CN100523926C - Pixel structure and liquid crystal display panel using same - Google Patents
Pixel structure and liquid crystal display panel using same Download PDFInfo
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- CN100523926C CN100523926C CNB2006101425269A CN200610142526A CN100523926C CN 100523926 C CN100523926 C CN 100523926C CN B2006101425269 A CNB2006101425269 A CN B2006101425269A CN 200610142526 A CN200610142526 A CN 200610142526A CN 100523926 C CN100523926 C CN 100523926C
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Abstract
A pixel structure comprises a substrate, a scan line, a data line, a common line, an active device, a pixel electrode, a passivation layer and a transition auxiliary electrode. The scanning wiring and the data wiring are arranged on the substrate in a crossed manner so as to define a pixel area on the substrate; the common wiring is arranged on the substrate and is substantially parallel to the scanning wiring; the active element is arranged in the pixel region and is electrically connected with the scanning wiring and the data wiring; the pixel electrode is arranged in the pixel region and is electrically connected with the active element; the protective layer is arranged between the pixel electrode and the data wiring; the state-changing auxiliary electrode is arranged around the pixel electrode, and the pixel electrode and the state-changing auxiliary electrode are the same film layer; in addition, the transition auxiliary electrode is electrically connected with the common wiring through a contact window of the protection layer.
Description
Technical field
The invention relates to a kind of dot structure and display panel, and particularly relevant for a kind of dot structure and display panels that is applicable to optical compensation birefringence LCD (optically compensated birefringence liquid crystaldisplay, OCB LCD).
Background technology
Because the demand of display increased progressively with day, so industry drops into the development of related display with all strength.Wherein, (cathode ray tube CRT) because of having excellent display quality and technology maturation, therefore monopolizes the monitor market all the year round with cathode-ray tube (CRT) again.Yet, recently because the rise of environmental protection notion, the big and bigger characteristic of generation radiant quantity of energy resource consumption based on cathode-ray tube (CRT), cathode-ray tube (CRT) adds that its product flattening space is limited, so can't satisfy the market trend of market for light, thin, short, little, U.S. and low consumpting power.Therefore, have that high image quality, space utilization efficient are good, (thin film transistor liquid crystal display TFT-LCD) becomes the main flow in market to the Thin Film Transistor-LCD of low consumpting power, advantageous characteristic such as radiationless gradually.
LCD is according to employed liquid crystal kind, the type of drive different numerous species that are distinguished into light source allocation position etc.Wherein, optical compensation birefringence LCD (optically compensatedbirefringence liquid crystal display, OCB LCD) has (response) speed of replying that is exceedingly fast, can provide computer when fast-changing continuous pictures such as playing animation or film, smooth more picture shows, and is very suitable for the application of high-order LCD.But optical compensation birefringence LCD just can enter normal display state after must allowing liquid crystal molecule transfer bending status (bend state) to via extension attitude (splay state) change earlier, and the work performance of rapid answer is provided.
Figure 1A illustrates the synoptic diagram that liquid crystal molecule in the display panels is in the extension attitude.Figure 1B illustrates liquid crystal molecule in the display panels and is in synoptic diagram for bending status.Please be simultaneously with reference to Figure 1A and Figure 1B, in optical compensation birefringence type liquid crystal display panel 10, liquid crystal layer 11 is to be disposed between upper substrate 12 and the infrabasal plate 13.Wherein, upper substrate 12 has the identical alignment film (alignment layer) (not illustrating) of alignment direction (rubbing di rection) respectively with infrabasal plate 13.Liquid crystal molecule in liquid crystal layer 11 is not subjected to extra electric field and does the time spent, is to arrange in extension attitude mode.And when optical compensation birefringence LCD was desired to enter holding state, the electric field that must apply vertical upper substrate 12 transferred bending status to so that liquid crystal molecule becomes on liquid crystal molecule.In the known optical compensation birefringence LCD, the full panel pixel needs several minutes time to carry out this transfer process if want driven, promptly before entering holding state, needs the long transition time.But, this for LCD the characteristic with opening i.e. usefulness that should possess very unfavorable.Therefore, allow optical compensation birefringence LCD is easier to be accepted by the consumer, conversion (fast transition) is necessary fast.
