CN112213889B

CN112213889B - Pixel unit, array substrate, display panel and display device

Info

Publication number: CN112213889B
Application number: CN201910626487.7A
Authority: CN
Inventors: 陈建宏; 梁靖靖
Original assignee: Xianyang Caihong Optoelectronics Technology Co Ltd
Current assignee: Xianyang Caihong Optoelectronics Technology Co Ltd
Priority date: 2019-07-11
Filing date: 2019-07-11
Publication date: 2022-09-13
Anticipated expiration: 2039-07-11
Also published as: CN112213889A

Abstract

The embodiment of the disclosure relates to a pixel unit, an array substrate, a display panel and a display device. The pixel unit comprises a pixel structure, wherein the pixel structure comprises a pixel electrode and a connecting electrode, and the pixel electrode comprises a multi-domain sub-pixel electrode; the connecting electrode is positioned at the peripheral edge position of the pixel electrode; the pixel structure is integrally in a convex polygon shape, and the number of sides of the convex polygon is more than or equal to six. In the embodiment of the disclosure, the whole pixel structure is a convex polygon with the number of sides being more than or equal to six, and compared with the traditional rectangular pixel structure, the balance time of liquid crystal pre-orientation after voltage is applied is shortened, which is beneficial to improving the efficiency of liquid crystal orientation and reducing the possibility of poor liquid crystal orientation.

Description

Pixel unit, array substrate, display panel and display device

Technical Field

The embodiment of the disclosure relates to the technical field of display, in particular to a pixel unit, an array substrate, a display panel and a display device.

Background

PSVA (polymer stable vertical alignment) technology requires applying a voltage to a liquid crystal cell before UV (ultraviolet) light irradiation, pre-orienting liquid crystals, performing UV light irradiation after aligning the liquid crystals, polymerizing RM (photoreactive monomer) into a polymer network structure, and fixing and orienting the pre-oriented liquid crystal molecules.

The prior art has the problem of poor reservation direction. If the liquid crystal is not well pre-oriented, the liquid crystal can be poorly oriented after being irradiated by UV light, thereby affecting the optical performance; if the liquid crystal is not well pre-aligned, it takes much time to align the liquid crystal even if the final alignment of the liquid crystal can reach a desired position, resulting in a decrease in productivity.

Accordingly, there is a need to ameliorate one or more of the problems with the related art solutions described above.

It is noted that this section is intended to provide a background or context to the embodiments of the disclosure that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

Disclosure of Invention

An object of the embodiments of the present disclosure is to provide a pixel unit, an array substrate, a display panel and a display device, which overcome one or more of the problems due to the limitations and disadvantages of the related art, at least to a certain extent.

According to a first aspect of the embodiments of the present disclosure, there is provided a pixel unit, the pixel unit comprising a pixel structure, the pixel structure comprising a pixel electrode and a connection electrode, wherein the pixel electrode comprises a multi-domain sub-pixel electrode; the connecting electrode is positioned at the peripheral edge of the pixel electrode; the pixel structure is integrally in a convex polygon shape, and the number of sides of the convex polygon is more than or equal to six.

In one embodiment, each of the domains includes a plurality of slits arranged in parallel.

In one embodiment, the pixel unit further comprises a plurality of data lines and scanning lines which are arranged on the array substrate in a crossed manner, and the data lines and the scanning lines define a pixel area;

the pixel structure is positioned in the pixel area; wherein the shape of the portion of the data line and/or the scan line located in the pixel region matches the pixel structure of the convex polygon.

In one embodiment, the pixel electrode is rectangular as a whole, and the shape of the connecting electrode matches the shape of the convex polygonal pixel structure.

In one embodiment, the width of the connection electrode is uniform, and the overall shape of the pixel electrode is also the convex polygon.

In one embodiment, the width of the connection electrode in the pixel structure is larger than or equal to 2 μm.

In one embodiment, the minimum interior angle of the convex polygon is ≦ 95 °

According to a second aspect of the embodiments of the present disclosure, an array substrate is provided, where the array substrate includes a plurality of pixel units according to the embodiments.

According to a third aspect of the embodiments of the present disclosure, there is provided a display panel including the array substrate of the above embodiments.

According to a fourth aspect of the embodiments of the present disclosure, there is provided a display device including the display panel of the above embodiments.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

in the embodiment of the disclosure, by the pixel unit, the array substrate, the display panel and the display device, the whole pixel structure is a convex polygon with the number of sides being more than or equal to six, and compared with the traditional rectangular pixel structure, the liquid crystal pre-alignment balancing time after voltage is applied is shortened, which is beneficial to improving the liquid crystal alignment efficiency and reducing the possibility of poor liquid crystal alignment.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.

Fig. 1 shows a schematic structural diagram of one pixel cell in an exemplary embodiment of the present disclosure;

FIG. 2 shows a schematic diagram of a pixel cell in an exemplary embodiment of the present disclosure;

FIG. 3 shows a schematic diagram of a pixel cell in an exemplary embodiment of the present disclosure;

fig. 4 shows a schematic structural diagram of one pixel unit in an exemplary embodiment of the present disclosure.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of embodiments of the disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.

