CN1641437A - Liquid crystal display device - Google Patents
Liquid crystal display device Download PDFInfo
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- CN1641437A CN1641437A CN 200410015087 CN200410015087A CN1641437A CN 1641437 A CN1641437 A CN 1641437A CN 200410015087 CN200410015087 CN 200410015087 CN 200410015087 A CN200410015087 A CN 200410015087A CN 1641437 A CN1641437 A CN 1641437A
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- liquid crystal
- crystal indicator
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- polaroid
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Abstract
This invention is about a kind of liquid crystal display device including a first basal board, a second basal board, a liquid crystal layer nipped between the first and the second basal board, two light-polarizing slices respectively equipped on the first and the second basal board and a apheliotropic lamp-house. There equips pels electrode and common electrode the electric field of which has vectors in the aclinic direction. Thereinto a electric half-reflecting membrane clings to the second basal board. Furthermore at least one light-polarizing slice is unusual light polarizability. The two light-polarizing slices are both equipped at the inside of the corresponding basal board.
Description
[technical field]
The present invention relates to a kind of liquid crystal indicator, particularly a kind of wide viewing angle type liquid crystal indicator.
[background technology]
Liquid crystal indicator is because it has characteristics such as low diathermaneity, thin thickness and power consumption be low, and is day by day extensive in the use, 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, thereby produced angle limitations.For overcoming twisted nematic (Twisted Nematic, TN) and super-twist nematic (Super Twisted Nematic, STN) the narrow defective in liquid crystal indicator visual angle, HIT (Hitachi) proposes rotary mode (In-Plane Switching, wide viewing angle liquid crystal display device IPS) in a kind of plane.This kind IPS type liquid crystal indicator and traditional TN, the difference of stn liquid crystal display device are that its public electrode and pixel electrode are arranged on the same substrate, utilize the horizontal direction component part of electric field that has that produces between public electrode and the pixel electrode that liquid crystal molecule is rotated in the plane, thereby possess wide viewing angle and the fast characteristic of liquid crystal molecule response speed.
Please refer to Fig. 1, prior art penetrating type IPS type liquid crystal indicator 1 comprises that two relative transparent lower substrate 10 and upper substrate 20, liquid crystal molecules 30 are distributed between this infrabasal plate 10 and the upper substrate 20.One transparent common electrode 11, a transparent insulating layer 12, a transparent pixels electrode 13 are arranged on this infrabasal plate 10 inside surfaces, and once alignment film 14 is attached on this transparent insulating layer 12.Alignment film 24 is arranged on upper substrate 20 inside surfaces in regular turn on one colored filter 25 and, and the mutually perpendicular polaroid 30,40 in a pair of polarization direction is attached to infrabasal plate 10, last 20 outside surface respectively.
The demonstration of prior art liquid crystal indicator 1 relies on the light that its module backlight (figure does not show) is sent fully, because module backlight 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 the 30, the 40th that prior art liquid crystal indicator 1 adopts, ordinary light polarization-type polaroid (Ordinary Type Polarizer), the polarized light property of this kind 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 30,40 is that (PolyvinylAlcohol PVA), because the PVA resistance to elevated temperatures is relatively poor, is no more than 80 ℃ to polyvinyl alcohol (PVA) usually, thereby display device is unsuitable under the higher temperature environment and uses; And this polaroid 30,40 is attached to the outside surface of substrate 10,20, very easily by scratch, thereby makes the application of liquid crystal indicator 1 be subjected to certain limitation.In the reality, the two ordinary light polarization-type polaroids that use is orthogonally set 30,40 o'clock, the contrast of image can sharply reduce (please refer to shown in Fig. 2 curve) along with the increase of viewing angle, thereby produces angle limitations; And used two ordinary light polarization-type polaroids being orthogonally set at 30,40 o'clock, display device 1 influences the image display quality 0 ° of angle, 90 °, 180 °, 270 ° and near zone light leak thereof comparatively serious (please refer to the light areas of Fig. 3).This two polaroid 30,40 adopts the outer set-up mode that pastes, resulting polarized light needs could arrive another polaroid 40 through behind this colored filter 25 earlier after polaroid 30 effects, 25 pairs of polarized lights that pass wherein of colored filter produce certain scattering process, thereby to damaging through the formed polarized light in polaroid 30 effect backs, reduce the polarisation efficient and the light transmittance of liquid crystal indicator 1, influence the image display quality.
