CN2715193Y - In-plane switching LCD device - Google Patents
In-plane switching LCD device Download PDFInfo
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- CN2715193Y CN2715193Y CN 200420070817 CN200420070817U CN2715193Y CN 2715193 Y CN2715193 Y CN 2715193Y CN 200420070817 CN200420070817 CN 200420070817 CN 200420070817 U CN200420070817 U CN 200420070817U CN 2715193 Y CN2715193 Y CN 2715193Y
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Abstract
The utility model provides an in-plane switching LCD device, comprising a first substrate, a second substrate, a liquid crystal layer, and a plurality of pixel electrodes and public electrodes. The liquid crystal layer is positioned between the first substrate and the second substrate. The in-plane switching LCD device is characterized in that the public electrodes and the pixel electrodes have similar shapes and are arranged in a cross mode. The pixel electrodes and the public electrodes are in a smooth shaped form. The in-plane switching LCD device has the advantages of higher contrast grade and better visual angle.
Description
[technical field]
The utility model relates to a kind of liquid crystal indicator, particularly a kind of plane inner switching type liquid crystal displaying apparatus.
[background technology]
Liquid crystal indicator is a kind of in the flat display apparatus, and it is through in decades development, not only occupies critical role and increase with its growth in the application of notebook, is also occupying increasing share as fields such as displays.And its flourish basic reason is the raising of the display effect brought of technical progress and the decline of price.
Because liquid crystal molecule in the vertical direction deflection meeting causes display viewing angles narrower in the prior art, many companies all research and develop relevant wide viewing angle technology, and IPS (In Plane Switching, in-plane changes) be exactly wherein have much advantage a kind of, its principle is that pixel electrode and public electrode produce a plane electric fields, liquid crystal molecule is rotated in the plane parallel with substrate to change the transmitance of light, because avoided the deflection of liquid crystal molecule in the vertical direction, can reach bigger observation visual angle.Its typical structure is be parallel to each other the also pixel electrode and the public electrode of staggered pectination.
See also Fig. 1, the United States Patent (USP) of announcing on October 1st, 2002 has disclosed an a kind of pixel region P of improved plane inner switching type liquid crystal displaying apparatus for the 6th, 459, No. 465.This pixel region comprises the parallel concentric line 135 of the vertical grid line 113 of data line 115 and data line 115 and data line 115, is arranged on TFT (Thin Film Transistor, thin film transistor (TFT)) 120, public electrode 133 and the pixel electrode 131 of data line 115 and grid line 113 intersections.The grid 121 of TFT 120, source electrode 123 and draining 125 is connected with grid line 113, data line 115 and pixel electrode 131 respectively, and public electrode 133 is connected with concentric line 135.This pixel electrode 131 and public electrode 133 are for being parallel to each other and being staggered, and for common comb electrode, it improves at what pixel electrode 131 is broken line shapes with public electrode 133, produce a pair of territory electric field.
See also Fig. 2, be the enlarged drawing in II district among Fig. 1.Because pixel electrode 131 and public electrode 133 are broken line shapes, it produces a pair of territory electric field, liquid crystal molecule 130 is along both direction deflection under this electric field action, make this pixel on display effect, be divided into two zones, under more inclined to one side observation visual angle, the aberration that two zones cause can compensate mutually, so electrode adopts the liquid crystal indicator of this kind structure that better wide viewing angle characteristic is arranged.
But in the bending place of broken line, because electric field is unusual, the normally deflection of the liquid crystal molecule at this place makes light normally not pass through, so its contrast reduces.
And because electric field only is two territories, so this liquid crystal indicator is difficult to all have good display characteristic on each direction, promptly its viewing angle characteristic is general.
[utility model content]
Prior art in-plane switching LCD device contrast is lower, viewing angle characteristic is general in order to overcome, and the utility model provides the in-plane that a kind of contrast is higher, viewing angle characteristic is more excellent switching LCD device.
The technical scheme that the utility model technical solution problem is adopted is: a kind of in-plane switching LCD device is provided, it comprises one first substrate, one second substrate, a liquid crystal layer, a plurality of pixel electrodes and public electrode, this liquid crystal layer is between first substrate and second substrate, this public electrode and pixel electrode have similar shape, and be staggered, this pixel electrode and this public electrode are smooth curve shapes.
Compare with prior art, the advantage of the utility model in-plane switching LCD device is that its pixel electrode and this public electrode are smooth curve shapes, and the unusual phenomenon of intersection liquid crystal deflection improves contrast thereby it has eliminated the two territories of prior art; The electric field of its generation is the continually varying multiple domain, so its viewing angle characteristic in all directions is more excellent.
