CN2594830Y

CN2594830Y - Liquid-crystal display devices

Info

Publication number: CN2594830Y
Application number: CN 02250623
Authority: CN
Inventors: 陈杰良; 吕昌岳; 余泰成
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2002-12-21
Filing date: 2002-12-21
Publication date: 2003-12-24
Anticipated expiration: 2012-12-21

Abstract

The utility model relates to a liquid crystal display which comprises an upper substrate, a TFT array substrate and a liquid crystal layer, wherein the liquid crystal layer is composed of a plurality of liquid crystal molecules with dielectric anisotropy and can be encapsulated between the upper substrate and the TFT array substrate. A first alignment layer is formed on the substrate and has a first alignment, a second alignment layer is formed on the TFT array substrate and is corresponding to the first alignment layer, predetermined space is arranged between the second alignment layer and the first alignment layer, and the second alignment layer has a second alignment. An electrode group is formed on the upper substrate and is positioned between the upper substrate and the first alignment layer for generating a parallel electric field which is basically parallel to the upper substrate for rotating the liquid crystal molecules.

Description

LCD

[technical field]

The utility model relates to a kind of LCD, relates in particular to a kind of wide-angle liquid crystal display with good liquid crystal alignment.

[background technology]

LCD has been widely used in various fields, yet has topmost two large problems for traditional LCD.At first, when when certain angle is watched, the brightness of LCD will be lost (deepening) and variable color sharp.Usually have only 90 ° of visual angles for the LCD of older type especially, just the right and left is each 45 °.This problem means for a plurality of beholders can't watch display picture simultaneously.Another main problem promptly is that traditional LCD response time is slower, and the picture that this problem can't satisfy fast moving in film and the recreation shows demand.

IPS (In-Plane Switch, in-plane changes) LCD is based on the problems referred to above of conventional liquid crystal and the solution that proposes, United States Patent (USP) the 6th as bulletin on September 4 calendar year 2001,285, the LCD (shown in Figure 1) that is disclosed for No. 428, this LCD comprises one first substrate 42, and wherein, one first electrode 43 and one second electrode 44 are formed on this first substrate 42; One second substrate 420, with these first substrate, 42 relative and interval one preset distances, wherein, a third electrode 430 and one the 4th electrode 440 form on these second substrates 420; When voltage correspondingly loads on above-mentioned electrode 43,44,430,440, produce one first electric field and one second electric field, this two electric field is parallel to the plane of first substrate 42 and second substrate 420 respectively.This LCD also comprises a polaroid 41, and it is arranged at the outside of first substrate 42, an analyzer 410, and it is arranged at the outside of second substrate 420.

This LCD is with electric field change the becoming electric field that is parallel to orientation substrate perpendicular to orientation substrate of control liquid crystal molecule 450 in the conventional liquid crystal, under the control of this electric field, 450 need of liquid crystal molecule rotate in surface level, and save in vertical direction deflection, can enlarge the visible angle of LCD and improve its response speed.Therefore, for the IPS LCD, whether liquid crystal molecule 450 can effectively be parallel to the level of base plate face will be to determine it could reach a gordian technique at good visual angle, but for this LCD, because of it does not provide a good both alignment layers, can not guarantee liquid crystal molecule 450 forward and backward in on-load voltage all be to be parallel to base plan effectively, thereby can not guarantee that good visual angle enlarges characteristic.

Therefore, for an IPS LCD, provide a kind of can realize the liquid crystal molecule excellent fit to technology very necessary.

[utility model content]

For overcoming the defective that the available liquid crystal display can not well enlarge the visual angle, the utility model provides a kind of wide-angle liquid crystal display with good liquid crystal alignment.

The technical scheme of the utility model technical solution problem is: a LCD is provided, and it comprises one first substrate; One first both alignment layers is formed on above-mentioned first substrate, has first orientation; One second substrate; One second both alignment layers is formed on above-mentioned second substrate, and is relative with above-mentioned first both alignment layers, and has a preset space length between this second both alignment layers and this first both alignment layers, has second orientation; One liquid crystal layer is made up of a plurality of liquid crystal molecules, injects and is packaged between above-mentioned first both alignment layers and second both alignment layers; One electrode group is formed on above-mentioned first substrate, and between above-mentioned first substrate and first both alignment layers, can produce parallel electric field, and this electric field is basically parallel to this first substrate, is used to rotate this liquid crystal molecule; Wherein, the surface configuration of this first both alignment layers and this second both alignment layers is a parallel groove.

