CN110780493A

CN110780493A - Display device

Info

Publication number: CN110780493A
Application number: CN201911075002.6A
Authority: CN
Inventors: 杨舜臣; 林映彤; 徐毓伦
Original assignee: Innolux Display Corp
Current assignee: Innolux Corp
Priority date: 2014-12-15
Filing date: 2014-12-15
Publication date: 2020-02-11
Anticipated expiration: 2034-12-15
Also published as: CN110780493B; CN105785670A; CN105785670B

Abstract

The invention discloses a display device, which comprises an array substrate, wherein the array substrate comprises: a substrate; the first electrode is arranged on the substrate and provided with an opening, and the opening is provided with an edge in the extending direction parallel to the grid line; and a second electrode disposed on the first electrode, wherein the second electrode includes: the first finger part is provided with a first side and a second side opposite to the first side, wherein the first outer edge of the first finger part forms an acute angle with the extending direction of the gate line on the first side, and the second outer edge of the first finger part forms an obtuse angle with the extending direction of the gate line on the second side; and a connecting portion connecting the first finger portion at an edge; the connecting part is provided with a first concave edge (concave) on the first side, a second concave edge on the second side, and the side length of the first concave edge is larger than that of the second concave edge. The display device also comprises an opposite substrate and a display medium.

Description

Display device

The application is a divisional application of a Chinese invention patent application (application number: 201410778244.2, application date: 2014, 12 and 15, invention name: display device).

Technical Field

The present invention relates to a display device with an array substrate, and more particularly, to a display device with electrodes having concave edges.

Background

Liquid crystal display devices have been widely used in recent years for display elements of various products. The liquid crystal display device controls the penetration amount of light by utilizing the characteristic that liquid crystal molecules have different polarization or refraction effects on the light under different arrangement states, so that the liquid crystal display device can generate images. Conventional Twisted Nematic (TN) liquid crystal display devices have very good transmission characteristics, but are affected by the structure and optical characteristics of liquid crystal molecules, and have a very narrow viewing angle.

In order to solve this problem, there have been developed various types of wide viewing angle liquid crystal display devices, such as In-Plane Switching (IPS) liquid crystal display devices and Fringe-Field Switching (FFS) liquid crystal display devices. However, in the above display device, the inversion of a small portion of the liquid crystal molecules is different from the inversion of a large portion of the liquid crystal molecules, which reduces the liquid crystal efficiency and reduces the luminance of the liquid crystal panel during display. In addition, a small part of the liquid crystal molecules with different inversions may cause dark fringe areas on the display screen, or when external force (such as finger touch) contacts the display screen, a small part of the liquid crystal molecules with different inversions may be disturbed to cause unnecessary bright fringe areas on the display screen, thereby deteriorating display quality.

Therefore, there is a need for a display device that can further reduce the number of liquid crystal molecules with different inversion directions.

Disclosure of Invention

To solve the above problems, the present invention provides a display device including: an array substrate, comprising: a substrate; the first electrode is arranged on the substrate and provided with an opening, and the opening is provided with an edge in the extending direction parallel to the grid line; and a second electrode disposed on the first electrode, wherein the second electrode includes: the first finger part is provided with a first side and a second side opposite to the first side, wherein the first outer edge of the first finger part and the extending direction of the gate line form an acute angle, and the second outer edge of the first finger part and the extending direction of the gate line form an obtuse angle; the connecting part is connected with the first finger part at the edge, the adjacent edge of the connecting part has a first width in the extending direction of the gate line, the far edge of the connecting part has a second width in the extending direction of the gate line, and the first width is smaller than the second width; the connecting part is provided with a first concave edge (concave) on the first side, a second concave edge on the second side, and the side length of the first concave edge is greater than that of the second concave edge; an opposite substrate; and the display medium is arranged between the array substrate and the opposite substrate.

The present invention further provides a display device, comprising: an array substrate, comprising: a substrate; the first electrode is arranged on the substrate and provided with an opening, and the opening is provided with an edge in the extending direction parallel to the grid line; and a second electrode disposed on the first electrode, wherein the second electrode includes: the first finger part is provided with a first side and a second side opposite to the first side, wherein the first outer edge of the first finger part and the extending direction of the gate line form an acute angle, and the second outer edge of the first finger part and the extending direction of the gate line form an obtuse angle; the connecting part is connected with the first finger part at the edge, the adjacent edge of the connecting part has a first width in the extending direction of the gate line, the far edge of the connecting part has a second width in the extending direction of the gate line, and the first width is smaller than the second width; the connecting part is provided with a first inflection point at the first side and a second inflection point at the second side, wherein the distance from the first inflection point to the edge is greater than the distance from the second inflection point to the edge in the direction vertical to the extending direction of the gate line; an opposite substrate; and the display medium is arranged between the array substrate and the opposite substrate.

