WO2020215556A1 - Pixel electrode structure and liquid crystal display panel - Google Patents

Abstract

A pixel electrode structure and a liquid crystal display panel. The pixel electrode structure comprises a first main electrode (1), a second main electrode (2), and a plurality of branch electrodes (3); the first main electrode (1) and the second main electrode (2) vertically intersect to define a first electrode area (11), a second electrode area (12), a third electrode area (13), and a fourth electrode area (14) which are distributed in a grid pattern, and the plurality of branch electrodes (3) are arranged in parallel at intervals in the first to fourth electrode areas; the branch electrodes (3) located in the second electrode area (12) and the first electrode area (11) are symmetrical about the first main electrode (1), the branch electrodes (3) located in the second electrode area (12) and the third electrode area (13) are symmetrical about the second main electrode (2), the branch electrodes (3) located in the fourth electrode area (14) and the third electrode area (13) are symmetrical about the first main electrode (1), and the branch electrodes (3) located in the third electrode area (13) are all arranged offset from the branch electrodes (3) located in the first electrode area (11). Therefore, the size of a dark fringe area can be effectively controlled, and the display quality can be improved.

Description

Pixel electrode structure and liquid crystal display panel Technical field

The present invention relates to the field of display technology, in particular to a pixel electrode structure and a liquid crystal display panel.

Background technique

Liquid Crystal Display (LCD) has many advantages such as thin body, power saving, and no radiation, and has been widely used, such as: LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen or Notebook computer screens, etc., dominate the flat panel display field.

Generally, a liquid crystal display device includes a casing, a liquid crystal panel arranged in the casing, and a backlight module (Backlight module) arranged in the casing. Among them, the structure of the liquid crystal panel is mainly composed of a thin film transistor array substrate (Thin Film Transistor Array). Substrate, TFT Array Substrate), a color filter substrate (Color Filter Substrate, CF Substrate), and a liquid crystal layer (Liquid Crystal Layer) arranged between the two substrates. A driving voltage is applied to the pixel electrode of the pixel electrode and the common electrode of the CF substrate to control the rotation of the liquid crystal molecules of the liquid crystal layer, and refract the light from the backlight module to produce a picture.

In order to obtain better wide viewing angle characteristics of liquid crystal display panels and improve color shift, the prior art proposes a multi-domain technology, that is, a sub-pixel is divided into multiple regions, and the liquid crystal in each region is Lodging in different directions, so that the effects seen in all directions tend to be uniform. As shown in FIG. 1, the existing pixel electrode structure using multi-domain technology includes a strip-shaped first main electrode 100, a strip-shaped second main electrode 200, and a plurality of strip-shaped branch electrodes 300; the first main electrode 100 and the second main electrode 200 perpendicularly intersect and divide the first electrode area 101, the second electrode area 102, the third electrode area 103, and the fourth electrode area 104 distributed in a square shape. The first electrode area 101 and the second electrode area The region 102, the third electrode region 103, and the fourth electrode region 104 are provided with a plurality of branch electrodes 300 arranged in parallel and spaced apart. One end of each branch electrode 300 is connected to the first main electrode 100 and the second main electrode 200. One is connected, and the other ends extend away from the intersection of the first main electrode 100 and the second main electrode 200; the branch electrode 300 located in the second electrode area 102 and the branch electrode located in the first electrode area 101 300 is symmetrical with respect to the first main electrode 100, the branch electrode 300 located in the second electrode area 102 and the branch electrode 300 located in the third electrode area 103 are symmetrical with respect to the second main electrode 200, and the branch electrode located in the fourth electrode area 104 300 and the branch electrodes 300 located in the third electrode area 103 are symmetrical with respect to the first main electrode 100; each branch electrode 300 located in the third electrode area 103 corresponds to a branch electrode 300 located in the first electrode area 101, And the side of the branch electrode 300 located in the third electrode area 103 close to the second main electrode 200 is close to the branch electrode 300 located in the first electrode area 101 corresponding to the branch electrode 300 located in the third electrode area 103 One side of the first main electrode 100 is on the same straight line, that is, the branch electrode 300 located in the third electrode area 103 and the branch electrode 300 located in the first electrode area 101 are related to the first main electrode 100 and the second main electrode. The intersection point of 200 is symmetrical. The branch electrode 300 located in the second electrode area 102 and the branch electrode 300 located in the fourth electrode area 104 are symmetrical about the intersection of the first main electrode 100 and the second main electrode 200, because the liquid crystal The molecule is a continuum. While the multi-domain technology improves the viewing angle, it also produces dark lines at the domain boundaries and the positions of the first stem electrode 100 and the second stem electrode 200, and in the pixel electrode structure shown in FIG. 1, In the area where the first main electrode 100 and the second main electrode 200 intersect, due to the continuous state of the long axis molecules of the deflected liquid crystal or the influence of the local electric field, the dark lines at the domain boundaries are difficult to control, and the dark lines are prone to channeling. When entering the opening area, it affects the transmittance and display quality of the panel.