For the liquid crystal molecule in the optical compensation birefringence type liquid crystal display panel is transformed into bending status from the extension attitude quickly, the mode that a kind of known technology utilization increases voltage produces stronger electric field, makes liquid crystal molecule be converted to bending status fast from the extension attitude.Yet, can bear high-tension suitable driving wafer difficulty search out, make relevant research and development and volume production be difficult for carrying out, so need collocation can produce the technology of transition starting point, reduce transition voltage and transition time, guarantee that simultaneously the transition of full panel is complete in the display panels.Another kind of common methods in the known techniques is to add polymkeric substance (polymer) in liquid crystal layer, when liquid crystal molecule is in bending status, with UV-irradiation on polymkeric substance so that it forms polymeric wall, so then can keep Liquid Crystal Molecules Alignment to become bending status.Though this kind mode is simple, can cause the light leakage phenomena of optical compensation birefringence type liquid crystal display panel.
In the LCD that United States Patent (USP) is disclosed for No. 6661491, No. 6600540 and No. 6603525, be in pixel electrode, to dig a hole, utilize the storage capacitors of pixel electrode and upper and lower and potential difference (PD) and the transverse electric field between the comparative electrode (counter electrode), to help the transition of liquid crystal molecule.Though in above-mentioned three pieces of LCD that patent disclosed, can produce the transition starting point, yet the mode of dig a hole (slit) will have shortcomings such as sacrificing aperture opening ratio and reduction panel luminance in the pixel electrode of LCD by transverse electric field.
In addition, in the optical compensation birefringence LCD that United States Patent (USP) is disclosed for No. 6597424, be around pixel electrode, to design several protuberances or depressed part, different potential difference (PD) between pixel electrode and grid, pixel electrode and the data wiring is gone up in collocation again, can help the transition starting point of liquid crystal molecule transition with generation, and then quicken liquid crystal molecule by the polling of extension attitude to bending status.
Summary of the invention
The purpose of this invention is to provide a kind of dot structure, this dot structure is to form a transition auxiliary electrode that is adjacent to pixel electrode when forming pixel electrode simultaneously, has a potential difference (PD) between this transition auxiliary electrode and the pixel electrode.By the transverse electric field that is produced between pixel electrode and the transition auxiliary electrode, helping the transition of liquid crystal molecule, and can avoid known technology in pixel electrode, to dig a hole and the problem that causes the storage capacitors value to reduce.
Another object of the present invention provides a kind of display panels, and this display panels has response time faster.
For reaching above-mentioned or other purposes, the present invention proposes a kind of dot structure, and it comprises a substrate, one scan distribution, a data wiring, a common distribution, an active member, a pixel electrode, a protective seam and a transition auxiliary electrode.Scan wiring and data wiring are arranged in a crossed manner on substrate, and define a pixel region.Shared distribution is to be disposed on the substrate, and shared distribution is parallel to above-mentioned scan wiring in fact.Active member is to be disposed in the pixel region, and electrically connects with scan wiring and data wiring.Pixel electrode is to be disposed in the pixel region, and electrically connects with active member.Protective seam is to be disposed between pixel electrode and the data wiring.The transition auxiliary electrode is disposed at around the pixel electrode, and pixel electrode and transition auxiliary electrode be same rete, in addition, the transition auxiliary electrode be the contact hole that sees through this protective seam with should shared distribution electric connection.
In one embodiment of this invention, above-mentioned active member is a thin film transistor (TFT).
In one embodiment of this invention, shared distribution is adjacent to next bar scan wiring of above-mentioned scan wiring.
In one embodiment of this invention, the transition auxiliary electrode is between shared distribution and next bar scan wiring.
In one embodiment of this invention, the transition auxiliary electrode is positioned at the top of next bar scan wiring.
In one embodiment of this invention, the transition auxiliary electrode is adjacent to data wiring.
In one embodiment of this invention, the transition auxiliary electrode is positioned at the top of data wiring.
