WO2013139132A1

WO2013139132A1 - Array substrate and display device

Info

Publication number: WO2013139132A1
Application number: PCT/CN2012/084343
Authority: WO
Inventors: 胡祖权; 邵贤杰; 王国磊; 马睿; 胡明
Original assignee: 京东方科技集团股份有限公司; 合肥京东方光电科技有限公司
Priority date: 2012-03-21
Filing date: 2012-11-08
Publication date: 2013-09-26
Also published as: CN102707513B; CN102707513A

Abstract

An array substrate and a display device. The array substrate comprises a substrate (401), a first transparent conductive layer (402), an insulating layer (403) and a second transparent conductive layer (404) formed on the substrate (401) orderly; the second transparent conductive layer (404) is provided with a plurality of second strip-shaped grooves (4041); the first transparent conductive layer (402) is provided with the first strip-shaped grooves (4021) corresponding to the plurality of second strip-shaped grooves (4041); and the width of each first strip-shaped groove (4021) is smaller than the width of each second strip-shaped groove (4041).

Description

Array substrate and display device

Embodiments of the present invention relate to an array substrate and a display device. Background technique

Liquid crystal displays are now widely used in various fields, such as electronic products used in homes, public places, office places, and personal electronic related products. The liquid crystal display based on Advanced Super Dimension Switch (ADS) has high resolution, high transmittance, low power consumption, wide viewing angle, high aperture ratio, low chromatic aberration, and no squeeze water ripple. Push Mura) and other advantages, so more and more applications. The ADS type liquid crystal display device forms a multi-dimensional electric field by the electric field generated by the edge of the slit electrode in the same plane and the electric field generated between the slit electrode layer and the plate electrode layer, so that all the liquid crystals in the liquid crystal cell and the liquid crystal are directly above the electrode. The molecules are capable of rotating, thereby improving the liquid crystal working efficiency and increasing the light transmission efficiency, and greatly improving the picture quality of the thin film transistor liquid crystal display (TFT-LCD) product.

1 is a schematic structural view of an array substrate of an ADS type liquid crystal display in the prior art, the array substrate includes: a lower substrate 101, a gate line 102, a common electrode line 103 formed simultaneously with the gate line, a common electrode 104, and a data line 105, a thin film transistor (TFT) 106, a pixel electrode 107 in contact with the thin film transistor 106, and the like. The pixel electrode 107 has a skew groove 108 (corresponding to a slit) having a certain inclination angle. The pixel electrode 107 (corresponding to the slit electrode) having the chute 108 overlaps with the opposing common electrode 104 (corresponding to the plate electrode) to generate a multi-dimensional electric field. The multi-dimensional electric field drives the liquid crystal molecules located on the pixel electrode and between the pixel electrodes (the chute region) to rotate, thereby realizing the adjustment of the gray scale.

The prior art ADS liquid crystal display mainly has the following disadvantages: since the distance between the pixel electrode and the common electrode is much smaller than the thickness of the liquid crystal cell (ie, the distance between the upper and lower substrates), the multi-dimensional generated by the overlapping of the pixel electrode and the common electrode The electric field has a distinct vertical component, especially in the chute area. The vertical component of these multi-dimensional electric fields causes the liquid crystal display arrangement of the liquid crystal display to be very different in the positive frame and the negative frame. 2 is a schematic view showing a distribution of liquid crystal molecules and an electric field when a display screen of a liquid crystal display in the prior art is a positive frame, and FIG. 3 is a display diagram of a liquid crystal display in the prior art. The surface is a schematic diagram of the distribution of liquid crystal molecules and electric fields in a negative frame. 109 is the insulating layer, LM is the liquid crystal molecule, and the TO area is the liquid crystal molecule that is approximately perpendicular to the pixel electrode. As can be seen from Fig. 2 and Fig. 3, the vertical component of the multi-dimensional electric field causes the long axis of the liquid crystal molecules in the chute region to be approximately perpendicular to the pixel electrode distribution, and the liquid crystal molecules in the chute region in the positive frame and the negative frame are The deflection angle under the action of the electric field is different, which causes the brightness of the display picture to be different between the positive frame and the negative frame, resulting in a deterioration of the display picture quality. Summary of the invention

An embodiment of the present invention provides an array substrate including a substrate, and a first transparent conductive layer, an insulating layer, and a second transparent conductive layer sequentially formed on the substrate, wherein the second transparent conductive layer has a plurality of a second strip-shaped groove, the first transparent conductive layer has a first strip-shaped groove opposite to the plurality of second strip-shaped grooves, and the width of the first strip-shaped groove is smaller than the second strip-shaped groove The width.