The present invention also provides a display device including: an array substrate, comprising: a substrate; the first electrode is arranged on the substrate and provided with an opening, and the opening is provided with an edge in the extending direction parallel to the grid line; and a second electrode disposed on the first electrode, wherein the second electrode includes: the first finger part is provided with a first side and a second side opposite to the first side, wherein the first outer edge of the first finger part and the extending direction of the gate line form an acute angle, and the second outer edge of the first finger part and the extending direction of the gate line form an obtuse angle; the connecting part is connected with the first finger part at the edge, the adjacent edge of the connecting part has a first width in the extending direction of the gate line, the far edge of the connecting part has a second width in the extending direction of the gate line, and the first width is smaller than the second width; wherein the connecting portion has a first concave edge (concave) on the first side and a second concave edge on the second side, and the distance from the most concave point of the first concave edge to the edge is greater than the distance from the most concave point of the second concave edge to the edge in the direction perpendicular to the extending direction of the gate line; an opposite substrate; and the display medium is arranged between the array substrate and the opposite substrate.

In order to make the features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1A is a top view of an array substrate according to an embodiment of the invention;

FIG. 1B is a cross-sectional view of the array substrate taken along line 1B-1B of FIG. 1A;

FIG. 2 is a partially enlarged view of the array substrate of FIG. 1A;

fig. 3A is a partially enlarged view of the array substrate of fig. 2;

fig. 3B is a partially enlarged view of the array substrate of fig. 2;

fig. 3C is a partially enlarged view of the array substrate of fig. 2;

fig. 3D is a partially enlarged view of the array substrate of fig. 2;

FIG. 4 is a top view and a partially enlarged view of an array substrate according to another embodiment of the present invention;

fig. 5 is a cross-sectional view of a display device according to an embodiment of the present invention.

Description of the symbols

100 array substrate;

102 sub-pixels;

104 a substrate;

106 a first electrode;

108 a second electrode;

110 data lines;

112 gate lines;

114 an insulating layer;

116 a first finger;

116E1 first outer edge;

116E2 second outer edge;

118 a connection portion;

120, opening a hole;

120S edge;

a 120E extension line;

122A first concave edge;

122B second recessed edge;

124A first endpoint;

124AE extension line;

124B second endpoint;

124BE extension line;

126T upper part;

126B lower part;

128A first line segment;

128B second line segment;

128 line segments;

130 center of curvature;

132 center of curvature;

134A first inflection point;

a 134AE extension line;

134B second inflection point;

134BE extension line;

136A, a most concave point;

136AE extension line;

136B, the most concave point;

136BE extension line;

138A line segment;

138B line segment;

139A upper end point;

139B upper endpoint;

140A first side edge;

140AE extension lines;

140B second side edge;

140BE extension lines;

142A intersection point;

142B intersection point;

point 144A;

144AE line segment;

144B point;

144BE line segments;

146A intersection point;

146B intersection point;

148A first side;

148B second side;

150A first region;

150B a second region;

152 a second finger;

154 slanted slits;

200 a display device;

202 opposite to the substrate;

204 display medium;

300 area;

A1E extension line;

an angle theta 1;

a theta 2 angle;

a theta 3 angle;

theta 4 angle;

the X1 distance;

the X2 distance;

the Y1 distance;

the Y2 distance;

the distance D1;

the distance D2;

the distance D3;

the distance D4;

the distance D5;

the distance D6;

l1 side length;

l2 side length;

l3 length;

l4 length;

a first width W1;

w2 second width;

s1 first side;

a second side of S2;

outside of S3;

inside of S4;

v through holes;

1B-1B line segment;

a1 gate line extension direction;

a2 is perpendicular to the direction of the gate line extension direction.

Detailed Description

The array substrate and the display panel having the same according to the present invention will be described in detail below. It is to be understood that the following description provides many different embodiments, or examples, for implementing different aspects of the invention. The specific elements and arrangements described below are provided as a brief description of the invention. These are, of course, merely examples and are not intended to be limiting. Moreover, repeated reference numerals or designations may be used in various embodiments. These iterations are merely for simplicity and clarity of describing the present invention, and are not intended to represent any correlation between the various embodiments and/or structures discussed. Furthermore, when a first material layer is located on or above a second material layer, the first material layer and the second material layer are in direct contact. Alternatively, one or more further layers of material may be provided, in which case there may not be direct contact between the first and second layers of material.

It is to be understood that the elements specifically described and illustrated may exist in various forms well known to those skilled in the art. Further, when a layer is "on" another layer or a substrate, it may mean "directly on" the other layer or the substrate, or that the layer is on the other layer or the substrate, or that the other layer is interposed between the other layer and the substrate.