In one embodiment of this invention, to be adjacent to the shape of the side of transition auxiliary electrode be the shape that corresponds to the transition auxiliary electrode to pixel electrode.
In one embodiment of this invention, the shape indentation of transition auxiliary electrode.
In addition, dot structure of the present invention also can be applicable to the active component array base board in the display panels, and its structure is roughly same as described above, so no longer repeat at this.
In the dot structure of active component array base board of the present invention, can produce a transverse electric field between transition auxiliary electrode and the pixel electrode.The existence of this transverse electric field can make the arrangement mode of the liquid crystal molecule of subregion change earlier.When panel applied transition voltage, each pixel all had the transition starting point to produce, and shortens the transition time of display panels so liquid crystal molecule just can be converted to bending status fast.
In addition, because the transition auxiliary electrode can be arranged at the scan wiring or the top of data wiring, therefore, the storage capacitors of loss has only the part of contact hole, so, can make display panels have high aperture opening ratio.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Figure 1A illustrates the synoptic diagram that liquid crystal molecule in the display panels is in the extension attitude.
Figure 1B illustrates liquid crystal molecule in the display panels and is in synoptic diagram for bending status.
Fig. 2 A and 2B illustrate and are the part section structural representation according to the display panels of one embodiment of the invention.
Fig. 2 C illustrates the vertical view of active component array base board in the display panels of Fig. 2 A and 2B.
Fig. 3 A, 3B and 3C illustrate the vertical view that is respectively according to active component array base board in the display panels of other embodiments of the invention.
Embodiment
Fig. 2 A and 2B illustrate and are the part section structural representation according to the display panels of one embodiment of the invention; Fig. 2 C illustrates the vertical view of active component array base board in the display panels of Fig. 2 A and 2B, and wherein Fig. 2 A is the diagrammatic cross-section of being drawn along I-I ' profile line among Fig. 2 C, the diagrammatic cross-section of Fig. 2 B for being drawn along ∏-∏ ' profile line among Fig. 2 C.Please be simultaneously with reference to Fig. 2 A, 2B and 2C, display panels 100 is an optical compensation birefringence type liquid crystal display panel, it comprises an active component array base board 110, a colored optical filtering substrates 120 and a liquid crystal layer 130.Colored optical filtering substrates 120 is the tops that are disposed at active component array base board 110, and liquid crystal layer 130 is to be folded between colored optical filtering substrates 120 and the active component array base board 110.
Active component array base board 110 comprises first substrate 112 and is disposed at a plurality of dot structures 114 on first substrate 112 that each dot structure 114 comprises one scan distribution 1141a, a data wiring 1142a, an active member 1143, a pixel electrode 1144 and a transition auxiliary electrode 1145.First substrate 112 for example is the substrate of a glass substrate, quartz base plate or other suitable materials.Scan wiring 1141a and data wiring 1142a are disposed on first substrate 112, to define a pixel region P on first substrate 112.In addition, scan wiring 1141a and data wiring 1142a for example are aluminium alloy conductor or the formed lead of other suitable conductive materials.Active member 1143 is to be disposed on first substrate 112, and each active member 1143 is to electrically connect with corresponding scan wiring 1141a and data wiring 1142a.And pixel electrode 1144 can electrically connect through a contact hole CH1 and with active member 1143.
In this embodiment, active member 1143 is a thin film transistor (TFT), and it mainly comprises a grid 1143a, a gate insulation layer 1143b, one source pole 1143c, drain electrode 1143d, a channel layer 1143e, an ohmic contact layer 1143f and a protective seam 1143g.Wherein, grid 1143a and scan wiring 1141a electrically connect, and source electrode 1143c and data wiring 1142a electrically connect, and pixel electrode 1144 is to electrically connect through contact hole CH1 among the protective seam 1143g and drain electrode 1143d.In addition, the material of pixel electrode 1144 for example is indium tin oxide, indium-zinc oxide or other transparent conductive materials.