Another embodiment of the present invention provides a display device comprising an array substrate according to any of the embodiments of the present invention. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below. It is obvious that the drawings in the following description relate only to some embodiments of the present invention, and are not intended to limit the present invention. .

1 is a schematic structural view of an array substrate of an ADS type liquid crystal display in the prior art; FIG. 2 is a schematic view showing a distribution of liquid crystal molecules and an electric field when a display screen of an ADS type liquid crystal display in a prior art is a positive frame;

3 is a schematic view showing a distribution of liquid crystal molecules and an electric field when a display screen of an ADS type liquid crystal display in the prior art is a negative frame;

4 is a schematic cross-sectional structural view of an array substrate according to a first embodiment of the present invention;

FIG. 5 is a schematic structural view of an array substrate according to a first embodiment of the present invention; FIG.

6 is a schematic view showing a distribution of liquid crystal molecules and an electric field when a display screen of a display substrate having an array substrate according to an embodiment of the present invention is a positive frame;

7 is a schematic view showing a distribution of liquid crystal molecules and an electric field when a display screen of a display device having an array substrate according to an embodiment of the present invention is a negative frame; 8 is a schematic structural view of an array substrate according to a second embodiment of the present invention;

9 is a schematic structural view of an array substrate according to a third embodiment of the present invention;

FIG. 10 is a schematic structural view of an array substrate according to a fourth embodiment of the present invention. detailed description

The technical solutions of the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings of the embodiments of the present invention. It is apparent that the described embodiments are part of the embodiments of the invention, rather than all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the described embodiments of the present invention without departing from the scope of the invention are within the scope of the invention.

4 and FIG. 5 are schematic diagrams showing the structure of an array substrate according to a first embodiment of the present invention. The array substrate includes: a substrate 401, and a first transparent conductive layer 402, an insulating layer 403, and a layer sequentially formed on the substrate 401. Two transparent conductive layers 404. The second transparent conductive layer 404 has a plurality of second strip-shaped grooves 4041 , the first transparent conductive layer 402 has a first strip-shaped groove 4021 opposite to the plurality of second strip-shaped grooves 4041 , and the first strip-shaped groove 4021 The width is smaller than the width of the second strip groove 4041.

In the above embodiment, the first transparent conductive layer 402 may be a pixel electrode, and at this time, the second transparent conductive layer 404 is a common electrode.

Alternatively, the first transparent conductive layer 402 may be a common electrode, and in this case, the second transparent conductive layer 404 is a pixel electrode.

That is to say, in the array substrate in this embodiment, the positions of the pixel electrode and the common electrode may be interchanged, and the pixel electrode may be disposed above the common electrode or may be disposed under the common electrode. However, it should be noted that whether the pixel electrode is disposed above the common electrode or below the common electrode, the width of the strip groove on the transparent conductive layer located at the lower position is smaller than that on the transparent conductive layer located above. The width of the strip groove, that is, the width of the first strip groove 4021 on the first transparent conductive layer 402 is smaller than the width of the second strip groove 4041 on the second transparent conductive layer 404.

6 and 7 are schematic views showing the distribution of liquid crystal molecules and electric fields when the display screen of the display device having the array substrate of the embodiment of the present invention is a positive frame and a negative frame, respectively. The following description is made by taking the case where the first transparent conductive layer 402 in FIG. 6 and FIG. 7 is a common electrode and the second transparent conductive layer 404 is a pixel electrode.