The present exemplary embodiment first provides a pixel unit. Referring to fig. 1, the pixel unit may include a pixel structure 1, the pixel structure 1 including a pixel electrode 2 and a connection electrode 3, wherein the pixel electrode 2 includes a multi-domain sub-pixel electrode 201; the connecting electrode 3 is positioned at the peripheral edge position of the pixel electrode 2; the pixel structure 1 is a convex polygon as a whole, and the number of sides of the convex polygon is more than or equal to six.

In the embodiment of the disclosure, the whole pixel structure is a convex polygon with the number of sides being more than or equal to six, and compared with the traditional rectangular pixel structure, the balance time of liquid crystal pre-orientation after voltage is applied is shortened, which is beneficial to improving the efficiency of liquid crystal orientation and reducing the possibility of poor liquid crystal orientation.

Next, each part of the above-described pixel unit in the present exemplary embodiment will be described in more detail with reference to fig. 1 to 4.

In an embodiment, the pixel unit may include a plurality of data lines 4 and scan lines 5 disposed on the array substrate in a crossing manner, the data lines 4 and the scan lines 5 define a pixel region, the pixel structure 1 is located in the pixel region, and the pixel structure 1 may overlap with the data lines 4 and/or the scan lines 5, or may not overlap with the data lines 4 and/or the scan lines 5, which is not limited herein. For example, in a specific example, referring to fig. 2, one pixel region is defined by two data lines 4 and two scan lines 5 arranged to intersect, and the pixel structure 1 is located within the defined pixel region. In the embodiment of the present disclosure, the pixel unit may further include other structures such as a TFT (thin film transistor), but is not limited thereto.

In one embodiment, the pixel electrode 2 may include a multi-domain sub-pixel electrode 201, which may be a four-domain, eight-domain, etc. multi-domain sub-pixel electrode, but is not limited thereto. In a specific example, the pixel electrode 2 may include a four-domain sub-pixel electrode, and the pixel electrode 2 may be divided into four-

domain sub-pixel electrodes

201a, 201b, 201c, and 201d by a horizontal main electrode 202 and a vertical main electrode 203, where the horizontal main electrode 202 and the vertical main electrode 203 are both connected to the connection electrode 3 at the peripheral edge position of the pixel electrode 2; each of the

domain subpixel electrodes

201a, 201b, 201c, and 201d is connected to the horizontal main electrode 202 or the vertical main electrode 203, and is connected to the connection electrode 3.

In one embodiment, the pixel electrode 2 may include an alignment structure for aligning liquid crystal molecules, and the alignment structure may be a bump structure or a slit structure, but is not limited thereto. In a specific example, the four-

domain sub-pixel electrodes

201a, 201b, 201c, and 201d of the pixel electrode 2 respectively include a plurality of slits 204 arranged in parallel, and the directions of the slits 204 in the respective domain sub-pixel electrodes are different, for example, the directions of the slits 204 in the sub-pixel electrode 201 are generally in a shape of "meter" so that the liquid crystal molecules in the respective domain sub-pixel electrodes 201 are orderly arranged in different directions, thereby expanding the viewing angle.

In some embodiments, the width and the pitch of the slits 204 in each domain sub-pixel electrode may be the same, and the width and the pitch of the slits 204 between different domain sub-pixel electrodes may be the same. In some embodiments, between at least two adjacent domain subpixel electrodes 201, the slits 204 may be arranged in a staggered manner as a whole. For example, in a specific example, referring to fig. 2, the slits 204 between the

sub-pixel electrodes

201a, 201b, 201c and 201d are arranged in a staggered manner, wherein the slits 204 between the sub-pixel electrode 201a and the sub-pixel electrode 201d and between the sub-pixel electrode 201b and the sub-pixel electrode 201c are arranged in a staggered manner in the horizontal direction; slits 204 between the

sub-pixel electrodes

201a and 201b and between the

sub-pixel electrodes

201c and 201d are arranged in a staggered manner in the vertical direction.

In one embodiment, the pixel structure 1 has a convex polygon shape as a whole, the number of sides of the convex polygon shape is equal to or greater than six, and the convex polygon shape may be a convex hexagon, a convex octagon, a convex decagon, and the like, but is not limited thereto. In a specific example, referring to fig. 1 to 3, the pixel structure 1 has a convex hexagonal shape as a whole; in another specific example, referring to fig. 4, the pixel structure 1 has a convex octagonal shape as a whole. In the embodiment of the present disclosure, the convex polygon pixel structure 1 may be a regular convex polygon or may not be a regular convex polygon, which is not limited herein. Compared with the conventional rectangular pixel structure, the convex polygonal pixel structure 1 has an angle closer to the orientation angle of the liquid crystal molecules, and the liquid crystal molecules can reach a stable ordered arrangement state from an unordered state more quickly after a voltage is applied. Compared with the traditional rectangular pixel structure, the aperture opening ratio of the pixel unit adopting the convex polygonal pixel structure is increased, and the transmittance of the pixel unit is favorably improved.

