereinafter, in the embodiment, the parallax barrier 110 with the color filter is referred to as a CF barrier 110. The CF barrier 110 functions as an emission direction restricting unit that restricts the light emitted from each pixel to a predetermined emission angle, and has a filter function of transmitting only light having a predetermined wavelength among the light passing through the opening 112. Have.

  Light emitted from the backlight 140 passes through the lower polarizing plate 135 and the lower glass substrate 130, is modulated in the liquid crystal layer 125, and is R, G, B in the color filter 120 disposed in the opening 112 of the CF barrier 110. Converted into light. The converted light is emitted to the outside of the liquid crystal panel 150 through the upper glass substrate 115 and the upper polarizing plate 105.

  The image display apparatus 100 according to the first embodiment has the above-described configuration, so that an observer who observes the liquid crystal panel 150 can visually recognize the first image from the first viewing direction (viewing direction α). The first image and the second image can be displayed so that the second image can be viewed from the second viewing direction (viewing direction β).

A2. Production process of CF barrier:
FIG. 3 is an explanatory diagram for referring to the manufacturing process of the CF barrier 110 in the first embodiment. The CF barrier 110 is formed by applying a black resin (photoresist) that chemically reacts and changes in response to light in a matrix on the surface of the transparent glass substrate 200 that faces the upper glass substrate 115 by a photolithographic method. (FIG. 3A). Next, the photoresist of each color is apply | coated in each opening part 112 for every color by the photolithographic method. For example, the photoresist of the R filter element 120R is applied (FIG. 3B), the photoresist of the G filter element 120G is applied (FIG. 3C), and finally the B filter element is applied. 120B of photoresist is applied (FIG. 3D). The CF barrier 110 is manufactured in this way. Note that the photolithographic method is merely an example, and the CF barrier 110 may be formed by other various methods.

A3. About color filter placement:
FIG. 4 is an explanatory diagram for explaining the arrangement of the color filters in the first embodiment. In FIG. 4, the pixel table 70 schematically shows the arrangement of sub-pixels of the liquid crystal panel 150. The liquid crystal panel 150 includes a first subpixel used for forming the first image and a second subpixel used for forming the second image. In FIG. 4, the first subpixel is indicated by white and the second subpixel is indicated by hatching. In the liquid crystal panel 150, as shown in FIG. 4, the first subpixel and the second subpixel are alternately formed in the row direction and the column direction. That is, the first subpixel and the second subpixel are formed in a matrix. Hereinafter, in the embodiments, the row direction of the subpixel array is also referred to as the X direction, and the column direction of the subpixel array is also referred to as the Y direction.

  In the CF barrier 110, R, G, and B color filters are arranged in association with each sub-pixel. Hereinafter, the color filter associated with each sub-pixel is referred to as a “filter element”. In the first embodiment, light passing through each first subpixel and each second subpixel arranged adjacent to each other in the X direction passes through the same opening. Therefore, filter elements of the same color are associated with the first subpixel and the second subpixel arranged adjacent to the first subpixel. For example, since light that has passed through the first subpixel 300 and the second subpixel 301 adjacent to the first subpixel 300 passes through the opening 112a, the R filter element 120R disposed in the opening 112a corresponds to the light. It is attached. Hereinafter, in the embodiment, the subpixels associated with the filter elements of the respective colors are also referred to as [any one of R, G, and B] subpixels. For example, the first subpixel 300 associated with the R filter element is referred to as a first R subpixel 300, and the second subpixel 301 associated with the R filter element is also referred to as a second R subpixel 301. In the image display device 100, the six sub-pixels 300 to 305 arranged continuously in the X direction correspond to the display pixels 20, 21, and 22 for representing the first image and the second image.

  As shown in the pixel table 70 in FIG. 4, among the subpixels included in each pixel, the subpixels associated with the same color filter element are shifted by one subpixel in the X direction and the Y direction, respectively. Therefore, the distance between the two subpixels associated with the filter element of the same color is the same as that when the subpixels associated with the filter element of the same color are arranged continuously in the Y direction. It is shorter than the distance between two subpixels. The distance between the two subpixels of the first R subpixel 300 of the pixel 21 and the first R subpixel 300 of the pixel 22 will be described as an example. The distance between two subpixels of the first R subpixel 300 of the pixel 21 and the first R subpixel 300 of the pixel 22 is D1. On the other hand, when the first R sub-pixel 300 is arranged at the position of the first B sub-pixel 304 of the pixel 22, the first R sub-pixel 300 of the pixel 21 and the first B sub-pixel 300 of the pixel 22 (first B sub-pixel 304). The distance between the two subpixels is D2. As is apparent from the figure, D1 is shorter than D2. In the image displayed using the pixels configured in this way, the boundary between the pixels is smoothly displayed.

