CN111427210A

CN111427210A - Display panel

Info

Publication number: CN111427210A
Application number: CN202010278860.7A
Authority: CN
Inventors: 张琪; 曹武
Original assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2020-07-17
Anticipated expiration: 2040-04-10
Also published as: CN111427210B

Abstract

The invention provides a display panel. The display panel comprises an array substrate, the array substrate is provided with a pixel area, and the pixel area comprises a substrate, a first routing layer, a color film layer, a second routing layer and a shading layer which are sequentially stacked from bottom to top; the color film layer comprises at least two photoresist units with different colors; the second wiring layer is arranged on the color film layer; the second routing layer comprises DBS routing and pixel electrodes, the pixel electrodes are provided with a plurality of pixel electrode branches, and the pixel electrode branches are arranged adjacent to the DBS routing; the shading layer is arranged above the second routing layer, and the projection of the shading layer completely covers at least one pixel electrode branch on two sides of the light resistance unit, so that the problem that the color of a large visual angle is blue or green can be effectively solved.

Description

Display panel

Technical Field

The invention relates to the technical field of display, in particular to a display panel.

Background

With the development trend of large display screens, the pixel structure of the array substrate has been increased from 2 domains to 4 domains or even 8 domains, and the pixel structure of 4 domains or 8 domains is regarded as important in large-scale display applications with its excellent viewing angle representation, but large viewing angle color cast is still present.

As shown in fig. 1, which is a schematic plan view of a display panel with an 8-domain pixel structure in the prior art, the display panel 90 includes a thin film transistor region 901, and a main pixel region 902 and a sub-pixel region 903 located at upper and lower sides of the thin film transistor region 901, the thin film transistor region 901 mainly adopts a 3T or 3T plus structure, and the main pixel region 902 and the sub-pixel region 903 are both in a 4-domain pixel structure. Since the main pixel region 902 has the defects of dark image brightness and poor display effect at a large viewing angle, the sub-pixel region 903 is used for voltage division to improve the viewing angle performance, but the color shift phenomenon still occurs at the large viewing angle.

As shown in fig. 2, which is a cross-sectional view taken along a-a in fig. 1, the display panel includes an array substrate 910 and a color film substrate 920, the array substrate 910 includes a first substrate 91, a first routing layer 92, a color film layer 93, and a second routing layer 94, which are sequentially stacked from bottom to top, wherein the first routing layer 92 includes a shielding routing 921 and a data routing 922, the second routing layer 94 includes a DBS (dataline BM) routing 941 and a pixel electrode branch 942, which are used for shielding the data routing 922, and the pixel electrode branch 942 is a portion of a pixel electrode and is located at a side adjacent to the DBS routing 941. The color filter substrate 920 includes a light-shielding layer 95 and a second substrate 96, and the light-shielding layer 95 is a Black Matrix (BM). The light-shielding layer 95 is used for physically shielding the pixel electrode branches 942 to improve color shift, but the pixel electrode branches 942 are still seen under a large viewing angle, and the pixel electrode branches 942 are severely brightened in a side view at a middle low gray level, which may aggravate the shift and cause color shift at the large viewing angle.

Therefore, it is necessary to provide a new display panel to optimize the viewing angle color shift problem of the 4-domain or 8-domain pixel structure.

Disclosure of Invention

The present invention provides a display panel, wherein a light shielding layer is disposed above a second routing layer, and a projection of the light shielding layer completely covers pixel electrode branches on two sides of at least one photoresist unit on a color film layer. When the shading layer covers the pixel electrode branches at two sides of the blue light resistance unit, the problem that the color of the 4-domain large visual angle is blue can be effectively solved; when the shading layer covers the pixel electrode branches at the two sides of the green light resistance unit and the blue light resistance unit, the problem that the color of the 4-domain large visual angle is blue can be effectively solved; when the shading layer covers the pixel electrode branches at two sides of the green light resistance unit, the problem that the 8-domain large-visual-angle color is greenish can be effectively solved.

