CN210626838U - Display panel and display device - Google Patents

Abstract

The application discloses a display panel and a display device. The display panel comprises a color film substrate, an array substrate, a liquid crystal layer and frame glue; the color film substrate comprises a common electrode, the common electrode is attached to the surface of one side of the liquid crystal layer, the array substrate comprises a pixel electrode, the pixel electrode is attached to the surface of the other side of the liquid crystal layer, the pixel electrode comprises a plurality of strip-shaped electrodes, gaps are reserved among the strip-shaped electrodes, and the width of each strip-shaped electrode is between 3.5um and 4 um. This application is through doing the banded electrode width in the pixel electrode 3.5um to 4um within ranges, reduces the influence of pixel electrode pair gamma value for the gamma value that adjusts before the panel production can not receive the influence of pixel electrode processing procedure in production, thereby makes gamma value can be stabilized in suitable within ranges, and people's eye just can observe the picture that is fit for luminance like this, improves the result of use of panel.

Description

Display panel and display device

Technical Field

The application relates to the technical field of display, in particular to a display panel and a display device.

Background

Liquid Crystal Displays (LCDs) have many advantages such as thin body, power saving, no radiation, and are widely used, for example: liquid crystal televisions, mobile phones, Personal Digital Assistants (PDAs), digital cameras, computer screens, notebook computer screens, or the like, are dominant in the field of flat panel displays. An active Thin Film Transistor-liquid crystal display (TFT-LCD) is the most common liquid crystal display in the mainstream market at present, and can be roughly divided into the following according to the driving manner of the liquid crystal: twisted Nematic (TN) or Super Twisted Nematic (STN) types, In-Plane Switching (IPS) types, and Vertical Alignment (VA) types. Among them, the VA mode lcd has a very high contrast ratio compared to other types of lcds, and has a very wide application in large-size displays such as tv.

In the production process of the panel, the gamma value is influenced by the process of the array substrate, the process of the color film substrate and the change of the liquid crystal process, including the width of the pixel electrode, the thickness of the color film substrate and the change of the liquid crystal box. Gamma is affected once these process variations are too large.

SUMMERY OF THE UTILITY MODEL

An object of the present application is to provide a display panel and a display device to reduce an influence on a gamma value.

The application discloses a display panel, which comprises a color film substrate and an array substrate which are oppositely arranged, and a liquid crystal layer and frame glue which are arranged between the color film substrate and the array substrate, wherein the frame glue seals the liquid crystal layer in the display panel; the color film substrate comprises a common electrode, the common electrode is attached to the surface of one side of the liquid crystal layer, the array substrate comprises a pixel electrode, the pixel electrode is attached to the surface of one side, away from the common electrode, of the liquid crystal layer, the pixel electrode comprises a plurality of strip-shaped electrodes, gaps are reserved among the strip-shaped electrodes, and the width of each strip-shaped electrode is between 3.5um and 4 um.

Optionally, the width of the strip electrode is between 3.5um and 3.6 um.

Optionally, the pixel electrode includes a plurality of pixel regions, each pixel region is divided into four domains, and the strip electrodes in two adjacent domains in each pixel region are axisymmetric to each other.

Alternatively, the strip electrodes in each domain are arranged in parallel.

Optionally, the spacing between adjacent strip electrodes in each domain is equal.

Optionally, the width of each strip electrode is equal.

Optionally, the width of the strip-shaped electrode is larger than the width of the gap between the adjacent strip-shaped electrodes.

Optionally, the pixel electrode is made of indium tin oxide.

The application also discloses a display panel, which comprises a color film substrate and an array substrate which are oppositely arranged; the color film substrate comprises a common electrode; the array substrate comprises a pixel electrode, and the pixel electrode faces the common electrode; the pixel electrode comprises a plurality of pixel areas, each pixel area is divided into four domains, each domain comprises a plurality of strip-shaped electrodes arranged in parallel, and the strip-shaped electrodes of two adjacent domains in each pixel area are mutually axisymmetric; the width of the strip electrode is between 3.5um and 4 um.

The application also discloses a display device, which comprises the display panel and a driving circuit for driving the display panel.

This application is done in 3.5um to 4um within range through the banded electrode width with pixel electrode, reduces the influence of pixel electrode pair gamma value for the gamma value that adjusts before the panel production can not receive the influence of pixel electrode processing procedure in production, thereby makes gamma value can be stabilized in suitable within range, and people's eye just can observe the picture that is fit for luminance like this, improves the result of use of panel.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

fig. 1 is a schematic diagram of a display device according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a display panel according to an embodiment of the present application;

FIG. 3 is a graph of gamma value versus width value of a strip electrode according to an embodiment of the present application;

fig. 4 is a schematic diagram of a pixel electrode according to an embodiment of the present application.

