JPH07261166A - Method for arranging color filter pixel of liquid crystal display device - Google Patents

Abstract

PURPOSE:To provide an excellent color reproducibility and precise image reproducibility and to make an outline plotted by a set of a pixel a smooth shape by making a two-dimensional shape of the pixel regular hexagonal or circle, or its approximate shape and repeatedly performing the combination arranged so that distances between centers of respective pixels R, G, B adjacent to each other are equalized in two- dimension. CONSTITUTION:The two-dimensional shape of the pixel 3 forms a regular hexagon, and concerning the arrangement, in the state that respective sides of the pixels 3 are arranged closed to each other, respective pixels 3 of R, G, B are in the relation where the distances between the centers Ps of respective pixels are equalized, that is, in the positional relation where the shape linking the centers P1, P2, P3 of respective pixels R, G, B forms a regular triangle, and by successively repeating the combination, a color filter of a liquid crystal display screen is formed. Further, it is similar also in the cases that the two-dimensional shape of the pixel 3 is made the regular hexagon or the shape close to the circle, e.g. is made the shape where the external angles of the regular hexagon are rounded or the shape where respective sides of the regular hexagon are rounded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color filter used for a display surface of a liquid crystal display device used as a display screen of a laptop personal computer, a portable television, an automobile navigation system and the like.

[0002]

2. Description of the Related Art A pixel array of a color filter found in a conventional liquid crystal display device includes a stripe array shown in FIG. 4, a mosaic array shown in FIG. 5, a triangle array shown in FIG. The basic structure of either method is shown in FIG.
As shown in Fig. 2, R (red) and G, whose boundaries are shielded by a black matrix, are provided on a glass substrate.
Pixels which are color filter layers of three colors (green) and B (blue) are formed, and the surface thereof is further covered with a protective film such as a transparent synthetic resin. In addition, the pixels of the conventional color filter have a rectangular two-dimensional shape, and in the above-described conventional examples, the rectangular pixel array is changed.

[0003]

In a three-color set of pixels of R, G, and B, which are the three primary colors of light, which is the basis of color reproduction, the shaded areas 1 in FIG. 4, FIG. 5, and FIG. The distances between the centers of the R, G, and B pixels of the unit are not uniform in all cases, so the color balance is poor,
Moire etc. due to color stripes and collection of colors are conspicuous,
Since the outside angle of the pixel is a right angle and the jaggedness is conspicuous,
The contrasted image lacked smoothness in its contour.

[0004]

The present invention proposes a liquid crystal display color filter which has high reproducibility of colors and shapes in a liquid crystal display image and is easy to manufacture, and has a two-dimensional pixel structure. The shapes are regular hexagons and / or circles, and are adjacent to each other R,
The arrangement of the color filter pixels of the liquid crystal display device is formed by repeating two-dimensionally the combination in which the centers of the G and B pixels are equidistant from each other.

[0005]

In the first place, the colors displayed on the liquid crystal display device are physiologically three primary colors of light, R (red), G (green),
Independent light that passes through the B (blue) pixel is sent to the visual center of the cerebrum through the visual system, where color mixing occurs and color perception occurs, which is seen as a "certain color." As a condition for accurate reproduction, not only the total area of each pixel is equal and evenly distributed on the screen, but also in the pixel array, the centers of R, G, and B pixels are equidistant from each other. It is necessary to be. According to the present invention, as shown in FIG. 1, the centers of the R, G and B pixels are equidistant from each other, that is, the shape connecting the centers of the R, G and B pixels is a two-dimensional equilateral triangle. Because of the positional relationship that is established, accurate color reproducibility can be obtained.

Further, since the image displayed on the liquid crystal display device is formed by a collection of transmitted light of each pixel, accurate center shape of each pixel of R, G and B is required for accurate shape reproducibility of the image. It is desirable that the distances be equidistant from each other, and it is a necessary condition that the external angle is smooth in the two-dimensional shape of the pixel. In the present invention, when the two-dimensional shape of a pixel is a regular hexagon, the outer angle is 120 degrees, and when it is a circle, it is a radius, and therefore the contour drawn by the set of transmitted light of the pixel has a smooth shape.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described with reference to the drawings. 1 shows a partially enlarged plan view of a color filter of the present invention, and FIG. 2 shows an AA cross section of FIG. In FIG. 2, 1 is a glass substrate, 2 is a black matrix made of light-shielding synthetic resin paint, and 3 is R (red), G (made of synthetic resin containing a light-transmitting dye / pigment, etc. Green),
Pixels forming the B (blue) color filter layer,
Reference numeral 4 is a protective film made of transparent synthetic resin. For reference, the outline of the principle of the liquid crystal display is added, and in FIG.
L. Is a backlight, which is uniformly illuminated in the direction of the arrow in the figure. When passing through the liquid crystal, it is divided into light that travels straight and light that is twisted by 90 degrees. Is blocked by the polarizing plate, and the latter light passes through the polarizing plate and is displayed on the screen.