As shown in FIG. 6, when the display screen of the display device is a positive frame, the potential of the pixel electrode 404 is high. At the potential of the common electrode 402, the electric field line is emitted from the pixel electrode 404 having a high potential, and is terminated at the common electrode 402 having a low potential. Due to the presence of the first strip-shaped groove 4021 on the common electrode 402, the terminating electric field lines are distributed approximately horizontally to the common electrodes 402 on both sides in the middle portion of the second strip-shaped groove 4041. It can be understood that when the voltages of the pixel electrode and the common electrode are given, the magnitude of the electric field at any point in the space is given, and when the horizontal component of the electric field is increased, the vertical component of the electric field at the point is decreased (electric field) It is a vector, the horizontal component and the vertical component are combined to form the electric field of the point), and thus the above structure can greatly reduce the vertical component of the multi-dimensional electric field.

As shown in FIG. 7, when the display screen of the display device is a negative frame, the potential of the pixel electrode 404 is lower than the potential of the common electrode 402, so the electric field line is emitted from the common electrode 402 having a high potential, and ends at the pixel electrode 404 having a low potential. . Due to the presence of the first strip-shaped groove 4021 on the common electrode 402, the multi-dimensional electric field is bent approximately horizontally toward both sides of the second strip-shaped groove 4041, thereby greatly reducing the vertical component of the multi-dimensional electric field.

Meanwhile, as shown in FIG. 6 and FIG. 7, regardless of whether the display screen of the display device is a positive frame or a negative frame, the arrangement of the liquid crystal molecules is approximately parallel to the pixel electrode 404, and the arrangement is also the same, and does not appear similar to FIG. 2 and FIG. The disordered arrangement of liquid crystal molecules in the TO region shown in the middle.

In the array substrate shown in FIG. 5 above, the first strip-shaped groove 4021 on the first transparent conductive layer 402 is a set of parallel-arranged strip-shaped grooves arranged at equal intervals. Similarly, the second strip-shaped groove 4041 on the second transparent conductive layer 404 is also a set of parallel-arranged strip-shaped grooves; and the oppositely disposed first strip-shaped grooves 4021 and the second strip-shaped grooves 4041 are arranged in parallel.

The array substrate shown in FIG. 4 and FIG. 5 is only one embodiment of the array substrate of the embodiment of the present invention. The array substrate according to the embodiment of the present invention may have other embodiments, which will be exemplified below.

FIG. 8 is a schematic structural view of an array substrate according to a second embodiment of the present invention. The array substrate in this embodiment differs from the array substrate in FIG. 5 in that: the first transparent conductive layer 402 has two sets of first strip-shaped grooves 4021 arranged in parallel at equal intervals. Similarly, the second transparent conductive layer 404 also has two sets of second strip-shaped grooves 4041 arranged in parallel at equal intervals.

Of course, in other embodiments of the present invention, the first transparent conductive layer 402 may further have more than two sets of a plurality of first strip-shaped grooves 4021 arranged in parallel at equal intervals. Similarly, the second transparent conductive layer 404 may have more than two sets of second strip-shaped grooves 4041 arranged in parallel at equal intervals.

FIG. 9 is a schematic structural view of an array substrate according to a third embodiment of the present invention. The array substrate in this embodiment is different from the array substrate in FIG. 8 in that: a first strip groove 4021 and a second strip groove 4041 It is a chute having a preset inclination angle; moreover, the inclination angles of the first strip groove 4021 and the second strip groove 4041 which are oppositely disposed are the same.

For the tilt angle described in this specification, it may be an angle between the strip groove and one side of the pixel electrode or the common electrode. For example, as shown in Fig. 9 or 10, the electrode 402 or 404 has a rectangular shape which may be an angle between the strip groove and the horizontal side of the rectangle. Further, the magnitude of the inclination can be arbitrarily set as needed.

Of course, in other embodiments of the present invention, the first transparent conductive layer 402 may have only a plurality of first strip slots 4021 having a predetermined inclination angle arranged in parallel, or have more groups (more than two). A plurality of first strip-shaped grooves 4021 having a predetermined inclination angle are arranged in parallel at equal intervals. Further, the inclination angles of the first strip grooves 4021 in different groups may be the same or different. Correspondingly, the second transparent conductive layer 404 may also have a plurality of second strip grooves 4041 having a predetermined inclination angle arranged in parallel at equal intervals, or an equal interval parallel arrangement having more groups (more than two groups). A plurality of second strip slots 4041 having a predetermined tilt angle. Further, the inclination angles of the second strip grooves 4041 in different groups may be the same or different. It should be noted that the inclination angles of the first strip groove 4021 and the second strip groove 4041 which are oppositely disposed are kept consistent.

