CN108919571B

CN108919571B - Display panel

Info

Publication number: CN108919571B
Application number: CN201810758214.3A
Authority: CN
Inventors: 罗勇
Original assignee: Interface Optoelectronics Shenzhen Co Ltd; Interface Technology Chengdu Co Ltd; General Interface Solution Ltd
Current assignee: Interface Optoelectronics Shenzhen Co Ltd; Interface Technology Chengdu Co Ltd; General Interface Solution Ltd
Priority date: 2018-07-11
Filing date: 2018-07-11
Publication date: 2021-07-27
Anticipated expiration: 2038-07-11
Also published as: TW202006445A; TWI675242B; CN108919571A

Abstract

The invention provides a display panel, which comprises a plurality of pixel electrodes, a plurality of pixel electrodes and a plurality of pixel electrodes, wherein the pixel electrodes are formed on a substrate and are mutually spaced; a common electrode layer insulated from the plurality of pixel electrodes; and the first electrode layer comprises a plurality of first electrodes, each first electrode is electrically connected with the common electrode layer, and the impedance of the first electrode layer is smaller than that of the common electrode layer. The display panel comprises the first electrode electrically connected with the common electrode layer, and the impedance of the common electrode layer is greater than that of the first electrode layer, so that the display effect can be improved.

Description

Display panel

Technical Field

The present disclosure relates to display panels, and particularly to a liquid crystal display panel.

Background

A Liquid Crystal Display device is a commonly used flat panel Display device, and a Thin Film Transistor Liquid Crystal Display (TFT-LCD) is a mainstream product in the Liquid Crystal Display device.

An array substrate of a conventional TFT-LCD may include a substrate, wherein a pixel region of the substrate is formed with data lines and scan lines that are crossed and surrounded to define a plurality of pixel units, each pixel unit includes a switching element TFT, a pixel electrode, and a common electrode, and the common electrode may be made of a transparent conductive material, for example: indium Tin oxide (Indium Tin 0 oxides, abbreviated as ITO). However, the resistance of the transparent conductive material is large, which affects the display effect.

Disclosure of Invention

A display panel comprises a plurality of pixel electrodes formed on a substrate and spaced from each other; a common electrode layer insulated from the plurality of pixel electrodes; and the first electrode layer comprises a plurality of first electrodes, each first electrode is electrically connected with the common electrode layer, and the impedance of the first electrode layer is smaller than that of the common electrode layer. The display device comprises the first electrode electrically connected with the common electrode layer, and the impedance of the first electrode layer is smaller than that of the common electrode layer, so that the display effect can be improved.

Drawings

Fig. 1 is a schematic perspective view of a display panel according to a first embodiment of the present invention.

Fig. 2 is a schematic plan view of an array substrate of a display panel according to a first embodiment of the invention.

Fig. 3 is a schematic plan view of a pixel electrode and a black matrix of a display panel according to a first embodiment of the invention.

Fig. 4 is a schematic plan view of a pixel electrode and a first electrode layer of a display panel according to a first embodiment of the invention.

Fig. 5 is a schematic plan view of a pixel electrode and a first electrode of a display panel according to a second embodiment of the invention.

Fig. 6 is a schematic plan view of a pixel electrode and a first electrode of a display panel according to a third embodiment of the invention.

Description of the main elements

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

Referring to fig. 1, fig. 1 is a schematic perspective view of a display panel 100 according to a first embodiment of the invention. As shown in fig. 1, the display panel 100 includes an array substrate 1, a color filter substrate 2, a liquid crystal layer 3 sandwiched between the array substrate 1 and the color filter substrate 2, and a common electrode layer 4 formed on the array substrate 1. In this embodiment, the common electrode layer 4 is a continuous transparent conductive layer. In one embodiment, the transparent conductive layer may be one or more of Indium Tin Oxide (ITO) and Aluminum Zinc Oxide (AZO).

As shown in fig. 1, the display panel 100 further includes a first electrode layer 6, and the first electrode layer 6 is electrically connected to the common electrode layer 4. The impedance of the first electrode layer 6 is smaller than that of the common electrode layer 4, so as to improve the problem of uneven display caused by too large impedance of the common electrode layer 4.