[summary of the invention]
For solving that the power consumption of prior art liquid crystal indicator is big, range of application is little and can't guaranteeing the defective of display quality, the invention provides a kind of consume energy low, have wide range of applications and can guarantee the liquid crystal indicator of display quality.
The technical solution adopted for the present invention to solve the technical problems is: a liquid crystal indicator is provided, it comprises first substrate, second substrate, be clipped in the liquid crystal layer between this first substrate and this second substrate, be separately positioned on this first, two polaroids on second substrate and a backlight, this second substrate is provided with pixel electrode and public electrode, the electric field that this pixel electrode and this public electrode form has the horizontal direction vector, wherein this second substrate attachment has a dielectric half reflection film, and at least one polaroid is an extraordinary ray polarization-type polaroid, and this two polaroid all is arranged on corresponding substrate inboard.
Compared with prior art, the advantage of liquid crystal indicator of the present invention is: adopt the design of a dielectric half reflection film, both can utilize the light that module backlight sent of this liquid crystal indicator inside, can use external environment light again, make the demonstration of liquid crystal indicator not exclusively rely on module backlight, reach energy-saving effect, make the application of liquid crystal indicator more extensive.Polaroid adopts the set-up mode that is arranged on corresponding substrate inboard, is difficult for by scratch, and can eliminates the destruction of colored filter to polarized light, improves polarisation efficient and light transmittance, thereby promotes the image display quality of liquid crystal indicator.Polaroid adopts extraordinary ray polarization-type polaroid, chemically-resistant solvent, and heat resisting temperature reaches 200 ℃, and make liquid crystal indicator all can obtain higher contrast in scope with great visual angle, effectively improve its image display quality.When adopting the collocation of built-in extraordinary ray polarization-type polaroid and ordinary light polarization-type polaroid to use, because the mutually orthogonal extraordinary ray polarization-type polaroid and the optical axis of ordinary light polarization-type polaroid are parallel to each other, light leak to incident light wave be able to be complementary, the effective light leakage phenomena of compensation liquid crystal indicator in scope with great visual angle can further promote the image display quality of liquid crystal indicator.
[description of drawings]
Fig. 1 is the diagrammatic cross-section of prior art liquid crystal indicator, and wherein two polaroids are attached on the outer surface of corresponding substrate.
Fig. 2 is the contrast response curve synoptic diagram of the ordinary light polarization-type polaroid of prior art liquid crystal indicator in the different visual angles scope.
Fig. 3 is the light leak characteristic synoptic diagram of the ordinary light polarization-type polaroid of prior art liquid crystal indicator.
Fig. 4 is the diagrammatic cross-section 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 extraordinary ray polarization-type polaroid in the different visual angles scope.
Fig. 6 is the light leak characteristic synoptic diagram that the present invention adopts extraordinary ray polarization-type polaroid.
[embodiment]
Fig. 4 is the diagrammatic cross-section of liquid crystal indicator first embodiment of the present invention, liquid crystal indicator 100 of the present invention comprises that upper substrate 120, that an infrabasal plate 110, one and this infrabasal plate 110 are oppositely arranged is sandwiched in the liquid crystal layer 130 of 110,120 of this two substrates and is positioned at the module backlight (figure does not show) of these infrabasal plate 110 belows.
These infrabasal plate 110 inner surfaces are provided with a dielectric half reflection film 119, a public electrode 111, an insulation course 112, a pixel electrode 113, once polaroid 141 and both alignment layers 116 once.Be disposed with on the colored filter 127, a both alignment layers 126 on the polaroid 143 and on these upper substrate 120 inner surfaces.
This dielectric half reflection film 119 is attached on this infrabasal plate 110, this dielectric half reflection film 119 be two kinds of dielectric materials such as tin indium oxide (Indium Tin Oxide, ITO), staggered successively pressure of titania (TiO2) forms, and is 7 to 9 layers of structure.Because this ITO and TiO2 are transparent material, and have higher and lower refractive index respectively, this characteristic makes this dielectric half reflection film 119 have reflection simultaneously and penetrates function.Both the light that can utilize module backlight to send can utilize external environment light to provide light source for demonstration again, made the demonstration of this liquid crystal indicator 100 not exclusively depend on the light that this module backlight provides, and reached energy-conservation effect.Wherein this dielectric half reflection film 119 also can be attached to the outer surface of this infrabasal plate 110.
This public electrode 111 and pixel electrode 113 adopts transparent conductive materials to make, and (Indium Zinc Oxide, IZO) etc., the strip like transparent electrode that is provided with for parallel interval is on this dielectric half reflection film 119 as ITO or indium zinc oxide.