100, a display device; 200. a display panel; 210. a color film substrate; 211. a common electrode; 220. an array substrate; 221. a pixel electrode; 222. a pixel region; 223. a domain region; 224. a strip electrode; 230. a liquid crystal layer; 240. frame glue; 300. a drive circuit.

Detailed Description

It is to be understood that the terminology, the specific structural and functional details disclosed herein are for the purpose of describing particular embodiments only, and are representative, but that the present application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implicitly indicating the number of technical features indicated. Thus, unless otherwise specified, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "plurality" means two or more. The terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or combinations thereof may be present or added.

Further, terms of orientation or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, are described based on the orientation or relative positional relationship shown in the drawings, are simply for convenience of description of the present application, and do not indicate that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, fixed connections, removable connections, and integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The application is further described with reference to the drawings and alternative embodiments.

As shown in fig. 1, an embodiment of the present application discloses a display device 100, where the display device 100 includes a display panel 200 for displaying a picture, and a driving circuit 300 for driving the display panel 200.

As shown in fig. 2, an embodiment of the present application discloses a display panel 200, where the display panel 200 is disposed in the display device 100, the display panel 200 includes a color film substrate 210 and an array substrate 220 that are disposed in an opposite manner, and a liquid crystal layer 230 and a sealant that are disposed between the color film substrate 210 and the array substrate 220, and the sealant 240 seals the liquid crystal layer 230 in the display panel 200; the color film substrate 210 includes a common electrode 211, the common electrode 211 is attached to a surface of one side of the liquid crystal layer 230, the array substrate 220 includes a pixel electrode 221, the pixel electrode 221 is attached to a surface of the liquid crystal layer 230, which is away from the common electrode 211, the pixel electrode 221 includes a plurality of strip-shaped electrodes 224, gaps are formed between the strip-shaped electrodes 224, and a width of each strip-shaped electrode 224 is between 3.5um and 4 um. The sensitivity of human eyes to the brightness change of the display picture is related to the brightness of the picture, and the human eyes are more sensitive to the brightness change of the picture when the picture is low in brightness. In the Vertical Alignment (VA) type liquid crystal display panel 200, liquid crystal display is digitally driven, that is, the display screen luminance is divided into several levels, that is, several gray scales. In order to realize that the relationship between the digitalized gray scale number and the brightness change perceived by human eyes is linear, a gray scale-transmittance relationship curve, namely a gamma (gamma) curve, is fit according to a voltage transmittance relationship curve of liquid crystal display. The gamma curve is an exponential curve, and the exponential value of the curve is the gamma value, and the inventor knows that the gamma value is between 2.0 and 2.4, and meets the requirement of human eyes on linear relation between brightness change and gray scale change. When the Gamma value is less than 2.0, human eyes can feel that the display of the panel is bright and the color is pale; when the gamma value is larger than 2.4, people can feel that the display of the panel is dark and the color is not bright enough. The gamma value is a critical optical parameter, and the change of the gamma value directly influences the experience of consumers.

Therefore, before the panel is produced, the panel manufacturer adjusts the gamma value to 2.0 to 2.4 by adjusting the voltage, so that the human eye can observe the display picture with proper brightness. However, the gamma value in the panel production process is affected by the process of the array substrate 220, the process of the color filter substrate 210, and the process variation of the liquid crystal, including the width of the strip electrode 224, the thickness of the color filter substrate 210, and the variation of the liquid crystal cell. In order to reduce the effect of the panel process on the gamma value, the inventor starts from the direction of the width of the strip electrode 224, and tests have found that, when the width (ITO CD) of the strip electrode 224 is between 3.5um and 4um, the effect of the pixel electrode 221 process and even the array substrate 220 process on the gamma value is small, so that the gamma value can be maintained between 2.0 and 2.4.

As shown in fig. 3, fig. 3 is a graph of gamma value and width value of the strip-shaped electrode 224 provided by the inventor, and it is obvious from the graph that when the width value of the strip-shaped electrode 224 is larger, the curve is gentler, the amplitude of the change of the gamma value is smaller, and based on this, the larger the width of the strip-shaped electrode 224 is, the better is. In fig. 3, when the width of the strip electrode 224 is 3.5um, the whole curve becomes steeper, and the slope of the curve is smaller than the corresponding slope of the curve when the width of the strip electrode 224 is smaller than 3.5um, which means that the influence of the pixel electrode 221 on the gamma value becomes smaller when the width of the strip electrode 224 is 3.5um, and the curve of the section where the width of the strip electrode 224 is larger than 3.5um in fig. 3 is more gradual and horizontal, which means that the influence on the gamma value is smaller when the width of the strip electrode 224 is larger than 3.5um, and therefore the width of the strip electrode 224 in this application is not smaller than 3.5 um.

