CN202141873U

CN202141873U - Color filter and liquid crystal display panel

Info

Publication number: CN202141873U
Application number: CN 201120262472
Authority: CN
Inventors: 吴洪江; 陈一鸣
Original assignee: BOE Technology Group Co Ltd; Beijing BOE Display Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Beijing BOE Display Technology Co Ltd
Priority date: 2011-07-22
Filing date: 2011-07-22
Publication date: 2012-02-08
Anticipated expiration: 2021-07-22

Abstract

The utility model relates to the technical field of liquid crystal display and provides a color filter and a liquid crystal display panel. The color filter comprises a glass substrate on which a common electrode layer is formed and a black matrix and a color filter film which are sequentially formed on one face of the glass substrate where the common electrode layer is formed, wherein patterns of the common electrode layer are identical to patterns of the black matrix. The color filter utilizes the formed patterns of the black matrix as a pattern composition mother plate to etch the common electrode layer and accordingly form the common electrode layer having the same pattern with the black matrix. The color filter obtained in the method is not blocked by the common electrode layer at an opening area of the black matrix, thereby remarkably improving transmissivity of the color filter, improving brightness of a liquid crystal display device, saving power consumption and reducing cost.

Description

Colored filter and liquid crystal panel

Technical field

The utility model relates to technical field of liquid crystal display, particularly a kind of colored filter and liquid crystal panel.

Background technology

Advantage such as that LCD (Liquid Crystal Display, liquid crystal display) device has is in light weight, thin thickness, low in energy consumption and radiation are little has been widely used in fields such as infotech, multimedia technology, and has become the main flow of various display device gradually.Along with the development of display technique, high permeability, large scale, low-power consumption, LCD becomes the direction of future development cheaply.

Want to make liquid crystal panel to realize colored demonstration, colored filter (CF, Color Filter) is one of important components, and its performance is to the effect important influence of liquid crystal display.Because colored filter has determined the colored display quality and the brightness of display, thereby spectral transmission and the expressivity of tone isochrome colour display screen can be extremely important concerning colored filter.

Fig. 1 is the planar structure synoptic diagram of the common pixel cell of colored filter in the prior art; At black matrix (BM; Black Matrix) is formed with red (R), green (G), blue (B) three color sub-pixel elements in the pixel cell that surrounds, in addition, on black matrix zone, also is formed with the chock insulator matter (PS that is used to support; Photo Spacer), chock insulator matter is generally column.

In existing technology, the manufacturing of colored filter generally comprises the preparation flow that forms public electrode (being generally nesa coatings such as ITO or IZO), black matrix, RGB color filter film, protective seam (OC, OverCoat claim overlayer again), chock insulator matter successively.A kind of common hierarchical structure of the colored filter that obtains thus is as shown in Figure 2; Fig. 2 is the schematic cross-section that obtains along A-A direction among Fig. 1, and this common hierarchical structure mainly is made up of common electrode layer (ITO film) 2, glass substrate 1, black matrix 3, color filter film 4, protective seam 5 and chock insulator matter 6 successively.

Common electrode layer 2 is formed on the whole surface at the glass substrate 1 back side different faces of place face such as (promptly with) BM in the hierarchical structure of Fig. 2, when the initial or last step of preparation, forms.Certainly also common electrode layer 2 can be formed at glass substrate 1 front (being the face at place such as BM) and is positioned on the whole surface on the protective seam 5, and preparation forms after protective seam.

No matter be above-mentioned which kind of structure; The deficiency of prior art is mainly reflected in: because common electrode layer 2 is formed on the whole surface of colored filter; Promptly the open region (being the color sub-pixel elements region) at black matrix also has common electrode layer; Thereby when the light transmission, will inevitably cause certain loss to influence the transmitance of panel, influence the brightness and the display effect of liquid crystal panel.Just need to increase backlight number raising brightness backlight if overcome this defective, this can cause the consumption of power consumption, cost of idleness again.

The utility model content

The technical matters that (one) will solve

To above-mentioned shortcoming; Public electrode causes the low problem of colored filter transmitance to the utility model in the prior art in order to solve; A kind of colored filter and liquid crystal panel are provided; Form and the common electrode layer of deceiving the matrix identical patterns through simple structure and technology, make light when the color sub-pixel elements zone is crossed in transmission, reduce the loss as far as possible, improved the transmitance of colored filter.

