CN1664665A - Liquid crystal display device - Google Patents
Liquid crystal display device Download PDFInfo
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- CN1664665A CN1664665A CN 200410026431 CN200410026431A CN1664665A CN 1664665 A CN1664665 A CN 1664665A CN 200410026431 CN200410026431 CN 200410026431 CN 200410026431 A CN200410026431 A CN 200410026431A CN 1664665 A CN1664665 A CN 1664665A
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- liquid crystal
- polaroid
- crystal indicator
- transparency carrier
- polarization
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Abstract
This invention relates to a liquid crystal display device which comprises the first clarity base plate, the second clarity base plate, two polariod slices, several picture-element electrodes and a common electrode, wherein, the liquid crystal layer is installed between the first clarity base plate and the second clarity base plate, and several picture-element electrodes and a common electrode are installed in the first clarity base plate, and the two polariod slices are installed in the first clarity base plate and the second clarity base plate separately, and at least one polariod slice is installed inside the relative base plate.
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, IPS) liquid crystal indicator.
[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, the 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.
Seeing also Fig. 1, is a kind of structural representation of prior art plane inner switching type liquid crystal displaying apparatus.This liquid crystal indicator 1 comprises that two relative first transparency carriers 10 and second transparency carrier 20, are arranged on the liquid crystal layer 30 between this first transparency carrier 10 and second transparency carrier 20.A plurality of public electrodes 11, a transparent insulating layer 12, a plurality of pixel electrode 13 are arranged on the inner surface of this first transparency carrier 10, and first alignment film 14 is arranged on this transparent insulating layer 12.One colored filter 25 and second alignment film 24 are arranged on the inner surface of second transparency carrier 20 in regular turn, and the mutually perpendicular polaroid 40,41 in a pair of polarization direction is attached to the outer surface of transparency carrier 10,20 respectively.
The polaroid the 40, the 41st that this 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 40,41 is that (Polyvinyl Alcohol PVA), because the PVA resistance to elevated temperatures is relatively poor, be no more than 80 ℃ usually, so this display device is not suitable for using polyvinyl alcohol (PVA) under the environment of higher temperature; And this polaroid the 40, the 41st is attached to the outer surface of transparency carrier 10,20, very easily by scratch.And in the reality, the two ordinary light polarization-type polaroids that use is orthogonally set 40,41 o'clock, the contrast 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 40,41 o'clock, this liquid crystal indicator 1 is spent angles, 270 degree angles and its near zone light leak comparatively serious (seeing also the light areas of Fig. 3) in 0 degree angle, an angle of 90 degrees, 180, influences image displaying quality.This two polaroid 40,41 adopts the outer set-up mode that pastes, polarized light through polaroid 40 effect back gained needs can arrive another polaroid 41 earlier behind this colored filter 25, the polarized light that 25 pairs of colored filters pass wherein can produce certain scattering process, thereby formed polarized light after polaroid 40 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 the not good defective of prior art plane inner switching type liquid crystal displaying apparatus image displaying quality, the invention provides a kind of liquid crystal indicator with plane inner switching type of good display quality.
The invention provides the liquid crystal indicator of plane inner switching type, it comprises one first transparency carrier, one second transparency carrier, two polaroids, a plurality of pixel electrode and public electrode, this liquid crystal layer is arranged between this first transparency carrier and this second transparency carrier, these a plurality of pixel electrodes and public electrode are arranged on this first transparency carrier, this two polaroid is separately positioned on this first transparency carrier and second transparency carrier, and at least one polaroid is arranged on the inner surface of corresponding substrate.
Two polaroids of LCD of the present invention all adopt extraordinary ray polarization-type polaroid, and this two polaroid all is arranged on the inner surface of corresponding substrate; Perhaps adopt the collocation of an extraordinary ray polarization-type polaroid and an ordinary light polarization-type polaroid to use, wherein this extraordinary ray polarization-type polaroid is arranged on the inner surface of corresponding substrate.
Compared with prior art, liquid crystal indicator of the present invention has following advantage: polaroid adopts the set-up mode that is built in corresponding substrate inboard, is difficult for by scratch; Emergent light just enters colored filter after through two polaroid effects, therefore eliminates the destruction that colored filter causes polarized light, improves the polarisation efficient and the light transmittance of liquid crystal indicator; And at least one polaroid is an extraordinary ray polarization-type polaroid, the chemically-resistant solvent, and heat resisting temperature reaches 200 ℃, makes liquid crystal indicator all can obtain higher contrast in bigger angular field of view, effectively improves its image displaying quality.