As shown in fig. 4, fig. 4 is a schematic diagram of a pixel region 222 of a pixel electrode 221, where the pixel region 222 includes four domains 223, each domain 223 includes a plurality of strip electrodes 224, and a gap exists between adjacent strip electrodes 224. It is mentioned above that the width of the strip-shaped electrode 224 is not less than 3.5um, but when the width of the strip-shaped electrode 224 is too large, the gap between the adjacent strip-shaped electrodes 224 is reduced, and when the gap between the adjacent strip-shaped electrodes 224 is too small, the gaps are not easy to be etched away by the pixel electrode 221 during etching, so that the pixel electrodes 221 are connected together, thereby affecting the driving effect on the liquid crystal, and therefore, the width of the strip-shaped electrode 224 needs to be limited. The inventor has experimentally tested that when the width of the strip-shaped electrode 224 is not more than 4um, the strip-shaped electrode 224 in the pixel electrode 221 can be etched during production, and when the width of the strip-shaped electrode 224 exceeds 4um, the strip-shaped electrode 224 in the transparent electrode cannot be etched during production, so that the finally formed transparent electrode is a complete plane, not a hollow shape, and from the viewpoint of manufacturing process, it is not feasible to make the width of the strip-shaped electrode 224 more than 4 um.

More specifically, the width of the strip electrode 224 can be directly made to be 3.5um to 3.6um, because it can be seen from fig. 3 that the turning point of the curve is that when the width of the strip electrode 224 is at the node of 3.5um, the curve is steeper when the width of the strip electrode 224 is less than 3.5um, and the curve is shallower when the width of the strip electrode 224 is greater than 3.5 um; and the width of the strip electrode 224 in the curve is almost horizontal in the portion of 3.5um to 3.6um, which shows that the influence on the gamma value is almost the same when the width of the strip electrode 224 is between 3.5um to 3.6um, so that the condition of having a larger influence on the gamma value can be satisfied when the width of the strip electrode 224 is between 3.5um to 3.6 um. In addition, the width of the strip-shaped electrode 224 can be 3.5um, when the width of the strip-shaped electrode 224 is 3.5um, the gap between the adjacent strip-shaped electrodes 224 is large, so that the pixel electrode 221 can be conveniently etched, and a certain error can be allowed to exist, so that the problem that when the width of the strip-shaped electrode 224 is slightly large due to the error existing in the process of etching the pixel electrode 221, the pixel electrode 221 cannot meet the requirement, and the product yield is reduced. Therefore, the width of the strip electrode 224 is selected to be 3.5um, which satisfies the condition of less influence on the gamma value, facilitates the processes of etching the pixel electrode 221, and allows a certain error range.

The stripe electrodes 224 of two adjacent domains 223 in each pixel region 222 are axisymmetric to each other, and as shown in fig. 4, the stripe electrodes 224 in the upper and lower domains are axisymmetric to each other, and the stripe electrodes 224 in the left and right domains are also axisymmetric to each other, so that the liquid crystal molecules in the liquid crystal layer 230 attached to the pixel electrode 221 are the same in the angle of deflection from either direction under the same electric field intensity, and different brightness does not occur in one electric field. Therefore, the pixel electrode 221 provided by the present application can make the screen display of the panel uniform.

Moreover, the strip electrodes 224 in each domain 223 are arranged in parallel, and firstly, when a mask of the pixel electrode 221 is manufactured, because the strip electrodes 224 are arranged in parallel, gaps between the strip electrodes 224 are also arranged in parallel, when a hollow structure on the mask is manufactured, a bending structure does not need to be manufactured, and when a hollow structure of one domain 223 is manufactured, only one direction is needed, so that the manufacturing is simpler. In addition, when the pixel electrodes 221 are energized in the use state, the strip electrodes 224 arranged in parallel are less likely to be short-circuited, and the influence of capacitance between the strip electrodes 224 is small.