In the above embodiment, the position and width of the first strip groove 4021 and the second strip groove 4041 are set to affect the magnitude of the vertical component, which will be described in detail below.

In the positional setting, preferably, the center of the second strip-shaped groove 4041 is aligned with the center of the correspondingly disposed first strip-shaped groove 4021 in the vertical direction (the direction perpendicular to the substrate).

Preferably, the width of the first strip-shaped groove 4021 is less than one-half of the width of the second strip-shaped groove 4041 and greater than one-third of the width of the second strip-shaped groove 4041.

If the width of the first strip-shaped groove 4021 is too small, such as less than one-third of the second strip-shaped groove 4041, the multi-dimensional electric field in the vicinity of the second strip-shaped groove 4041 still has a large vertical component, and the liquid crystal in the horizontal direction The driving effect is not improved significantly. On the other hand, if the width of the first strip-shaped groove 4021 is too wide, such as greater than one-half of the second strip-shaped groove 4041, since the portion of the first transparent conductive layer 402 extending beyond the second transparent conductive layer 404 is too short, The facing area of the first transparent conductive layer 402 and the second strip-shaped groove 4041 becomes smaller. At this time, the horizontal component of the multi-dimensional electric field in the middle portion of the second strip-shaped groove 4041 becomes weaker, which is driven in the horizontal direction of the liquid crystal. Adverse.

The width of the first strip-shaped groove 4021 can be obtained by electrical simulation calculation, and the width is set such that the horizontal electric field near the center of the second strip-shaped groove 4041 is not weak, and the multi-dimensionality can be significantly reduced. The vertical component of the electric field.

10 is a schematic structural view of an array substrate according to a fourth embodiment of the present invention. The array substrate includes: a substrate 401, a gate line 405, a data line 406 perpendicular to the gate line, a thin film transistor (TFT) 407, and a gate line. 405 is formed at the same time as the common electrode line 408, the common electrode 402, and the pixel electrode 404. The pixel electrode 404 has two sets of second strip-shaped grooves 4041 arranged in parallel at equal intervals, and the common electrode 402 has a plurality of first strip-shaped grooves 4021 arranged at equal intervals parallel to the second strip-shaped grooves 4041.

In the embodiment shown in Fig. 10, the pixel electrode is located above the common electrode as an example.

Since the positive frame and the negative frame of the picture displayed by the display panel are actually determined by the sign of the potential difference between the pixel electrode and the common electrode, the first embodiment of the present invention is provided on the transparent conductive layer located below. The solution of the one-slot slot is applicable to the array substrate with the pixel electrode on the bottom and the common electrode on the bottom, or the array substrate on the lower and the common electrode of the pixel electrode, which can also eliminate the existing display device in the positive frame and the negative frame. The problem that the brightness of the screen is different is displayed.

The embodiment of the invention further provides a display device comprising the array substrate described in any of the above embodiments.

The display device provided by the embodiment of the invention includes a liquid crystal display device and other types of display devices. The liquid crystal display device may be a liquid crystal panel, a liquid crystal television, a mobile phone, a liquid crystal display or the like, and includes a color filter substrate, and the array substrate in any of the above embodiments. Other types of display devices described above, such as electronic paper, do not include a color filter substrate, but include the array substrate in the above embodiment.

In summary, the embodiments of the present invention have the following advantages:

The vertical component of the multi-dimensional electric field is reduced, and the defects of the display screen brightness in the positive frame and the negative frame in the conventional display device are eliminated, and the quality of the display screen is improved.

At least the following array substrate and display device can be provided in accordance with embodiments of the present invention:

(1) An array substrate comprising a substrate, and a first transparent conductive layer, an insulating layer, and a second transparent conductive layer sequentially formed on the substrate, wherein the second transparent conductive layer has a plurality of second strips a groove, the first transparent conductive layer has a first strip-shaped groove opposite to the plurality of second strip-shaped grooves, and a width of the first strip-shaped groove is smaller than a width of the second strip-shaped groove.