In addition, relative terms, such as "lower" or "bottom" and "upper" or "top," may be used in the embodiments to describe one element's relative relationship to another element as illustrated. It will be understood that if the device shown in the drawings is turned over with its top and bottom reversed, elements described as being on the "lower" side will be turned over to elements on the "higher" side.

As used herein, the terms "about" and "approximately" generally mean within 20%, preferably within 10%, and more preferably within 5% of a given value or range. The quantities given herein are approximate quantities, meaning that the meanings of "about" and "approximately" are implied unless otherwise indicated.

The embodiment of the invention increases the concave edge of the pixel electrode on the specific side edge to reduce the number of liquid crystal molecules with the reverse direction different from most liquid crystal molecules, so as to increase the liquid crystal efficiency and reduce a bright-line area or a dark-line area.

Referring to fig. 1A and 1B, fig. 1A is a top view of an array substrate 100 according to an embodiment of the invention, and fig. 1B is a cross-sectional view of the array substrate 100 along line 1B-1B of fig. 1A. The array substrate 100 may be a transistor substrate having a transistor array, such as a thin film transistor substrate. In addition, as shown in fig. 1A, the array substrate 100 has a plurality of sub-pixels 102, and as shown in fig. 1B, the array substrate 100 includes a base 104, a first electrode 106 disposed on the base 104, and a second electrode 108 disposed on the first electrode 106. It should be noted that, as can be seen from fig. 1B, the first electrode 106 and the second electrode 108 are disposed on different planes, so that the first electrode 106 and the second electrode 108 shown in fig. 1A are drawings that project the two electrodes onto the same plane.

In detail, the substrate 104 may be a transparent substrate, such as a glass substrate, a ceramic substrate, a plastic substrate, or any other suitable transparent substrate. In addition, the substrate 104 further includes a data line 110, a gate line 112 (shown in fig. 1A, but not shown in fig. 1B), and the transistor (not shown). The data line 110 is used for providing a source signal to the sub-pixel 102, and the gate line 112 is used for providing a scan pulse signal to the sub-pixel 102 and controlling the sub-pixel 102 in cooperation with the source signal. In addition, the gate line 112 extends along a direction a1, and a direction substantially perpendicular (perpendicular) or orthogonal (orthogonal) to the gate line extending direction a1 is a direction a 2.

In addition, the first electrode 106 and the second electrode 108 may each independently include a transparent conductive material, such as Indium Tin Oxide (ITO) Tin Oxide (TO), Indium Zinc Oxide (IZO), Indium Gallium Zinc Oxide (IGZO), Indium Tin Zinc Oxide (ITZO), Antimony Tin Oxide (ATO), Antimony Zinc Oxide (AZO), a combination thereof, or any other suitable transparent conductive oxide material. In the embodiment shown in fig. 1B, the first electrode 106 is a common electrode (common electrode), and the second electrode 108 is a pixel electrode (pixel electrode). In addition, the first electrode 106, which is a common electrode, is disposed in the entire area of the sub-pixel 102 and has an opening 120. An insulating layer 114 is disposed between the first electrode 106 and the second electrode 108, and the insulating layer 114 is filled in the opening 120 of the first electrode 106. The material of the insulating layer 114 may be silicon oxide, silicon nitride, silicon oxynitride, combinations thereof, or any other suitable material.

In addition, as shown in fig. 1B, a through hole V is disposed in a region of the insulating layer 114 corresponding to the opening 120, so that the second electrode 108 serving as a pixel electrode is electrically connected to the data line 110 (not shown) in the substrate 104 through the through hole V. In other words, as shown in the top view of fig. 1A, the via V is disposed in the opening 120. In addition, the insulating layer 114 can electrically insulate the first electrode 106 from the second electrode 108, so that a capacitor can be formed between the first electrode 106 and the second electrode 108.

Next, referring to fig. 2, which is an enlarged view of one of the second electrodes 108 as a pixel electrode of the array substrate 100 of fig. 1A. As shown in fig. 2, the second electrode 108 as a pixel electrode includes a first finger portion 116 and a connection portion 118. In addition, the opening 120 has an edge 120S parallel to the gate line extending direction a 1. In detail, the edge 120S is an edge of the opening 120 parallel to the gate line extending direction a1 and closer to the first finger 116 (i.e., a thick line indicated by the reference numeral 120S). In addition, the first finger 116 and the connecting portion 118 may be connected substantially at the edge 120S. In addition, the extension line 120E refers to a line segment parallel to the gate line extension direction a1 and substantially overlapping the edge 120S.

