CN2682433Y

CN2682433Y - Color screen

Info

Publication number: CN2682433Y
Application number: CN 03205372
Authority: CN
Inventors: 陈玠伯; 洪瑞隆; 宋启贤; 范乃翊; 刘明邦
Original assignee: Quanta Display Inc
Current assignee: AU Optronics Corp
Priority date: 2003-08-21
Filing date: 2003-08-21
Publication date: 2005-03-02
Anticipated expiration: 2013-08-21

Abstract

The utility model relates to a color screen, which is primarily composed of a substrate, a black matrix and a plurality of color films. Wherein, the black matrix is arranged on the substrate, and the black matrix is provided with a plurality of grid points which are exposed out of the surface of the substrate; the color films are installed in the grid points of the black matrix respectively. The overlapping width a of the color film and the black matrix is between 0 and 6. 0 micrometres, and the overlapping thickness b of the color film and the black matrix is between 0 and 1. 0 micrometre. In addition, the thickness of the color film c is supposed to be greater than or equal to the thickness of the black matrix d. In making, the color screen structure of the utility model can obtain the required flatness without flat layer.

Description

Colored filter

Technical field

The utility model relate to a kind of colored filter (Color Filter, C/F), and particularly relevant for a kind of colored filter that can improve edge look uneven phenomenon (Edge Mura).

Background technology

At improving rapidly of multimedia society, be indebted to the tremendous progress of semiconductor element or man-machine display device mostly.With regard to display, (Cathode Ray Tube CRT) because of having excellent display quality and its economy, monopolizes monitor market in recent years to cathode-ray tube (CRT) always.Yet, operate the environment of most terminating machine/display equipments on the table for the individual, or with the incision of the viewpoint of environmental protection, if predicted with the trend of saving the energy, cathode-ray tube (CRT) is because of still existing a lot of problems in space utilization and the energy resource consumption, and can't effectively provide solution for the demand of light, thin, short, little and low consumpting power.Therefore, have that high image quality, space utilization efficient add, the Thin Film Transistor-LCD (Thin Film Transistor Liquid Crystal Display, TFT LCD) of low consumpting power, advantageous characteristic such as radiationless becomes the main flow in market gradually.

At present LCD all towards full-colorization, large scale, high-res and cheaply direction develop, so LCD must can obtain the effect of colorize demonstration by colored filter.Colored filter normally framework on a transparent glass substrate, dispose on this transparent glass substrate in order to pass black matrix (the Black Matrix of light, BM) and corresponding to red rete, green rete and blue rete that each pixel is arranged, below will describe at the detailed structure of colored filter.

Fig. 1 is the structural representation of known colored filter.Please refer to Fig. 1, known colored filter 100 mainly is by a substrate 102, one black matrix 104, a plurality of colored rete 108, a flatness layer 110 and is constituted with electrode 112 altogether.Wherein, black matrix 104 is to be disposed on the surperficial 102a of substrate 102, and black matrix 104 has a plurality of lattice points 106, exposes with the surperficial 102a with substrate 102.Colored rete 108 (red, green, blueness) is to be disposed in the lattice point 106 of black matrix 104.It should be noted that flatness layer 110 is to be disposed on colored rete 108 and the black matrix 104, above-mentioned common electrode 112 then is to be disposed on the flat surfaces that flatness layer 110 provided.

Fig. 2 illustrates the making process block diagram into known colored glory sheet.Please be simultaneously with reference to Fig. 1 and Fig. 2, known colored filter 100 comprises the following step on making: at first, provide a substrate 102, this substrate 102 is generally glass substrate, plastic substrate, acryl substrate or other transparency carriers (S120).Then on substrate 102, form colored rete 108 and black matrix 104, simultaneously colored rete 108 and black matrix 104 overlapping width a are controlled at greater than the situation more than 10 microns, and colored rete 108 and black matrix 104 overlapping thickness b are controlled at (S130) between 1.2 microns to 1.6 microns

Please refer to Fig. 1 and Fig. 2 equally; because above-mentioned design rule regular meeting causes colored rete 108 blocked up with the thickness of black matrix 104 overlappings; cause and place the liquid crystal bug hole to stand on colored rete 108 and black matrix 104 overlappings in order to the separation material (spacer) of keeping the bug hole spacing; and make that the bug hole spacing (cell gap) of liquid crystal bug hole (LC cell) is inconsistent, and make LCD the phenomenon of edge look inequality occur.Therefore, known technology can form a flatness layer 110 earlier usually on colored rete 108 and black matrix 104 (S140), then forms common electrode 112 (S150) on flatness layer 110 again, to avoid the problem of above-mentioned edge look inequality.

In the known colorful filter structure, must adopt flatness layer to solve the problem of edge look inequality, but the making of flatness layer will make the processing procedure cost further to reduce.