technical problem

The purpose of the present invention is to provide a pixel electrode structure, which can effectively control the size of the dark pattern area and improve the display quality.

The purpose of the present invention is also to provide a liquid crystal display panel, which can effectively control the size of the dark pattern area and improve the display quality.

Technical solutions

To achieve the above objective, the present invention provides a pixel electrode structure, including a strip-shaped first main electrode, a strip-shaped second main electrode, and a plurality of strip-shaped branch electrodes;

The first main electrode and the second main electrode vertically intersect to divide the first electrode area, the second electrode area, the third electrode area, and the fourth electrode area distributed in a square shape. The first electrode area and the second electrode area , The third electrode area and the fourth electrode area are provided with a plurality of branch electrodes arranged in parallel and spaced apart, one end of each branch electrode is connected to one of the first main electrode and the second main electrode, and the other end is far away Extending in the direction of the intersection of the first main electrode and the second main electrode;

The branch electrode located in the second electrode area and the branch electrode located in the first electrode area are symmetrical about the first main electrode, and the branch electrode located in the second electrode area and the branch electrode located in the third electrode area are about the second main electrode Symmetrical, the branch electrode located in the fourth electrode area and the branch electrode located in the third electrode area are symmetrical with respect to the first main electrode;

Each branch electrode located in the third electrode area corresponds to a branch electrode located in the first electrode area, and the branch electrode located in the third electrode area is close to the line of the second main electrode. The branch electrode located in the third electrode area corresponds to a straight line parallel interval where a side of the branch electrode located in the first electrode area is close to the first main electrode.

In a branch electrode located in the third electrode area and a branch electrode located in the first electrode area corresponding to each other, the branch electrode located in the third electrode area is symmetrical to the second main electrode and the branch electrode is symmetrical to the branch electrode located in the third electrode area. The branch electrodes located in the first electrode region are symmetrical with respect to the first main electrode and are the same branch electrode.

The width of each branch electrode is L, and each branch electrode located in the third electrode area is located on the first electrode corresponding to the side of the branch electrode close to the second main electrode. The distance between the straight lines on which the side of the branch electrodes in the region is close to the first main electrode is Shift, Shift≤L.

Optionally, Shift≥L/2.

The separation distance between two parallel and adjacent branch electrodes is S, S=L.

Optionally, 2μm≤L≤4μm.

Optionally, the angle between each branch electrode and the first main electrode is 30° to 60°.

Optionally, the angle between each branch electrode and the first main electrode is 45°.

Optionally, it is made of indium tin oxide material.

The present invention also provides a liquid crystal display panel including the above-mentioned pixel electrode structure.

Beneficial effect

The beneficial effects of the present invention: the present invention provides a pixel electrode structure, including a first main electrode, a second main electrode, and a plurality of branch electrodes; the first main electrode and the second main electrode perpendicularly intersect and divide a square-shaped distribution The first electrode area, the second electrode area, the third electrode area and the fourth electrode area of the first electrode area, the second electrode area, the third electrode area and the fourth electrode area are all arranged in parallel and spaced apart Multiple branch electrodes; branch electrodes located in the second electrode area and branch electrodes located in the first electrode area are symmetrical about the first main electrode, branch electrodes located in the second electrode area and branch electrodes located in the third electrode area Symmetrical about the second main electrode, the branch electrode located in the fourth electrode area and the branch electrode located in the third electrode area are symmetrical about the first main electrode, and the branch electrodes located in the third electrode area are all the same as those located in the first electrode area. The dislocation arrangement of the branch electrodes inside can effectively control the size of the dark pattern area and improve the display quality. The invention also provides a liquid crystal display panel, which can effectively control the size of the dark pattern area and improve the display quality.