When built-in extraordinary ray polarization-type polaroid and the collocation of ordinary light polarization-type polaroid are used, because the extraordinary ray polarization-type polaroid that is orthogonally set and the optical axis of ordinary light polarization-type polaroid are orthogonal, light leak to incident light wave be able to be complementary, 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 diagrammatic cross-section of prior art liquid crystal indicator, and wherein two polaroids are outer being 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 structural representation of liquid crystal indicator first embodiment of the present invention.
Fig. 5 is the contrast response curve synoptic diagram of the extraordinary ray polarization-type polaroid of liquid crystal indicator of the present invention 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 light leak characteristic synoptic diagram of the extraordinary ray polarization-type polaroid of liquid crystal indicator 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 liquid crystal layer 130 between this two substrates 110,120.
These first transparency carrier, 110 inner surfaces are provided with a plurality of public electrodes 111, a transparent insulating layer 112, a plurality of pixel electrode 113, first polaroid 141 and first both alignment layers 116.Be sequentially provided with a colored filter 127, second polaroid 143 and second both alignment layers 126 on these second transparency carrier, 120 inner surfaces.
This public electrode 111 and pixel electrode 113 are vertical bar shape transparency electrodes that parallel interval is provided with, all attached on this first transparency carrier 110, it all adopts transparent conductive material to make, as tin indium oxide (Indium Tin Oxide, ITO) or indium zinc oxide (Indium ZincOxide, IZO) etc.
This insulation course 112 is transparent insulation resin materials, and it makes this public electrode 111 and pixel electrode 113 keep insulation attached on this public electrode 111 and the pixel electrode 113.This first polaroid 141 and this first both alignment layers 116 are successively attached on this insulation course 112.When applying a driving voltage, can produce an electric field with level (plane that is parallel to substrate) direction between this public electrode 111 and the pixel electrode 113, this electric field can make the liquid crystal molecule of liquid crystal layer 130 rotate in surface level.
This first polaroid 141 and second polaroid 143 are the quadrature setting, and both polarization directions are vertical mutually.This two polaroid 141,143 is extraordinary ray polarization-type polaroid (Extraordinary Type Polarizer), it is made by the organic dyestuff with liquid crystal phase (Liquid-crystallinePhase), its polarized light property is: the incident light of extraordinary polarization state can pass this polaroid 141,143, and 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, and thinner thickness is not so when being separately positioned on corresponding substrate 110,120 inner surfaces, can cause harmful effect to the operating voltage of liquid crystal indicator 100.
Please consult Fig. 2 and Fig. 5 simultaneously, Fig. 5 is the contrast response curve synoptic diagram of the liquid crystal indicator 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 degree are to+50 degree approximately) its contrast in scope with great visual angle.Compare as can be known at the contrast response curve of different visual angles scope with the liquid crystal indicator of employing ordinary light polarization-type polaroid shown in Figure 2 from this curve, the ordinary light polarization-type polaroid that liquid crystal indicator 100 of the present invention adopts built-in extraordinary ray polarization-type polaroid 141,143 to replace traditional external labeling type has following advantage: when using extraordinary ray polarization-type polaroid, compare traditional ordinary light polarization-type polaroid, 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 corresponding substrate 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 improve the image displaying quality of liquid crystal indicator 100; And adopt the set-up mode that is built in corresponding substrate inboard, this two polaroid 141,143 is difficult for by scratch.In addition, traditional general heat resisting temperature of ordinary light polarization-type polaroid only is 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 itself thinner thickness of extraordinary ray polarization-type polaroid 141,143 makes this liquid crystal indicator 100 more frivolous.In the processing procedure of this liquid crystal indicator 100, can directly two polaroids 141,143 be plated on the corresponding substrate 110,120, 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 improvement design that this liquid crystal indicator 200 is liquid crystal indicators 100, it can further improve the image displaying quality of liquid crystal indicator 100.This liquid crystal indicator 200 is with the difference of liquid crystal indicator 100: it adopts an ordinary light polarization-type polaroid 243 to replace the extraordinary ray polarization-type polaroid 143 of liquid crystal indicator 100.Wherein, this extraordinary ray polarization-type polaroid 241 is arranged on first transparency carrier, 210 inner surfaces, and this ordinary light polarization-type polaroid 243 is arranged on the outer surface of second transparency carrier 220.