This insulation course 112 adopts the transparent insulation material attached on this dielectric half reflection film 119 and this public electrode 111 and the pixel electrode 113, makes this public electrode 111 and pixel electrode 113 keep insulation.When applying driving voltage, generation one has the electric field of horizontal direction vector between this public electrode 111 and the pixel electrode 113, and this electric field can make the liquid crystal molecule of liquid crystal layer 130 planar rotate.
This time polaroid 141 and this time both alignment layers 116 are successively attached on this insulation course 112.Wherein this upper and lower polaroid 143,141 all is an extraordinary ray polarization-type polaroid.
This time polaroid 141 and the 143 quadrature settings of last polaroid, both polarization directions are vertical mutually.This two polaroid 141,143 adopts extraordinary ray polarization-type polaroid, and it is made by the organic dyestuff with liquid crystal phase (Liquid-crystalline Phase), and its polarized light property is: the incident light of extraordinary polarization state can pass this polaroid 141,143; The incident light of ordinary polarization state passes this polaroid and will be absorbed in 141,143 o'clock.The thickness of this two polaroid 141,143 is generally less than 100 microns, thinner thickness, so it can cause harmful effect to the operating voltage of liquid crystal indicator 100 when being separately positioned on corresponding substrate 110,120 inner surfaces hardly.
Please refer to Fig. 5, this curve is the contrast response curve of the extraordinary ray polarization-type polaroid that adopts of the present invention 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 ° to+50 ° approximately) its contrast in scope with great visual angle.Contrast at the contrast response curve of different visual angles scope from this curve and the second figure ordinary light polarization-type polaroid, can demonstrate liquid crystal indicator 100 of the present invention adopts the ordinary light polarization-type polaroid of the traditional external labeling type of built-in extraordinary ray polarization-type polaroid 141,143 replacements to have following advantage: when using extraordinary ray polarization-type polaroid, compare traditional ordinary light polarization-type polaroid, it can obtain higher contrast in bigger angular field of view, thereby promotes the display quality of its image.
This two polaroid 141,143 is arranged between the liquid crystal layer and colored filter 127 of corresponding substrate 110,120 inboards, can eliminate destruction and the scattering of colored filter to polarized light, improve polarisation efficient and light transmittance, thereby can further promote the image display quality of liquid crystal indicator 100; And this employing is arranged on the set-up mode of corresponding substrate inboard, makes this two polaroid 141,143 be difficult for being made the application of liquid crystal indicator 100 more wider by scratch.In addition, traditional general heat resisting temperature of ordinary light polarization-type polaroid only has 80 ℃, non-refractory, and extraordinary ray polarization-type polaroid 141,143 heat resisting temperatures that the present invention adopts are 200 ℃, more high temperature resistant and chemically-resistant solvent; And extraordinary ray polarization-type polaroid 141,143 thinner thicknesses own, make this liquid crystal indicator 100 more frivolous.This liquid crystal indicator can directly be plated on two polaroids 141,143 on the corresponding substrate 110,120 in processing procedure, can save tradition and adopt a large amount of artificial outer costs that paste polaroid.
Liquid crystal indicator second embodiment of the present invention and first embodiment are roughly the same, are the improvement designs at liquid crystal indicator 100 in first embodiment, can promote the display quality of image.In the present embodiment, the difference of this liquid crystal indicator and liquid crystal indicator 100 is: it adopts an ordinary light polarization-type polaroid to replace the extraordinary ray polarization-type polaroid 143 of liquid crystal indicator 100.This liquid crystal indicator comprises an extraordinary ray polarization-type polaroid and an ordinary light polarization-type polaroid, and wherein, this extraordinary ray polarization-type polaroid and this ordinary light polarization-type polaroid are separately positioned on the inner surface of upper and lower substrate.
The 3rd embodiment and second embodiment of liquid crystal indicator of the present invention are roughly the same, and its difference is that the last polaroid of this liquid crystal indicator is an extraordinary ray polarization-type polaroid in the present embodiment, and following polaroid is an ordinary light polarization-type polaroid.
