CN103852940A - Pixel unit and array substrate for FFS (Fringe Field Switching)-mode LCD (Liquid Crystal Display) device - Google Patents
Pixel unit and array substrate for FFS (Fringe Field Switching)-mode LCD (Liquid Crystal Display) device Download PDFInfo
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- CN103852940A CN103852940A CN201210520882.5A CN201210520882A CN103852940A CN 103852940 A CN103852940 A CN 103852940A CN 201210520882 A CN201210520882 A CN 201210520882A CN 103852940 A CN103852940 A CN 103852940A
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Abstract
The invention discloses a pixel unit for an FFS (Fringe Field Switching)-mode LCD (Liquid Crystal Display) device. The pixel unit comprises a pixel electrode, a common electrode and an insulation layer, wherein the insulation layer is arranged between the pixel electrode and the common electrode; the common electrode is a planar electrode which is in opposite arrangement with the pixel electrode; the pixel electrode comprises an end electrode, a first strip-shaped electrode, a second strip-shaped electrode and a third strip-shaped electrode, the first strip-shaped electrode, the second strip-shaped electrode and the third strip-shaped electrode are parallelly arranged, the second strip-shaped electrode is arranged between the first strip-shaped electrode and the third strip-shaped electrode, and the end electrode is in an arc shape and is connected with the end parts of the first strip-shaped electrode and the third strip-shaped electrode. According to the pixel unit disclosed by the invention, the end electrode is set into the arc shape, thus the arrangement of liquid crystal molecules in a fringe position is stably controlled, and the phenomenon of disclination lines can be restrained from happening.
Description
Technical field
The present invention relates to technical field of liquid crystal display, relate in particular to a kind of for fringe field switching mode LCD pixel cell and array base palte.
Background technology
At Thin Film Transistor-LCD (Thin Film Transistor Liquid Crystal Display, be called for short TFT-LCD) in product, fringe field switching technology (Fringe Field Switching, be called for short FFS) can improve aperture opening ratio and the transmissivity of plane internal switch (In-Plane-Switching, be called for short IPS) mode LCD.
The liquid crystal display of FFS pattern comprises public electrode and pixel electrode, the controlled distance being less than between lower glass substrate that is made as of distance between public electrode and pixel electrode, to can form fringing field between public electrode and pixel electrode, thus, can control the liquid crystal molecule that is positioned at pixel electrode top, overcoming electric field directly over traditional IPS liquid crystal display pixel electrode is vertical direction, the uncontrolled defect of liquid crystal molecule, has improved aperture opening ratio and the transmissivity of liquid crystal display greatly.
Fig. 1 is the end face schematic diagram of the liquid crystal display pixel unit of existing FFS pattern.Fig. 2 is the schematic cross-section of the liquid crystal display pixel unit of existing FFS pattern.As depicted in figs. 1 and 2, pixel cell 10 comprises pixel electrode 11, the planar public electrode 12 of pectination and is arranged on insulation course 13 between the two.Wherein, pixel electrode 11 comprises the multiple strip shaped electric poles 111 that be arranged in parallel and the termination electrode 112 that is connected strip electrode tip.Form after voltage differences applying different voltage between pixel electrode 11 and public electrode 12, termination electrode 112 can and public electrode 12 form respectively electric field component E in Y-direction (being the direction of the extension of described strip shaped electric poles) and Z the direction direction of public electrode plane (perpendicular to)
yand E
z.The existence of above-mentioned electric field component can make pixel cell edge Liquid Crystal Molecules Alignment unstable, and particularly, the electric field component of Y-direction can affect the rotation direction of liquid crystal molecule in XY plane, causes disclination (Disclination lines) phenomenon; Meanwhile, the electric field component of Z direction can make liquid crystal molecule in the skew of Z direction, causes disorderly row's phenomenon.
Summary of the invention
Technical matters to be solved by this invention is to propose a kind of pixel cell for fringe field switching mode LCD, array base palte, the disclination problem that the pixel cell edge that reduction or elimination termination electrode cause occurs.
For reaching this object, the present invention by the following technical solutions:
For a pixel cell for fringe field switching mode LCD, described pixel cell comprise pixel electrode, public electrode and be arranged on pixel electrode and public electrode between insulation course;
Described public electrode is the plane-shape electrode being oppositely arranged with described pixel electrode;
Described pixel electrode comprises termination electrode and the first strip shaped electric poles, the second strip shaped electric poles, the Article 3 shape electrode that be arranged in parallel, wherein said the second strip shaped electric poles is arranged between described the first strip shaped electric poles and described Article 3 shape electrode, and described termination electrode is shaped as circular arc and connect described the first strip shaped electric poles and the end of described Article 3 shape electrode.
