CN107247371B - Pixel electrode structure of liquid crystal display panel and liquid crystal display panel - Google Patents
Pixel electrode structure of liquid crystal display panel and liquid crystal display panel Download PDFInfo
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- CN107247371B CN107247371B CN201710660594.2A CN201710660594A CN107247371B CN 107247371 B CN107247371 B CN 107247371B CN 201710660594 A CN201710660594 A CN 201710660594A CN 107247371 B CN107247371 B CN 107247371B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
Abstract
The embodiment of the invention discloses a pixel electrode structure of a liquid crystal display panel, which is characterized by comprising the following components: a first trunk electrode extending in a transverse direction; the second main electrode extends along the longitudinal direction and is intersected with the first main electrode to form 4 liquid crystal alignment regions; the liquid crystal alignment device comprises a liquid crystal alignment area, a plurality of branch electrodes and a plurality of liquid crystal alignment layers, wherein the liquid crystal alignment area is provided with a liquid crystal layer, the liquid crystal layer is arranged on the liquid crystal layer, the plurality of branch electrodes are distributed in the liquid crystal alignment area, one end of each branch electrode is connected with one of the first main electrode and the second main electrode, the plurality of branch electrodes comprise first branch electrodes. The embodiment of the invention also discloses a liquid crystal display panel. The invention has the advantage of improving the color cast of the liquid crystal display panel at low temperature.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a pixel electrode structure of a liquid crystal display panel and the liquid crystal display panel.
Background
With the development of thin film transistor liquid crystal displays and the progress of industrial technology, the manufacturing process of liquid crystal displays is becoming more and more perfect, and the manufacturing cost of liquid crystal displays is also becoming lower and lower. Liquid crystal displays have replaced cathode ray tube displays as the mainstream display in the everyday display field. However, the low gray scale color shift (low color) of the lcd causes serious distortion of the display screen, which causes a problem in further popularization of the lcd.
In order to improve the low color problem of the liquid crystal display, the prior art proposes that the pixel structure is changed from 4 domains (4 liquid crystal alignment regions) to 8 domains (8 liquid crystal alignment regions), wherein 8 domains divide the pixel into two parts, one part is a main (main) display region, and the other part is an auxiliary (Sub) display region. When the panel works, the brightness of the main display area is higher, the brightness of the auxiliary display area is lower, and the low color problem of the liquid crystal display is improved through the main display area and the auxiliary display area with different brightness, so that the wide viewing angle characteristic of the liquid crystal display is improved. However, since the auxiliary display area is large (occupies about 60% of the pixel opening area), the transmittance of the whole pixel structure is greatly sacrificed, the power consumption of the backlight is increased, and the current concept of environmental protection and energy saving is not met. In addition, because the main display area is high-brightness and the auxiliary display area is low-brightness, the high-brightness and the low-brightness are respectively over-concentrated, so that the brightness difference of the two areas is over-obvious, and the visual effect is poor. Therefore, the effect of improving the low color problem of the liquid crystal display panel by changing 4domain into 8domain in the prior art is poor.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a pixel electrode structure of a liquid crystal display panel and a liquid crystal display panel. The color cast problem of the liquid crystal display panel at low temperature can be improved.
In order to solve the above technical problem, an embodiment of the present invention provides a pixel electrode structure of a liquid crystal display panel, including:
a first trunk electrode extending in a transverse direction;
the second main electrode extends along the longitudinal direction and is intersected with the first main electrode to form 4 liquid crystal alignment regions;
the liquid crystal alignment device comprises a liquid crystal alignment area, a plurality of branch electrodes and a plurality of liquid crystal alignment layers, wherein the liquid crystal alignment area is provided with a liquid crystal layer, the liquid crystal layer is arranged on the liquid crystal layer, the plurality of branch electrodes are distributed in the liquid crystal alignment area, one end of each branch electrode is connected with one of the first main electrode and the second main electrode, the plurality of branch electrodes comprise first branch electrodes.