In one embodiment, the angle at the corresponding position of the pixel structure 1 of the convex polygon shape is slightly larger than the angle of the right internal angle of the rectangle, which is closer to the orientation angle of the liquid crystal molecules, and the liquid crystal molecules can more rapidly reach a stable ordered arrangement state from a disordered state after the voltage is applied, compared to the conventional rectangular shaped pixel structure. Meanwhile, the angle should not be too large, which may cause the shapes of the peripheral data lines and the scan lines not to be easily matched with the shapes of the pixel structures. Therefore, in the pixel structure 1 of the convex polygon in the embodiment of the disclosure, the minimum internal angle of the convex polygon may be less than or equal to 95 °.

In an embodiment, the shape of the portions of the data lines 4 and/or the scan lines 5 located at said pixel area matches the pixel structure 1 of a convex polygon. In a specific example, referring to fig. 3, the shape of the portion of the data line 4 located in the pixel region matches with the shape of the pixel structure 1 of the convex polygon, the convex polygon is located at an outward convex position, the data line 4 is concave correspondingly, which may be a corresponding concave on one side of the data line 4 close to the convex polygon, an inner angle of the convex polygon at the outward convex position may be the same as an angle of the corresponding concave of the data line 4, and the corresponding concave of the data line 4 is beneficial to improving the aperture opening ratio of the pixel unit, thereby improving the transmittance of the pixel unit. In another specific example, referring to fig. 4, the shape of the portion of the data line 4 and the scan line 5 located in the pixel region matches the shape of the pixel structure 1 of the convex polygon, the convex polygon is located at an outward convex position, the data line 4 and the scan line 5 are correspondingly concave, which may be a corresponding concave of one side of the data line 4 and the scan line 5 close to the convex polygon, an inner angle of the outward convex position of the convex polygon may be the same as an angle of the corresponding concave of the data line 4 and the scan line 5, and the corresponding concave of the data line 4 and the scan line 5 is beneficial to improving the aperture ratio of the pixel unit, thereby improving the transmittance of the pixel unit.

In one embodiment, referring to fig. 1, the pixel electrode 2 may have a rectangular shape as a whole, and the connection electrode 3 has a shape matching the shape of the pixel structure 1 of a convex polygon whose width is widened at a position where the convex polygon is outwardly convex. In one embodiment, referring to fig. 3, the width of the connection electrode 3 may be uniform, and the overall shape of the pixel electrode 2 is also a convex polygon conforming to the shape of the pixel structure. In one embodiment, the width of the connection electrode 3 in the pixel structure 1 can be greater than or equal to 2 μm for better eliminating the dark fringe of the pixel electrode.

The present exemplary embodiment further provides an array substrate, which includes a plurality of pixel units described in the above embodiments.

In this example embodiment, a display panel is further provided, and the display panel includes the array substrate according to the above example.

There is also provided in this example embodiment a display device including the display panel described in the above example.

The array substrate, the display panel and the display device in the embodiments of the present disclosure all include the pixel unit in the embodiments. Through the pixel unit, the array substrate, the display panel and the display device, the whole pixel structure is a convex polygon with the number of sides larger than six, compared with the traditional rectangular pixel structure, the liquid crystal pre-alignment balancing time is shortened after voltage is applied, the liquid crystal alignment efficiency is favorably improved, and the possibility of poor liquid crystal alignment is favorably reduced.

It is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like in the foregoing description are used for indicating or indicating the orientation or positional relationship illustrated in the drawings, merely for the convenience of describing the disclosed embodiments and for simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and therefore should not be considered limiting of the disclosed embodiments.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present disclosure, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present disclosure, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In the embodiments of the present disclosure, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A pixel cell comprising a pixel structure, wherein the pixel structure comprises:

a pixel electrode including a multi-domain sub-pixel electrode;

the connecting electrode is positioned at the peripheral edge position of the pixel electrode;

the pixel structure is integrally in a convex polygon shape, the number of sides of the convex polygon is more than or equal to six, the minimum inner angle of the convex polygon is less than or equal to 95 degrees, and the width of a connecting electrode in the pixel structure is more than or equal to 2 mu m;

the pixel structure also comprises a plurality of data lines and scanning lines which are arranged on the array substrate in a crossed manner, wherein the data lines and the scanning lines define pixel regions;

the pixel structure is positioned in the pixel area; wherein the shape of the data line and/or the part of the scanning line located in the pixel region matches the pixel structure of the convex polygon;

and the two sides of the data line and/or the scanning line are concave and matched with the pixel structure of the convex polygon.

2. The pixel unit of claim 1, wherein each domain of the sub-pixel electrode comprises a plurality of slits arranged in parallel.

3. The pixel unit according to claim 1, wherein the pixel electrode is rectangular as a whole, and the shape of the connection electrode matches the shape of the convex polygonal pixel structure.

4. The pixel cell of claim 1, wherein the width of the connection electrode is uniform, and the overall shape of the pixel electrode is the convex polygon.

5. An array substrate comprising a plurality of pixel units according to any one of claims 1 to 4.

6. A display panel comprising the array substrate according to claim 5.

7. A display device characterized by comprising the display panel according to claim 6.