A4. About the directional display method of the image display device:
A directional display method of the image display apparatus 100 will be described. FIG. 5 is a schematic diagram for explaining the directivity display method of the image display apparatus according to the first embodiment. The center line Cl in FIG. 5 corresponds to the center line of the liquid crystal panel 150 in the X direction. In FIG. 5, the description of the upper polarizing plate 105 is omitted to simplify the drawing. In this specification, the light emitted from the backlight and transmitted to the user side through the subpixel and the color filter 120 is also referred to as “emitted light from the subpixel”. For example, the light emitted from the first R subpixel 300 is transmitted from the backlight and transmitted through the first subpixel 300 used for forming the first image and the filter element (R) of the color filter to the user side, Also called.

  In the image display device 100, the light emitted from each subpixel passes through the color filter formed in the opening 112 when passing through the corresponding opening 112 of the CF barrier 110. For example, as shown in FIG. 5, among the light emitted from the first G subpixel 304, the light that passes through the opening 112b associated with the first G subpixel 302 passes through the opening 112b when the light passes through the opening 112b. , And reaches the user in the first image visual field range ar1, and the remaining light is absorbed by the light shielding portions 111 and 111. Similarly. The light passing through the opening 112b associated with the second G subpixel 303 passes through the G filter element when passing through the opening 112b, and reaches the user in the second image visual field range ar2. Therefore, the user who is in the first image visual field range ar1 can visually recognize the first image, and the user who is in the second image visual field range ar2 can visually recognize the second image.

  With such a configuration, the image display device 100 displays the first image in the viewing direction α and the second image in the viewing direction β.

  According to the image display apparatus of the first embodiment described above, since the color filter can be disposed in the opening of the emission direction regulating means, it is not necessary to form a color filter between the pixel electrode substrate and the common electrode substrate. Therefore, variation in the layer thickness between the pixel electrode substrate and the common electrode substrate can be suppressed, and unevenness of the voltage applied to the subpixel can be suppressed. Therefore, the brightness of the entire image can be flattened, and the image quality can be improved.

  Further, according to the image display apparatus of the first embodiment, among the sub-pixels included in each pixel, the sub-pixels associated with the same color filter element are shifted by one sub-pixel in the X direction and the Y direction, respectively. be able to. Therefore, the distance between the two subpixels associated with the filter element of the same color is the two subpixels when the subpixels associated with the filter element of the same color are arranged in the Y direction. It can be shorter than the distance between. Therefore, the boundary between pixels can be shown smoothly to the user who visually recognizes the image, and the image quality can be improved in a pseudo manner with the same resolution.

  In the manufacturing process of the image display device according to the first embodiment, the light-shielding portion and the color filter are formed on the same substrate by using a photolithographic method. Therefore, the process for forming the color filter (photolithograph) and the process for forming the light shielding portion (photolithograph) can be performed together in one process, and the manufacturing process can be reduced. In addition, when individually manufacturing color filters, a grid-like black matrix surrounding each filter element may be formed to improve contrast, but the CF barrier 110 of the first embodiment is a filter element. Since the black light shielding portion is provided around the periphery, the contrast can be improved without forming a black matrix.

B. Second embodiment:
In the second embodiment, a liquid crystal panel using a CF barrier in which three color filters are arranged in a substantially triangular shape will be described. In the second embodiment, since the configuration is the same as that of the CF barrier 110 except for the arrangement of the color filters, description thereof is omitted.

B1. About color filter placement:
FIG. 6 is an explanatory diagram for explaining the arrangement of color filters in the second embodiment. In FIG. 6, the pixel table 71 schematically shows the arrangement of the first subpixel and the second subpixel of the liquid crystal panel 150. In FIG. 6, the first subpixel is indicated by white, and the second subpixel is indicated by hatching.

  As shown in FIG. 6, in the CF barrier 210, filter elements of the same color are repeatedly arranged in the Y direction, and the color filters of each color are repeated in a predetermined order for each column. Has been placed. By arranging the color filters in this way, the filter elements of the respective colors are arranged close to a triangular shape.