Please refer to Fig. 6, it is the ordinary light polarization-type polaroid light leak characteristic synoptic diagram that adopts two mutual quadratures, adopt the light leak characteristic schematic images of two mutual quadrature extraordinary ray polarization-type polaroids to contrast with Fig. 3, the combination that can find out extraordinary ray polarization-type polaroid and ordinary light polarization-type polaroid can be complementary to the light leak of any angle incident light wave, thereby when in the liquid crystal indicator of the present invention the collocation of an extraordinary ray polarization-type polaroid and an ordinary light polarization-type polaroid being used, can significantly be reduced in the light leak amplitude in the scope with great visual angle.
In above-mentioned three kinds of embodiments of liquid crystal indicator of the present invention, dielectric half reflection film 119 can be attached to the outer surface of infrabasal plate, pixel electrode and public electrode can be vertical bar shape or curve strip.
Claims (10)
1. liquid crystal indicator, it comprises first substrate, second substrate, be clipped in liquid crystal layer between this first substrate and this second substrate, be separately positioned on two polaroids and a backlight on this first, second substrate, wherein second substrate is provided with pixel electrode and public electrode, the electric field that this pixel electrode and this public electrode form has the horizontal direction vector, it is characterized in that: this second substrate attachment has a dielectric half reflection film, and at least one polaroid is an extraordinary ray polarization-type polaroid, and this two polaroid all is arranged on corresponding substrate inboard.
2. liquid crystal indicator as claimed in claim 1 is characterized in that: this liquid crystal indicator is the super-twist nematic liquid crystal indicator.
3. liquid crystal indicator as claimed in claim 1 is characterized in that: this liquid crystal indicator is the twisted nematic liquid crystals display device.
4. liquid crystal indicator as claimed in claim 1 is characterized in that: this pixel electrode is that transparent conductive material makes.
5. liquid crystal indicator as claimed in claim 1 is characterized in that: this public electrode is that transparent conductive material makes.
6. liquid crystal indicator as claimed in claim 1 is characterized in that: this dielectric half reflection film is that staggered pressure of different transparent conductive materials makes.
7. liquid crystal indicator as claimed in claim 6 is characterized in that: this dielectric half reflection film is attached to the second substrate inner surface.
8. liquid crystal indicator as claimed in claim 1 is characterized in that: this dielectric half reflection film is attached to the second substrate outer surface.
9. liquid crystal indicator as claimed in claim 1 is characterized in that: this extraordinary ray polarization-type polaroid is arranged on the second substrate inboard.
10. liquid crystal indicator as claimed in claim 1 is characterized in that: this extraordinary ray polarization-type polaroid is arranged on the first substrate inboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410015087 CN1641437A (en) | 2004-01-05 | 2004-01-05 | Liquid crystal display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410015087 CN1641437A (en) | 2004-01-05 | 2004-01-05 | Liquid crystal display device |
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| CN1641437A true CN1641437A (en) | 2005-07-20 |
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| CN 200410015087 Pending CN1641437A (en) | 2004-01-05 | 2004-01-05 | Liquid crystal display device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331636A (en) * | 2011-09-27 | 2012-01-25 | 昆山龙腾光电有限公司 | Liquid crystal display panel and three-dimensional display device |
| CN102385195A (en) * | 2011-09-28 | 2012-03-21 | 昆山龙腾光电有限公司 | 2D (dimensional)/3D switching display equipment and manufacturing method thereof |
| CN103365026A (en) * | 2012-03-28 | 2013-10-23 | 株式会社东芝 | Liquid crystal lens device and image display device |
| CN106526958A (en) * | 2017-01-20 | 2017-03-22 | 深圳市华星光电技术有限公司 | Display panel and liquid crystal display equipment |
-
2004
- 2004-01-05 CN CN 200410015087 patent/CN1641437A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331636A (en) * | 2011-09-27 | 2012-01-25 | 昆山龙腾光电有限公司 | Liquid crystal display panel and three-dimensional display device |
| CN102385195A (en) * | 2011-09-28 | 2012-03-21 | 昆山龙腾光电有限公司 | 2D (dimensional)/3D switching display equipment and manufacturing method thereof |
| CN103365026A (en) * | 2012-03-28 | 2013-10-23 | 株式会社东芝 | Liquid crystal lens device and image display device |
| CN106526958A (en) * | 2017-01-20 | 2017-03-22 | 深圳市华星光电技术有限公司 | Display panel and liquid crystal display equipment |
| WO2018133176A1 (en) * | 2017-01-20 | 2018-07-26 | 深圳市华星光电技术有限公司 | Display panel and liquid crystal display device |
| US10288929B2 (en) | 2017-01-20 | 2019-05-14 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Display panels and liquid crystal display devices |
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