CN100426075C - Liquid crystal display device - Google Patents
Liquid crystal display device Download PDFInfo
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- CN100426075C CN100426075C CNB2004100264326A CN200410026432A CN100426075C CN 100426075 C CN100426075 C CN 100426075C CN B2004100264326 A CNB2004100264326 A CN B2004100264326A CN 200410026432 A CN200410026432 A CN 200410026432A CN 100426075 C CN100426075 C CN 100426075C
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- liquid crystal
- crystal indicator
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- transparency carrier
- polarization
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Abstract
The present invention relates to a liquid crystal display which comprises a first transparent basal plate, a second transparent basal plate, a liquid crystal layer, a pixel electrode, a common electrode and a polarizing slice, wherein the liquid crystal layer is arranged between the first transparent basal plate and the second transparent basal plate. The pixel electrode and the common electrode are both arranged on the first transparent basal plate. The polarizing slice is arranged on the inner side surface of the second transparent basal plate. The first transparent basal plate is also provided with a reflecting slice.
Description
[technical field]
The invention relates to a kind of liquid crystal indicator, particularly about a kind of plane inner switching type (In-Plane Switching, liquid crystal indicator IPS).
[background technology]
Liquid crystal indicator because have low diathermaneity, characteristics such as volume is frivolous and power consumption is low, so day by day extensive on using, and along with the ripe and innovation of correlation technique, its kind is also various day by day.
Usually when the user watched liquid crystal indicator from different perspectives, the contrast of image can reduce along with the increase of viewing angle, the visual angle defective of Here it is liquid crystal indicator.Be twisted nematic (the Twisted Nematic that overcomes early stage appearance, TN) and super-twist nematic (Super Twisted Nematic, STN) there is the narrow defective in visual angle in liquid crystal indicator, HIT (Hitachi) takes the lead in proposing a kind of plane inner switching type (In-PlaneSwitching Mode, wide viewing angle liquid crystal display device IPS).This kind plane inner switching type liquid crystal displaying apparatus and traditional twisted nematic, difference of super-twist nematic liquid crystal indicator are: its public electrode and pixel electrode are arranged on the same substrate, utilize the electric field that is parallel to substrate that produces between public electrode and the pixel electrode that liquid crystal molecule is rotated being parallel on the plane of substrate, thereby possess wide viewing angle and the fast characteristic of liquid crystal molecule response speed.
A kind of penetrating type plane inner switching type liquid crystal displaying apparatus of prior art can be consulted No. the 6th, 177,973, the United States Patent (USP) of January 23 calendar year 2001 bulletin, as shown in Figure 1.This liquid crystal indicator 1 comprises that two relative first transparency carrier 10 and second transparency carrier 15, liquid crystal layers 14 are distributed between this first transparency carrier 10 and second transparency carrier 15.
The demonstration of this liquid crystal indicator 1 relies on the light that its backlight arrangement (figure does not show) is sent fully, because backlight arrangement is the main energy-dissipating device of entire liquid crystal display device, account for half of all power consumptions, make this liquid crystal indicator 1 power consumption big, be unfavorable for energy-conservation.
The polaroid 19,17 that this liquid crystal indicator 1 adopts is ordinary light polarization-type polaroid (Ordinary Type Polarizer) normally, and the polarized light property of this ordinary light polarization-type polaroid is: the incident light of ordinary polarization state can pass; When passing, the incident light of extraordinary polarization state will be absorbed.The main material of this polaroid 19,17 is that (PolyvinylAlcohol PVA), because the PVA resistance to elevated temperatures is relatively poor, be no more than 80 ℃ usually, thereby display device is not suitable for using polyvinyl alcohol (PVA) under the environment of higher temperature; And this polaroid the 19, the 17th is attached to the outer surface of transparency carrier 10,15, very easily by scratch.In the reality, the two ordinary light polarization-type polaroids that use is orthogonally set 19,17 o'clock, the contrast rate of change of image can sharply reduce (as shown in Figure 2) along with the increase of viewing angle, thereby produces angle limitations; And, the two ordinary light polarization-type polaroids that use is orthogonally set 19,17 o'clock, this liquid crystal indicator 1 is spent angles, 270 degree angles and near zone light leak thereof comparatively serious (seeing also the light areas of Fig. 3) at 0 degree angle, an angle of 90 degrees, 180, influences image displaying quality.This two polaroid 19,17 adopts the outer set-up mode that pastes, polarized light through gained after polaroid 17 effects needs can arrive another polaroid 19 earlier behind colored filter (figure does not show), colored filter produces certain scattering process to the polarized light that passes wherein, thereby formed polarized light after polaroid 17 effect damaged, reduce the polarisation efficient and the light transmittance of liquid crystal indicator 1, influence its image displaying quality.