In order to achieve the above object, the present invention provides an array substrate, which is provided with a pixel area, wherein the pixel area includes a substrate, a first routing layer, a color film layer, a second routing layer and a light shielding layer, which are sequentially stacked from bottom to top; specifically, the first routing layer is arranged on the substrate base plate, and the first routing layer comprises data routing; the color film layer is arranged on the first wiring layer; the color film layer comprises at least two photoresist units with different colors; the second wiring layer is arranged on the color film layer; the second routing layer comprises DBS routing and pixel electrodes, the pixel electrodes are provided with a plurality of pixel electrode branches, and the pixel electrode branches are arranged adjacent to the DBS routing; the shading layer is arranged above the second routing layer, and the projection of the shading layer completely covers at least one pixel electrode branch on two sides of the photoresistance unit.

Furthermore, the color film layer includes three photoresist units of different colors, namely a red photoresist unit, a green photoresist unit and a blue photoresist unit.

Furthermore, the projection of the light shielding layer does not cover the pixel electrode branches at two sides of the red light resistance unit and the green light resistance unit, and only covers the pixel electrode branches at two sides of the blue light resistance unit.

Furthermore, the projection of the light shielding layer does not cover the pixel electrode branches at two sides of the red light resistance unit, and covers the pixel electrode branches at two sides of the green light resistance unit and the blue light resistance unit.

Furthermore, the projection of the light shielding layer does not cover the pixel electrode branches at two sides of the red light resistance unit and the blue light resistance unit, and covers the pixel electrode branches at two sides of the green light resistance unit.

Furthermore, the light shielding layer is a black matrix and/or a source drain wiring.

Furthermore, when the angle of view and the array substrate form an included angle of 30-90 degrees, the projection of the light shielding layer completely covers the pixel electrode branches on two sides of at least one light resistance unit.

Furthermore, the array substrate further comprises a transparent substrate arranged on the light shielding layer.

Further, the array substrate further comprises a liquid crystal layer arranged between the substrate and the transparent substrate.

The display panel has the technical effect that the light shielding layer is arranged above the second routing layer, and the projection of the light shielding layer completely covers the pixel electrode branches on two sides of the at least one light resistance unit on the color film layer. When the shading layer covers the pixel electrode branches at two sides of the blue light resistance unit, the problem that the color of the 4-domain large visual angle is blue can be effectively solved; when the shading layer covers the pixel electrode branches at the two sides of the green light resistance unit and the blue light resistance unit, the problem that the color of the 4-domain large visual angle is blue can be effectively solved; when the shading layer covers the pixel electrode branches at two sides of the green light resistance unit, the problem that the 8-domain large-visual-angle color is greenish can be effectively solved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic plan view of a conventional display panel with an 8-domain pixel structure;

FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;

FIG. 3 is a schematic plan view illustrating a display panel according to a first embodiment of the present invention;

FIG. 4 is a cross-sectional view taken at B-B in FIG. 3 in accordance with a first embodiment of the present invention;

FIG. 5 is another cross-sectional view taken at B-B in FIG. 3 in accordance with the first embodiment of the present invention;

FIG. 6 is a cross-sectional view taken at a position B-B in FIG. 3 when the first wiring layer includes source and drain wirings and the light-shielding layer is only a black matrix according to the first embodiment of the present invention;

fig. 7 is a cross-sectional view at B-B in fig. 3 of a second embodiment of the present invention.

Some of the symbols in the drawings are as follows:

1. a substrate base plate, 2, a first wiring layer, 3, a color film layer,

4. a second wiring layer 5, a light shielding layer 6, a transparent substrate,

7. a liquid crystal layer 10, a pixel region 20, a thin film transistor region,

21. data trace, 22, mask trace, 31, red photo-resist unit,

32. green photoresist unit, 33, blue photoresist unit, 41, DBS line,

42. a pixel electrode 100, a display panel 101, a main pixel region,

102. and a sub-pixel area 421, a pixel electrode branch.

Detailed Description

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings for illustrating the invention and enabling those skilled in the art to fully describe the technical contents of the present invention so that the technical contents of the present invention can be more clearly and easily understood. The present invention may, however, be embodied in many different forms of embodiments and the scope of the present invention should not be construed as limited to the embodiments set forth herein.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the drawings, the thickness of layers and regions are exaggerated for clarity. For example, the thicknesses and sizes of elements in the drawings are arbitrarily shown for convenience of description, and thus, the described technical scope is not limited by the drawings.