In this embodiment, the first electrode layer 6 is adjacent to the common electrode layer 4, and the first electrode layer 6 is in direct contact with the common electrode layer 4. In other embodiments, an insulating layer may be disposed between the first electrode layer 6 and the common electrode layer 4, and the first electrode layer 6 may be electrically connected to the common electrode layer 4 through an opening penetrating through the insulating layer. Referring to fig. 2, fig. 2 is a schematic plan view of an array substrate 1 according to a first embodiment of the invention. As shown in fig. 2, the array substrate 1 includes a base material 11, and a plurality of scan lines 101 disposed in parallel with each other and a plurality of data lines 102 disposed in parallel with each other and intersecting with the scan lines 101 are disposed on the base material 11.

The scan lines 101 and the data lines 102 are insulated and intersected to define a plurality of pixel units 14. Each pixel unit 14 includes a Thin Film Transistor (TFT) 15 and a pixel electrode 16. The common electrode layer 4 cooperates with the pixel electrodes 16 to form an electric field and is used to drive the liquid crystal molecules 31 in the liquid crystal layer 3 to turn. Each thin film transistor 15 may include a gate electrode 151, a source electrode 152, and a drain electrode 153, and a gate insulating layer and an active layer are further formed between the gate electrode 151 and the source and drain electrodes 152 and 153. In the present embodiment, the gate 151 is electrically connected to the scan line 101, the source 152 is electrically connected to the data line 102, and the drain 153 is electrically connected to the pixel electrode 16.

The scan lines 101 are electrically connected to the first driving circuit 12, and the data lines 102 are electrically connected to the second driving circuit 13. In the present embodiment, the first driving circuit 12 is a data driving circuit, and the second driving circuit 13 may include a multiplexing circuit and a gate driving circuit.

In the present embodiment, the common electrode layer 4 covers each pixel unit 14. A first insulating layer 5 (as shown in fig. 1) is disposed between the common electrode layer 4 and the pixel unit 14, and the first insulating layer 5 is a transparent insulating material. The first electrode layer 6 is located between the pixel electrode 16 and the common electrode layer 4, and the pixel electrode 16 is spaced apart from the first electrode layer 6 by the first insulating layer 5. The first electrode layer 6, the pixel electrode 16, and the common electrode layer 4 are different in distance from the substrate 11 in the thickness direction of the substrate 11 (direction D shown in fig. 1).

Referring to fig. 3, fig. 3 is a schematic plan view of a pixel electrode 16 and a black matrix 21 according to a first embodiment of the invention. In this embodiment, the black matrix 21 is disposed on the color filter substrate 2, that is, the color filter substrate 2 includes the black matrix 21. The black matrix 21 and the pixel electrode 16 are located in different layers, and fig. 3 is a view showing a positional relationship of projections of the black matrix 21 and the pixel electrode 16 in the thickness direction of the substrate 11. Adjacent pixel electrodes 16 are spaced apart by a black matrix 21.

The first electrode layer 6 is located between the black matrix 21 and the pixel electrode 16, the first electrode layer 6 is disposed corresponding to the black matrix 21, and a projection of the first electrode layer 6 in the thickness direction of the substrate 11 overlaps a projection of the black matrix 21 in the thickness direction of the substrate 11, so as to avoid affecting the display effect of the display panel 100.

In the present embodiment, the thin film transistor 15, the scan line 101, and the data line 102 are disposed corresponding to the black matrix 21, and the thin film transistor 15, the scan line 101, and the data line 102 are all shielded by the black matrix 21 to avoid affecting the display effect of the display panel 100.

In the present embodiment, the first electrode layer 6 is a metal, and may be selected from at least one of aluminum (Al), silver (Ag), gold (Au), cobalt (Co), chromium (Cr), copper (Cu), indium (In), manganese (Mn), molybdenum (Mo), nickel (Ni), neodymium (Nd), palladium (Pd), platinum (Pt), titanium (Ti), tungsten (W), and zinc (Zn). In the present embodiment, the first electrode layer 6 is copper (Cu).

Referring to fig. 4, fig. 4 is a schematic plan view of the pixel electrode 16 and the first electrode layer 6 of the display panel 100 according to the first embodiment of the invention. As shown in fig. 4, the first electrode layer 6 includes a plurality of first electrodes 61. In the present embodiment, the plurality of first electrodes 61 are disposed to be spaced apart from each other. The plurality of first electrodes 61 spaced apart from each other include various shapes.

As shown in fig. 4, in the present embodiment, a plurality of pixel electrodes 16 spaced apart from each other are arranged in a matrix in a plurality of rows and columns. The plurality of pixel electrodes 16 spaced apart from each other form a plurality of rows of pixel electrodes 16 arranged in a first direction (e.g., X direction in the figure), and the plurality of pixel electrodes 16 spaced apart from each other form a plurality of columns of pixel electrodes 16 arranged in a second direction (e.g., Y direction in the figure), the first direction intersecting the second direction.