[summary of the invention]
In order to overcome prior art plane inner switching type liquid crystal displaying apparatus power consumption height and the not good defective of image displaying quality, the invention provides a kind of energy-conservation and have a plane inner switching type liquid crystal displaying apparatus of good display quality.
The invention provides another kind of liquid crystal indicator, it comprises first transparency carrier, second transparency carrier, one liquid crystal layer, pixel electrode and public electrode and two polaroids, this liquid crystal layer is arranged between this first transparency carrier and this second transparency carrier, this pixel electrode and public electrode all are arranged on first transparency carrier, also be provided with a reflector plate on this first transparency carrier, this two polaroid is respectively the ordinary light polarization-type polaroid that an extraordinary ray polarization-type polaroid and that is arranged on contiguous this liquid crystal layer one side of a transparency carrier wherein is arranged on another transparency carrier outer surface.
Compared with prior art, liquid crystal indicator of the present invention has following advantage: adopt the design that attaches a reflector plate on first transparency carrier, make this liquid crystal indicator can effectively utilize external environment light, therefore need not use the big backlight arrangement of power consumption, reach purpose of energy saving.Adopt single built-in polaroid or at least one polaroid to be built in the set-up mode of corresponding substrate inner surface, polaroid is difficult for by scratch, and can eliminate the destruction of colored filter to polarized light, improve polarisation efficient and light transmittance, thereby promote the image displaying quality of liquid crystal indicator.Adopt extraordinary ray polarization-type polaroid, its chemically-resistant solvent, and heat resisting temperature reaches 200 ℃, and make liquid crystal indicator all can obtain higher contrast in bigger angular field of view, effectively improve image displaying quality.Adopt a built-in extraordinary ray polarization-type polaroid and an ordinary light polarization-type polaroid to arrange in pairs or groups when using, because the mutually orthogonal extraordinary ray polarization-type polaroid and the optical axis of ordinary light polarization-type polaroid be able to be complementary to the light leak of incident light wave, the light leakage phenomena of liquid crystal indicator in scope with great visual angle can be effectively compensated, the image displaying quality of liquid crystal indicator can be further promoted.
[description of drawings]
Fig. 1 is the structural representation of prior art liquid crystal indicator, and wherein two polaroids are outer being attached on the outer surface of corresponding substrate.
Fig. 2 is that prior art adopts the contrast response curve synoptic diagram of the liquid crystal indicator of ordinary light polarization-type polaroid in the different visual angles scope.
Fig. 3 is the light leak characteristic synoptic diagram that prior art adopts the liquid crystal indicator of ordinary light polarization-type polaroid.
Fig. 4 is the structural representation of liquid crystal indicator first embodiment of the present invention.
Fig. 5 is that the present invention adopts the contrast response curve synoptic diagram of the liquid crystal indicator of extraordinary ray polarization-type polaroid in the different visual angles scope.
Fig. 6 is the structural representation of liquid crystal indicator second embodiment of the present invention.
Fig. 7 is the structural representation of liquid crystal indicator the 3rd embodiment of the present invention.
Fig. 8 is the structural representation of liquid crystal indicator the 4th embodiment of the present invention.
Fig. 9 is the liquid crystal indicator light leak characteristic synoptic diagram of the extraordinary ray polarization-type polaroid that adopts of the present invention.
[embodiment]
Fig. 4 is the structural representation of liquid crystal indicator first embodiment of the present invention, this liquid crystal indicator 100 comprise one first transparency carrier 110, one and second transparency carrier 120, that is oppositely arranged of this first transparency carrier 110 be arranged on the liquid crystal layer 130 of 120 of this first transparency carrier 110 and this second transparency carriers.