(2) technical scheme

For solving the problems of the technologies described above, the utility model specifically adopts following scheme to carry out:

At first, the utility model provides a kind of colored filter, and said colored filter comprises:

On certain one side, be formed with the glass substrate of common electrode layer,

And the black matrix, the color filter film that on the one side of the said glass substrate that is formed with common electrode layer, form successively;

Wherein, the pattern of said common electrode layer is identical with the pattern of said black matrix.

Preferably, said black matrix and said common electrode layer are positioned at the same one side of said glass substrate, and said black matrix is covered on the said common electrode layer.

Preferably, said black rectangular is formed on the opposite face of the said glass substrate relative with said common electrode layer.

Preferably, said common electrode layer is the transparent conductive film that ITO or IZO form.

Preferably, on said black matrix, color filter film, be formed with protective seam, chock insulator matter.

Preferably, has the pattern that overlaps fully with said black matrix with the pattern of said black matrix as the said common electrode layer of composition mother matrix.

Further, the utility model provides a kind of liquid crystal panel simultaneously, comprises aforesaid colored filter in the said liquid crystal panel.

(3) beneficial effect

Black matrix pattern after the utility model utilization is shaped is carried out etching as the composition mother matrix to common electrode layer; Thereby form the common electrode layer identical with black matrix pattern; The colored filter that obtains thus is not owing to have stopping of common electrode layer at the open region of deceiving matrix; Can significantly improve the transmitance of colored filter, thus improved liquid crystal display device brightness, practiced thrift power consumption and reduced cost.

Description of drawings

Fig. 1 is the planar structure synoptic diagram of a common pixel cell of colored filter;

Fig. 2 is the common hierarchical structure synoptic diagram of colored filter of the prior art;

Fig. 3 is the hierarchical structure synoptic diagram of the colored filter of embodiment 1 in the utility model;

Fig. 4 forms common electrode layer floor map afterwards among the utility model embodiment 1;

Fig. 5 forms black matrix pattern floor map afterwards among the utility model embodiment 1;

Fig. 6 forms black matrix pattern hierarchical structure synoptic diagram afterwards among the utility model embodiment 1;

Fig. 7 forms public electrode layer pattern hierarchical structure synoptic diagram afterwards among the utility model embodiment 1;

Fig. 8 is the hierarchical structure synoptic diagram of the colored filter of embodiment 2 in the utility model.

Embodiment

To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment is a part of embodiment of the utility model, rather than whole embodiment.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belongs to the scope that the utility model is protected.

Black matrix pattern after the utility model utilization is shaped is carried out etching as the composition mother matrix to common electrode layer; Thereby form the common electrode layer identical with black matrix pattern; Can obtain the colored filter that the open region (being the color sub-pixel elements region) at black matrix does not have common electrode layer to stop thus; Owing to do not have the common electrode layer that stops color sub-pixel elements zone transmitted light, thereby the transmitance of the colored filter in the utility model has obtained significant lifting.

Particularly, the mode that can take to describe among the following embodiment of the colored filter in the utility model constitutes.

Embodiment 1

The embodiment 1 of the utility model is as shown in Figure 3; Fig. 3 is similarly the schematic cross-section that obtains along A-A direction among Fig. 1; It has represented the hierarchical structure of the utility model embodiment 1; In hierarchical structure shown in Figure 3, colored filter is made up of glass substrate 1 and the common electrode layer 2 that on the one side of glass substrate 1, forms successively, black matrix 3, color filter film 4, protective seam 5 and chock insulator matter 6; Wherein, the pattern of common electrode layer 2 is identical with the pattern of black matrix 3.In present embodiment 1, common electrode layer 2 is formed on the same one side of glass substrate 1 with black matrix 3, and black matrix 3 directly is covered on the common electrode layer 2.