Further, described the second strip shaped electric poles is connected with described termination electrode.
Further, described the second strip shaped electric poles is not connected with described termination electrode.
Further, described pixel electrode and described public electrode are transparency electrode.
Further, described pixel electrode and described public electrode have voltage difference, thereby produce electric field between described pixel electrode and described public electrode.
Accordingly, the invention allows for a kind of array base palte for fringe field switching mode LCD, described array base palte comprises:
The grid line and the data line that intersect, described grid line and data line limit pixel region;
Be arranged on the switching device of grid line and data line crossover location;
Be positioned at the pixel electrode of pixel region;
Cover the public electrode of described array base palte; And
Be arranged at the insulation course between described pixel electrode and public electrode;
Wherein, described public electrode is the plane-shape electrode being oppositely arranged with described pixel electrode;
Described pixel electrode comprises termination electrode and the first strip shaped electric poles, the second strip shaped electric poles, the Article 3 shape electrode that be arranged in parallel, described the second strip shaped electric poles is arranged between described the first strip shaped electric poles and described Article 3 shape electrode, and described termination electrode is shaped as circular arc and connect described the first strip shaped electric poles and the end of described Article 3 shape electrode.
Further, described the second strip shaped electric poles is connected with described termination electrode.
Further, described the second strip shaped electric poles is not connected with described termination electrode.
Further, described pixel electrode and described public electrode are transparency electrode.
Further, described pixel electrode and described public electrode have voltage difference, thereby produce electric field between described pixel electrode and described public electrode.
The technical scheme that the present invention proposes is set to circular arc by described termination electrode, makes the electric field component E forming in Y-direction due to termination electrode
ycancel out each other, control arranging of edge's liquid crystal molecule thereby stablized, suppressed the appearance of disclination phenomenon.
Brief description of the drawings
Fig. 1 is the end face schematic diagram of the liquid crystal display pixel unit of existing FFS pattern;
Fig. 2 is the schematic cross-section of the liquid crystal display pixel unit of existing FFS pattern;
Fig. 3 is the end face schematic diagram according to the pixel cell of first embodiment of the invention;
Fig. 4 is according to the schematic cross-section of the pixel cell of first embodiment of the invention;
Fig. 5 is the end face schematic diagram according to the pixel cell of second embodiment of the invention;
Fig. 6 is according to the schematic cross-section of the pixel cell of second embodiment of the invention;
Fig. 7 a is the luminosity distribution schematic diagram of the pixel cell of existing FFS liquid crystal indicator;
Fig. 7 b is the luminosity distribution schematic diagram according to the pixel cell of second embodiment of the invention;
Fig. 8 a is the liquid crystal molecule distribution plan of pixel cell in the C point XZ of place plane that emulation obtains existing FFS liquid crystal indicator;
Fig. 8 b is that the pixel cell of the second embodiment of the invention that obtains of emulation is at the liquid crystal molecule distribution plan of C point position XZ plane;
Fig. 9 is the end face schematic diagram of the array base palte of fifth embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, in accompanying drawing, only show part related to the present invention but not entire infrastructure.
The first embodiment of the present invention has been shown in Fig. 3-4.
Fig. 3 is the end face schematic diagram according to the pixel cell of first embodiment of the invention.Fig. 4 is according to the schematic cross-section of the pixel cell of first embodiment of the invention.As shown in Figure 3 and Figure 4, pixel cell 300 comprise pixel electrode 31, public electrode 32 and be arranged on pixel electrode 31 and public electrode 32 between insulation course 33(in Fig. 3, illustrate with dashed line form).
As shown in Figure 3 and Figure 4, according to the first embodiment of the present invention, described public electrode 32 is the plane-shape electrode being oppositely arranged with described pixel electrode 31.
As shown in Figure 3, according to the first embodiment of the present invention, described pixel electrode 31 comprises termination electrode 314 and the first strip shaped electric poles 311, the second strip shaped electric poles 312, the Article 3 shape electrode 313 that be arranged in parallel, wherein said the second strip shaped electric poles 312 is arranged between described the first strip shaped electric poles 311 and described Article 3 shape electrode 313, and described termination electrode 314 is shaped as circular arc and connect the end of described the first strip shaped electric poles 311 and described Article 3 shape electrode 313.