These first transparency carrier, 110 inner surfaces are provided with a reflector plate 119, a plurality of public electrodes 111 and pixel electrode 113 are arranged alternately on this reflector plate 119, one insulation course 112 covers this a plurality of public electrodes 111 and pixel electrode 113, also is provided with both alignment layers 116 on this insulation course 112.Be sequentially provided with both alignment layers 126 on a colored filter 127, the polaroid 143 and on these second transparency carrier, 120 inner surfaces.
The strip like transparent electrode that this public electrode 111 and pixel electrode 113 are provided with for parallel interval, all attached on this reflector plate 119, it all adopts transparent conductive material to make, as tin indium oxide (Indium Tin Oxide, ITO) or indium zinc oxide (Indium Zinc Oxide, IZO) etc.
This insulation course 112 is made by the transparent insulation material attached on this reflector plate 119, this public electrode 111 and the pixel electrode 113, makes this public electrode 111 and pixel electrode 113 keep insulation.When applying a driving voltage, can produce an electric field that is parallel to the in-plane of first transparency carrier 110 between this public electrode 111 and the pixel electrode 113, make this electric field that the liquid crystal molecule of liquid crystal layer 130 is rotated in the plane that is parallel to first transparency carrier 110.
This polaroid 143 is extraordinary ray polarization-type polaroid (Extraordinary TypePolarizer), make by organic dyestuff with liquid crystal phase (Liquid-crystalline Phase), polarized light property is: the incident light of extraordinary polarization state can pass this polaroid 143, will be absorbed when the incident light of ordinary polarization state passes this polaroid 143.The thickness of this polaroid 143 is generally less than 100 microns, thinner thickness, thereby can not influence Electric Field Distribution between two transparency carriers 110,120 when being arranged on second transparency carrier, 120 inner surfaces, therefore can not cause harmful effect to the operating voltage of liquid crystal indicator 100 yet.
This reflector plate 119 is attached on this first transparency carrier 110, this reflector plate 119 adopts the dielectric resin material, as with the overlapping setting of tellurium film (DI) of the polystyrene film (Polystyrene) of antiradar reflectivity and high reflectance and constitute, these two kinds of materials all are dielectric materials, have the advantage of not disturbing the electric field that produces between pixel electrode 113 and the public electrode 111.During liquid crystal indicator 100 work, external environment light becomes the incident light of extraordinary polarization state after by second transparency carrier 120 and polaroid 143, pass liquid crystal layer 130 and arrive reflector plate 119, the incident light of this extraordinary polarization state is through reflector plate 119 reflected back liquid crystal layers 130, outgoing behind the polaroid 143 and second transparency carrier 120 reaches Presentation Function again.Therefore liquid crystal indicator 100 of the present invention effectively utilizes external environment light by reflector plate 119, therefore need not use the big backlight arrangement of power consumption, reaches purpose of energy saving.
Consult shown in Figure 5, this curve is that the present invention adopts liquid crystal indicator 100 contrast response curves of extraordinary ray polarization-type polaroid in the different visual angles scope, and it is less that this curve display goes out the amplitude of variation of liquid crystal indicator 100 of the present invention (-50 degree angles are to+50 degree angles approximately) its contrast in scope with great visual angle.Compare at the contrast response curve of different visual angles scope with the liquid crystal indicator 1 of employing ordinary light polarization-type polaroid shown in Figure 2, the ordinary light polarization- type polaroid 19,17 that liquid crystal indicator of the present invention 100 adopts built-in extraordinary ray polarization-type polaroid 143 to replace traditional external labeling type has following advantage: when using extraordinary ray polarization-type polaroid 143, compare traditional ordinary light polarization- type polaroid 19,17, it all can obtain higher contrast in bigger angular field of view, thereby promotes the display quality of its image.