The colored filter of present embodiment 1 is concrete to adopt following mode to prepare:

At first, as shown in Figure 4, the transparent conductive film of sputter one deck ITO or IZO is to form common electrode layer 2 on the one side of glass substrate 1;

Secondly, as shown in Figure 5, on common electrode layer 2, adopt conventional mode to deceive matrix technology (like a series of processing such as coating, exposure, developments), obtain having the black matrix 3 of specific pattern; The hierarchical structure that obtains product this moment is as shown in Figure 6, and Fig. 6 is the sectional view that obtains along B-B direction among Fig. 5;

Subsequently, utilize the composition mother matrix of the pattern of black matrix 3, common electrode layer 2 is carried out etching, thereby make that the pattern of pattern and black matrix 3 of common electrode layer 2 is identical as etching common electrode layer 2; The hierarchical structure of the product that obtain this moment is as shown in Figure 7;

At last, on black matrix 3, form color filter film 4, protective seam 5 and chock insulator matter 6 more successively, form colored filter as shown in Figure 3.

Embodiment 2

The embodiment 2 of the utility model is as shown in Figure 8; Fig. 8 is similarly the schematic cross-section that obtains along A-A direction among Fig. 1; It has represented the hierarchical structure of the utility model embodiment 2; In hierarchical structure shown in Figure 8, only be that with the difference of embodiment 1 common electrode layer 2 and black matrix 3 lay respectively on the upper and lower surfaces of glass substrate 1, the hierarchical structure of all the other each layers on black matrix 3 is as broad as long.

In present embodiment 2; On two faces of glass substrate 1, form common electrode layer 2 and black matrix 3 at first respectively with specific pattern; Different with embodiment 1 is; Common electrode layer 2 might not be strict with at the black matrix 3 of preparation and be formed before, and the transparent conductive film formation common electrode layer 2 of sputter one deck ITO or IZO gets final product in the arbitrary step before preparing preparation color filter film 4.

After obtaining having the black matrix 3 of specific pattern; The pattern of the black matrix 3 of utilization (can be used as mask in the present embodiment 2 as the composition mother matrix of etching common electrode layer 2; Because glass substrate 1 is transparent with common electrode layer 2; Can make light see through and make public), common electrode layer 2 is carried out etching, thereby make that the pattern of pattern and black matrix 3 of common electrode layer 2 is identical;

At last, on black matrix 3, form color filter film 4, protective seam 5 and chock insulator matter 6 more successively, form colored filter as shown in Figure 8.

In the utility model; Because the pattern of common electrode layer and black matrix is identical; Thereby not having stopping of common electrode layer at the open region (being the color sub-pixel elements region) of black matrix, the light that makes backlight send has reduced loss when the color sub-pixel elements region is crossed in transmission, thereby can promote the transmitance of colored filter significantly; Need not to increase the brightness that backlight number or intensity can improve liquid crystal display device, practiced thrift power consumption and reduced cost.Colored filter in the utility model can be widely used in liquid crystal panel and the liquid crystal indicator because preparation technology is simple, superior performance and display effect are good.

Above embodiment only is used to explain the utility model; And be not the restriction to the utility model; The those of ordinary skill in relevant technologies field under the situation of spirit that does not break away from the utility model and scope, can also be made various variations and modification; Therefore all technical schemes that are equal to also belong to the category of the utility model, and the real protection scope of the utility model should be defined by the claims.

Claims

1. a colored filter is characterized in that, said colored filter comprises:

Be formed with the glass substrate of common electrode layer,

2. colored filter according to claim 1 is characterized in that, said black matrix and said common electrode layer are positioned at the same one side of said glass substrate, and said black matrix is covered on the said common electrode layer.

3. colored filter according to claim 1 is characterized in that, said black rectangular is formed on the opposite face of the said glass substrate relative with said common electrode layer.

4. colored filter according to claim 1 is characterized in that, said common electrode layer is the transparent conductive film that ITO or IZO form.

5. according to each described colored filter of claim 1-4, it is characterized in that, on said black matrix, color filter film, be formed with protective seam, chock insulator matter.

6. according to each described colored filter of claim 1-4, it is characterized in that having the pattern that overlaps fully with said black matrix as the said common electrode layer of composition mother matrix with the pattern of said black matrix.

7. a liquid crystal panel is characterized in that, comprises each described colored filter like claim 1-6 in the said liquid crystal panel.