As shown in fig. 2, the first finger 116 has a first side S1 and a second side S2 opposite to the first side S1, and the first outer edge 116E1 of the first finger 116 forms an acute angle θ 1 with the gate line extending direction a1 (e.g., the direction of the extending line 120E) at the first side S1, and the second outer edge 116E2 of the first finger 116 forms an obtuse angle θ 2 with the gate line extending direction a1 (e.g., the direction of the extending line 120E) at the second side S2. In other words, the first side S1 is a side where the first finger 116 and the connecting portion 118 are connected, the first outer edge 116E1 of the first finger 116 and the gate line extending direction a1 (e.g., the direction of the extending line 120E) form an acute angle θ 1, and the second side S2 is a side where the first finger 116 and the connecting portion 118 are connected, the second outer edge 116E2 of the first finger 116 and the gate line extending direction a1 (e.g., the direction of the extending line 120E) form an obtuse angle θ 2.

Next, referring to fig. 3A, fig. 3A is an enlarged view of the connecting portion 118 and a portion of the first finger 116 of fig. 2, i.e., an enlarged view of the area 300 in fig. 2. As shown in fig. 3A, the connecting portion 118 has a first width W1 in the gate line extending direction a1 adjacent to the edge 120S, and the connecting portion 118 has a second width W2 in the gate line extending direction a1 away from the edge 120S, wherein the first width W1 is smaller than the second width W2.

In detail, the connecting portion 118 includes an upper portion 126T closer to the edge 120S and a lower portion 126B farther from the edge 120S, wherein the upper portion 126T has the first width W1 in the gate line extending direction a1, and the lower portion 126B has the second width W2 in the gate line extending direction a 1.

The upper portion 126T and the lower portion 126B of the connecting portion 118 are defined as follows. The connecting portion 118 has a first concave edge (concave)122A on the first side S1 and a second concave edge 122B on the second side S2. The first recessed edge 122A has a first end 124A away from the edge 120S, and the second recessed edge 122B also has a second end 124B away from the edge 120S. An extension line is formed along the gate line extending direction a1 with reference to the end of the first end 124A and the second end 124B farther from the edge 120S, such as the first end 124A farther from the edge 120S in fig. 3A as the extension line 124AE, and the extension line 124AE is parallel to the gate line extending direction a1 and passes through the first end 124A. This extension line (e.g., extension line 124AE) divides connecting portion 118 into two portions, with the portion closer to edge 120S being upper portion 126T and the portion further from edge 120S being lower portion 126B.

In addition, the first width W1 is a width between the first concave edge 122A and the second concave edge 122B of the upper portion 126T in the gate line extending direction a1, and the second width W2 is a width between two opposite edges of the lower portion 126B in the gate line extending direction a 1.

Furthermore, the first concave edge 122A and the second concave edge 122B of the connecting portion 118 are only disposed on the upper portion 126T of the connecting portion 118, but not disposed on the lower portion 126B of the connecting portion 118.

With reference to fig. 3A, in the connecting portion 118 of the present invention, the length L1 of the first concave edge 122A (i.e. the length of the thick line denoted by the symbol L1 in fig. 3A) is greater than the length L2 of the second concave edge 122B (i.e. the length of the thick line denoted by the symbol L2 in fig. 3A), which can reduce the number of liquid crystal molecules that fall in different directions from most of the liquid crystal molecules, thereby increasing the liquid crystal efficiency and reducing the brightness unevenness affecting the display quality.

In detail, the present invention uses the first outer edge 116E1 of the first finger 116 as the first side S1 at the connection position of the first finger 116 and the connecting portion 118 and the gate line extending direction a1, and the inventor found that the portion of the connecting portion 118 located at the first side S1 causes a portion of the liquid crystal molecules located at the first side S1 to have a different inversion direction from most of the liquid crystal molecules, thereby causing brightness unevenness of display quality and reducing liquid crystal efficiency. Since the side length L1 of the first concave edge 122A is greater than the side length L2 of the second concave edge 122B, the area of the portion of the connecting portion 118 located at the first side S1 can be substantially reduced, and the number of liquid crystal molecules located at the first side S1 and having different inversion directions from most of the liquid crystal molecules can be reduced. The reduction of the number of the liquid crystal molecules at the first side S1, which are inverted to be different from most of the liquid crystal molecules, can increase the liquid crystal efficiency to increase the brightness of the liquid crystal panel during displaying, and can reduce the brightness unevenness of the display quality to improve the display quality. For example, in one embodiment, the liquid crystal efficiency of the liquid crystal molecules corresponding to the region of the first concave edge 122A of the first side S1 can be increased from 20% to 23%.

Further, in the connection portion 118 of the present invention, a distance D1 from the first end 124A of the first concave edge 122A to the edge 120S may be greater than a distance D2 from the second end 124B of the second concave edge 122B to the edge 120S.