In the present embodiment, as shown in Figure 3 and Figure 4, described the second strip shaped electric poles 312 is connected with described termination electrode 314.
In the present embodiment, described pixel electrode 31 has voltage difference with described public electrode 32, thereby produces electric field between described pixel electrode 31 and described public electrode 32.
Preferably, described pixel electrode 31 and described public electrode 32 are transparency electrode, and described transparency electrode can adopt the manufactures of indium tin oxide (ITO), indium-zinc oxide (IZO) or other transparent conductive materials.
Be applicable to fringe field switching mode LCD according to the pixel cell 300 of the first embodiment of the present invention, it is arranged in the pixel region being surrounded by grid line and data line.
In the present embodiment, because described termination electrode 314 is shaped as circular arc, make the electric field component E forming in Y-direction due to termination electrode
ycancel out each other, control arranging of edge's liquid crystal molecule thereby stablized, suppressed the appearance of disclination phenomenon.
The second embodiment of the present invention has been shown in Fig. 5-6.
Fig. 5 is the end face schematic diagram according to the pixel cell of second embodiment of the invention.Fig. 6 is according to the schematic cross-section of the pixel cell of second embodiment of the invention.As shown in Figure 5 and Figure 6, pixel cell 500 comprise pixel electrode 51, public electrode 52 and be arranged on pixel electrode 51 and public electrode 52 between insulation course 53(in Fig. 5, illustrate with dashed line form).
As shown in Figure 5 and Figure 6, according to a second embodiment of the present invention, described public electrode 52 is the plane-shape electrode being oppositely arranged with described pixel electrode 51.
As shown in Figure 5, according to a second embodiment of the present invention, described pixel electrode 51 comprises termination electrode 514 and the first strip shaped electric poles 511, the second strip shaped electric poles 512, the Article 3 shape electrode 513 that be arranged in parallel, wherein said the second strip shaped electric poles 512 is arranged between described the first strip shaped electric poles 511 and described Article 3 shape electrode 513, and described termination electrode 514 is shaped as circular arc and connect the end of described the first strip shaped electric poles 511 and described Article 3 shape electrode 513.
In described the second embodiment, as shown in Figure 6, described the second strip shaped electric poles 512 is not connected with described termination electrode 514, but has opening 516.
In described the second embodiment, described pixel electrode 51 has voltage difference with described public electrode 52, thereby produces electric field between described pixel electrode 51 and described public electrode 52.
Preferably, described pixel electrode 51 and described public electrode 52 are transparency electrode, and transparency electrode can adopt the manufactures of indium tin oxide (ITO), indium-zinc oxide (IZO) or other transparent conductive materials.
In the present embodiment, because described termination electrode 514 is shaped as circular arc and described the second strip shaped electric poles 512 and described termination electrode 514 be not connected (having opening 516), make compared with the first embodiment of the present invention electric field component E forming in Y-direction due to termination electrode
ycancelled out each other better, controlled arranging of edge's liquid crystal molecule thereby stablized better, further suppressed the appearance of disclination phenomenon.
Fig. 7-Fig. 8 is the pixel cell structure for existing pixel cell structure and second embodiment of the invention, pixel electrode applied to 5v voltage, public electrode applied under the prerequisite of 0v voltage (to forming 5v voltage difference) simultaneously, emulation obtains the comparison diagram of pixel cell parameters.
Fig. 7 a is the luminosity distribution schematic diagram of the pixel cell of existing FFS liquid crystal indicator.Fig. 7 b is the luminosity distribution schematic diagram according to the pixel cell of second embodiment of the invention.In figure, the gray scale of color represents the light luminance of this position, known according to Fig. 7 a and Fig. 7 b contrast, for the some C that is positioned at pixel cell edge same position, the brightness that existing pixel cell is ordered at C is starkly lower than the brightness that the pixel cell of second embodiment of the invention is ordered at C.And known by contrasting, the pixel cell of the present embodiment is even at the luminosity of marginal position, illustrate that disclination does not appear in its liquid crystal molecule substantially.And existing pixel cell is also inhomogeneous in the brightness of marginal position, illustrate that liquid crystal molecule exists comparatively serious disclination phenomenon.
Fig. 8 a is the liquid crystal molecule distribution plan of pixel cell in the C point XZ of place plane that emulation obtains existing FFS liquid crystal indicator.Fig. 8 b is that the pixel cell of the second embodiment of the invention that obtains of emulation is at the liquid crystal molecule distribution plan of C point position XZ plane.Right cylinder in figure represents the directive liquid crystal molecule of tool.As shown in Fig. 8 a and Fig. 8 b, wherein, in Fig. 8 a, the liquid crystal molecule on right side is basically perpendicular to figure place planar alignment, do not rotate, and rotation has all occurred for liquid crystal molecule in Fig. 8 b, embodies good light transmission.