In an embodiment of the first aspect of the present invention, a line width of the first branch electrode at a end close to the first main electrode or the second main electrode is smaller than a line width of the first branch electrode at a end far from the first main electrode or the second main electrode.
In an embodiment of the first aspect of the present invention, the first branch electrode includes a first line width and a second line width, the first line width is smaller than the second line width, the first branch electrode is connected to the second main electrode at a portion of the second line width, and the first branch electrode is away from the second main electrode at a portion of the first line width.
In an embodiment of the first aspect of the present invention, the plurality of branch electrodes further includes a second branch electrode and a third branch electrode, the second branch electrodes are all set to have a second line width, the second branch electrodes are connected to the first main electrode, the third branch electrodes are all set to have a first line width, and the third branch electrodes are connected to the second main electrode.
In an embodiment of the first aspect of the present invention, the first branch electrode is sandwiched between the second branch electrode and the third branch electrode in the same liquid crystal alignment region.
In an embodiment of the first aspect of the present invention, at least one of the positions between the adjacent second branch electrodes, the position between the adjacent first branch electrodes having the second line width, and the position between the second branch electrode and the adjacent first branch electrode having the second line width in the same liquid crystal alignment region is connected by a bridge electrode.
In the first embodiment of the present invention, the boundary between the second line width portion and the first line width portion of the first branch electrode in the same liquid crystal alignment region is a straight line, and the angle between the straight line and the horizontal line is 30 ° to 75 °.
In an embodiment of the first aspect of the present invention, 4 of the liquid crystal alignment regions are each provided with a first branch electrode, a second branch electrode and a third branch electrode.
In an embodiment of the first aspect of the present invention, the first line width has a size in a range of 2.5 μm to 3.5 μm, or the second line width has a size in a range of 3.5 μm to 5.0 μm.
In a second aspect of the present invention, a liquid crystal display panel is provided, which includes the pixel electrode structure of the liquid crystal display panel.
The embodiment of the invention has the following beneficial effects:
the plurality of branch electrodes comprise first branch electrodes, the first branch electrodes are provided with at least two line widths in the extending direction of the first branch electrodes, so that the electric field distribution near the first branch electrodes is different, the liquid crystal deflection above the pixel structure is different, and the problem of color cast of the liquid crystal display panel under low gray scale is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a partial schematic view of a pixel electrode structure according to an embodiment of the invention (not including a portion of the branch electrode with the first width);
FIG. 2 is a diagram illustrating a pixel electrode structure according to an embodiment of the present invention;
FIG. 3 is a diagram of a pixel electrode structure including a bridge electrode according to an embodiment of the present invention;
reference numbers of the drawings:
110-a first trunk electrode; 120-a second trunk electrode; 131-a first branch electrode; 132-a second branch electrode; 133-a third branch electrode; 141-a first liquid crystal alignment region; 142-a second liquid crystal alignment region; 143-a third liquid crystal alignment region; 144-a fourth liquid crystal alignment region; 150-bridging electrodes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "comprising" and "having," and any variations thereof, as appearing in the specification, claims and drawings of this application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third," etc. are used to distinguish between different objects and are not used to describe a particular order.