In detail, in fig. 3A, the extension line 124AE refers to a line segment parallel to the gate line extension direction a1 and passing through the first end point 124A. The distance D1 from the first end 124A to the edge 120S is the distance from the extension line 124AE to the extension line 120E in the direction a2 perpendicular to the gate line extension direction a 1. Similarly, the extension line 124BE is a line segment parallel to the gate line extending direction a1 and passing through the second end 124B, and the distance D2 from the second end 124B to the edge 120S is a distance from the extension line 124BE to the extension line 120E in a direction a2 perpendicular to the gate line extending direction a 1.

As shown in fig. 3A, the distance D1 being greater than the distance D2 indicates that the area of the portion of the connecting portion 118 on the first side S1 is smaller than the area of the portion of the connecting portion 118 on the second side S2, so that the number of liquid crystal molecules on the first side S1 that fall in a different direction from most of the liquid crystal molecules can be reduced, the liquid crystal efficiency can be increased, the brightness of the liquid crystal panel can be increased during displaying, and the brightness unevenness can be reduced to improve the display quality.

Next, referring to fig. 3B, the connecting portion 118 and a portion of the first finger 116 are shown as in fig. 3A. The connecting portion 118 and a portion of the first finger 116 are illustrated in another duplicated figure 3B to more clearly illustrate the technical features of the present invention. As shown in fig. 3B, the connecting portion 118 has a first inflection point 134A on the first side S1 and a second inflection point 134B on the second side S2, and a distance D3 from the first inflection point 134A to the edge 120S is greater than a distance D4 from the second inflection point 134B to the edge 120S in a direction a2 perpendicular to the gate line extending direction a 1. This feature can further reduce the number of liquid crystal molecules having different inversion directions from most of the liquid crystal molecules, thereby increasing the liquid crystal efficiency and reducing the brightness unevenness of the display quality.

In detail, the point of inflection refers to a point at which the center of curvature of the side edge on the concave side of the curve changes from one side of the curve to the other side of the curve. Taking the side of the connecting portion 118 on the first side S1 as an example, the portion of the side closer to the edge 120S has a first line segment 128A (i.e., the thick line indicated by the reference numeral 128A in fig. 3B) notched toward the outer side S3 of the connecting portion 118, and the portion of the side farther from the edge 120S has a second line segment 128B (i.e., the thick line indicated by the reference numeral 128B in fig. 3B) notched toward the inner side S4 of the connecting portion 118. The first segment 128A and the second segment 128B form the segment 128. The inner side S4 is opposite to the outer side S3, i.e., the outer side S3 and the inner side S4 are opposite sides of the line segment 128. Further, the center of curvature (center of curvature) refers to the center of a circle that is tangent to a point on a curve and has the same radius of curvature as the point. In other words, the center of curvature refers to a point on the curve that extends from a point along a tangential direction perpendicular to the point, a distance of the radius of curvature of the point into the concave edge.

As shown in fig. 3B, the first line segment 128A and the second line segment 128B are both curved, and the center of curvature (e.g., the center of curvature 130) of any point on the first line segment 128A is located on the outer side S3 of the first line segment 128A (or the line segment 128), and the center of curvature (e.g., the center of curvature 132) of any point on the second line segment 128B is located on the inner side S4 of the second line segment 128B (or the line segment 128). The connecting portion 118 includes a point at which the center of curvature of the side of the line segment 128 changes from the outer side S3 to the inner side S4, which is the first point 134A of inflection of the side. In addition, the first inflection point 134A is also a connection point of the first line 128A and the second line 128B. Similarly, the second inflection point 134B of the connection portion 118 on the second side S2 is also defined in the same manner.

Further, the extension line 134AE refers to a line segment parallel to the gate line extension direction a1 and passing through the first inflection point 134A. The distance D3 from the first inflection point 134A to the edge 120S is the distance from the extension line 134AE to the extension line 120E in the direction a2 perpendicular to the gate line extension direction a 1. Similarly, the extension line 134BE is a line segment parallel to the gate line extending direction a1 and passing through the second inflection point 134B, and the distance D4 from the second inflection point 134B to the edge 120S is a distance from the extension line 134BE to the extension line 120E in a direction a2 perpendicular to the gate line extending direction a 1.

As shown in fig. 3B, the distance D3 from the first inflection point 134A to the edge 120S of the connection portion 118 is greater than the distance D4 from the second inflection point 134B to the edge 120S, which means that the area of the portion of the connection portion 118 on the first side S1 is smaller than the area of the portion of the connection portion 118 on the second side S2, so that the number of liquid crystal molecules having the same direction of inversion as that of the majority of liquid crystal molecules on the first side S1 can be reduced, thereby increasing the liquid crystal efficiency and increasing the brightness of the liquid crystal panel during displaying, and reducing the uneven brightness to improve the display quality.

