CN2800327Y

CN2800327Y - Liquid crystal display device

Info

Publication number: CN2800327Y
Application number: CN 200420072558
Authority: CN
Inventors: 杨秋莲; 叶圣修; 彭家鹏
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Innolux Corp
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Innolux Corp
Priority date: 2004-08-07
Filing date: 2004-08-07
Publication date: 2006-07-26
Anticipated expiration: 2014-08-07

Abstract

The utility model discloses a liquid crystal display device which comprises a first basal plate, a second basal plate, a liquid crystal layer, two polaroids, a plurality of pixel electrodes, a common electrode, a thin film transistor array and a color filter, wherein the liquid crystal layer is clamped between the first basal plate and the second basal plate, the thin film transistor array, the color filter and the pixel electrodes are arranged on the first basal plate in sequence, and the two polaroids are respectively arranged on the first basal plate and the second basal plate, wherein at least one polaroid is arranged on the inside surface of the corresponding basal plate.

Description

Liquid crystal indicator

[technical field]

The utility model is about a kind of liquid crystal indicator, the liquid crystal indicator of particularly a kind of COA (Color Filter On Array is made in colored filter on the thin-film transistor array base-plate) type.

[background technology]

Liquid crystal indicator is because have characteristics such as low diathermaneity, thin thickness and power consumption be low, thus day by day extensive in the use, and also along with the ripe and innovation of correlation technique, its kind is also various day by day.Traditional thin-film transistor LCD device has usually that aperture opening ratio is low, light utilization efficiency is low and problem such as panel applying difficulty.Traditional liquid crystal indicator aperture opening ratio is low, light utilization efficiency is low and the defective of panel applying difficulty in order to overcome, (the Seiko Instruments ﹠amp of NSK instrument and electronics corporation; Electronics) liquid crystal indicator of a kind of COA technology of proposition, the difference of itself and traditional liquid crystal indicator is: its colored filter is arranged on the thin-film transistor array base-plate, another substrate is then for containing tin indium oxide (IndiumTin Oxide merely, ITO) transparency carrier, thereby improve aperture opening ratio and brightness, also promoted the yield that panel is fitted.

Please refer to Fig. 1, is a kind of structural representation of prior art COA process technique liquid crystal indicator.This liquid crystal indicator 1 comprises first substrate 10, second substrate 20 and liquid crystal layer 30, and this liquid crystal layer 30 is distributed between first substrate 10 and second substrate 20.These first substrate, 10 inside surfaces are provided with a thin film transistor (TFT) array 11, a plurality of pixel electrode 13 and a colored filter 15, wherein this colored filter 15 is arranged on this thin film transistor (TFT) array 11, a plurality of pixel electrodes 13 are set on it, and these second substrate, 20 inside surfaces are provided with a public electrode 22.First substrate 10 and second substrate, 20 outside surfaces attach the mutually

perpendicular polaroid

42,44 in polarization direction respectively.

The polaroid the 42, the 44th that this liquid crystal indicator 1 adopts, ordinary light polarization-type polaroid (Ordinary Type Polarizer), 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

42,44 is that polyvinyl alcohol (PVA) (Polyvinyl Alcohol PVA), because the polyvinyl alcohol (PVA) resistance to elevated temperatures is relatively poor, be no more than 80 ℃ usually, thereby should not use under the environment of higher temperature by display device; And this polaroid the 42, the 44th is attached to the outside surface of

transparency carrier

10,20, very easily by scratch, in the reality, used the two ordinary light polarization-type polaroids that are orthogonally set at 42,44 o'clock, the contrast of image can sharply reduce along with the increase of viewing angle, thereby produces angle limitations.If the display centre with this liquid crystal indicator 1 is that the horizontal line that end points extends to the right is 0 degree position angle datum line, with this horizontal line is that benchmark is rotated counterclockwise all position angles increase by 360 degree, so when real work, this liquid crystal indicator 1 the position angle be 0 degree angle, an angle of 90 degrees, 180 degree angles, 270 degree angles and near the light leak of viewing area comparatively serious, so its image display quality is not good.This two

polaroid

42,44 adopts the outer set-up mode that pastes, polarized light through polaroid 42 effect back gained needs can arrive another polaroid 44 through behind this colored filter 15 earlier, 15 pairs of polarized lights that pass wherein of colored filter produce certain scattering process, thereby, reduce the polarisation efficient and the light transmittance of liquid crystal indicator 1 to damaging through the formed polarized light in polaroid 42 effect backs.