Transition auxiliary electrode 1145 is same rete with pixel electrode 1144, therefore, transition auxiliary electrode 1145 equally for example is indium tin oxide, indium-zinc oxide or other transparent conductive materials, but transition auxiliary electrode 1145 and pixel electrode 1144 are each other for being electrically insulated, and the two can produce a transverse electric field.In addition, transition auxiliary electrode 1145 is positioned at around the pixel electrode 1144.Please refer to Fig. 2 C, in this embodiment, transition auxiliary electrode 1145 is the left sides that are positioned at pixel electrode 1144, and is adjacent to data wiring 1142a.In addition, transition auxiliary electrode 1145 can be arbitrary shape, be indentation for example, and the side of pixel electrode 1144 corresponds to the shape of transition auxiliary electrode 1145, for example equally also is indentation.
Please also refer to Fig. 2 B and 2C, dot structure 114 also comprises a shared distribution 1146, and this shared distribution 1146 is disposed on first substrate 112, and is parallel to each other with scan wiring 1141a in fact.In this embodiment, shared distribution 1146 is contiguous next bar scan wiring 1141b, and transition auxiliary electrode 1145 is that contact hole CH2 and the shared distribution 1146 that sees through among the protective seam 1143g electrically connects.
Please refer to Fig. 2 A, colorful filter array substrate 120 comprises second substrate 122, an electrode layer 124 and a colored light filter membrane layer 126.Second substrate 122 for example is the substrate of glass substrate, quartz base plate or other suitable materials.Electrode layer 124 is the tops that are disposed at second substrate 122, for example is indium tin oxide, indium-zinc oxide or other suitable conductive materials.Colored light filter membrane layer 126 is to be disposed between second substrate 122 and the electrode layer 124, and it comprises a black matrix (not illustrating) and an a plurality of color filter patterns (not illustrating).
In addition, active component array base board 110 comprises that also an orientation rete 115 covers dot structure 114, and its material can be the poly-hot resin of second vinegar (polyimide resin, PI) or other suitable materials.And a same configurable orientation rete 128 on the electrode layer 124 of colorful filter array substrate 120, this orientation rete 128 has the alignment direction identical or parallel with orientation rete 115.
And the mode that produces transverse electric field in the display panels 100 is described as follows.Usually at this display panels 100 not before the display frame, the transition auxiliary electrode 1145 of dot structure 114 is to be electrically connected at a voltage V with corresponding shared distribution 1146, and corresponding pixel electrode 1144 then is electrically connected at a driving voltage Vd.Voltage V for example is a fixed value, driving voltage Vd then according to want picture displayed and with variation.It should be noted that voltage V can be different from driving voltage Vd.So, can produce a transverse electric field between transition auxiliary electrode 1145 and the pixel electrode 1144.In liquid crystal layer 130, the part liquid crystal molecule that originally was in the extension attitude can be reversed earlier under the effect of transverse electric field.When display panels 100 was done the transition driving, a vertical electric field can put on liquid crystal layer 130, at this moment, can be treated as the transition starting point by the liquid crystal molecule that transverse electric field reverses, and the liquid crystal molecule that therefore can drive other converts bending status fast to.So the present invention can be so that liquid crystal molecule converts bending status more quickly to; In other words, display panels 100 can normally show and present the work performance of rapid answer after transition apace.
Transition auxiliary electrode 1145 and pixel electrode 1144 are made up of identical rete, and be formed at pixel electrode 1144 around.In addition, transition auxiliary electrode 1145 sees through the contact hole CH2 and 1146 electric connections of shared distribution among the protective seam 1143g, by the potential difference (PD) between transition auxiliary electrode 1145 and the pixel electrode 1144 to produce a transverse electric field, to help the transition of liquid crystal molecule.
Fig. 3 A, 3B and 3C illustrate the vertical view that is respectively according to active component array base board in the display panels of other embodiments of the invention.These active component array base boards 110 ', 110 " and 110 " ' structure be identical haply with the active component array base board 110 shown in Fig. 2 C, and its different locating is described as follows.At first, please refer to Fig. 3 A, this active component array base board 110 ' in transition auxiliary electrode 1145 ' be the top that is positioned at data wiring 1142a, therefore, the electric capacity of its loss only is the part of contact hole, to help to promote the aperture opening ratio of display panels.Please refer to Fig. 3 B, in this embodiment, active component array base board 110 " in transition auxiliary electrode 1145 " is between shared distribution 1146 and next bar scan wiring 1141b.At last, please refer to Fig. 3 C, in this embodiment, transition auxiliary electrode 1145 " ' be the top that is positioned at next bar scan wiring 1141b, so, also help to promote the aperture opening ratio of display panels.