Example 1

As shown in fig. 3, 4 and 5, in an embodiment of the present invention, a display panel 100 is provided, which includes a pixel region 10 and a thin film transistor region 20, where the pixel region 10 includes a main pixel region 101 and a sub-pixel region 102, and both the main pixel region 101 and the sub-pixel region 102 are 4-domain pixel structures, so that the pixel region 10 is an 8-domain pixel structure, and the thin film transistor region 20 is preferably a 3T1C pixel circuit structure.

The pixel area 10 comprises a substrate 1, a first wiring layer 2, a color film layer 3, a second wiring layer 4 and a shading layer 5 which are sequentially stacked from bottom to top; specifically, the first routing layer 2 is disposed on the substrate base plate 1, and the first routing layer 2 includes data routing 21; the color film layer 3 is arranged on the first wiring layer 2; the color film layer 3 comprises at least two photoresist units with different colors; the second wiring layer 4 is arranged on the color film layer 3; the second routing layer 4 includes DBS (dataline BM less) routing lines 41 and pixel electrodes 42, the DBS routing lines 41 are used for shielding the data routing lines 21, the pixel electrodes 42 are provided with a plurality of pixel electrode branches 421, the pixel electrode branches 421 are part of the pixel electrodes 42, and are located on one side close to the DBS routing lines 41, that is, the pixel electrode branches 421 are located adjacent to the DBS routing lines 41; the light shielding layer 5 is disposed above the second routing layer 4, and a projection of the light shielding layer completely covers at least one pixel electrode branch 421 on two sides of the photoresist unit.

It should be noted that the substrate 1, the first routing layer 2, the color film layer 3, and the second routing layer 4 are located on an array substrate, that is, the color film layer 3 is disposed on the array substrate by using a COA structure of the display panel 100; the shading layer 5 is positioned on the color film substrate.

In this embodiment, the color film layer 3 includes three different color photoresist units, namely a red photoresist unit 31, a green photoresist unit 32, and a blue photoresist unit 33.

As shown in fig. 4 and 5, the projection of the light shielding layer 5 does not cover the pixel electrode branches 421 on both sides of the red photoresist unit 31 and the green photoresist unit 32, and only covers the pixel electrode branches 421 on both sides of the blue photoresist unit 33. The arrangement can effectively improve the problem that the color of the 4-domain large visual angle is bluish.

In this embodiment, the light-shielding layer 5 is a black matrix and/or a source/drain trace.

As shown in fig. 6, in other embodiments, the first wire layer 2 further includes a shielding wire 22, and the shielding wire 22 is located at two sides of the data wire 21. The shielding trace 22 is mainly used for shielding the electric field of the Gate scan line Gate/Data scan line Data, and can also increase the storage capacitance, which is substantially the same as the potential of the common electrode in the actual driving.

In this embodiment, when an angle between a viewing angle and the display panel 100 is 30 ° to 90 °, preferably 40 °, 50 °, and 60 °, the projection of the light shielding layer 5 completely covers at least one pixel electrode branch 421 on both sides of the light blocking unit. When the angle of view and the display panel 100 form an included angle of 30 degrees, the projection of the light shielding layer 5 just completely covers the pixel electrode branches 421 on both sides of at least one light resistance unit; when the angle of view and the display panel 100 form an included angle of 60 degrees, the observed color picture is the purest; when the viewing angle forms an included angle of 90 degrees with the display panel 100, the viewing angle distribution of the viewed picture is most uniform, and the overall effect of the viewed display picture is best.

In this embodiment, the light shielding layer 5 is provided and the light shielding layer 5 is not provided, and the brightness of red, green and blue are respectively tested for comparison analysis and verification, and the results are shown in table 1.

TABLE 1

As can be seen from table 1, when the light-shielding layer 5 is provided, the range of variation between the red luminance and the blue luminance at the viewing angle of 30 ° can be reduced, and the improvement effect on the blue luminance, which is an increase in the blue luminance, is most significant. It is understood that the above measurement is taken as an example of a viewing angle of 30 °, which does not strictly limit the viewing angle range, and the viewing angle is 30 ° to 90 ° from the display panel 100, which has the above improvement effect.

In this embodiment, the display panel 100 further includes a transparent substrate 6 disposed on the light-shielding layer 5. Namely, the light-shielding layer 5 and the transparent substrate 6 are located on the color film substrate.

