JPH05119310A - Picture display device - Google Patents

Abstract

PURPOSE:To decrease the number of external junctions and to improve workability by dividing each coloring part in a picture element into two parts, arranging them in one picture element in specified arrangement and providing an external connecting terminal common to the respective picture elements. CONSTITUTION:This device is provided with a red filter 2, a green filter 3, and a blue filter 4, and one picture element is constituted of two sets of subdivided color filters of red, green and blue 2-4. In such constitution, one picture element displays eight or more colors by the use of the brightness balance of respective color filters 2-11 inside. Then, the respective color filters 2-4 divided into two parts are integrated in a liquid crystal cell by a wiring pattern 6 consisting of a transparent conductive film. The picture display device is constituted by using such color filters 2-4. Therefore, the space between the external connecting terminals is not made small, the lowering of workability and the increase of working man-hour are avoided. The cost of a product is reduced and the yield of the product is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device using a color filter in which pixels composed of colored portions of three colors of red, green and blue are arranged in a matrix.

[0002]

2. Description of the Related Art Conventionally, in an image display device, particularly a color display, pixels composed of colored portions of three colors of red (R), green (G) and blue (B) as shown in FIG. 7 are arranged in a matrix. Arranged color filters are used. In the figure, 20 is one pixel, 21 is a red filter,
22 is a green filter, and 23 is a blue filter.

In order to enhance the color mixture of this image display device,
A stripe array, a mosaic array, a triangular array, a rectangular array, etc. are used as a matrix array of pixels.

However, in either arrangement, 1
Since the pixel is composed of a combination of one set of red, green, and blue, the expected color mixture is not obtained.

In view of the problems of the prior art, the present applicant has already proposed an image display device with improved color mixing and a color filter used therefor (Japanese Patent Application No. 3-204).
013).

That is, the image display device according to the applicant's proposal is an image display device using a color filter in which pixels composed of colored portions of three colors of red, green and blue are arranged in a matrix. Each colored portion in the pixel is divided into at least two and arranged in a predetermined array in one pixel. The color filter according to the applicant's proposal is a color filter in which pixels composed of colored portions of three colors of red, green, and blue are arranged in a matrix, and each colored portion in the pixel is at least It is characterized in that it is divided into two and arranged in one pixel in a predetermined array.

However, in the color filter according to the applicant's previous proposal, as shown in FIG.
Since the external connection terminals are separately drawn from each of the pixels divided into at least two, there is a problem that the interval between the connection terminals becomes narrow and the workability is poor, and the number of connection work steps increases. Further, since the workability is poor, the yield of products is reduced.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art. Although the color mixing property is improved, the workability is improved because the number of external connection points is reduced. An object of the present invention is to provide an improved image display device and a color filter used therefor.

[0009]

An image display device according to the present invention is an image display device using a color filter in which pixels composed of colored portions of three colors of red, green and blue are arranged in a matrix. Each colored portion in the pixel is divided into two and arranged in one pixel in a predetermined arrangement, and each of the divided two pixels has a common external connection terminal.

The color filter of the present invention is a color filter in which pixels each composed of a colored portion of three colors of red, green and blue are arranged in a matrix, and each colored portion in the pixel is two.
It is characterized in that it is divided and arranged in one pixel in a predetermined arrangement, and each of the two divided pixels has a common external connection terminal.

[0011]

In the present invention, each of the red, green and blue colored portions in one pixel is divided into two and arranged in a predetermined arrangement, and each of the two divided pixels has a common external connection terminal. As a result, the number of external connection terminals does not increase despite the fact that the spacing between the colored portions is reduced and the color mixing of one pixel is improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings, but the present invention is not limited to such embodiment.

FIG. 1 is a conceptual diagram showing the arrangement of subdivided red, green, and blue coloring portions in one pixel according to an embodiment of the present invention, and FIG. 2 is an image display using the arrangement shown in FIG. FIG. 3 is a schematic view of an embodiment of the apparatus, and FIG. 3 is an explanatory view of a wiring pattern of the embodiment shown in FIG. In the figure, 1 is one pixel, 2 is a red filter, 3 is a green filter, and 4 is a blue filter.