[utility model content]

The technical matters that the utility model solves provides a kind of being difficult for by the liquid crystal indicator of scratch.

The technical matters that the utility model further solves provides the high liquid crystal indicator of a kind of image display quality.

The technical scheme that the utility model technical solution problem is adopted is: a kind of liquid crystal indicator is provided, comprise that two one first substrate, one second substrates, that relatively are provided with are sandwiched in the liquid crystal layer between this two substrates and are separately positioned on two polaroids on this two substrates, this first substrate is provided with thin film transistor (TFT) array and chromatic filter layer, and at least one polaroid is arranged on the inner surface of corresponding substrate.

The above-mentioned polaroid that is arranged on the substrate inner surface is an extraordinary ray polarization-type polaroid.

Compared with prior art, liquid crystal indicator of the present utility model has following advantage: polaroid adopts the set-up mode that is built in corresponding substrate inboard, be difficult for by scratch, polaroid adopts extraordinary ray polarization-type polaroid, the chemically-resistant solvent, and heat resisting temperature reaches 200 ℃, and improve the angular field of view of liquid crystal indicator, effectively improve its image display quality.Adopt the optical axis of a built-in extraordinary ray polarization-type polaroid and an ordinary light polarization-type polaroid parallel to each other, be able to be complementary to the light leak of incident light wave, can effectively compensate the light leakage phenomena of liquid crystal indicator in scope with great visual angle.

[description of drawings]

Fig. 1 is the synoptic diagram 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 utility model liquid crystal indicator first embodiment diagrammatic cross-section.

Fig. 3 is the utility model liquid crystal indicator second embodiment diagrammatic cross-section.

Fig. 4 is the utility model liquid crystal indicator the 3rd embodiment diagrammatic cross-section.

[embodiment]

Please refer to Fig. 2, it is the structural representation of the utility model liquid crystal indicator first embodiment, this liquid crystal indicator 100 comprises that second substrate 120, that first substrate 110, one and this first substrate 110 are oppositely arranged is clipped in the liquid crystal layer 130 of 110,120 of this two substrates.

Set gradually thin film transistor (TFT) array 111, a colored filter 112, a plurality of pixel electrode 114, first polaroid 142 and first both alignment layers 116 on these first substrate, 110 inner surfaces.Be sequentially provided with a public electrode 124, second polaroid 144 and second both alignment layers 126 on these second substrate, 120 inner surfaces.

This pixel electrode 114 and public electrode 124 adopts transparent conductive materials to make, and (Indium Zinc Oxide IZO) etc., is attached to respectively on this first substrate 110 and second substrate 120 as tin indium oxide or indium zinc oxide.

This colored filter 112 is attached on this thin film transistor (TFT) array 111, and this pixel electrode 114, first polaroid 142 and first both alignment layers 116 are successively attached on this colored filter 112.When 110,120 pairs of first, second substrates do not need meticulous action on time.

This first polaroid 142 and the 144 quadrature settings of second polaroid, both polarization axles are vertical mutually.This two polaroid 142,144 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 142,144, and the incident light of ordinary polarization state passes this polaroid and will be absorbed in 142,144 o'clock.The thickness of this two polaroid 142,144 is generally less than 100 microns, and thinner thickness is not so it when being separately positioned on corresponding substrate 110,120 inner surfaces, can cause harmful effect to the operating voltage of liquid crystal indicator 100.