Summary of the invention

Therefore, the purpose of this utility model is providing a kind of colorful filter structure that can improve edge look uneven phenomenon (Edge Mura) exactly.

A purpose more of the present utility model provides a kind of color filter producing process that can improve edge look uneven phenomenon (Edge Mura).

For reaching above-mentioned purpose, the utility model proposes a kind of colorful filter structure, constituted by a substrate, a black matrix and a plurality of colored rete.Wherein, black matrix is to be disposed on the substrate, and this black matrix has a plurality of lattice points that expose substrate surface, and colored rete then is disposed at respectively in the lattice point of black matrix.The overlapping width a of above-mentioned colored rete and black matrix is between 0～6.0 micron, and the overlapping thickness b of colored rete and black matrix is between 0～1.0 micron.In addition, the thickness c of above-mentioned colored rete for example is the thickness d more than or equal to black matrix.

In the preferred embodiment of the present utility model, substrate for example is transparency carriers such as glass substrate, plastic substrate, acryl substrate.

In the preferred embodiment of the present utility model, the material of black matrix for example is shading materials such as shading resin or chromium metal.

In the preferred embodiment of the present utility model, colored rete has for example comprised red rete, green rete and blue rete, and the arrangement mode of these red retes, green rete and blue rete for example is mosaic arrangement (Mosaic type), stripe-arrangement (stripe type), the arrangement of four pixels (four pixels type) and rounded projections arranged kenels such as (triangle type).

In the colorful filter structure of the present utility model, comprise that more one directly is made in the common electrode (common electrode) on black matrix and the colored rete, and the material of this common electrode for example is indium tin oxide (ITO), indium-zinc oxide electrically conducting transparent materials such as (IZO).

(width is between 0～6.0 micron in proper range because the utility model is with the width of lap between colored rete and the black matrix and THICKNESS CONTROL, thickness is between 0～1.0 micron), so the utility model can effectively be avoided edge look inequality (Edge Mura) phenomenon that causes because of coating thickness difference is excessive.

Description of drawings

Fig. 1 is the structural representation of known colored filter;

Fig. 2 is the making process block diagram of known colored filter;

Fig. 3 is the structural representation according to the utility model one preferred embodiment colored filter;

Fig. 4 is the making process block diagram according to the utility model one preferred embodiment colored filter; And

Fig. 5 illustrates and is the making process block diagram according to another preferred embodiment colored filter of the utility model.

Graphic sign explanation

100,200: colored filter

102,202: substrate

102a, 202a: surface

104,204: black matrix

106,206: lattice point

108,208: colored rete

110: flatness layer

112,210: common electrode

For above-mentioned and other purposes of the present utility model, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below:

Embodiment

Fig. 3 illustrates and is the structural representation according to the utility model one preferred embodiment colored filter.Please refer to Fig. 3, the colored filter 200 of present embodiment mainly is by a substrate 202, one black matrix 204, a plurality of colored rete 208 and is constituted with electrode 210 altogether.Wherein, black matrix 204 is to be disposed on the surperficial 202a of substrate 202, and black matrix 204 has a plurality of lattice points 206, exposes with the surperficial 202a with substrate 202.Colored rete 208 (red, green, blueness) is to be disposed in the lattice point 206 of black matrix 204.Colored filter that it should be noted that present embodiment need be in order to the flatness layer of planarization, and common electrode 210 is directly to be disposed on black matrix 204 and the colored rete 208.

Please refer to Fig. 3 equally, above-mentioned substrate 202 for example is transparency carriers such as glass substrate, plastic substrate, acryl substrate.The material of black matrix 204 for example is shading metals such as the shading resin of acrylic acid materials such as (acrylicacid) or chromium metal.Colored rete 208 for example is to have comprised red rete, green rete and blue rete, and the arrangement mode of these red retes, green rete and blue rete for example is mosaic arrangement (Mosaic type), stripe-arrangement (stripe type), the arrangement of four pixels (four pixels type) and rounded projections arranged kenels such as (triangle type).In addition, the material of the common electrode of present embodiment for example is indium tin oxide (ITO), indium-zinc oxide electrically conducting transparent materials such as (IZO).

Fig. 4 illustrates and is the making process block diagram according to the utility model one preferred embodiment colored filter.At first please be simultaneously with reference to Fig. 3 and Fig. 4, the colored filter 200 of present embodiment comprises the following step on making: at first, provide a substrate 202 (S300).Then on substrate 202, form colored rete 208 and black matrix 204, simultaneously colored rete 208 and black matrix 204 overlapping width a are controlled at the situation between 0 micron 6.0 microns, and colored rete 108 and black matrix 104 overlapping thickness b are controlled at (S310) between 0 micron to 1.0 microns.