Seeing also Fig. 7, is the structural representation of liquid crystal indicator the 3rd embodiment of the present invention.This liquid crystal indicator 300 also comprises an extraordinary ray polarization-type polaroid 341 and an ordinary light polarization-type polaroid 343.This liquid crystal indicator 300 is with the difference of liquid crystal indicator 100: it adopts an ordinary light polarization-type polaroid 343 to replace the extraordinary ray polarization-type polaroid 143 of liquid crystal indicator 100.Wherein, this extraordinary ray polarization-type polaroid 341 is arranged on second transparency carrier, 320 inner surfaces, and this ordinary light polarization-type polaroid 343 is arranged on the outer surface of first transparency carrier 310.
Please consult Fig. 3 and Fig. 8 simultaneously, Fig. 8 is the light leak characteristic synoptic diagram of the liquid crystal indicator 100 of the present invention's extraordinary ray polarization-type polaroid of adopting two mutual quadratures, adopt the liquid crystal indicator 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, extraordinary ray polarization-type polaroid can be complementary to the light leak of any angle incident light wave with combining of ordinary light polarization-type polaroid, thereby the present invention second, the liquid crystal indicator 200 of the 3rd embodiment, an extraordinary ray polarization-type polaroid 241 is used in collocation in 300,341 and one ordinary light polarization-type polaroid 243,343 o'clock, 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.
In addition, polaroid 241,243,341,343 in the liquid crystal indicator 200,300 also can adopt two extraordinary ray polarization-type polaroids entirely, wherein, one extraordinary ray polarization-type polaroid is arranged on the inner surface of corresponding substrate, and another extraordinary ray polarization-type polaroid then is arranged on the outer surface of corresponding substrate.The pixel electrode 113 of liquid crystal indicator 100,200,300 also can be herring-bone form or the design of other bending shape.
Claims (10)
1. liquid crystal indicator, it comprises one first transparency carrier, one second transparency carrier, two polaroids, a plurality of pixel electrode and public electrode, this liquid crystal layer is arranged between this first transparency carrier and this second transparency carrier, these a plurality of pixel electrodes and public electrode are arranged on this first transparency carrier, this two polaroid is separately positioned on this first transparency carrier and second transparency carrier, it is characterized in that: at least one polaroid is arranged on the inner surface of corresponding substrate.
2. liquid crystal indicator as claimed in claim 1 is characterized in that: this two polaroid all is extraordinary ray polarization-type polaroids.
3. liquid crystal indicator as claimed in claim 2 is characterized in that: this two polaroid all is arranged on the inner surface of corresponding substrate.
4. liquid crystal indicator as claimed in claim 1 is characterized in that: this two polaroid comprises an extraordinary ray polarization-type polaroid and an ordinary light polarization-type polaroid.
5. liquid crystal indicator as claimed in claim 4 is characterized in that: this extraordinary ray polarization-type polaroid is arranged on the inner surface of corresponding substrate.
6. liquid crystal indicator as claimed in claim 1 is characterized in that: between this first transparency carrier and this liquid crystal layer both alignment layers is set.
7. liquid crystal indicator as claimed in claim 1 is characterized in that: between this second transparency carrier and this liquid crystal layer both alignment layers is set.
8. liquid crystal indicator as claimed in claim 7 is characterized in that: between this second transparency carrier and this both alignment layers colored filter is set.
9. liquid crystal indicator as claimed in claim 1 is characterized in that: this pixel electrode is a vertical bar shaped.
10. liquid crystal indicator as claimed in claim 1 is characterized in that: this pixel electrode is crooked shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410026431 CN1664665A (en) | 2004-03-05 | 2004-03-05 | Liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410026431 CN1664665A (en) | 2004-03-05 | 2004-03-05 | Liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1664665A true CN1664665A (en) | 2005-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410026431 Pending CN1664665A (en) | 2004-03-05 | 2004-03-05 | Liquid crystal display device |
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| CN (1) | CN1664665A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501982A (en) * | 2016-12-13 | 2017-03-15 | 昆山龙腾光电有限公司 | Compound liquid crystal indicator |
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2004
- 2004-03-05 CN CN 200410026431 patent/CN1664665A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501982A (en) * | 2016-12-13 | 2017-03-15 | 昆山龙腾光电有限公司 | Compound liquid crystal indicator |
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