A first gap 71 is formed between two adjacent rows of pixel electrodes 16, a second gap 72 is formed between two adjacent columns of pixel electrodes 16, and the first gap 71 and the second gap 72 intersect. The peripheries of the plurality of pixel electrodes 16 spaced apart from each other are also formed with a first gap 71 and a second gap 72 which are not located between two adjacent pixel electrodes 16.

In one embodiment, a projection of a portion of the at least one first gap 71 in the thickness direction of the substrate 11 overlaps a projection of the at least one first electrode 61 in the thickness direction of the substrate 11, and a projection of the other portion in the thickness direction of the substrate 11 does not overlap a projection of the first electrode 61 in the thickness direction of the substrate 11; a projection of a portion of the at least one second gap 72 in the thickness direction of the substrate 11 overlaps a projection of the at least one first electrode 61 in the thickness direction of the substrate 11, and a projection of the other portion in the thickness direction of the substrate 11 does not overlap a projection of the first electrode 61 in the thickness direction of the substrate 11.

As shown in fig. 4, in the present embodiment, the plurality of first electrodes 61 spaced apart from each other includes at least one first sub-electrode 611, at least one second sub-electrode 612, and at least one third sub-electrode 613. The first sub-electrode 611, the second sub-electrode 612, and the third sub-electrode 613 are each different in shape.

As shown in fig. 4, each of the first sub-electrodes 611 is polygonal, and a projection of each of the first sub-electrodes 611 in the thickness direction of the substrate 11 overlaps a projection of one of the first gaps 71 or one of the second gaps 72 in the thickness direction of the substrate 11. In the present embodiment, the at least one first sub-electrode 611 has a parallelogram shape, and the at least one first sub-electrode 611 has a hexagonal shape similar to the shape of at least a portion of the first gap 71.

As shown in fig. 4, each of the second sub-electrodes 612 has a substantially "V" shape. The projection of each second sub-electrode 612 in the thickness direction of the substrate 11 overlaps the projection of one first gap 71 and the adjacent one second gap 72 in the thickness direction of the substrate 11.

As shown in fig. 4, each of the third sub-electrodes is substantially "T" shaped. A projection of each of the third sub-electrodes 613 in the thickness direction of the substrate 11 overlaps a projection of one of the first gaps 71 and an adjacent one of the second gaps 72 in the thickness direction of the substrate 11.

In this embodiment, the plurality of first electrodes 61 are made of copper, and since the copper reflects red light and absorbs blue light and green light, the irregular arrangement of the plurality of first electrodes 61 can improve the color shift phenomenon of the display panel 100 caused by the reflection of the first electrodes 61, thereby improving the color uniformity of the display screen at different angles.

For convenience of description, in the following embodiments, elements having similar structures and functions to those of the first embodiment are denoted by the same reference numerals.

Referring to fig. 5, fig. 5 is a schematic plan view of a pixel electrode 16 and a first electrode layer 6 of a display panel 100 according to a second embodiment of the invention. The display panel 100 of the present embodiment has substantially the same structure as the display panel 100 of the first embodiment, except that: in the present embodiment, the plurality of first electrodes 61 includes a plurality of fourth sub-electrodes 614 spaced apart from each other at the center of the display panel 100 and a plurality of fifth sub-electrodes 615 spaced apart from each other at the periphery 100 of the panel. The fourth sub-electrode 614 and the fifth sub-electrode 615 are different in shape from each other.

In the present embodiment, a projection of each of the fourth sub-electrodes 614 portion in the thickness direction of the substrate 11 overlaps with projections of two first gaps 71 adjacent in the second direction and a second gap 72 located between the two first gaps 71 in the thickness direction of the substrate 11. In an embodiment, a projection of each of the fourth sub-electrodes 614 in the thickness direction of the substrate 11 overlaps projections of two second gaps 72 adjacent in the first direction and a first gap 71 located between the two second gaps 72 in the thickness direction of the substrate 11.

In this embodiment, each of the fourth sub-electrodes 614 includes a first portion 601, a second portion 602, and a third portion 603, and the first portion 601, the second portion 602, and the third portion 603 are electrically connected. The first portion 601 and the third portion 603 extend in different directions along both ends of the second portion 602, respectively.