Next, referring to fig. 3C, the same connecting portion 118 and a portion of the first finger 116 as those shown in fig. 3A and 3B are shown. The connecting portion 118 and a portion of the first finger 116 are illustrated in another duplicated figure 3C to more clearly illustrate the features of the present invention. As shown in fig. 3C, in a direction a2 perpendicular to the gate line extending direction a1, a distance D5 from the most concave point 136A of the first concave edge 122A to the edge 120S of the connection portion 118 is greater than a distance D6 from the most concave point 136B of the second concave edge 122B to the edge 120S. This feature can further reduce the number of liquid crystal molecules having different inversion directions from most of the liquid crystal molecules, thereby increasing the liquid crystal efficiency and reducing the brightness unevenness of the display quality.

In detail, the line segment 138A is a connection between the first end 124A of the first concave edge 122A far from the edge 120S and the upper end 139A of the first concave edge 120S, and the most concave point 136A of the first concave edge 122A is a point on the first concave edge 122A having the largest vertical distance to the line segment 138A in a direction perpendicular to the line segment 138A. Similarly, the line segment 138B is a connection between the second end 124B of the second concave edge 122B far from the edge 120S and the upper end 139B of the second concave edge 120S, and the most concave point 136B of the second concave edge 122B is a point on the second concave edge 122B having the largest vertical distance from the line segment 138B in the direction perpendicular to the line segment 138B.

Further, the extension line 136AE refers to a line segment parallel to the gate line extension direction a1 and passing through the most concave point 136A of the first concave edge 122A. The distance D5 from the most concave point 136A of the first concave edge 122A to the edge 120S is the distance from the extension line 136AE to the extension line 120E in the direction a2 perpendicular to the gate line extension direction a 1. Similarly, the extending line 136BE refers to a line segment parallel to the gate line extending direction a1 and passing through the second concave edge 122B, and the distance D6 from the concave point 136B to the edge 120S of the second concave edge 122B refers to the distance from the extending line 136BE to the extending line 120E in the direction a2 perpendicular to the gate line extending direction a 1.

As shown in fig. 3C, the distance D5 between the most concave point 136A of the first concave edge 122A of the connection portion 118 and the edge 120S is greater than the distance D6 between the most concave point 136B of the second concave edge 122B and the edge 120S, which means that the area of the portion of the connection portion 118 on the first side S1 is smaller than the area of the portion of the connection portion 118 on the second side S2, so that the number of liquid crystal molecules on the first side S1, which are different from most of the liquid crystal molecules in the reverse direction, can be reduced, the liquid crystal efficiency can be increased, the brightness of the liquid crystal panel can be increased during displaying, and the brightness unevenness can be reduced to improve the display quality.

Next, referring to fig. 3D, the connecting portion 118 and a portion of the first finger 116 are shown as in fig. 3A, 3B and 3C. The connecting portion 118 and a portion of the first finger 116 are illustrated in another duplicated figure 3D to more clearly illustrate the features of the present invention. As shown in fig. 3D, the connecting portion 118 has a first side edge 140A connected to the first concave edge 122A on the first side S1, and the connecting portion 118 has a second side edge 140B connected to the second concave edge 122B on the second side S2. The absolute value of the slope of the first side edge 140A is different from the absolute value of the slope of the second side edge 140B with respect to the gate line extending direction a 1. In addition, in an embodiment, the absolute value of the slope of the first side edge 140A is smaller than the absolute value of the slope of the second side edge 140B. This feature can further reduce the number of liquid crystal molecules having different inversion directions from most of the liquid crystal molecules, thereby increasing the liquid crystal efficiency and reducing the brightness unevenness of the display quality.

In the embodiment shown in fig. 3D, the first side edge 140A of the connecting portion 118 intersects the gate line extending direction a1 at an angle θ 3 different from 90 degrees, and the second side edge 140B intersects the gate line extending direction a1 at an angle θ 4 different from 90 degrees. The absolute value of the slope of the first edge 140A, the absolute value of the slope of the second edge 140B, the intersection angle θ 3 and the intersection angle θ 4 can be defined by the first edge 140A, the second edge 140B and any line segment parallel to the gate line extending direction A1 (e.g., the extending line A1E).

In detail, the extension line 140AE of the first side edge 140A intersects the extension line A1E at the intersection point 142A. And line segment 144AE refers to a line segment parallel to direction a2 and passing through point 144A on first side edge 140A, and line segment 144AE intersects extension line A1E at intersection point 146A. The distance from intersection point 146A to intersection point 142A is distance X1, and the distance from intersection point 146A to point 144A is distance Y1. The absolute value of the slope of the first side edge 140A with respect to the gate line extending direction a1 is a value obtained by dividing the distance Y1 by the distance X1 (Y1/X1).