As is apparent from FIGS. 1 and 2, one pixel has two
It is composed of a set of subdivided red, green, and blue color filters. In this configuration, one pixel can display eight or more colors due to the brightness balance of the color filters inside the pixel. If the total area of one pixel is the same as the conventional one, the arrangement pitch P1 of each color filter is about half of the conventional pitch P2. Here, for example, when only the red filter is turned on, as shown in FIG. 5, there are two portions where a red color is generated in one pixel. Therefore, the color mixing property is improved and the quality of the displayed image is improved. This becomes clearer as compared with the conventional example shown in FIG. 6 in which only the red filter is turned on.

In the embodiment shown in FIG. 1, the stripe arrangement is adopted as the matrix arrangement, but the present invention can be suitably applied to the mosaic arrangement, the triangular arrangement and the rectangular arrangement.

FIG. 2 is a schematic view of an embodiment of an image display device using the arrangement shown in FIG. In the figure, 5 is one glass substrate, 6 is a wiring pattern made of a transparent conductive film, and 7 is a wiring pattern.
Is a liquid crystal, 8 is the other glass substrate, 9 is a transparent electrode, 10 is a spacer, and D is an image display device. In FIG. 2, the same reference numerals as those in FIG. 1 denote the same or similar elements.

The image display device shown in FIG. 2 has two pixels in one pixel.
It is similar to the conventional image display device of this type except that the divided filters of the same color are integrated in the liquid crystal cell by the wiring pattern made of the transparent conductive film and then extracted to the outside of the liquid crystal cell. The detailed description of the configuration is omitted.

As described above, in the image display device of the present invention, each color filter in one pixel is divided into two, and each of the two divided color filters is formed in the liquid crystal cell by the wiring pattern made of the transparent same electric film. Since they are integrated with each other and are led out to the outside of the liquid crystal cell, the number of external connection points does not increase although the color mixing property in the pixel is improved.

[0019]

As described above, in the image display device of the present invention, the interval between the external connection terminals is not narrowed, so that the workability is not lowered and the work man-hour is not increased. Therefore, the product cost can be reduced and the product yield can be improved. Further, by using the color filter of the present invention, the color mixing property in the pixel is improved, so that it is possible to manufacture an image display device in which the quality of the display image is improved.

Furthermore, since a plurality of filters of the same color are present in one pixel, even if one filter becomes inoperable due to some influence, display failure is less likely to occur.
The reliability of the image display device is improved. Therefore, the yield of products is further improved.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of an embodiment of the present invention.

FIG. 2 is a schematic view of an embodiment of an image display device using the array shown in FIG.

FIG. 3 is an explanatory diagram of a wiring pattern of the embodiment shown in FIG.

FIG. 4 is an explanatory diagram of a wiring pattern of the image display device according to the applicant's proposal.

5 is a conceptual diagram showing an operation of the embodiment shown in FIG.

FIG. 6 is a conceptual diagram showing an operation of a conventional example.

FIG. 7 is a conceptual diagram of a conventional color filter.

[Explanation of symbols]

 1 1 pixel 2 red filter 3 green filter 4 blue filter 6 wiring pattern made of transparent conductive film

Claims (2)

[Claims] 1. An image display device using a color filter in which pixels composed of colored portions of three colors of red, green and blue are arranged in a matrix, wherein each colored portion in the pixel is divided into two. Further, the image display device is arranged in one pixel in a predetermined array, and each of the two divided pixels has a common external connection terminal. 2. A color filter in which pixels composed of colored portions of three colors of red, green, and blue are arranged in a matrix, and each colored portion in the pixel is divided into two and has a predetermined arrangement. The color filter is arranged in one pixel, and each of the two divided pixels has a common external connection terminal.