[description of drawings]
Fig. 1 is the floor map of prior art in-plane switching LCD device one pixel region.
Fig. 2 is the enlarged drawing in II district among Fig. 1.
Fig. 3 is the floor map of the utility model in-plane switching LCD device first embodiment one pixel region.
Fig. 4 is the sectional view of Fig. 3 along the VI-VI direction.
Fig. 5 is that electrode is arranged and the liquid crystal deflecting element synoptic diagram in the pixel region of the utility model in-plane switching LCD device first embodiment.
Fig. 6 is the electrode synoptic diagram of arranging in the pixel region of the utility model in-plane switching LCD device second embodiment.
[embodiment]
See also Fig. 3 and Fig. 4, be the floor map and the sectional view of the utility model in-plane switching LCD device first embodiment one pixel region, with definition shown in Figure 4 direction up and down, the utility model in-plane switching LCD device comprises first substrate 201 and second substrate 202, liquid crystal layer 203, grid line 211 and data line 212, TFT 220, concentric line 213, pixel bonding pad 231, pixel connecting line 232, pixel electrode 233 and public electrode 243 and gate insulation layer 262 and passivation layer 261.Wherein, second substrate 202 is parallel with first substrate 201 and be positioned at its top; Liquid crystal layer 203 is between first substrate 201 and second substrate 202; Grid line 211 and data line 212 are arranged in first substrate 201, and it is vertical mutually, constitute a plurality of pixel regions (not indicating); TFT 220 is arranged on the infall of grid line 211 and data line 212, and it comprises grid 221, source electrode 222 and drains 223; Concentric line 213 is connected with public electrode 243 in first substrate 201; Pixel connecting line 232 is connected with drain electrode 223 by pixel bonding pad 231, also is connected with pixel electrode 233 simultaneously.Public electrode 243 has similar shape with pixel electrode 233, and it is parallel to each other and is staggered, and this pixel electrode 233 and public electrode 243 are waveforms.
Grid line 211 is connected with TFT 220 grids 221 to transmit sweep signal, and this sweep signal is used for controlling the switch of TFT 220; Data line 212 is connected with data signal with TFT 220 source electrodes 222; TFT 220 drain electrodes 223 are connected with pixel electrode 233 by pixel bonding pad 231 and pixel connecting line 232, therefore pixel electrode 233 is connected with TFT 220 drain electrodes 223 formation electricity, when sweep signal makes TFT 220 when opening, drain electrode 223 is sent corresponding signal of video signal according to the data-signal of source electrode 222 receptions, be connected because pixel electrode 233 constitutes electricity with TFT 220 drain electrodes 223, this signal of video signal is sent to pixel electrode 233; After pixel electrode 233 receives signal of video signal, potential difference (PD) between itself and the public electrode 243 makes and forms the approximate electric field that is parallel to first substrate 201 and second substrate 202 between two electrodes, this electric field make the liquid crystal deflecting element in the liquid crystal layer 203 and the transmitance that changes light with display image.Because pixel electrode 233 is waveforms with public electrode 243, so the direction of an electric field that forms between the two changes an i.e. continuous multiple domain electric field, so this structure can be referred to as the continuous domain structure continuously.
Seeing also Fig. 5, is that electrode is arranged and the liquid crystal deflecting element synoptic diagram in the utility model in-plane switching LCD device first embodiment one pixel region.Corrugated pixel electrode 233 is parallel to each other and is staggered with public electrode 243, when having voltage to be applied on two electrodes, liquid crystal molecule in the liquid crystal layer 203 (not indicating) is along direction of an electric field deflection, because two electrodes are waveform, the electric field of its formation changes continuously, because it is unusual to have eliminated the electric field of of the prior art pair of territory intersection liquid crystal deflecting element unusual and that cause, therefore the lower situation of contrast of the prior art is avoided, thereby can reach higher contrast ratio; In addition, because this electric field is a multiple domain, this pixel region all has good display on each direction, and promptly its viewing angle characteristic is more excellent.And the viewing area of entire liquid crystal display device is made of all pixel regions, so the utility model in-plane switching LCD device also has higher contrast and more excellent viewing angle characteristic.
In the present embodiment, pixel electrode 233 satisfies following equation with the shape of public electrode 243:
x＝A?sin(π·y/2L)
Wherein, x, y are respectively horizontal direction and vertical direction variable, and A is the level interval of adjacent pixel electrodes and public electrode, and L is the length of this pixel region, and 0≤Y≤L.