To sum up, the contrast that Electric Field Distribution according to the pixel cell of existing pixel cell and second embodiment of the invention shown in Fig. 7-8 under predetermined condition and liquid crystal molecule distribute, the second embodiment of the present invention is set to circular arc by the shape of described termination electrode and described the second strip shaped electric poles is set to not be connected with described termination electrode, thereby greatly reduce the electric field component in the not desired orientation of pixel cell edge, suppressed the appearance of disclination phenomenon.
Figure 9 illustrates the third embodiment of the present invention.
Fig. 9 is the end face schematic diagram of the array base palte of third embodiment of the invention.As shown in Figure 9, array base palte 900 comprises grid line 91 and the data line 92 of intersection, and grid line 91 and data line 92 limit pixel region 93.Array base palte 900 also comprises the switching device 94 that is arranged on grid line 91 and data line 92 crossover locations, is positioned at the pixel electrode 95 of pixel region 93, covers the public electrode 96 of described array base palte; And be arranged at the insulation course 97 between pixel electrode 95 and public electrode 96.
Wherein, described public electrode 96 is the plane-shape electrode being oppositely arranged with described pixel electrode 95;
Described pixel electrode 95 comprises termination electrode 954 and the first strip shaped electric poles 951, the second strip shaped electric poles 952, the Article 3 shape electrode 953 that be arranged in parallel, described the second strip shaped electric poles 952 is arranged between described the first strip shaped electric poles 951 and described Article 3 shape electrode 953, and described termination electrode 954 is shaped as circular arc and connect the end of described the first strip shaped electric poles 951 and described Article 3 shape electrode 953.
In the present embodiment, as shown in Figure 9, described the second strip shaped electric poles 952 is connected with described termination electrode 954.In other embodiments, described the second strip shaped electric poles 952 can also not be connected with described termination electrode 954.
In the present embodiment, described pixel electrode 95 has voltage difference with described public electrode 96, thereby produces electric field between described pixel electrode 95 and described public electrode 96.
Preferably, described pixel electrode 95 and described public electrode 96 are transparency electrode, and described transparency electrode can adopt the manufactures of indium tin oxide (ITO), indium-zinc oxide (IZO) or other transparent conductive materials.
In the present embodiment, because described termination electrode 954 is shaped as circular arc, make the electric field component E forming in Y-direction due to termination electrode
ycancel out each other, control arranging of edge's liquid crystal molecule thereby stablized, suppressed the appearance of disclination phenomenon.
Compared with prior art, pixel cell and array base palte that the present invention proposes are set to circular arc by the termination electrode of described pixel cell, make the electric field component E forming in Y-direction due to termination electrode
ycancel out each other, control arranging of edge's liquid crystal molecule thereby stablized, suppressed the appearance of disclination phenomenon.
Note, above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that and the invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious variations, readjust and substitute and can not depart from protection scope of the present invention.Therefore, although the present invention is described in further detail by above embodiment, the present invention is not limited only to above embodiment, in the situation that not departing from the present invention's design, can also comprise more other equivalent embodiment, and scope of the present invention is determined by appended claim scope.
Claims (10)
1. for a pixel cell for fringe field switching mode LCD, described pixel cell comprise pixel electrode, public electrode and be arranged on pixel electrode and public electrode between insulation course;
Described public electrode is the plane-shape electrode being oppositely arranged with described pixel electrode;
Described pixel electrode comprises termination electrode and the first strip shaped electric poles, the second strip shaped electric poles, the Article 3 shape electrode that be arranged in parallel, wherein said the second strip shaped electric poles is arranged between described the first strip shaped electric poles and described Article 3 shape electrode, and described termination electrode is shaped as circular arc and connect described the first strip shaped electric poles and the end of described Article 3 shape electrode.
2. the pixel cell for fringe field switching mode LCD according to claim 1, is characterized in that, described the second strip shaped electric poles is connected with described termination electrode.
3. the pixel cell for fringe field switching mode LCD according to claim 1, is characterized in that, described the second strip shaped electric poles is not connected with described termination electrode.
4. the pixel cell for fringe field switching mode LCD according to claim 1, is characterized in that, described pixel electrode and described public electrode are transparency electrode.