An embodiment of the invention provides a pixel electrode structure of a liquid crystal display panel, please refer to fig. 1 and fig. 2, the pixel electrode structure includes a first main electrode 110, a second main electrode 120 and a plurality of branch electrodes. The first main electrode 110 extends along a transverse direction, that is, along the X-axis direction, and the first main electrode 110 is made of an ITO material. The second main electrode 120 extends along a longitudinal direction, that is, along a Y-axis direction, the second main electrode 120 is made of an ITO material, the second main electrode 120 intersects with the first main electrode 110 to form 4 liquid crystal alignment regions (4 domains), in this embodiment, the second main electrode 120 intersects with the first main electrode 110 perpendicularly to form 4 liquid crystal alignment regions, the areas of the 4 liquid crystal alignment regions are equal, and the 4 liquid crystal alignment regions are referred to as a first liquid crystal alignment region 141, a second liquid crystal alignment region 142, a third liquid crystal alignment region 143, and a fourth liquid crystal alignment region 144 according to an upper left corner, an upper right corner, a lower left corner, and a lower right corner. The plurality of branch electrodes are distributed in the liquid crystal alignment region, in this embodiment, the plurality of branch electrodes are equally distributed in 4 liquid crystal alignment regions, the inner end of each branch electrode is connected to one of the first main electrode 110 and the second main electrode, in this embodiment, the branch electrodes are also made of ITO material, and are located in the same layer as the first main electrode 110 and the second main electrode 120, and a gap exists between adjacent branch electrodes. In this embodiment, the branch electrodes in the same liquid crystal alignment region are arranged in parallel, and the included angle between the branch electrodes and the horizontal line is generally set to 45 °, although in other embodiments of the present invention, the included angle between the branch electrodes and the horizontal line may be set to other angles, such as 30 ° to 60 °.
In order to improve the problem of color cast (low color) under the low gray scale of the lcd panel with 4domain pixel structure, in this embodiment, the plurality of branch electrodes include a first branch electrode 131, the first branch electrode 131 is provided with at least two line widths in the extending direction thereof, for example, two line widths, three line widths, four line widths, etc., and the central lines of the different line widths of the same first branch electrode 131 are on the same straight line. The first branch electrode 131 has different line widths in the extending direction, so that the electric field distribution near the first branch electrode 131 is different, for example, the electric field distribution at different widths is different, so that the liquid crystal deflection above the pixel structure is different, which is beneficial to improving the problem of color cast of the liquid crystal display panel under low gray scale.
In this embodiment, a line width of the end of the first branch electrode 131 close to the first main electrode 110 or the second main electrode 120 is smaller than a line width of the end of the first branch electrode 131 far from the first main electrode 110 or the second main electrode, that is, a line width of the end of the first branch electrode 131 close to the first main electrode 110 or the second main electrode 120 is smaller, and a line width of the end far from the first main electrode 110 or the second main electrode 120 is larger. Based on the considerations of manufacturing process and cost, in the embodiment, the first branch electrode 131 has two line widths in the extending direction, i.e., a first line width and a second line width, the first line width is smaller than the second line width, the first line width has a width in a range of 2.5 μm to 3.5 μm, such as 2.5 μm, 2.6 μm, 2.7 μm, 2.8 μm, 2.9 μm, 3.0 μm, 3.1 μm, 3.2 μm, 3.3 μm, 3.4 μm, 3.5 μm, etc., and the second line width has a size in a range of 3.5 μm to 5.0 μm, such as 3.5 μm, 3.6 μm, 3.7 μm, 3.8 μm, 3.9 μm, 4.0 μm, 4.1 μm, 4.2 μm, 4.3 μm, 4.4 μm, 4.5 μm, 4.8 μm, 4.9 μm, 4.0 μm, 4.5 μm, 4 μm, 4.5 μm, 4.8 μm, etc. The first branch electrode 131 is connected to the second main electrode 120 at a portion with a second line width, the first branch electrode 131 is a portion with a first line width away from the second main electrode 120, the first branch electrode 131 in the first liquid crystal alignment region 141 is used for illustration, in the first liquid crystal alignment region 141, the right end portion of the first branch electrode 131 is the second line width, the right end portion is connected to the second main electrode 120, the left end portion of the first branch electrode 131 is the first line width, and the left end portion is disposed away from the second main electrode 120. In this embodiment, the first branched electrode 131 is designed in such a way, so that the problem of low color in the left-right direction can be further improved.