  When the CD barrier of the second embodiment is used, a group of 2 × 3 subpixels is defined as one pixel used for displaying the first image and the second image. Specifically, as shown in the pixel table 71 of FIG. 6, the first R subpixel 300, the second R subpixel 301, the first G subpixel 302, the second G subpixel 303, the firstB subpixel 304, and the secondB subpixel. A group of sub-pixels 305 corresponds to one pixel 30 for displaying the first image and the second image, and the sub-pixels used for forming each image are arranged in a triangular shape.

  According to the image display device of the second embodiment, the first R subpixel, the first G subpixel, and the firstB subpixel for representing one pixel of the first image are arranged in a substantially triangular shape. Compared to the pixel array, for example, the sub-pixel array of the first embodiment, the distance between the sub-pixels in one pixel is closer. Therefore, color reproducibility can be improved and image quality can be improved.

C. Third embodiment:
In the third embodiment, a liquid crystal panel using a CF barrier in which light shielding portions are formed in a vertical stripe shape will be described. Since the third embodiment is the same as the first embodiment except for the sub-pixel arrangement of the liquid crystal panel and the CF barrier structure, the description thereof will be omitted.

C1. About color filter placement:
FIG. 7 is an explanatory diagram for explaining the arrangement of color filters in the third embodiment. In FIG. 7, the pixel table 72 schematically shows the arrangement of the first subpixel and the second subpixel of the liquid crystal panel of the third embodiment. In FIG. 7, the first subpixel is indicated by white and the second subpixel is indicated by hatching. In the liquid crystal panel of the third embodiment, the first subpixel and the second subpixel are alternately formed in the X direction, and the subpixels used for forming the same image are arranged in the Y direction. Is formed. That is, the first subpixel and the second subpixel are formed in a vertical stripe shape.

  As shown in FIG. 7, in the CF barrier 310, filter elements of the same color are arranged so as to repeat in the Y direction, and filter elements of each color are repeatedly arranged in a predetermined order in the X direction.

  Each sub-pixel is associated with a filter element of any one of a plurality of color filter elements. For example, since the light that has passed through the first subpixel 300 and the second subpixel 301 adjacent to the first subpixel 300 passes through the opening 112a, the first subpixel 300 and the second subpixel 301 have R light. A filter element 120R is associated. In the image display apparatus according to the third embodiment, the six sub-pixels 300 to 305 arranged continuously in the X direction correspond to one pixel 40 for displaying the first image and the second image.

  According to the image display apparatus of the third embodiment, since the CF barrier 110 is formed so that the light shielding portions and the filter elements of each color are alternately arranged in the row direction, color mixing and distribution of each color are performed in the manufacturing process. Unevenness can be suppressed. Therefore, the CF barrier can be easily manufactured.

D. Fourth embodiment:
In the fourth embodiment, a liquid crystal panel using a CF barrier in which light shielding portions are formed in a vertical stripe shape will be described. The fourth embodiment is the same as the third embodiment except for the arrangement of the CF barrier filter elements.

D1. About color filter placement:
FIG. 8 is an explanatory diagram for explaining the arrangement of color filters in the fourth embodiment. In FIG. 8, a pixel table 73 schematically shows the arrangement of the first subpixel and the second subpixel of the liquid crystal panel of the third embodiment. In FIG. 8, the first subpixel is indicated by white and the second subpixel is indicated by hatching. In the liquid crystal panel of the third embodiment, the first subpixel and the second subpixel are alternately formed in the X direction, and the subpixels used for forming the same image are arranged in the Y direction. Is formed. That is, the first subpixel and the second subpixel are formed in a vertical stripe shape.

  As shown in FIG. 8, in the CF barrier 410, the filter elements of the same color are arranged in the same row, and the filter elements of each color are arranged in the same column repeatedly in a predetermined order.

  Each sub-pixel is associated with a filter element of any one of a plurality of color filter elements. For example, since the light that has passed through the first subpixel 300 and the second subpixel 301 adjacent to the first subpixel 300 passes through the opening 112a, the first subpixel 300 and the second subpixel 301 have R light. A filter element 120R is associated. In the image display apparatus according to the fourth embodiment, the first image and the second image are displayed with a group of pixels of 3 rows × 2 columns as one pixel. Specifically, as shown in the pixel table 73 of FIG. 8, the first R subpixel 300, the second R subpixel 301, the first G subpixel 302, the second G subpixel 303, the firstB subpixel 304, and the secondB subpixel. A sub-pixel group consisting of 305 corresponds to one pixel 50 for displaying the first image and the second image.