Returning to FIG. 1, the arrangement of the pixels 3 will be described. FIG. 1 shows a first embodiment of the present invention, in which the two-dimensional shape of a pixel is a regular hexagon and the arrangement thereof is as follows.
In a state where the respective sides of the respective pixels are arranged in close proximity to each other, the R, G, and B pixels have the same distance between the centers of the respective pixels, that is, as shown by the dotted line in FIG. G,
The shape connecting the centers P ₁ , P ₂ , and P ₃ of each B pixel has a positional relationship of forming an equilateral triangle, and the combination is sequentially repeated to form a color filter of a liquid crystal display screen.

FIG. 3 shows a second embodiment of the present invention.
The two-dimensional shape of a pixel forms a circle, and regarding its arrangement,
In the state where the respective sides of the respective pixels are arranged close to each other, the R, G, and B pixels have the same distance between the centers of the respective pixels, that is, the centers of the R, G, and B pixels are The color filters of the liquid crystal display screen are formed by repeating the combination in a positional relationship that forms an equilateral triangle.

Further, not limited to the first and second embodiments, the two-dimensional shape of a pixel is a shape close to a regular hexagon or a circle, for example, a regular hexagon with outer corners rounded or a regular hexagon. The same applies to the case where each side is rounded.

[0011]

According to the present invention having the above-mentioned structure, since the centers of the R, G and B pixels adjacent to each other are equidistant from each other, an accurate color mixture can be obtained and Stripes do not occur, and excellent color reproducibility and accurate image reproducibility can be obtained. Further, since the two-dimensional shape of the pixel is a regular hexagon, a circle, or any one of them, the contour drawn by the set of pixels has a smooth shape. In terms of manufacturing, the two-dimensional shape of the pixel is a regular hexagon, a circle, or a shape similar thereto, so that the shape is well balanced in the vertical and horizontal directions, so that the pixel can be easily manufactured and stable quality can be obtained.

[Brief description of drawings]

FIG. 1 is a partially enlarged view of a plan view of a first embodiment of the present invention.

FIG. 2 is a partially enlarged sectional view of AA of FIG. 1 according to the present invention.

FIG. 3 is a partially enlarged view of a plan view of a second embodiment of the present invention.

FIG. 4 is a partially enlarged view of a plan view of a conventional product, showing an example of a pixel stripe arrangement.

FIG. 5 is a partially enlarged view of a plan view of a conventional product, showing an example of a mosaic arrangement of pixels.

FIG. 6 is a partially enlarged view of a plan view of a conventional product, showing an example of a triangular array of pixels.

[Explanation of symbols]

1 glass substrate 2 black matrix 3 pixel 4 protective film 5 light twisted by liquid crystal B. L. Backlight R G representing red G representing green B representing blue P ₁ R pixel center P ₂ G pixel center P ₃ B pixel center

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideo Yamamoto 17-1-105 Minamihiradai-cho, Shibuya-ku, Tokyo (72) Inventor Hideo Matsuzaki 2920-96 Sugito, Sugito-cho, Kitakatsushika-gun, Saitama Prefecture (72) Inventor Osamu Sato Chiba 1-9-7 Hisujiya, Abiko-shi, Japan (72) Inventor, Katsura Uesaka 2-32-12, Ninomiya, Funabashi, Chiba Prefecture

Claims (2)

[Claims] 1. A method of arranging color filter pixels of a liquid crystal display device, wherein the centers of R, G, and B pixels adjacent to each other are arranged at equidistant positions. 2. The method for arranging color filter pixels in a liquid crystal display device according to claim 1, wherein the two-dimensional shape of the pixel is a regular hexagon, a circle, or a shape close to one of them.