This polaroid 143 is arranged between the liquid crystal layer 130 and colored filter 127 of second transparency carrier, 120 inboards, can eliminate the destruction and the scattering of 127 pairs of polarized lights of colored filter, improve polarisation efficient and light transmittance, thereby can further promote the image displaying quality of liquid crystal indicator 100; And adopt the set-up mode that is built in second transparency carrier, 120 inboards, this polaroid 143 is difficult for by scratch.In addition, traditional ordinary light polarization- type polaroid 19,17 general heat resisting temperatures only are 80 ℃, non-refractory, and extraordinary ray polarization-type polaroid 143 heat resisting temperatures that the present invention adopts are 200 ℃, and are more high temperature resistant; And itself thinner thickness of extraordinary ray polarization-type polaroid 143 makes this liquid crystal indicator 100 more frivolous.Can directly polaroid 143 be plated on second transparency carrier 120 in the processing procedure of this liquid crystal indicator 100, can save tradition and adopt a large amount of artificial outer costs that paste polaroid.
Seeing also Fig. 6, is the structural representation of liquid crystal indicator second embodiment of the present invention.The structure of this liquid crystal indicator 200 and liquid crystal indicator 100 is roughly the same, and the difference of itself and liquid crystal indicator 100 is: between reflector plate 219 on first transparency carrier, 210 inner surfaces and following both alignment layers 216 polaroid 241 once is set.This time polaroid 241 is an extraordinary ray polarization-type polaroid, this time polaroid 241 and the 243 quadrature settings of last polaroid, and both polarizing axis directions are vertical mutually.
Seeing also Fig. 7, is the structural representation of liquid crystal indicator the 3rd embodiment of the present invention.The structure of this liquid crystal indicator 300 and liquid crystal indicator 100 is roughly the same, the difference of itself and liquid crystal indicator 100 is: this reflector plate 319 is arranged on the outer surface of liquid crystal indicator 300 first transparency carriers 310, and once polaroid 341 is arranged between this reflector plate 319 and first transparency carrier 310.This time polaroid 341 is an ordinary light polarization-type polaroid, this time polaroid 341 and the 343 quadrature settings of last polaroid, and both polarizing axis directions are vertical mutually.
Seeing also Fig. 8, is the structural representation of liquid crystal indicator the 4th embodiment of the present invention.The structure of this liquid crystal indicator 400 and liquid crystal indicator 100 is roughly the same, the difference of itself and liquid crystal indicator 100 is: go up polaroid 443 and be arranged on the outer surface of second transparency carrier 420, between reflector plate 419 on first transparency carrier, 410 inner surfaces and following both alignment layers 416 polaroid 441 once is set.Should go up polaroid 443 is ordinary light polarization-type polaroid, this time polaroid 441 and the 443 quadrature settings of last polaroid, and both polarizing axis directions are vertical mutually.
See also Fig. 3 and Fig. 9, Fig. 9 is the light leak characteristic synoptic diagram that adopts the extraordinary ray polarization-type polaroid liquid crystal indicator of two mutual quadratures, adopt the light leak characteristic schematic images of two mutual quadrature ordinary light polarization-type polaroids to compare with Fig. 3, adopt the optical axis of mutually orthogonal extraordinary ray polarization-type polaroid and ordinary light polarization-type polaroid orthogonal as can be known, the combination of extraordinary ray polarization-type polaroid and ordinary light polarization-type polaroid can be complementary to the light leak of incident light wave, thereby the present invention the 3rd, the liquid crystal indicator 300 of the 4th embodiment, when an extraordinary ray polarization-type polaroid and an ordinary light polarization-type polaroid are used in collocation in 400, can significantly be reduced in the interior light leak amplitude of scope with great visual angle, further improve the image displaying quality of liquid crystal indicator.
Certainly, in first, second of liquid crystal indicator of the present invention and the 4th embodiment, also reflector plate can be attached to the outer surface of first transparency carrier, pixel electrode and public electrode can be vertical bar shape or curve strip.Because liquid crystal indicator utilization of the present invention attaches reflector plate, effectively utilizes external environment light, therefore need not use the big backlight arrangement of power consumption, reach purpose of energy saving.
Claims (8)
1. liquid crystal indicator, comprise first transparency carrier, second transparency carrier, one liquid crystal layer, a plurality of pixel electrodes and public electrode, two polaroids, this liquid crystal layer is arranged between this first transparency carrier and this second transparency carrier, this pixel electrode and public electrode all are arranged on first transparency carrier, it is characterized in that: also be provided with a reflector plate on this first transparency carrier, this two polaroid is respectively the ordinary light polarization-type polaroid that an extraordinary ray polarization-type polaroid and that is arranged on contiguous liquid crystal layer one side of a transparency carrier wherein is arranged on another substrate outer surface.