In this embodiment, the display panel 100 further includes a liquid crystal layer 7 disposed between the substrate 1 and the transparent substrate 6.

Example 2

As shown in fig. 7, the second embodiment includes all the technical features of the first embodiment, and the difference is that the projection of the light shielding layer 5 in the second embodiment does not cover the pixel electrode branches 421 on both sides of the red photoresist unit 31, and covers the pixel electrode branches 421 on both sides of the green photoresist unit 32 and the blue photoresist unit 33. That is, the second embodiment includes the structure shown in fig. 7 in addition to the structures shown in fig. 4 and 5 in the first embodiment, so that the problem that the color of the 4-domain large viewing angle is bluish can be further effectively improved.

Example 3

As shown in fig. 4 and 7, the third embodiment includes most of the technical features of the first embodiment and the second embodiment, and the difference is that the projection of the light shielding layer 5 in the third embodiment does not cover the pixel electrode branches 421 on both sides of the red photoresist unit 31 and the blue photoresist unit 33, and covers the pixel electrode branches 421 on both sides of the green photoresist unit 32. That is, the third embodiment includes the structure shown in fig. 4 in the first embodiment and the structure shown in fig. 7 in the second embodiment, but does not include the structure shown in fig. 5, and this arrangement is effective to improve the problem of greenish color at a large viewing angle of 8 domains.

The present invention has the technical effect of providing a display panel 100, wherein the light shielding layer 5 is disposed above the second routing layer 4, and the projection of the light shielding layer completely covers the pixel electrode branches 421 on both sides of at least one photoresist unit on the color film layer 3. When the light-shielding layer 5 covers the pixel electrode branches 421 on both sides of the blue photoresist unit 33, the problem of bluish color at a large viewing angle in 4 domains can be effectively improved; when the light-shielding layer 5 covers the pixel electrode branches 421 on both sides of the green photoresist unit 32 and the blue photoresist unit 33, the problem that the color of the 4-domain large viewing angle is bluish can be effectively improved; when the light-shielding layer 5 covers the pixel electrode branches 421 on both sides of the green photoresist unit 32, the problem of greenish color with large viewing angle in 8 domains can be effectively improved.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A display panel provided with a pixel region, comprising:

a substrate base plate;

the first wiring layer is arranged on the substrate base plate and comprises data wirings;

the color film layer is arranged on the first wiring layer; the color film layer comprises at least two photoresist units with different colors;

the second wiring layer is arranged on the color film layer; the second routing layer comprises DBS routing and pixel electrodes, the pixel electrodes are provided with a plurality of pixel electrode branches, and the pixel electrode branches are arranged adjacent to the DBS routing; and

and the shading layer is arranged above the second routing layer, and the projection of the shading layer completely covers at least one pixel electrode branch on two sides of the photoresistance unit.

2. The display panel of claim 1, wherein the color film layer comprises three different color photoresist units, namely a red photoresist unit, a green photoresist unit and a blue photoresist unit.

3. The display panel according to claim 2, wherein the projection of the light shielding layer does not cover the pixel electrode branches on both sides of the red photoresist unit and the green photoresist unit, and only covers the pixel electrode branches on both sides of the blue photoresist unit.

4. The display panel according to claim 2, wherein the projection of the light shielding layer does not cover the pixel electrode branches on both sides of the red photoresist unit, and covers the pixel electrode branches on both sides of the green photoresist unit and the blue photoresist unit.

5. The display panel according to claim 2, wherein the projection of the light shielding layer does not cover the pixel electrode branches on both sides of the red photoresist unit and the blue photoresist unit, and covers the pixel electrode branches on both sides of the green photoresist unit.

6. The display panel according to claim 1, wherein the light-shielding layer is a black matrix and/or a source-drain trace.

7. The display panel of claim 1, wherein the first routing layer further comprises shielding traces on both sides of the data traces.

8. The display panel of claim 1, wherein when the viewing angle forms an angle of 30 ° -90 ° with the array substrate, the projection of the light shielding layer completely covers at least one pixel electrode branch on both sides of the light blocking unit.

9. The display panel according to claim 1, further comprising a transparent substrate provided on the light-shielding layer.

10. The display panel according to claim 1, further comprising:

and the liquid crystal layer is arranged between the substrate base plate and the transparent base plate.