In this embodiment, the plurality of branch electrodes further includes a second branch electrode 132 and a third branch electrode 133, the second branch electrodes 132 are all set to have a second line width, that is, the line widths of the second branch electrodes 132 at different positions are the same, the line width of the second branch electrodes 132 is wider, and the second branch electrodes 132 are connected to the first main electrode 110; the third branch electrodes 133 are all set to have a first line width, that is, the line widths of the third branch electrodes 133 at various positions are the same, the line width of the third branch electrodes 133 is narrower, and the third branch electrodes 133 are connected to the second main electrode 120.
In this embodiment, the first branch electrode 131 is sandwiched between the second branch electrode 132 and the third branch electrode 133 in the same liquid crystal alignment region, and the first liquid crystal alignment region 141 is taken as an example for explanation, the left-part branch electrodes are the second branch electrodes 132, the middle-part branch electrodes are the first branch electrodes 131, the right-part branch electrodes are the third branch electrodes 133, and the first branch electrodes 131 are sandwiched therebetween. In this embodiment, the other 3 liquid crystal alignment regions are provided with a first branch electrode 131, a second branch electrode 132 and a third branch electrode 133, specifically, the branch electrode in the second liquid crystal alignment region 142 is axisymmetric to the branch electrode in the first liquid crystal alignment region 141, and the symmetry axis is the central axis of the second main electrode 120; the branch electrode in the third liquid crystal alignment region 143 is axisymmetric to the branch electrode in the first liquid crystal alignment region 141, and the symmetry axis is the central axis of the first main electrode 110; the branch electrodes in the fourth liquid crystal alignment region 144 and the branch electrodes in the second liquid crystal alignment region 142 are axisymmetric, and the symmetry axis is the central axis of the first main electrode 110. Through the design, the problem of low color in the left and right directions of the liquid crystal display panel can be excellently solved, and meanwhile, the penetration rate cannot be reduced. In addition, in other embodiments of the present invention, the branch electrodes in the second liquid crystal alignment region, the third liquid crystal alignment region, and the fourth liquid crystal alignment region may be arranged in other manners, for example, all the branch electrodes in one liquid crystal alignment region are the first branch electrode, the second branch electrode, or the third branch electrode.
In addition, in the present embodiment, the boundary between the second line width portion and the first line width portion of the first branch electrode 131 in the same liquid crystal alignment region is a straight line, the included angle between the straight line and the horizontal line is 30 ° to 75 °, and the first liquid crystal alignment region 141 is taken as an example for explanation, in the first liquid crystal alignment region 141, the boundary between the second line width portion and the first line width portion of the first branch electrode 131 is a straight line, the included angle between the straight line and the first main electrode 110 is 30 ° to 75 °, and in the present embodiment, about 60 °.
In addition, referring to fig. 3, in order to increase the transmittance, in the present embodiment, at least one of the portions between the adjacent second branch electrodes 132, the portion between the adjacent first branch electrodes 131 and having the second line width, and the portion between the second branch electrodes 132 and the adjacent first branch electrodes 131 and having the second line width is connected by a bridge electrode 150 in the same liquid crystal alignment region, specifically, the adjacent second branch electrodes 132 in the same liquid crystal alignment region are connected through a bridge electrode 150, the second diverging electrode 132 is connected to the second line portion of the adjacent first diverging electrode 131 by a bridge electrode 150, the second line width portions of the first diverging electrodes 131 are connected to each other by the bridging electrode 150, and by this design, the relative area of the strong electric field can be increased, and the penetration rate is improved to a certain extent under the condition that the pixel aperture ratio is not changed. In this embodiment, the bridging electrode 150 is also made of ITO, and the bridging electrode 150 and the branch electrode are located on the same layer. In addition, in other embodiments of the present invention, only the adjacent second branch electrodes in the same liquid crystal alignment region may be connected by a bridge electrode, or only the portions of the adjacent first branch electrodes having the second line width may be connected by a bridge electrode, or the portions of the branch electrodes having a wider portion may be connected to each other in other manners.