Description of the drawings

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. However, the accompanying drawings are only provided for reference and illustration and are not used to limit the present invention.

In the attached picture,

FIG. 1 is a schematic diagram of a conventional pixel electrode structure;

FIG. 2 is a schematic diagram of the pixel electrode structure of the present invention.

Embodiments of the invention

In order to further explain the technical means adopted by the present invention and its effects, the following describes in detail the preferred embodiments of the present invention and the accompanying drawings.

Referring to FIG. 2, the present invention provides a pixel electrode structure, including a strip-shaped first main electrode 1, a strip-shaped second main electrode 2 and a plurality of strip-shaped branch electrodes 3;

The first main electrode 1 and the second main electrode 2 perpendicularly intersect and divide the first electrode area 11, the second electrode area 12, the third electrode area 13 and the fourth electrode area 14 distributed in a square shape.

Specifically, the first electrode area 11 is located on the left side of the second electrode area 12, the third electrode area 13 is located on the lower side of the second electrode area 12, and the fourth electrode area 14 is located on the third electrode area 13 Is on the left side of and is located on the lower side of the first electrode region 11.

In detail, the first electrode region 11, the second electrode region 12, the third electrode region 13, and the fourth electrode region 14 are provided with a plurality of branch electrodes 3 arranged in parallel and spaced apart, and one end of each branch electrode 3 is It is connected to one of the first main electrode 1 and the second main electrode 2, and the other end extends away from the intersection of the first main electrode 1 and the second main electrode 2.

Further, each branch electrode 3 is inclined at a certain angle with respect to the first main electrode 1. Preferably, the angle between each branch electrode 3 and the first main electrode 1 ranges from 30° to 60°, and more Preferably, the angle between each branch electrode 3 and the first main electrode 1 ranges from 45°.

Further, the branch electrode 3 located in the second electrode area 12 and the branch electrode 3 located in the first electrode area 11 are symmetrical with respect to the first main electrode 1, and the branch electrode 3 located in the second electrode area 12 is symmetrical with respect to the third electrode. The branch electrodes 3 in the area 13 are symmetrical with respect to the second main electrode 2, and the branch electrodes 3 located in the fourth electrode area 14 and the branch electrodes 3 located in the third electrode area 13 are symmetrical with respect to the first main electrode 1, that is, The branch electrode 3 on the left side of the first main electrode 1 is mirror-symmetrical to the branch electrode 3 on the right side of the first main electrode 1, the branch electrode on the upper side of the second main electrode 2 and the branch on the lower side of the second main electrode 2 The electrode 3 is mirror-symmetrical.

It should be emphasized that in the present invention, each branch electrode 3 located in the third electrode region 13 corresponds to a branch electrode 3 located in the first electrode region 11, and the branch electrode 3 located in the third electrode region 13 3 The straight line near the side of the second main electrode 2 corresponds to the branch electrode 3 located in the third electrode area 13 and the branch electrode located in the first electrode area 11 3 The side close to the first main electrode 1 The straight line is spaced parallel to each other, that is, the branch electrode 3 in the third electrode region 13 is offset from the branch electrode 3 in the first electrode region 11, and the branch electrode 3 in the second electrode region 12 and the branch electrode 3 in the second electrode region 12 The branch electrodes 3 in the electrode area 11 are staggered, that is, the branch electrodes 3 in the third electrode area 13 and the branch electrodes 3 in the first electrode area 11 are not about the intersection of the first main electrode 1 and the second main electrode 2 The point center is symmetric, and the branch electrode 3 located in the second electrode area 12 and the branch electrode 3 located in the fourth electrode area 14 are not symmetric about the center of the intersection of the first main electrode 1 and the second main electrode.

It should be noted that, among the branch electrodes 3 located in the third electrode region 13 and the branch electrodes 3 located in the first electrode region 11, the branch electrodes 3 located in the third electrode region 13 are related to the second The branch electrode 3 symmetrical to the main electrode 2 and the branch electrode 3 symmetrical with respect to the first main electrode 1 in the first electrode region 11 are the same branch electrode 3.

Preferably, the pixel electrode structure is made of indium tin oxide material.

Specifically, the width of each branch electrode 3 is L, and each branch electrode 3 located in the third electrode area 13 is located on a straight line close to the side of the second main electrode 2 and the line located in the third electrode area 13 The distance between the straight lines where the branch electrode 3 corresponding to the branch electrode 3 located in the first electrode region 11 is close to the first main electrode 1 is Shift, Shift≦L.