Similarly, extension line 140BE of second side edge 140B intersects extension line A1E at intersection point 142B. And line segment 144BE refers to a line segment parallel to direction a2 and passing through point 144B on second side edge 140B, and line segment 144BE intersects extension line A1E at intersection point 146B. The distance from intersection point 146B to intersection point 142B is distance X2, and the distance from intersection point 146B to point 144B is distance Y2. The absolute value of the slope of the second side edge 140B with respect to the gate line extending direction a1 is a value obtained by dividing the distance Y2 by the distance X2 (Y2/X2).

The intersection angle θ 3 is an acute angle between the first side edge 140A (or the extension line 140AE thereof) and the gate line extending direction a1, and the intersection angle θ 4 is an acute angle between the second side edge 140B (or the extension line 140BE thereof) and the gate line extending direction a 1. Since the absolute value of the slope of the first side edge 140A of the connecting portion 118 is smaller than the absolute value of the slope of the second side edge 140B, the intersection angle θ 4 is larger than the intersection angle θ 3.

As shown in fig. 3D, the absolute value of the slope of the first side edge 140A of the connection portion 118 is smaller than the absolute value of the slope of the second side edge 140B (or the intersection angle θ 4 is greater than the intersection angle θ 3), which means that the area of the portion of the connection portion 118 on the first side S1 is smaller than the area of the portion of the connection portion 118 on the second side S2, so that the number of liquid crystal molecules with the first side S1 having different inversion directions from most of the liquid crystal molecules can be reduced, the liquid crystal efficiency can be increased, the brightness of the liquid crystal panel can be increased during displaying, and the brightness unevenness can be reduced to improve the display quality.

In addition, as shown in fig. 3D, the length L3 of the first side edge 140A (i.e., the length of the thick line denoted by the symbol L3 in fig. 3D) may be smaller than the length L4 of the second side edge 140B (i.e., the length of the thick line denoted by the symbol L4 in fig. 3D), which means that the area of the portion of the connecting portion 118 located on the first side S1 is smaller than the area of the portion of the connecting portion 118 located on the second side S2, so that the number of liquid crystal molecules falling to different directions from most of the liquid crystal molecules can be further reduced, thereby increasing the liquid crystal efficiency and reducing the brightness unevenness of the display quality.

Next, with continued reference to FIG. 3D, the opening 120 of the first electrode 106 (which is a common electrode in this embodiment) has a first side 148A on the first side S1 and a second side 148B on the second side S2. The connecting portion 118 of the second electrode 108 (in this embodiment, the pixel electrode) has a first region 150A outside the first side 148A (i.e., outside the thick line indicated by the reference numeral 148A in fig. 3D), and the connecting portion 118 has a second region 150B outside the second side 148B (i.e., outside the thick line indicated by the reference numeral 148B in fig. 3D), wherein the area of the first region 150A is smaller than that of the second region 150B.

In detail, a portion of the connection portion 118 not overlapping the opening 120 may be divided into two portions. The portion near the first side S1 is located outside the first side 148A of the aperture 120 and is referred to as a first region 150A (closer to the left in the figure), and the portion near the second side S2 is located outside the second side 148B of the aperture 120 and is referred to as a second region 150B (closer to the right in the figure).

As shown in fig. 3D, since the area of the first region 150A closer to the first side S1 of the connection portion 118 is smaller than the area of the second region 150B closer to the second side S2, the number of liquid crystal molecules with different inversion directions from most of the liquid crystal molecules on the first side S1 can be reduced, so as to increase the liquid crystal efficiency, increase the brightness of the liquid crystal panel during displaying, and reduce the brightness unevenness to improve the display quality.

Furthermore, although only the embodiment of the pixel electrode having one finger portion is invented above, the pixel electrode may have two or more finger portions as shown in the embodiment of fig. 4. The scope of the present invention is not limited to the embodiments shown in fig. 1A-3D.

Fig. 4 is a top view of a pixel electrode of an array substrate according to another embodiment of the present invention, in which the second electrode 108 as a pixel electrode further includes a second finger portion 152 substantially parallel to the first finger portion 116 and an inclined slit 154 disposed between the first finger portion 116 and the second finger portion 152. The second electrode 108 with two fingers can further improve the liquid crystal efficiency to increase the brightness of the liquid crystal panel during displaying.

In addition, although only the first electrode is used as the common electrode and the second electrode is used as the pixel electrode in the above embodiments, it is obvious to those skilled in the art that the first electrode can also be used as the pixel electrode and the second electrode can be used as the common electrode. In other words, in the array substrate, the pixel electrode may be disposed on the substrate, and the common electrode is disposed on the pixel electrode.

In addition, the present invention also provides a display device 200 having the array substrate 100, as shown in fig. 5. The display device 200 of fig. 5 includes the array substrate 100 of the present invention, an opposite substrate 202 disposed opposite to the array substrate 100, and a display medium 204 disposed between the array substrate 100 and the opposite substrate 202.