(2) The array substrate according to (1), wherein a width of the first strip-shaped groove is less than one-half of a width of the second strip-shaped groove, and is larger than a width of the second strip-shaped groove One third of the.

(3) The array substrate according to (1) or (2), wherein the first strip is provided corresponding to each other The slots and the center of the second strip are aligned in a direction perpendicular to the substrate.

The array substrate according to any one of (1) to (3), wherein the first transparent conductive layer has at least one set of a plurality of first strip-shaped grooves arranged in parallel at equal intervals, the second The transparent conductive layer has at least one plurality of second strip-shaped grooves arranged in parallel at equal intervals.

The array substrate according to any one of (1) to (4), wherein the first strip groove and the second strip groove are chutes having a predetermined inclination angle; The inclination angles of the first strip groove and the second strip groove are the same.

The array substrate according to any one of (1) to (5), wherein the first transparent conductive layer has a plurality of sets of a plurality of first strip-shaped grooves arranged in parallel at equal intervals, in different groups The first strip-shaped grooves have different inclination angles; the second transparent conductive layer has a plurality of sets of second strip-shaped grooves arranged in parallel at equal intervals, and the second strip-shaped grooves in different groups have different inclination angles.

(7) The array substrate according to (5) or (6), wherein at least one of the first transparent conductive layer and the second transparent conductive layer has a substantially rectangular shape, and the tilt angle is An angle between the first strip groove and the second strip groove and one side of the rectangle.

The array substrate according to any one of (1) to (7), wherein the first transparent conductive layer is a pixel electrode, and the second transparent conductive layer is a common electrode.

The array substrate according to any one of (1) to (8), wherein the first transparent conductive layer is a common electrode, and the second transparent conductive layer is a pixel electrode.

(10) A display device comprising the array substrate according to any one of (1) to (9). The above is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. The scope of the present invention is defined by the appended claims.

Claims

Claim

An array substrate comprising a substrate, and a first transparent conductive layer, an insulating layer and a second transparent conductive layer sequentially formed on the substrate, wherein the second transparent conductive layer has a plurality of second strip grooves The first transparent conductive layer has a first strip-shaped groove opposite to the plurality of second strip-shaped grooves, and a width of the first strip-shaped groove is smaller than a width of the second strip-shaped groove.

2. The array substrate of claim 1, wherein a width of the first strip-shaped groove is less than one-half of a width of the second strip-shaped groove and greater than a width of the second strip-shaped groove one third.

The array substrate according to claim 1 or 2, wherein the centers of the first strip grooves and the second strip grooves which are disposed corresponding to each other are aligned in a direction perpendicular to the substrate.

The array substrate according to any one of claims 1 to 3, wherein the first transparent conductive layer has at least one set of a plurality of first strip-shaped grooves arranged in parallel at equal intervals, the second transparent conductive layer There are a plurality of second strip-shaped grooves arranged in parallel at equal intervals.

The array substrate according to any one of claims 1 to 4, wherein the first strip groove and the second strip groove are oblique grooves having a predetermined inclination angle; The strip grooves and the second strip grooves have the same inclination angle.

The array substrate according to any one of claims 1 to 5, wherein the first transparent conductive layer has a plurality of sets of a plurality of first strip-shaped grooves arranged in parallel at equal intervals, the first of the different groups The inclination angle of the strip grooves is different; the second transparent conductive layer has a plurality of sets of second strip grooves arranged in parallel at equal intervals, and the second strip grooves in different groups have different inclination angles.

The array substrate according to claim 5 or 6, wherein at least one of the first transparent conductive layer and the second transparent conductive layer has a substantially rectangular shape, and the tilt angle is the first An angle between the strip groove and the second strip groove and one side of the rectangle.

The array substrate according to any one of claims 1 to 7, wherein the first transparent conductive layer is a pixel electrode, and the second transparent conductive layer is a common electrode.

The array substrate according to any one of claims 1 to 8, wherein the first transparent conductive layer is a common electrode and the second transparent conductive layer is a pixel electrode.

A display device comprising the array substrate according to any one of claims 1 to 9.