Further, in order to ensure the effect of controlling the size of the dark lines, the present invention also sets Shift≥L/2.

Specifically, the distance between two parallel and adjacent branch electrodes 3 is S, S=L.

Preferably, 2μm≤L≤4μm.

For example, in some embodiments of the present invention, the width L of each branch electrode 3 is 3 μm, the distance S between the two parallel and adjacent branch electrodes 3 is also 3 μm, and each is located at the first The branch electrode 3 in the three-electrode region 13 is close to the second main electrode 2 in a straight line corresponding to the branch electrode 3 in the third electrode region 13, and the branch electrode 3 in the first electrode region 11 is close to the first electrode region. The distance shift between the straight lines on which one side of the main electrode 1 is located is also 3 μm, so that the extension lines of each branch electrode 3 located in the third electrode area 13 in the first electrode area 11 are located on two adjacent ones. Compared with the prior art, the separation area between the two branch electrodes 3 in the present invention adopts the misalignment arrangement of the branch electrodes located in the third electrode area and the branch electrodes located in the first electrode area and the offset arrangement in the second electrode area. The dislocation arrangement of the branch electrode and the branch electrode in the fourth electrode area, by appropriately breaking the symmetry of the branch electrode, makes the actual electric field at the intersection of the first main electrode 1 and the second main electrode 2 easier for the transition of the deflection state of the liquid crystal molecules, thereby Make the dark lines converge, that is, the present invention can effectively converge the size of the dark line area, especially the size of the dark line area at the intersection of the first main electrode 1 and the second main electrode 2, prevent the dark line area from entering the opening area, and ensure The penetration rate and display effect of the display panel.

Based on the above-mentioned pixel electrode structure, the present invention also provides a liquid crystal display panel including the above-mentioned pixel electrode structure.

In summary, the present invention provides a pixel electrode structure, including a first main electrode, a second main electrode, and a plurality of branch electrodes; the first main electrode and the second main electrode perpendicularly intersect and divide the shape of a square The first electrode area, the second electrode area, the third electrode area, and the fourth electrode area, the first electrode area, the second electrode area, the third electrode area, and the fourth electrode area are all provided with parallel and spaced multiple A branch electrode; the branch electrode located in the second electrode area and the branch electrode located in the first electrode area are symmetrical about the first main electrode, and the branch electrode located in the second electrode area is related to the branch electrode located in the third electrode area The second main electrode is symmetrical. The branch electrode located in the fourth electrode area and the branch electrode located in the third electrode area are symmetrical with respect to the first main electrode, and each branch electrode located in the third electrode area is connected to one located in the first electrode area. The branch electrode in the electrode area corresponds to the branch electrode located in the third electrode area, and the line where the side of the branch electrode located in the third electrode area is close to the second main electrode is located in the first electrode area corresponding to the branch electrode located in the third electrode area The straight-line parallel interval where the branch electrode is close to the side of the first main electrode can effectively control the size of the dark pattern area and improve the display quality. The invention also provides a liquid crystal display panel, which can effectively control the size of the dark pattern area and improve the display quality.

As mentioned above, for those of ordinary skill in the art, various other corresponding changes and modifications can be made according to the technical solutions and technical ideas of the present invention, and all these changes and modifications shall fall within the protection scope of the claims of the present invention. .

Claims (18)

1. A pixel electrode structure, comprising a strip-shaped first main electrode, a strip-shaped second main electrode and a plurality of strip-shaped branch electrodes;

   The first main electrode and the second main electrode vertically intersect to divide the first electrode area, the second electrode area, the third electrode area, and the fourth electrode area distributed in a square shape. The first electrode area and the second electrode area , The third electrode area and the fourth electrode area are provided with a plurality of branch electrodes arranged in parallel and spaced apart, one end of each branch electrode is connected to one of the first main electrode and the second main electrode, and the other end is far away Extending in the direction of the intersection of the first main electrode and the second main electrode;

   The branch electrode located in the second electrode area and the branch electrode located in the first electrode area are symmetrical about the first main electrode, and the branch electrode located in the second electrode area and the branch electrode located in the third electrode area are about the second main electrode Symmetrical, the branch electrode located in the fourth electrode area and the branch electrode located in the third electrode area are symmetrical with respect to the first main electrode;