In addition, in other embodiments of the present invention, a liquid crystal display panel is further provided, where the liquid crystal display panel includes the pixel electrode structure of the liquid crystal display panel.
It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
Through the description of the above embodiments, the present invention has the following advantages:
the plurality of branch electrodes comprise first branch electrodes, the first branch electrodes are provided with at least two line widths in the extending direction of the first branch electrodes, so that the electric field distribution near the first branch electrodes is different, the liquid crystal deflection above the pixel structure is different, and the problem of color cast of the liquid crystal display panel under low gray scale is improved.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (7)
1. A pixel electrode structure of a liquid crystal display panel, comprising:
a first trunk electrode extending in a transverse direction;
the second main electrode extends along the longitudinal direction and is intersected with the first main electrode to form 4 liquid crystal alignment regions;
the liquid crystal alignment device comprises a liquid crystal alignment area, a plurality of branch electrodes and a plurality of liquid crystal alignment layers, wherein the liquid crystal alignment area is provided with a liquid crystal layer;
the first branch electrode comprises a first line width and a second line width, the first line width is smaller than the second line width, the first branch electrode is connected with the second main electrode through a part of the first line width, the first branch electrode is far away from the second main electrode through a part of the second line width, the plurality of branch electrodes further comprise a second branch electrode and a third branch electrode, the second branch electrode is set to be the second line width, and the third branch electrode is set to be the first line width;
in the same liquid crystal alignment region, the adjacent second branch electrodes are connected by a bridge electrode, the second branch electrodes are connected with the second line width parts of the adjacent first branch electrodes by a bridge electrode, the second line width parts of the first branch electrodes are connected by a bridge electrode, the bridge electrodes are not arranged between the third branch electrodes and the first and second branch electrodes, the arrangement positions of the plurality of bridge electrodes are distributed in a curve, the bridge electrodes electrically connect one end of the first branch electrode away from the first trunk electrode or the second trunk electrode to increase the relative area of a strong electric field, and the bridge electrodes and the first branch electrodes are located in the same layer.
2. The pixel electrode structure of the liquid crystal display panel according to claim 1, wherein the second branch electrode is connected to the first main electrode, and the third branch electrode is connected to the second main electrode.
3. The pixel electrode structure of claim 2, wherein the first branch electrode is sandwiched between the second branch electrode and the third branch electrode in the same liquid crystal alignment region.
4. The pixel electrode structure of claim 3, wherein the boundary between the second line width portion and the first line width portion of the first branch electrode in the same liquid crystal alignment region is a straight line, and the angle between the straight line and the horizontal line is 30 ° -75 °.
5. The pixel electrode structure of the liquid crystal display panel according to claim 3, wherein 4 of the liquid crystal alignment regions are provided with a first branch electrode, a second branch electrode and a third branch electrode.
6. The pixel electrode structure of the LCD panel according to any of claims 2-5, wherein the first line width has a size in a range of 2.5 μm to 3.5 μm, or the second line width has a size in a range of 3.5 μm to 5.0 μm.
7. A liquid crystal display panel comprising the pixel electrode structure of the liquid crystal display panel according to any one of claims 1 to 6.
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| CN108227316A (en) * | 2018-02-26 | 2018-06-29 | 惠科股份有限公司 | Display panel and curved-surface display device |
| CN109917592B (en) * | 2019-03-11 | 2021-04-23 | Tcl华星光电技术有限公司 | Pixel electrode and liquid crystal display panel |
| CN111538189B (en) * | 2020-05-25 | 2023-05-02 | Tcl华星光电技术有限公司 | Pixel electrode and liquid crystal display panel |
| CN114660865A (en) * | 2022-03-24 | 2022-06-24 | Tcl华星光电技术有限公司 | Array substrate and display device |
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| KR20170001840A (en) * | 2015-06-26 | 2017-01-05 | 삼성디스플레이 주식회사 | Array substrate and display device including the same |
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