The opposite substrate 202 may be a color filter substrate, a transparent substrate, or any other suitable substrate. The color filter substrate may include a transparent substrate and a color filter layer disposed on the transparent substrate. The transparent substrate may include a glass substrate, a ceramic substrate, a plastic substrate, or any other suitable transparent substrate.

The display medium 204 may be a liquid crystal material, for example, a nematic liquid crystal (nematic), a smectic liquid crystal (symmetric), a cholesteric liquid crystal (cholesteric), a Blue phase liquid crystal (Blue phase), or any other suitable liquid crystal material.

The display device 200 may be a liquid crystal display, such as a thin film transistor liquid crystal display. Alternatively, the liquid crystal display may be a Twisted Nematic (TN) type liquid crystal display, a Super Twisted Nematic (STN) type liquid crystal display, a Double layer Super Twisted Nematic (DSTN) type liquid crystal display, a Vertical Alignment (VA) type liquid crystal display, an In-Plane Switching (IPS) type liquid crystal display, a cholesterol (cholesterol) type liquid crystal display, a Blue Phase (Blue Phase) type liquid crystal display, or any other suitable liquid crystal display.

In summary, the invention can substantially reduce the area of the connecting portion at the specific side by enlarging the concave edge of the pixel electrode at the specific side, so as to reduce the number of the liquid crystal molecules with the reverse direction different from that of most of the liquid crystal molecules at the specific side. Therefore, the liquid crystal efficiency can be increased to increase the brightness of the liquid crystal panel during displaying, and the bright-line area or the dark-line area can be reduced to improve the display quality.

Although the embodiments of the present invention and their advantages have been described above, it should be understood that various changes, substitutions and alterations can be made herein by those skilled in the art without departing from the spirit and scope of the invention. Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification, but it is to be understood that any process, machine, manufacture, composition of matter, means, method and steps, presently existing or later to be developed, that will be obvious to one skilled in the art from this disclosure may be utilized according to the present application as many equivalents of the presently available embodiments of the present application are possible. Accordingly, the scope of the present application includes the processes, machines, manufacture, compositions of matter, means, methods, or steps described in the specification. In addition, each claim constitutes a separate embodiment, and the scope of protection of the present invention also includes combinations of the respective claims and embodiments.

Claims

1. A display device, comprising:

an array substrate, comprising:

a substrate;

a first electrode disposed on the substrate, wherein the first electrode has an opening with an edge in a direction parallel to an extending direction of a gate line, and an extending line parallel to the extending direction of the gate line and overlapping the edge; and

and a second electrode disposed on the first electrode, wherein the second electrode includes a connecting portion disposed at one side of the extension line, the connecting portion has a first region and a second region, the first region and the second region are adjacent to the opening, the first region and the second region are not overlapped with the opening, and the area of the first region is different from the area of the second region.

2. The display device of claim 1, wherein the array substrate further comprises a plurality of sub-pixels, the substrate comprises a data line electrically connected to one of the plurality of sub-pixels, the second electrode is disposed in the one of the plurality of sub-pixels, the opening corresponds to the one of the plurality of sub-pixels, and another second electrode is disposed in another of the plurality of sub-pixels, the data line is electrically connected to the another of the plurality of sub-pixels, the first electrode has another opening corresponding to the another of the plurality of sub-pixels, wherein the another second electrode has another first region and another second region adjacent to the another opening, the another first region and the another second region are not overlapped with the another opening, wherein the first region and the another second region are adjacent to the data line, and the area of the first region is different from the area of the other second region.

3. The display device according to claim 2, wherein the second region and the another first region are away from the data line, and an area of the second region is different from an area of the another first region.

4. The display device of claim 1, wherein the second electrode further comprises a first finger on the other side of the extension line.

5. The display device of claim 1, wherein the second electrode further comprises at least two fingers located at the other side of the extension line, and the at least two fingers have an extension direction parallel to an extension direction of a data line.

6. The display device of claim 5, wherein an outer edge of one of the at least two fingers forms an acute angle with the extension line.

7. The display device of claim 5, wherein the first region is adjacent to the extending direction of the at least two fingers, the second region is away from the extending direction of the at least two fingers, and the area of the first region is smaller than the area of the second region.

8. The display device of claim 5, wherein a side of the connecting portion adjacent to the extending direction of the at least two fingers has a concave edge.

9. The display device of claim 1, wherein the second electrode further comprises at least two fingers located at the other side of the extension line, and the at least two fingers have an extension direction parallel to the extension direction of a data line, wherein at least one inclined slit is formed between the at least two fingers, and the sum of the widths of the at least two fingers and the at least one inclined slit in the direction parallel to the extension direction of the gate line is smaller than the maximum width of the connecting portion in the direction parallel to the extension direction of the gate line.

10. The display device according to claim 1, further comprising an insulating layer provided with a through hole in a region of the opening, the through hole having a circular arc edge in a top view.