2. liquid crystal indicator as claimed in claim 1 is characterized in that: this ordinary light polarization-type polaroid is arranged on the outer surface of this first transparency carrier.
3. liquid crystal indicator as claimed in claim 2 is characterized in that: this reflector plate is arranged on this ordinary light polarization-type polaroid surface away from this liquid crystal layer.
4. liquid crystal indicator as claimed in claim 3 is characterized in that: this liquid crystal indicator comprises that further one is arranged on the colored filter between this second transparency carrier and this extraordinary ray polarization-type polaroid.
5. liquid crystal indicator as claimed in claim 1 is characterized in that: this extraordinary ray polarization-type polaroid is arranged on contiguous this liquid crystal layer one side of this second transparency carrier.
6. liquid crystal indicator as claimed in claim 5 is characterized in that: this reflector plate is arranged on the surface of this ordinary light polarization-type polaroid.
7. liquid crystal indicator as claimed in claim 1 is characterized in that: the thickness of this extraordinary ray polarization-type polaroid is less than 100 microns.
8. liquid crystal indicator as claimed in claim 1 is characterized in that: the polarizing axis of this extraordinary ray polarization-type polaroid is perpendicular to the polarizing axis of this ordinary light polarization-type polaroid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100264326A CN100426075C (en) | 2004-03-05 | 2004-03-05 | Liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100264326A CN100426075C (en) | 2004-03-05 | 2004-03-05 | Liquid crystal display device |
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| Publication Number | Publication Date |
|---|---|
| CN1664666A CN1664666A (en) | 2005-09-07 |
| CN100426075C true CN100426075C (en) | 2008-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100264326A Expired - Fee Related CN100426075C (en) | 2004-03-05 | 2004-03-05 | Liquid crystal display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111308776A (en) * | 2020-04-23 | 2020-06-19 | 深圳市汇凌信息技术有限公司 | Liquid crystal box and display device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6124907A (en) * | 1998-04-24 | 2000-09-26 | Ois Optical Imaging Systems, Inc. | Liquid crystal display with internal polarizer and method of making same |
| JP2001318381A (en) * | 2000-05-09 | 2001-11-16 | Matsushita Electric Ind Co Ltd | Liquid crystal display panel |
| CN1389754A (en) * | 2001-06-06 | 2003-01-08 | 精工爱普生株式会社 | Liquid crystal displaying device and electronic device |
| WO2003010594A1 (en) * | 2001-07-26 | 2003-02-06 | Optiva, Inc. | Liquid crystal display and the method of its fabrication |
| US20030112391A1 (en) * | 2001-12-18 | 2003-06-19 | Samsung Electronics, Co., Ltd | Transmissive and reflective type liquid crystal display |
| JP2003344837A (en) * | 2002-05-24 | 2003-12-03 | Nec Corp | Semitransmissive liquid crystal display device |
-
2004
- 2004-03-05 CN CNB2004100264326A patent/CN100426075C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6124907A (en) * | 1998-04-24 | 2000-09-26 | Ois Optical Imaging Systems, Inc. | Liquid crystal display with internal polarizer and method of making same |
| JP2001318381A (en) * | 2000-05-09 | 2001-11-16 | Matsushita Electric Ind Co Ltd | Liquid crystal display panel |
| CN1389754A (en) * | 2001-06-06 | 2003-01-08 | 精工爱普生株式会社 | Liquid crystal displaying device and electronic device |
| WO2003010594A1 (en) * | 2001-07-26 | 2003-02-06 | Optiva, Inc. | Liquid crystal display and the method of its fabrication |
| US20030112391A1 (en) * | 2001-12-18 | 2003-06-19 | Samsung Electronics, Co., Ltd | Transmissive and reflective type liquid crystal display |
| JP2003344837A (en) * | 2002-05-24 | 2003-12-03 | Nec Corp | Semitransmissive liquid crystal display device |
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| CN1664666A (en) | 2005-09-07 |
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Granted publication date: 20081015 Termination date: 20180305 |