And with following equation:
X=A sin (π y/NL), (and N＞2)
The pixel electrode of the wave-like of expressing and public electrode obviously also have the advantage described in first embodiment.
See also Fig. 6, the utility model in-plane switching LCD device second embodiment adopts the pixel electrode 273 and the public electrode 283 of arc, this structure also forms the continuous domain electric field, therefore also can b referred to as the continuous domain structure, its advantage can be described below: pixel electrode 273 and public electrode 283 are parallel to each other and are staggered, because two electrodes are waveform, the electric field of its formation changes continuously, therefore the electric field liquid crystal deflecting element unusual and that cause of having eliminated of the prior art pair of territory intersection is unusual, thereby the situation of having avoided contrast of the prior art to reduce, and reach higher contrast ratio; In addition, because this electric field is a multiple domain, so good display is all arranged on each direction, promptly its viewing angle characteristic is more excellent.
In the present embodiment, pixel electrode 233 satisfies following equation with the shape of public electrode 243:
x＝A?sin(π·y/L)
Wherein, x, y are respectively the variablees of horizontal direction and vertical direction, and A is the level interval of adjacent pixel electrodes and public electrode, and L is the length of this pixel region, and 0≤Y≤L.
The shape of the utility model in-plane switching LCD device public electrode and pixel electrode is not limited to waveform or arc, other electrode shape that can form the continuous domain electric field parallel with substrate also can adopt, and also is suitable for as smooth connection straight line and the curve shape that constitutes of sweep together.
Concentric line, public electrode and the pixel electrode of the utility model in-plane switching LCD device can adopt transparent conductive material such as ITO (Indium Tin Oxide, tin indium oxide) etc.When adopting transparent material, can obtain high aperture opening ratio, thereby have higher brightness.
The public electrode and the pixel electrode of the utility model in-plane switching LCD device can be arranged on the different base, and generation and the approximately parallel electric field of substrate, and promptly the fundamental component of this electric field is on the direction parallel with substrate; When being arranged on same substrate, can be present in therebetween just like separation layers such as passivation layers, make two electrodes be positioned at different layers; Or public electrode and pixel electrode be arranged on one deck producing the more excellent electric field of collimation, pixel electrode and TFT drain electrode this moment be connected can by as bonding pad of the present utility model or alternate manner realize.
Claims (12)
1. plane inner switching type liquid crystal displaying apparatus, it comprises one first substrate, one second substrate, one liquid crystal layer, a plurality of pixel electrode and public electrode, this liquid crystal layer is between first substrate and second substrate, it is characterized in that: this public electrode and pixel electrode have similar shape, and be staggered, this pixel electrode and this public electrode are smooth curve shapes.
2. plane inner switching type liquid crystal displaying apparatus as claimed in claim 1 is characterized in that: this pixel electrode and this public electrode are waveforms.
3. plane inner switching type liquid crystal displaying apparatus as claimed in claim 2, it is characterized in that: this pixel electrode and this public electrode shape satisfy as minor function: x=A sin (π y/ (nL)), wherein, x, y are respectively horizontal direction and vertical direction variable, A is the level interval of adjacent pixel electrodes and public electrode, L is the length of this pixel region, and n is greater than or equal to 2 integer, and 0≤Y≤L.
4. plane inner switching type liquid crystal displaying apparatus as claimed in claim 1 is characterized in that: this pixel electrode and this public electrode are arcs.
5. plane inner switching type liquid crystal displaying apparatus as claimed in claim 4, it is characterized in that: this pixel electrode and this public electrode shape satisfy as minor function: x=A sin (π y/L), wherein, x, y are respectively horizontal direction and vertical direction variable, A is the level interval of adjacent pixel electrodes and public electrode, L is the length of this pixel region, and 0≤Y≤L.
6. plane inner switching type liquid crystal displaying apparatus as claimed in claim 1 is characterized in that: this pixel electrode is the smooth, curvilinear shape that straight line is connected with curve smoothing with this public electrode.
7. plane inner switching type liquid crystal displaying apparatus as claimed in claim 1 is characterized in that: this concentric line is parallel with grid line.
8. plane inner switching type liquid crystal displaying apparatus as claimed in claim 1 is characterized in that: this public electrode and pixel electrode are transparent conductive materials.
9. plane inner switching type liquid crystal displaying apparatus as claimed in claim 1 is characterized in that: this public electrode and pixel electrode are positioned at different base.