  It is said that the human eye has high resolution in the vertical direction because it is parallel to the row direction, that is, the horizontal direction. Therefore, when the filter elements of the same color are continuously arranged in the horizontal direction as in the CF barrier 410 of the fourth embodiment, the filter elements of the same color are continuously arranged in the vertical direction. In comparison, it is difficult for human eyes to distinguish the boundary between the black color of the light shielding portion and the filter element of the same color. Therefore, according to the liquid crystal panel of the fourth embodiment, the image quality of the displayed image can be improved in a pseudo manner with the same resolution.

E. Example 5:
In the fifth embodiment, a CF barrier module in which a thick transparent resin is disposed on the liquid crystal layer side of the CF barrier will be described.

E1. Detailed configuration of CF barrier module:
FIG. 9 is a cross-sectional view illustrating the configuration of the liquid crystal panel 150a in the fifth embodiment. The liquid crystal panel 150a is an active matrix TFT liquid crystal panel having a configuration in which a lower polarizing plate 135, a lower glass substrate 130, a liquid crystal layer 125, a CF barrier module 500, and an upper polarizing plate 105 are stacked in this order. In the fifth embodiment, components represented by the same reference numerals as in the first embodiment have the same structure and function.

  The CF barrier module 500 is disposed between the upper polarizing plate 105 and the liquid crystal layer 125, and is disposed in an opening 212 formed between the transparent glass substrate 200, the light shielding part 211, and the light shielding part. The color filter 250, the light shielding part 211, and a thick film transparent resin 515 disposed on the color filter 250 are provided. A common electrode is formed on the surface of the thick transparent resin 515 facing the liquid crystal layer 125.

  A method for manufacturing the CF barrier module 500 will be described. First, the light shielding part 211 and the color filter 250 are formed on the transparent glass substrate 200 by a photolithographic method. Next, a thick transparent resin 515 is formed on the light shielding part 211 and the color filter 250 formed on the transparent glass substrate 200. For example, a sputtering method may be used for forming the thick transparent resin 515. A common electrode layer is formed on the surface of the thick transparent resin 515 facing the liquid crystal layer. That is, the CF barrier and the common electrode substrate are integrally formed.

  According to the liquid crystal panel of the fifth embodiment, since the surface of the thick film transparent resin that is flattened than the surface of the CF barrier can be disposed on the liquid crystal layer, the layer thickness unevenness of the liquid crystal layer can be reduced. Further, since the common electrode substrate can be manufactured by forming a transparent resin in the CF barrier module manufacturing process, the manufacturing process of the liquid crystal panel can be reduced. In addition, since the CF barrier and the common electrode substrate are integrally formed, the assembly with other components can be performed smoothly, and the manufacturing load can be reduced.

F. Example 6:
F1. System overview:
A schematic configuration of the image display apparatus according to the sixth embodiment will be described with reference to FIGS. 10 and 11. FIG. 11 is an explanatory diagram illustrating a schematic configuration of the image display apparatus according to the sixth embodiment. FIG. 11 is a cross-sectional view of the liquid crystal panel in the sixth embodiment. 10 and 11, the same reference numerals as those in FIGS. 1 and 2 of the first embodiment represent the same components.

  As shown in FIG. 10, the image display device 100b of the sixth embodiment has the same configuration as the image display device 100 of the first embodiment, except that the configuration of the liquid crystal panel 150b is different.

  Details of the liquid crystal panel 150b will be described. The liquid crystal panel 150b has the same configuration as the liquid crystal panel 150 of the first embodiment except that the structure of the upper glass substrate 115b is different.

  As shown in FIG. 11, the upper glass substrate 115 b is disposed at a predetermined interval from the lower glass substrate 130, and is disposed adjacent to the transparent glass substrate 116 that transmits light and the lower glass substrate 130. A parallax barrier 110 with a color filter disposed between the common electrode layer 117 and the transparent glass substrate 116 and the common electrode layer 117 is provided.