In sum, dot structure and display panels proposed by the invention have following advantage at least:
One, in the dot structure of active component array base board of the present invention, can produce a transverse electric field between transition auxiliary electrode and the pixel electrode.In addition, except the cross-pressure up and down of two substrates, the transition auxiliary electrode also and between scan wiring and the data wiring has voltage difference during the liquid crystal molecule transition, so transverse electric field is also arranged around the transition auxiliary electrode.The existence of this transverse electric field can make the arrangement mode of the liquid crystal molecule of subregion change.When display panels was done the transition driving, remaining liquid crystal molecule just can be converted to bending status fast and shorten required transition time of display panels and transition voltage.
Two, the making of dot structure of the present invention and display panels and existing process-compatible, except change wherein the design of several light shield, extra process apparatus need be do not bought more, therefore, the processing procedure of present existing active component array base board can be directly applied to.
Three, because this transition auxiliary electrode can be formed at the scan wiring or the top of data wiring, therefore, the storage capacitors of loss has only the part of contact hole, so that display panels has high aperture opening ratio.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; have in the technical field under any and know the knowledgeable usually; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (18)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101425269A CN100523926C (en) | 2006-10-23 | 2006-10-23 | Pixel structure and liquid crystal display panel using same |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101425269A CN100523926C (en) | 2006-10-23 | 2006-10-23 | Pixel structure and liquid crystal display panel using same |
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| CN101169530A CN101169530A (en) | 2008-04-30 |
| CN100523926C true CN100523926C (en) | 2009-08-05 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011128559A (en) * | 2009-12-21 | 2011-06-30 | Toshiba Mobile Display Co Ltd | Shutter glasses |
| CN102455549B (en) * | 2010-10-27 | 2015-11-04 | 斯坦雷电气株式会社 | Liquid crystal display device |
| CN102053439A (en) * | 2010-11-24 | 2011-05-11 | 深圳市华星光电技术有限公司 | Pixel unit and liquid crystal display panel |
| JP6139163B2 (en) * | 2013-02-14 | 2017-05-31 | スタンレー電気株式会社 | Liquid crystal display |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030020857A1 (en) * | 2001-06-20 | 2003-01-30 | Nec Corporation | OCB type liquid crystal display having transition nucleus area from splay alignment to bend alignment |
| US6603525B2 (en) * | 2001-01-25 | 2003-08-05 | Matsushita Electric Industrial Co., Ltd. | Liquid crystal display |
| CN1570734A (en) * | 2003-07-21 | 2005-01-26 | 友达光电股份有限公司 | Active component array structure and its optical self-compensation birefringence liquid crystal display |
| CN1570735A (en) * | 2003-07-24 | 2005-01-26 | 友达光电股份有限公司 | Active element array structure |
| US20050088578A1 (en) * | 2003-09-29 | 2005-04-28 | Lee Chang-Hun | Optically compensated bend mode liquid crystal display |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6603525B2 (en) * | 2001-01-25 | 2003-08-05 | Matsushita Electric Industrial Co., Ltd. | Liquid crystal display |
| US20030020857A1 (en) * | 2001-06-20 | 2003-01-30 | Nec Corporation | OCB type liquid crystal display having transition nucleus area from splay alignment to bend alignment |
| CN1570734A (en) * | 2003-07-21 | 2005-01-26 | 友达光电股份有限公司 | Active component array structure and its optical self-compensation birefringence liquid crystal display |
| CN1570735A (en) * | 2003-07-24 | 2005-01-26 | 友达光电股份有限公司 | Active element array structure |
| US20050088578A1 (en) * | 2003-09-29 | 2005-04-28 | Lee Chang-Hun | Optically compensated bend mode liquid crystal display |
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