The width of each of the strip-shaped electrodes 224 is equal at all positions, so that the electric field distribution in the whole pixel electrode 221 is relatively uniform, because when the voltages passed by the strip-shaped electrodes 224 are the same, the electric field intensity at all positions is the same, so that the liquid crystal molecules are deflected more uniformly. Furthermore, the distances between the adjacent strip-shaped electrodes 224 in each domain 223 are equal, so that the mask for manufacturing the pixel electrode 221 is easier to manufacture, the width of each strip-shaped electrode 224 and the distance between the adjacent strip-shaped electrodes 224 do not need to be adjusted, the manufacturing speed of the mask is increased, and the production efficiency is indirectly improved; and the electric field at all positions of the whole pixel electrode 221 can be controlled to be uniform, thereby improving the quality of the display picture. Moreover, the width of the strip electrodes 224 in the present application is larger than the width of the gap between adjacent strip electrodes 224. Since the pixel electrode 221 needs to be energized to generate an electric field, and the strip-shaped electrode 224 is a main part of the pixel electrode 221 that generates the electric field, if the strip-shaped electrode 224 is densely distributed, the electric field intensity generated by the pixel electrode 221 when energized is large, which raises the conduction efficiency; on the other hand, if the band electrodes 224 in the pixel electrodes 221 are dispersed, that is, if the gap between the band electrodes 224 and the band electrodes 224 is too large, a larger voltage needs to be applied to the pixel electrodes 221 to achieve a certain electric field strength between the two substrates, which results in energy waste. If the width of the strip-shaped electrode 224 is larger than the width of the gap between the adjacent strip-shaped electrodes 224, it is indicated that the area of the strip-shaped electrode 224 in each domain is larger than the area of the blank area, which can provide better electric field effect.

Since the inventor knows that the gamma value of the display panel 200 should be between 2.0 and 2.4, so that the brightness observed by human eyes is the best, even if the width of the strip-shaped electrode 224 in the pixel electrode 221 is changed, the corresponding gamma value is between 2.0 and 2.4 in the present application, and the inventor has tested that the gamma value is 2.2 ± 0.1 when the width of the strip-shaped electrode 224 is between 3.5um and 4um, which meets the requirement.

As another embodiment of the present application, a display panel 200 is disclosed, where the display panel 200 includes a color film substrate 210 and an array substrate 220 that are oppositely disposed; the color film substrate 210 includes a common electrode 211; the array substrate 220 comprises a pixel electrode 221, and the pixel electrode 221 faces the common electrode 211; the pixel electrode 221 includes a plurality of pixel regions 222, each pixel region 222 is divided into four domains 223, each domain 223 includes a plurality of strip electrodes 224 arranged in parallel, and the strip electrodes 224 of two adjacent domains 223 in each pixel region 222 are mutually axisymmetric; the width of the strip electrodes 224 is between 3.5um and 4 um.

The foregoing is a more detailed description of the present application in connection with specific alternative embodiments, and the present application is not intended to be limited to the specific embodiments shown. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.

Claims (10)

1. A display panel, comprising:

a color film substrate;

the array substrate is arranged opposite to the color film substrate;

the liquid crystal layer is arranged between the color film substrate and the array substrate; and

the frame glue is arranged between the color film substrate and the array substrate and seals the liquid crystal layer in the display panel;

the color film substrate comprises a common electrode, the common electrode is attached to the surface of one side of the liquid crystal layer, the array substrate comprises a pixel electrode, and the pixel electrode is attached to the surface of one side, away from the common electrode, of the liquid crystal layer;

the pixel electrode comprises a plurality of strip electrodes, gaps are reserved between the strip electrodes, and the width of each strip electrode is between 3.5um and 4 um.

2. The display panel of claim 1, wherein the strip electrodes are between 3.5um and 3.6um wide.

3. The display panel according to claim 1, wherein the pixel electrode includes a plurality of pixel regions, each pixel region is divided into four domains, and the strip electrodes of two adjacent domains in each pixel region are axisymmetric to each other.

4. A display panel as claimed in claim 3 characterized in that the strip electrodes in each domain are arranged in parallel.

5. The display panel according to claim 3, wherein intervals of adjacent strip electrodes in each domain are equal.

6. The display panel of claim 1, wherein the width of each of the strip electrodes is equal throughout.

7. The display panel of claim 1, wherein a width of the strip electrodes is greater than a width of a gap between adjacent strip electrodes.

8. The display panel according to claim 1, wherein a material of the pixel electrode is indium tin oxide.

9. A display panel is characterized by comprising a color film substrate and an array substrate which are oppositely arranged;

the color film substrate comprises a common electrode;

the array substrate comprises a pixel electrode, and the pixel electrode faces the common electrode; the pixel electrode comprises a plurality of pixel areas, each pixel area is divided into four domains, each domain comprises a plurality of strip-shaped electrodes arranged in parallel, and the strip-shaped electrodes of two adjacent domains in each pixel area are mutually axisymmetric;

the width of the strip electrode is between 3.5um and 4 um.

10. A display device comprising the display panel according to any one of claims 1 to 9, and a driving circuit which drives the display panel.

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