In the present embodiment, a projection of each first portion 601 in the thickness direction of the substrate 11 at least partially overlaps a projection of the first gap 71 in the thickness direction of the substrate 11, a projection of each third portion 603 in the thickness direction of the substrate 11 at least partially overlaps a projection of the first gap 71 in the thickness direction of the substrate 11, and a projection of each second portion 602 at least partially overlaps a projection of the second gap 72 in the thickness direction of the substrate 11.

In the extending direction of the second gap 72, two adjacent second portions 602 are spaced by one pixel electrode 16, and the distance between two adjacent second portions 602 is the distance that one pixel electrode 16 is parallel to one side of the second gap 72.

The projection of each fifth sub-electrode 615 in the thickness direction of the substrate 11 overlaps the projection of one first gap 71 and the adjacent second gap 72 in the thickness direction of the substrate 11. Each of the second sub-electrodes 612 has a substantially "V" shape.

Referring to fig. 6, fig. 6 is a schematic plan view of a pixel electrode 16 and a first electrode layer 6 of a display panel 100 according to a third embodiment of the invention. The display panel 100 of the present embodiment has substantially the same structure as the display panel 100 of the first embodiment, except that: in the present embodiment, the plurality of first electrodes 61 are irregularly arranged in the display panel 100, and a projection of the plurality of first electrodes 61 in the thickness direction of the substrate 11 surrounds a portion of the pixel electrode 16.

The projection of each first electrode 61 in the thickness direction of the substrate 11 randomly surrounds one pixel electrode 16, and not all the pixel electrodes 16 are surrounded by the projection of the first electrode 61 in the thickness direction of the substrate 11.

In the present embodiment, each of the first electrodes 61 has the same shape, a projection of each of the first electrodes 61 in the thickness direction of the substrate 11 is in a frame shape surrounding its corresponding pixel electrode 16, and a projection of each of the first electrodes 61 in the thickness direction of the substrate 11 overlaps with projections of two adjacent first gaps 71 and two adjacent second gaps 72 in the thickness direction of the substrate 11.

Although the common electrode layer 4 and the first electrode layer 6 in the above embodiments are both formed on the array substrate 1. However, in other embodiments, the common electrode layer 4 and the first electrode layer 6 may be formed on the color filter substrate 2 and disposed corresponding to the black matrix 21.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims

1. A display panel, comprising:

a plurality of pixel electrodes formed on the substrate and spaced apart from each other;

a common electrode layer insulated from the plurality of pixel electrodes; and

a first electrode layer comprising a plurality of first electrodes, each first electrode electrically connected to the common electrode layer,

wherein the impedance of the first electrode layer is less than the impedance of the common electrode layer;

the pixel electrodes are arranged in a matrix at intervals to form a plurality of rows and a plurality of columns, a first gap is formed between every two adjacent rows of pixel electrodes, a second gap is formed between every two adjacent columns of pixel electrodes, and the first gap is intersected with the second gap; the projections of the plurality of first electrodes in the thickness direction of the substrate at least partially overlap with the projections of at least one of the first gaps and the second gaps in the thickness direction of the substrate at least partially;

the plurality of first electrodes are spaced apart from one another, the plurality of first electrodes comprising a plurality of shapes; the plurality of first electrodes are irregularly arranged among the plurality of pixel electrodes.

2. The display panel of claim 1, wherein: the first electrode layer, the plurality of pixel electrodes and the common electrode layer are different in distance from the substrate in the thickness direction of the substrate, and the projection of each first electrode in the thickness direction of the substrate is not overlapped with the projection of the plurality of pixel electrodes in the thickness direction of the substrate.

3. The display panel of claim 1, wherein: the display panel also comprises a black matrix, and adjacent pixel electrodes are spaced by the black matrix; each first electrode is arranged corresponding to the black matrix.

4. The display panel of claim 1, wherein: the projections of the plurality of first electrodes in the thickness direction of the substrate surround part of the pixel electrodes.

5. The display panel of claim 1, wherein: the projection of the at least one first electrode in the thickness direction of the substrate overlaps only the projection of one first gap or one second gap in the thickness direction of the substrate.

6. The display panel of claim 1, wherein: a projection of the at least one first electrode in the thickness direction of the substrate overlaps with a projection of the at least one first gap and the at least one second gap in the thickness direction of the substrate.

7. The display panel of claim 1, wherein: the display panel comprises an array substrate, and the plurality of pixel electrodes, the common electrode layer and the plurality of first electrodes are all formed on the array substrate.