This first polaroid 142 is arranged between liquid crystal layer 130 and the colored filter 112, 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 built in the set-up mode of corresponding substrate inboard, and this two polaroid 142,144 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 142,144 heat resisting temperatures that the utility model adopts are 200 ℃, more high temperature resistant and chemically-resistant solvent, and improve the angular field of view of liquid crystal indicator; Therefore extraordinary ray polarization-type polaroid 142,144 thinner thicknesses own make this liquid crystal indicator 100 more frivolous.Can directly two polaroids 142,144 be plated on the corresponding substrate 110,120 in the processing procedure of this liquid crystal indicator, can save tradition and adopt a large amount of artificial outer costs that paste polaroid.

Please refer to Fig. 3, is the structural representation of the utility model liquid crystal indicator second embodiment.The improvement design that this liquid crystal indicator 200 is a liquid crystal indicator 100, it can further improve the image display 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 244 to replace the extraordinary ray polarization-type polaroid 144 of liquid crystal indicator 100.This liquid crystal indicator 200 comprises an extraordinary ray polarization-type polaroid 242 and an ordinary light polarization-type polaroid 244, wherein, this extraordinary ray polarization-type polaroid 242 is arranged on first substrate, 210 inner surfaces, and this ordinary light polarization-type polaroid 244 is arranged on the outer surface of second substrate 220.

Please refer to Fig. 4, is the structural representation of the utility model liquid crystal indicator the 3rd embodiment.This liquid crystal indicator 300 also comprises an ordinary light polarization-type polaroid 342 and an extraordinary ray polarization-type polaroid 344.This liquid crystal indicator 300 is with the difference of liquid crystal indicator 100: it adopts an ordinary light polarization-type polaroid 342 to replace the extraordinary ray polarization-type polaroid 142 of liquid crystal indicator 100.Wherein, this extraordinary ray polarization-type polaroid 344 is arranged on second substrate, 320 inner surfaces, and this ordinary light polarization-type polaroid 342 is arranged on side surface outside first substrate 310.

Extraordinary ray polarization-type polaroid that employing is parallel to each other and ordinary light polarization-type polaroid, its optical axis is orthogonal, 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 arrange in pairs or groups when using an extraordinary ray polarization-type polaroid and an ordinary light polarization-type polaroid in the liquid crystal indicator of the present utility model, can significantly be reduced in the interior light leak amplitude of scope with great visual angle, further improve the image display quality of liquid crystal indicator.

But, liquid crystal indicator of the present utility model is not limited to first embodiment, second embodiment and the 3rd embodiment, wherein, polaroid 242,244,342,344 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.

In addition, the polarization type liquid crystal indicator can be used in various mode LCDs in the utility model, as stable twisted nematic, vertical orientation type, multi-domain perpendicular alignment-type, plane inner switching type and multiple domain twisted nematic escope etc., and be applicable to the LCD assembly of penetration, reflection-type and semi penetration type.

Claims

1. liquid crystal indicator, comprise that two one first substrate, one second substrates, that relatively are provided with are folded in the liquid crystal layer between this two substrates and are separately positioned on two polaroids of this two substrates, this first substrate is provided with thin film transistor (TFT) array and chromatic filter layer, 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 is an extraordinary ray polarization-type polaroid.

3. as the liquid crystal indicator as described in the claim 2, it is characterized in that: this two polaroid all is arranged within the corresponding substrate on the side surface.

4. liquid crystal indicator as claimed in claim 2 is characterized in that: this polaroid material is an organic dyestuff.

5. liquid crystal indicator as claimed in claim 2 is characterized in that: this polaroid thickness is less than 100 microns.

6. liquid crystal indicator as claimed in claim 1 is characterized in that: further be provided with a plurality of pixel electrodes on this first substrate, it is arranged on the colored filter.

7. liquid crystal indicator as claimed in claim 1 is characterized in that: this second substrate is provided with a public electrode.

8. liquid crystal indicator as claimed in claim 1 is characterized in that: this two polaroids optical axis is orthogonally set.

9. 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.

10. liquid crystal indicator as claimed in claim 9 is characterized in that: this ordinary light polarization-type polaroid is arranged on the outer surface of corresponding substrate.