  As described in the first embodiment, the CF barrier 110 includes a light shielding portion 111 formed of a black resin on a surface of the transparent glass substrate 200 that transmits light and facing the upper glass substrate 115, and a plurality of openings. 112 has a matrix structure in which the subpixels are alternately formed in the row direction and the column direction. Further, each of the openings 112 of the CF barrier 110 is provided with a color filter 120R (red filter), 120G (green filter), 120B (blue filter) of any one of the three colors R, G, and B. ing. Various arrangements described above can be applied to the color filter of the CF barrier 110. The CF barrier 110 functions as an emission direction restricting unit that restricts the light emitted from each pixel to a predetermined emission angle, and has a filter function of transmitting only light having a predetermined wavelength among the light passing through the opening 112. Have. Note that a planarization layer formed using, for example, a resin is preferably provided between the CF barrier 110 and the common electrode layer 117.

  A liquid crystal layer 125 in which liquid crystal molecules are sealed is formed between the lower glass substrate 130 and the upper glass substrate 115. In the liquid crystal layer 125, the arrangement of liquid crystal molecules changes in accordance with the drive signal supplied from the liquid crystal panel drive unit 104. Each sub-pixel includes a pixel electrode 132, a TFT, a region of the common electrode layer 117 facing each pixel electrode 132, and a region composed of liquid crystal molecules sandwiched between the pixel electrode 132 and the region facing each other.

  The light emitted from the backlight 140 is modulated in the liquid crystal layer 125 through the lower polarizing plate 135 and the lower glass substrate 130, and R, G in the color filter 120 of the CF barrier 110 installed in the upper glass substrate 115b. , B light. The converted light is emitted to the outside of the liquid crystal panel 150 through the transparent glass substrate 116 and the upper polarizing plate 105.

  According to the image display device 100b of the sixth embodiment, when the parallax barrier and the color filter are disposed between the opposing substrates, the color filter is provided in the opening of the parallax barrier, and thus the thickness of the liquid crystal layer ( The uneven thickness of the liquid crystal gap) can be suppressed. Further, since only the irregularities corresponding to the opening and the light shielding portion of the parallax barrier are generated, the light in the pixel can be made substantially uniform. In addition, since the color filter is disposed in the opening, a step between the parallax barrier and the color filter can be easily suppressed.

  In addition, since the image display device 100b according to the sixth embodiment can arrange the pixel electrode and the CF barrier close to each other, the viewing angles in the first viewing direction and the second viewing direction can be widened. Therefore, a two-screen display can be easily provided.

G. Variation:
(1) In the first to fourth embodiments, the arrangement of various filters has been described. However, the present invention is not limited to the above-described filter arrangement, and various arrangement modes are possible.

(2) In the first to fifth embodiments, the color filter is formed in the opening of the parallax barrier. For example, a color filter layer is separately formed, and the parallax barrier and the upper glass substrate are separated. You may arrange | position between. Even in this case, it is not necessary to form a color filter between the pixel electrode substrate and the common electrode substrate. Therefore, variation in the layer thickness between the pixel electrode substrate and the common electrode substrate can be suppressed, and unevenness of the voltage applied to the subpixel can be suppressed.

(3) In the first to fifth embodiments, the liquid crystal panel including the light source, the pixel electrode, the common electrode, and the liquid crystal layer between the electrodes has been described. For example, the pixel electrode, the common electrode, and the courage light emitting layer between the electrodes You may use the organic electroluminescent display comprised by these. The organic EL display includes an organic light emitting layer provided on a plurality of pixel electrodes. The electrode layer may be provided on the organic light emitting layer. Here, the organic light emitting layer may be a layer that emits white light.

(4) In the first to fifth embodiments, the active matrix type liquid crystal panel has been described. For example, a passive matrix type configured by using striped electrodes extending in a direction in which a pair of electrodes intersect each other. Alternatively, a liquid crystal panel may be used.

  As mentioned above, although the various Example of this invention was described, this invention is not limited to these Examples, A various structure can be taken in the range which does not deviate from the meaning.

Explanatory drawing which illustrates schematic structure of the image display apparatus in 1st Example. Sectional drawing of the liquid crystal panel in 1st Example. Explanatory drawing referred about the manufacturing process of CF barrier in 1st Example. The schematic diagram explaining arrangement | positioning of the color filter in 1st Example. Explanatory drawing explaining the directional display system of the image display apparatus in 1st Example. Explanatory drawing explaining arrangement | positioning of the color filter in 2nd Example. Explanatory drawing explaining arrangement | positioning of the color filter in 3rd Example. Explanatory drawing explaining arrangement | positioning of the color filter in 4th Example. Sectional drawing which illustrates the structure of the liquid crystal panel in 5th Example. Explanatory drawing which illustrates schematic structure of the image display apparatus in 6th Example. Sectional drawing of the liquid crystal panel in 6th Example.