5. the pixel cell for fringe field switching mode LCD according to claim 1, is characterized in that, described pixel electrode and described public electrode have voltage difference, thereby produces electric field between described pixel electrode and described public electrode.
6. for an array base palte for fringe field switching mode LCD, comprising:
The grid line and the data line that intersect, described grid line and data line limit pixel region;
Be arranged on the switching device of grid line and data line crossover location;
Be positioned at the pixel electrode of pixel region;
Cover the public electrode of described array base palte; And
Be arranged at the insulation course between described pixel electrode and public electrode;
Wherein, described public electrode is the plane-shape electrode being oppositely arranged with described pixel electrode;
Described pixel electrode comprises termination electrode and the first strip shaped electric poles, the second strip shaped electric poles, the Article 3 shape electrode that be arranged in parallel, described the second strip shaped electric poles is arranged between described the first strip shaped electric poles and described Article 3 shape electrode, and described termination electrode is shaped as circular arc and connect described the first strip shaped electric poles and the end of described Article 3 shape electrode.
7. the array base palte for fringe field switching mode LCD according to claim 6, is characterized in that, described the second strip shaped electric poles is connected with described termination electrode.
8. the array base palte for fringe field switching mode LCD according to claim 6, is characterized in that, described the second strip shaped electric poles is not connected with described termination electrode.
9. the array base palte for fringe field switching mode LCD according to claim 6, is characterized in that, described pixel electrode and described public electrode are transparency electrode.
10. the array base palte for fringe field switching mode LCD according to claim 6, is characterized in that, described pixel electrode and described public electrode have voltage difference, thereby produces electric field between described pixel electrode and described public electrode.
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| CN201210520882.5A CN103852940B (en) | 2012-12-06 | 2012-12-06 | For fringe field switching mode LCD pixel cell and array base palte |
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| CN201210520882.5A CN103852940B (en) | 2012-12-06 | 2012-12-06 | For fringe field switching mode LCD pixel cell and array base palte |
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| CN103852940B CN103852940B (en) | 2016-05-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104298036A (en) * | 2014-10-09 | 2015-01-21 | 深圳市华星光电技术有限公司 | Display panel and thin film transistor array substrate |
| WO2022120783A1 (en) * | 2020-12-11 | 2022-06-16 | 京东方科技集团股份有限公司 | Pixel electrode, pixel structure, display panel and display apparatus |
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| CN1607441A (en) * | 2003-10-16 | 2005-04-20 | Lg.菲利浦Lcd株式会社 | Array substrate of in-plane switching type liquid crystal display and its manufacturing method |
| JP2005173539A (en) * | 2003-12-11 | 2005-06-30 | Lg Philips Lcd Co Ltd | In-plane switching liquid crystal display device and method of fabricating the same |
| CN1991463A (en) * | 2005-12-28 | 2007-07-04 | Lg.菲利浦Lcd株式会社 | Liquid crystal display device |
| US20120242942A1 (en) * | 2011-03-22 | 2012-09-27 | Jeon Mu-Kyung | Fringe field switching mode liquid crystal display apparatus and method of manufacturing the same |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1607441A (en) * | 2003-10-16 | 2005-04-20 | Lg.菲利浦Lcd株式会社 | Array substrate of in-plane switching type liquid crystal display and its manufacturing method |
| JP2005173539A (en) * | 2003-12-11 | 2005-06-30 | Lg Philips Lcd Co Ltd | In-plane switching liquid crystal display device and method of fabricating the same |
| CN1991463A (en) * | 2005-12-28 | 2007-07-04 | Lg.菲利浦Lcd株式会社 | Liquid crystal display device |
| US20120242942A1 (en) * | 2011-03-22 | 2012-09-27 | Jeon Mu-Kyung | Fringe field switching mode liquid crystal display apparatus and method of manufacturing the same |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104298036A (en) * | 2014-10-09 | 2015-01-21 | 深圳市华星光电技术有限公司 | Display panel and thin film transistor array substrate |
| WO2022120783A1 (en) * | 2020-12-11 | 2022-06-16 | 京东方科技集团股份有限公司 | Pixel electrode, pixel structure, display panel and display apparatus |
| CN115210641A (en) * | 2020-12-11 | 2022-10-18 | 京东方科技集团股份有限公司 | Pixel electrode, pixel structure, display panel and display device |
| CN115210641B (en) * | 2020-12-11 | 2023-11-28 | 京东方科技集团股份有限公司 | Pixel electrode, pixel structure, display panel and display device |
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