CN101339337B

CN101339337B - Multi-domain vertical tropism mode LCD device

Info

Publication number: CN101339337B
Application number: CN2008100415413A
Authority: CN
Inventors: 黄秋平
Original assignee: SVA Group Co Ltd
Current assignee: INESA DISPLAY MATERIALS CO., LTD.
Priority date: 2008-08-11
Filing date: 2008-08-11
Publication date: 2010-06-02
Anticipated expiration: 2028-08-11
Also published as: CN101339337A

Abstract

The invention related to a liquid crystal display device of a multidomain vertical orientation mode, including a color film substrate with a common electrode formed thereon; an array substrate comprising a plurality of subpixel areas and a pixel electrode arranged in each subpixel area; a liquid crystal layer filled between the color film substrate and the array substrate; wherein a domain modulator is formed on the common electrode or the pixel electrode, liquid crystal in each subpixel is divided into a plurality of domain groups by the domain modulator which is provided with an extension part, and the extension part is overlapped with at least one of the domain groups, the domain groups are provided with basically the same areas after being overlapped. The liquid crystal display deviceof the multidomain vertical orientation mode makes the plurality of domain groups provided with basically the same areas, thereby providing homogeneously vertical and horizontal visibility without influencing the brightness difference and the products manufacture yield through the domain modulation or the extension part of a shielding layer, or by partially etching the pixel electrodes.

Description

The liquid crystal display device of multi-domain vertical orientation mode

Technical field

The present invention relates to a kind of liquid crystal display device, particularly relate to a kind of multi-domain vertical orientation mode (Multi-domain Vertical Alignment, liquid crystal display device MVA/PVA).

Background technology

LCD is to use flat-panel monitor widely.LCD comprises two glass substrates and liquid crystal layer, and wherein, two substrates are provided with electrode (pixel electrode and common electrode), and liquid crystal layer is between two substrates.LCD is by being applied to voltage at electrode to produce electric field in liquid crystal layer, and the liquid crystal molecule in the liquid crystal layer is orientated under effect of electric field to regulate polarization of incident light.

Because multi-domain vertical orientation mode (Multi-domain Vertical Alignment, MVA/PVA) LCD has reaction velocity, wide visible angle, high transmittance, high contrast and perfect image quality faster, is used widely gradually in recent years.

Fig. 1 is the sub-pixel planar structure synoptic diagram of existing multi-domain vertical orientation mode display panels.Scan signal line 10 drive thin film transistors 13 write pixel electrode 14 with the voltage signal on the data signal line 12.Memory capacitance concentric line 28 forms storage capacitors with pixel electrode 14, keeps the voltage on the pixel electrode 14 stable, thereby drives liquid crystal deflecting element.Farmland modulating device 15 and farmland modulating device 16 on two substrates are divided into a plurality of farmlands with liquid crystal, make liquid crystal molecules tilt in different directions, thereby make reference viewing angle broaden.Wherein, the farmland modulating device can be projection or slit.Yet because the relation of dot structure, the farmland has different areas probably, is difficult to provide vertical uniformly and level visuality.Specifically, w1, w3, w5, w7 belongs to same farmland group, w2, w4, w6, w8 belongs to another farmland group, w1 wherein, and the w8 area equates, w2, the w7 area equates, w3, and the w6 area is equal, but because the relation of dot structure, w4, the w5 area does not wait, and the w5 area is slightly larger than w4, like this, two corresponding farmland group's areas do not wait, and cause the reduction of visual performance.

In order to realize that the farmland area equates, patent CN200610092258.4 has proposed between the change farmland width and has blocked unnecessary farmland area solution by the storage line flank.See also Fig. 2 A, to pixel electrode 82b, common electrode slit 92 is divided into four farmlands, equates for making A, B, four farmland areas of C, D, changes the ratio of Wa/Wb and Wc/Wd.Please continue the B referring to Fig. 2, the constant rate of Wa/Wb and Wc/Wd stretches out flank on memory capacitance concentric line 28, and memory capacitance concentric line flank 29 covers the farmland excess area, thereby keeps the effective brightness area in farmland to equate.

Though such scheme can be realized the farmland area and equate, but still have some problems.Fig. 2 A scheme has changed the width between the farmland, will cause the inconsistent of liquid crystal molecules tilt angle and response speed in the farmland of different in width, thereby produce luminance difference.Though Fig. 2 B does not have this problem, strengthened the overlapping area between storage line and pixel electrode and the data line, thereby increased the possibility that is short-circuited.

Summary of the invention

Technical matters to be solved by this invention provides a kind of liquid crystal display device of multi-domain vertical orientation mode, can effectively keep the effective brightness area in farmland to equate, vertical uniformly and level visuality are provided, and does not influence luminance difference and manufacturing yield of products again.

For addressing the above problem, the invention provides a kind of liquid crystal display device of multi-domain vertical orientation mode, comprising: a color membrane substrates, its surface is formed with light shield layer and common electrode; Array basal plate comprises a plurality of subpixel area, is provided with pixel electrode in each sub-pixel; Liquid crystal layer is filled between described color membrane substrates and the array base palte; Wherein, be formed with the farmland modulating device on described common electrode or the pixel electrode, liquid crystal is divided into a plurality of farmland groups by described farmland modulating device in each sub-pixel, described light shield layer is provided with the extension, described extension at least with described a plurality of farmland groups in one stacked, described a plurality of farmland groups have essentially identical effective brightness area after stacked.