Explanation of symbols

70, 71, 72, 73 ... Pixel table 100 ... Image display device 104 ... Liquid crystal panel drive unit 105 ... Upper polarizing plate 110 ... Parallax barrier with color filter 111 ... Shading part 112, 112a, 112b ... Opening part 115, 115b ... Upper glass substrate 116 ... Transparent glass substrate 117 ... Common electrode layer 120 ... Color filter 125 ... Liquid crystal layer 130 ... Lower glass substrate 132 ... Pixel electrode 135 ... Lower polarizing plate 140 ... Backlight 150, 150a, 150b ... Liquid crystal panel 200 ... Transparent Glass substrate 211 ... Light-shielding part 212 ... Opening part 250 ... Color filter 515 ... Thick film transparent resin

Claims (11)

An image display device that displays a first image in a first viewing direction and displays a second image in a second viewing direction,
An image forming unit provided with a plurality of first subpixels used for forming the first image and a plurality of second subpixels used for forming the second image;
A light-shielding portion and a plurality of openings, which emit light from each first sub-pixel in the first viewing direction and emit light from each second sub-pixel in the second viewing direction; Injection direction regulating means;
An image display device comprising: a plurality of color filter elements that are disposed in the plurality of openings and transmit light of a predetermined wavelength among light from the plurality of first subpixels and the plurality of second subpixels. The image display device according to claim 1,
Each of the first subpixels and each of the second subpixels is associated with a filter element of any one of the plurality of colors,
Among the plurality of first sub-pixels, a first sub-pixel group configured by the first sub-pixels arranged close to each other and corresponding to the filter elements of different colors is the first image. Represents one pixel of
Among the plurality of second sub-pixels, a second sub-pixel group configured by the second sub-pixels arranged in close proximity and corresponding to the filter elements of different colors is the second image. An image display device representing one pixel. The image display device according to claim 1 or 2,
A plurality of pixel electrodes corresponding to a plurality of first subpixels used for forming the first image and a plurality of second subpixels used for forming the second image are formed on the first surface. A formed first substrate;
An electrode layer provided to face the plurality of pixel electrodes;
A second substrate having a second surface facing the first surface and a third surface on the back side of the second surface;
An electro-optic layer interposed between the plurality of pixel electrodes and the electrode layer,
The image forming unit includes the plurality of pixel electrodes, the electrode layer, and the electro-optic layer. The image display device according to claim 3,
The emission direction restricting means is an image display device disposed between the electrode layer and the second substrate. The image display device according to claim 3 or 4, wherein
In the first substrate, the pixel electrodes corresponding to the plurality of first subpixels and the plurality of second subpixels are alternately formed in a row direction and a column direction, respectively.
The emission direction regulating means has an image display device having a matrix structure in which the light shielding portion and the openings are alternately formed in a row direction and a column direction of the pixel electrode array. The image display device according to claim 5,
The color filter is arranged so that the filter elements of each color are repeatedly arranged in a predetermined order in the row direction of the pixel electrode array, and the filter elements of the same color are arranged shifted by one row and one column. An image display device. The image display device according to claim 5,
The color filter is arranged such that the filter elements of the respective colors are repeatedly arranged in a predetermined order in the row direction of the pixel electrode arrangement, and the filter elements of the same color are arranged in the column direction of the pixel electrode arrangement An image display device. The image display device according to claim 3 or 4, wherein
In the first substrate, the plurality of pixel electrodes corresponding to each of the plurality of first subpixels and the plurality of second subpixels are alternately formed in a row direction,
The emission direction restricting means is an image display device having a vertical stripe structure in which the light shielding portions and the openings are alternately formed in a row direction of the arrangement of the plurality of pixel electrodes. The image display device according to claim 8,
In the color filter, the filter elements of each color are repeatedly arranged in a predetermined order in the row direction of the array of the plurality of pixel electrodes, and the filter elements of the same color are arranged in the column direction of the array of the plurality of pixel electrodes. An image display device arranged in a line. The image display device according to claim 8,
The color filter is arranged so that the filter elements of each color are repeatedly arranged in a predetermined order in the column direction of the pixel electrode array, and the filter elements of the same color are arranged in the row direction of the pixel electrode array. An image display device. The image display device according to any one of claims 3 to 10,
An image display device, wherein a resin layer is provided between the injection direction regulating means and the electrode layer.

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