   Each branch electrode located in the third electrode area corresponds to a branch electrode located in the first electrode area, and the branch electrode located in the third electrode area is close to the line of the second main electrode. The branch electrode located in the third electrode area corresponds to a straight line parallel interval where a side of the branch electrode located in the first electrode area is close to the first main electrode.
2. 7. The pixel electrode structure of claim 1, wherein the branch electrode located in the third electrode area and the branch electrode located in the first electrode area corresponding to each other, and the branch electrode located in the third electrode area The branch electrode symmetrical with respect to the second main electrode and the branch electrode symmetrical with respect to the first main electrode and the branch electrode located in the first electrode area are the same branch electrode.
3. 8. The pixel electrode structure of claim 1, wherein the width of each branch electrode is L, and the line of each branch electrode located in the third electrode area close to the side of the second main electrode is in line with the first The distance between the straight line where the branch electrode in the three electrode area corresponds to the side of the branch electrode in the first electrode area close to the first main electrode is Shift, Shift≤L.
4. 5. The pixel electrode structure of claim 3, wherein Shift≥L/2.
5. 3. The pixel electrode structure of claim 3, wherein the separation distance between two parallel and adjacent branch electrodes is S, S=L.
6. The pixel electrode structure of claim 3, wherein 2 μm≦L≦4 μm.
7. 8. The pixel electrode structure of claim 1, wherein the angle between each branch electrode and the first main electrode is 30° to 60°.
8. 8. The pixel electrode structure of claim 1, wherein the angle between each branch electrode and the first main electrode is 45°.
9. 8. The pixel electrode structure of claim 1 is made of indium tin oxide material.
10. A liquid crystal display panel including a pixel electrode structure;

    The pixel electrode structure includes a strip-shaped first main electrode, a strip-shaped second main electrode, and a plurality of strip-shaped branch electrodes;

    The first main electrode and the second main electrode vertically intersect to divide the first electrode area, the second electrode area, the third electrode area, and the fourth electrode area distributed in a square shape. The first electrode area and the second electrode area , The third electrode area and the fourth electrode area are provided with a plurality of branch electrodes arranged in parallel and spaced apart, one end of each branch electrode is connected to one of the first main electrode and the second main electrode, and the other end is far away Extending in the direction of the intersection of the first main electrode and the second main electrode;

    The branch electrode located in the second electrode area and the branch electrode located in the first electrode area are symmetrical about the first main electrode, and the branch electrode located in the second electrode area and the branch electrode located in the third electrode area are about the second main electrode Symmetrical, the branch electrode located in the fourth electrode area and the branch electrode located in the third electrode area are symmetrical with respect to the first main electrode;

    Each branch electrode located in the third electrode area corresponds to a branch electrode located in the first electrode area, and the branch electrode located in the third electrode area is close to the line of the second main electrode. The branch electrode located in the third electrode area corresponds to a straight line parallel interval where a side of the branch electrode located in the first electrode area is close to the first main electrode.
11. 10. The liquid crystal display panel of claim 10, wherein the branch electrode located in the third electrode area and the branch electrode located in the first electrode area corresponding to each other, and the branch electrode located in the third electrode area The branch electrode symmetrical with respect to the second main electrode and the branch electrode symmetrical with respect to the first main electrode and the branch electrode located in the first electrode area are the same branch electrode.
12. The liquid crystal display panel of claim 10, wherein the width of each branch electrode is L, and the line of each branch electrode located in the third electrode area close to the side of the second main electrode is different from the line located on the second main electrode. The distance between the straight line where the branch electrode in the three electrode area corresponds to the side of the branch electrode in the first electrode area close to the first main electrode is Shift, Shift≤L.
13. The liquid crystal display panel of claim 12, wherein Shift≥L/2.
14. 11. The liquid crystal display panel of claim 12, wherein the separation distance between two parallel and adjacent branch electrodes is S, S=L.
15. The liquid crystal display panel of claim 12, wherein 2 μm≦L≦4 μm.
16. 10. The liquid crystal display panel of claim 10, wherein the angle between each branch electrode and the first main electrode is 30° to 60°.
17. 10. The liquid crystal display panel of claim 10, wherein the angle between each branch electrode and the first main electrode is 45°.
18. 10. The liquid crystal display panel of claim 10, wherein the pixel electrode structure is made of indium tin oxide material.