In the liquid crystal display device of above-mentioned multi-domain vertical orientation mode, described farmland modulating device is projection or slit.

The present invention contrasts prior art following beneficial effect: the present invention is by the extension of light shield layer, make a plurality of farmland groups have essentially identical effective brightness area, vertical uniformly and level visuality are provided, do not influence luminance difference and manufacturing yield of products again.

Description of drawings

Fig. 1 is the sub-pixel planar structure synoptic diagram of existing multi-domain vertical orientation mode display panels.

Fig. 2 A is existing by changing width adjustment farmland area synoptic diagram between the farmland.

Fig. 2 B existingly blocks unnecessary farmland area synoptic diagram by the storage line flank.

Fig. 3 A, 3B block unnecessary farmland area synoptic diagram by the extension of farmland modulating device among the present invention.

Fig. 4 A, 4B block unnecessary farmland area synoptic diagram by the extension of light shield layer among the present invention.

Fig. 5 A, 5B are that the present invention passes through etched portions pixel electrode adjustment farmland area synoptic diagram.

Among the figure:

10: scan signal line 12: data signal line

13: thin film transistor (TFT) 14: pixel electrode

15: slit 16: projection

17: the extension 19 of farmland modulating device: light shield layer

20: light shield layer extension 22: the pixel electrode part that is etched

28: memory capacitance concentric line 29: memory capacitance concentric line flank

82b: pixel electrode 92: common electrode slit

Embodiment

The invention will be further described below in conjunction with accompanying drawing and exemplary embodiments.

The liquid crystal display device of multi-domain vertical orientation mode provided by the invention comprises: a color membrane substrates, and its surface is formed with common electrode; Array basal plate comprises a plurality of subpixel area, and each sub-pixel is positioned at the position that scan signal line 10 and data signal line 12 intersects, and is provided with pixel electrode 14 in it; Liquid crystal layer is filled between described color membrane substrates and the array base palte; Wherein, be formed with the farmland modulating device on described common electrode or the pixel electrode, the farmland modulating device is slit 15 or projection 16, and described farmland modulating device is divided into a plurality of farmland groups with liquid crystal in each sub-pixel.Please refer to Fig. 1, farmland w1, w3, w5, w7 belong to same farmland group, farmland w2, w4, w6, w8 belong to another farmland group, w1 wherein, and the w8 area equates, w2, the w7 area equates, w3, the w6 area is equal, but since the relation of dot structure, farmland w4, farmland w5 area does not wait, and farmland w5 area is slightly larger than farmland w4.

Please refer to Fig. 3 A, 3B, slit 15 or projection 16 that the sub-pixel of the liquid crystal display device in the present embodiment is set at respectively on common electrode or the pixel electrode are divided into a plurality of farmland groups, for making effective brightness area on each farmland equate, the farmland modulating device is taked to stretch out flank or widened the extension, to block the unnecessary area in farmland.The extension 17 of farmland modulating device is positioned at place, sub-pixel edge, be the flank shape and block farmland w5, the size of the extension 17 of farmland modulating device is by w4, the w5 area difference is determined, area with w5 after blocking and w4 is as the criterion about equally, thereby make effective brightness area unanimity on each farmland, obtained vertical uniformly and level visuality.

Fig. 4 B, 4B block unnecessary farmland area synoptic diagram by the extension of light shield layer among the present invention.

Please refer to Fig. 4 A, 4B, for making effective brightness area on each farmland equate that light shield layer 19 stretches out certain area, the light shield layer extension 20 that is positioned at place, sub-pixel edge is the flank shape and blocks farmland w5, and w5 after blocking and the area of w4 are about equally.

Fig. 5 A, 5B adjust farmland area synoptic diagram by the etched portions pixel electrode among the present invention.

Please refer to Fig. 5 A, 5B, for making effective brightness area on each farmland equate, the pixel electrode part of the area that the farmland is unnecessary etches away, the pixel electrode part 22 that is etched is positioned at the edge of farmland w5, pixel electrode after being etched forms one or two recess, and w5 after feasible being etched and the area of w4 are about equally.

The extension of farmland modulating device and light shield layer also can be other positions or shape, implements and adjust the farmland area to be as the criterion with convenient.Also can be other positions or shape in like manner to the etched portions pixel electrode.Extension in the foregoing description and pixel electrode recess are positioned at place, sub-pixel edge, except blocking the farmland excess area, can also reduce and cover black line.

Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.

Claims

1. the liquid crystal display device of a multi-domain vertical orientation mode comprises:

One color membrane substrates, its surface is formed with light shield layer and common electrode;

Array basal plate comprises a plurality of subpixel area, is provided with pixel electrode in each sub-pixel;

Liquid crystal layer is filled between described color membrane substrates and the array base palte;

Wherein, be formed with the farmland modulating device on described common electrode or the pixel electrode, liquid crystal is divided into a plurality of farmland groups by described farmland modulating device in each sub-pixel, it is characterized in that, described light shield layer is provided with the extension, described extension at least with described a plurality of farmland groups in one stacked, described a plurality of farmland groups have essentially identical effective brightness area after stacked.

2. the liquid crystal display device of multi-domain vertical orientation mode according to claim 1 is characterized in that, described farmland modulating device is projection or slit.