Please refer to Fig. 3 and Fig. 4 equally, because present embodiment is limited in above-mentioned overlapping width a between 0 micron 6.0 microns, and with overlapping thickness limits between 0 micron 1.0 microns, therefore colored rete 208 can't reach blocked up degree with the thickness of black matrix 204 overlappings, also so not has the problem of the inconsistent caused edge look inequality of bug hole spacing (Cell gap).From the above, each coating of the present utility model (colored rete 208 and black matrix 204) overlapping does not have the blocked up problem of thickness, therefore can be formed directly in common electrode 210 on colored rete 208 and black matrix 204 (S320), promptly finish the making of colored filter 200.

Fig. 5 illustrates and is the making process block diagram according to another preferred embodiment colored filter of the utility model.Please be simultaneously with reference to Fig. 3 to Fig. 5, the making flow process of present embodiment is similar to Fig. 4, precisely because the difference part is: except the overlapping thickness b to the overlapping width a of colored rete 208 and black matrix 204 and colored rete 108 and black matrix 104 limited, the thickness c that present embodiment more limits colored rete 208 was the thickness d that is greater than or equal to black matrix 204.

Then please refer to table one, this tabular goes out known Thin Film Transistor-LCD (TFT-LCD) and Thin Film Transistor-LCD of the present utility model after through 140 sampling spots samplings, the comparison on the parameters.Wherein, known Thin Film Transistor-LCD is to adopt colored filter shown in Figure 1, and Thin Film Transistor-LCD of the present utility model then is to adopt colored filter shown in Figure 3.

Known technology the utility model

0.593 micron 0.241 micron of bug hole spacing difference (R=dmax-dmin)

Standard deviation (Std.Dev) 0.126 0.050

Number of sampling (n) 140 140

CV value (standard deviation/mean value) 2.61 1.165

Table one

As shown in Table 1, the spacing degree of planarization of the utility model colored filter is very good, though be bug hole spacing difference (R=dmax-dmin), standard deviation (Std.Dev) and CV value between each sampling spot all less than the data of known technology, the data of each side show that all the degree of uniformity (uniformity) of colored filter of the present utility model on thickness can be better than known technology.

In sum, colorful filter structure of the present utility model and processing procedure thereof have following advantage at least:

1, (width is between 0～6.0 micron in proper range with the width of lap between colored rete and the black matrix and THICKNESS CONTROL for the utility model, thickness is between 0～1.0 micron), can avoid the edge look uneven phenomenon that causes because of coating thickness difference is excessive.

2, (width is between 0～6.0 micron in proper range with the width of lap between colored rete and the black matrix and THICKNESS CONTROL for the utility model, thickness is between 0～1.0 micron), and the thickness of controlling colored rete is greater than or equal to the thickness of black matrix, can avoid the edge look uneven phenomenon that causes because of coating thickness difference is excessive.

3, the utility model making of not needing again to carry out flatness layer in colored rete and black matrix top can reach required smooth degree, makes manufacturing method of color filters more simplify.

Though the utility model discloses as above with a preferred embodiment; right its is not in order to limit the utility model; anyly have the knack of this skill person; in not breaking away from spirit and scope of the present utility model; when doing a little change and retouching, therefore protection domain of the present utility model is as the criterion when looking accompanying the claim person of defining.

Claims

1, a kind of colored filter comprises:

One substrate;

One black matrix is disposed on this substrate, wherein should have some lattice points that expose this substrate surface by black matrix; And

Some colored retes are disposed in the described lattice point, and wherein said colored rete is a with should black matrix overlapping width, and described colored rete is b with should black matrix overlapping thickness, and a=0～6.0 micron, b=0～1.0 micron.

2, colored filter as claimed in claim 1 is characterized in that, the thickness of described colored rete is c, is d and be somebody's turn to do the thickness of deceiving matrix, and satisfies the condition of c 〉=d.

3, colored filter as claimed in claim 1 is characterized in that, this substrate is a transparency carrier.

4, colored filter as claimed in claim 1 is characterized in that, the material of this black matrix comprises the shading resin.

5, colored filter as claimed in claim 1 is characterized in that, the material of this black matrix comprises the chromium metal.

6, colored filter as claimed in claim 1 is characterized in that, described colored rete comprises:

Some red retes;

Some green retes; And

Some blue retes.

7, colored filter as claimed in claim 6 is characterized in that, the arrangement mode of described red rete, described green rete and described blue rete comprises, mosaic arrangement, stripe-arrangement, four pixels arrange and rounded projections arranged in one.

8, colored filter as claimed in claim 1 is characterized in that, more comprises using electrode altogether, and its this common electrode is to be disposed on this black matrix and the described colored rete.

9, colored filter as claimed in claim 1 is characterized in that, the material of this common electrode comprises in indium tin oxide, the indium-zinc oxide.