10. plane inner switching type liquid crystal displaying apparatus as claimed in claim 1 is characterized in that: this public electrode and pixel electrode are positioned at same substrate.
11. plane inner switching type liquid crystal displaying apparatus as claimed in claim 10 is characterized in that: between this public electrode and the pixel electrode separation layer is arranged.
12. plane inner switching type liquid crystal displaying apparatus as claimed in claim 10 is characterized in that: this public electrode and pixel electrode are positioned at same one deck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420070817 CN2715193Y (en) | 2004-06-19 | 2004-06-19 | In-plane switching LCD device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420070817 CN2715193Y (en) | 2004-06-19 | 2004-06-19 | In-plane switching LCD device |
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| Publication Number | Publication Date |
|---|---|
| CN2715193Y true CN2715193Y (en) | 2005-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200420070817 Expired - Lifetime CN2715193Y (en) | 2004-06-19 | 2004-06-19 | In-plane switching LCD device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100376990C (en) * | 2003-10-14 | 2008-03-26 | 鸿富锦精密工业（深圳）有限公司 | Flat inside switching type liquid crystal display device |
| CN100454114C (en) * | 2005-08-23 | 2009-01-21 | 群康科技(深圳)有限公司 | Lateral field switching mode LCD within flat panel |
| US8841671B2 (en) | 2006-05-16 | 2014-09-23 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device and semiconductor device |
| US9213206B2 (en) | 2006-04-06 | 2015-12-15 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device, semiconductor device, and electronic appliance |
| CN110824791A (en) * | 2019-11-19 | 2020-02-21 | 京东方科技集团股份有限公司 | Electrode structure, array substrate and display device |
-
2004
- 2004-06-19 CN CN 200420070817 patent/CN2715193Y/en not_active Expired - Lifetime
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100376990C (en) * | 2003-10-14 | 2008-03-26 | 鸿富锦精密工业（深圳）有限公司 | Flat inside switching type liquid crystal display device |
| CN100454114C (en) * | 2005-08-23 | 2009-01-21 | 群康科技(深圳)有限公司 | Lateral field switching mode LCD within flat panel |
| US10684517B2 (en) | 2006-04-06 | 2020-06-16 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device, semiconductor device, and electronic appliance |
| US11921382B2 (en) | 2006-04-06 | 2024-03-05 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device, semiconductor device, and electronic appliance |
| US11644720B2 (en) | 2006-04-06 | 2023-05-09 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device, semiconductor device, and electronic appliance |
| US9213206B2 (en) | 2006-04-06 | 2015-12-15 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device, semiconductor device, and electronic appliance |
| US9958736B2 (en) | 2006-04-06 | 2018-05-01 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device, semiconductor device, and electronic appliance |
| US11442317B2 (en) | 2006-04-06 | 2022-09-13 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device, semiconductor device, and electronic appliance |
| US11073729B2 (en) | 2006-04-06 | 2021-07-27 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device, semiconductor device, and electronic appliance |
| US9709861B2 (en) | 2006-05-16 | 2017-07-18 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device and semiconductor device |
| US11061285B2 (en) | 2006-05-16 | 2021-07-13 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device comprising a dogleg-like shaped pixel electrode in a plane view having a plurality of dogleg-like shaped openings and semiconductor device |
| US10509271B2 (en) | 2006-05-16 | 2019-12-17 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device comprising a semiconductor film having a channel formation region overlapping with a conductive film in a floating state |
| US11106096B2 (en) | 2006-05-16 | 2021-08-31 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device and semiconductor device |
| US11435626B2 (en) | 2006-05-16 | 2022-09-06 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device and semiconductor device |
| US10001678B2 (en) | 2006-05-16 | 2018-06-19 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device and semiconductor device |
| US8872182B2 (en) | 2006-05-16 | 2014-10-28 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device and semiconductor device |
| US11726371B2 (en) | 2006-05-16 | 2023-08-15 | Semiconductor Energy Laboratory Co., Ltd. | FFS-mode liquid crystal display device comprising a top-gate transistor and an auxiliary wiring connected to a common electrode in a pixel portion |
| US8841671B2 (en) | 2006-05-16 | 2014-09-23 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device and semiconductor device |
| CN110824791A (en) * | 2019-11-19 | 2020-02-21 | 京东方科技集团股份有限公司 | Electrode structure, array substrate and display device |
| CN110824791B (en) * | 2019-11-19 | 2022-07-29 | 京东方科技集团股份有限公司 | Array substrate and display device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140619 Granted publication date: 20050803 |