When electrode group not during added electric field, contiguous first both alignment layers and the liquid crystal molecule of second both alignment layers are pressed the orientation orientation of first both alignment layers and second both alignment layers respectively, level be positioned at this parallel groove and respectively with the plane parallel of first substrate and second substrate; When the electrode group loaded parallel electric field, liquid crystal molecule horizontally rotated in groove.

Compared with prior art, the utility model LCD realizes the orientation of liquid crystal molecule by an alignment film with parallel groove, guaranteeing that it all can be parallel to base plan effectively in that on-load voltage is forward and backward, thereby the visual angle of realizing this kind LCD enlarges characteristic.

[description of drawings]

Fig. 1 is the three-dimensional exploded view of prior art LCD.

Fig. 2 is the diagrammatic cross-section of the utility model LCD.

Fig. 3 is the schematic perspective view of the utility model LCD first both alignment layers.

Fig. 4 is the schematic perspective view of the utility model LCD second both alignment layers.

Fig. 5 is the not three-dimensional exploded view of added electric field of the utility model LCD.

Fig. 6 is the three-dimensional exploded view that the utility model LCD loads electric field.

[embodiment]

Please refer to Fig. 2, Fig. 3 and Fig. 4, the utility model LCD comprises substrate 200, a tft array substrate 100 and a liquid crystal layer 300 on one, wherein, this liquid crystal layer 300 is made up of a plurality of liquid crystal molecules 310 with dielectric anisotropy, is packaged on this between the substrate 200 and this tft array substrate 100.

Should go up substrate 200 and comprise one second polaroid 210, one second both alignment layers 230 and one second substrate 220, wherein, this second substrate 220 is between this second polaroid 210 and this second both alignment layers 230.This second polaroid 210 is attached on the outside surface of second substrate 220, one shiny surface of this second both alignment layers 230 (not indicating) is attached on the inside surface of second substrate 220, another side has a plurality of second fine parallel grooves 240, this second parallel groove 240 is formed at another surface of second both alignment layers 230 by the method for machining, and this second parallel groove 240 has second orientation.In addition, this second both alignment layers 230 also can be by processing in second substrate, 220 surperficial direct mechanical.Wherein, the height of this first, second parallel groove 190,240 and spacing are comparable with liquid crystal molecule 310 respectively, to realize liquid crystal molecule 310 effective orientations, are parallel to base plan, thereby guarantee that the good visual angle of LCD enlarges.

This tft array substrate 100 comprises one first polaroid 140, one first substrate 110, one first both alignment layers 130 and an electrode group 120, wherein first substrate 110 is between first polaroid 140 and electrode group 120, and first both alignment layers 130 is attached on the inside surface of first substrate 110 at electrode group 120 places.Electrode group 120 comprises one first electrode 121 and one second electrode 122, and when a voltage loads on first electrode 121 and second electrode 122, to produce a parallel electric field between first electrode 121 and second electrode 122, this parallel electric field is parallel to the plane of electrode group 120 places first substrate 110.One shiny surface of this first both alignment layers 130 (indicate) be attached at electrode group 120 on, another surface has a plurality of first fine parallel grooves 190, this first parallel groove 190 is formed at the surface of first both alignment layers 130 by the method for machining, and this first parallel groove 190 has first orientation.Wherein, this first and second parallel groove 190,240 is the V-type groove, and its height and spacing and liquid crystal molecule size are comparable.

Liquid crystal layer 300 is sandwiched between first both alignment layers 130 of second both alignment layers 230 of substrate 200 and tft array substrate 100, wherein, the top liquid crystal molecule 310 of liquid crystal layer 300 is adjacent to second parallel groove 240 of second both alignment layers 230, and bottom liquid crystal molecule 310 is adjacent to first parallel groove 190 of first both alignment layers 130.This first, second parallel groove the 190, the 240th is used to make liquid crystal molecule 310 along its predetermined alignment direction orientation, therefore, be adjacent to that the top liquid crystal molecule 310 of second parallel groove 240 is corresponding to have second orientation, and the bottom liquid crystal molecule 310 that is adjacent to first parallel groove 190 has first orientation accordingly.When the utility model LCD 10 was encapsulated as one, second orientation of first orientation of first both alignment layers 130 and second both alignment layers 230 was perpendicular, and liquid crystal molecule 310 will be by first, second both alignment layers 130,230 orientations, produced 90 ° reverse.The polarization direction of first polaroid 140 is vertical mutually with the polarization direction of second polaroid 210.

Please refer to Fig. 5 and Fig. 6 simultaneously, not during added electric field because the orientation of first, second both alignment layers 130,230, contiguous upper substrate 200 and the liquid crystal molecule 310 of tft array substrate 100 will produce 90 ° relative reversing, thereby after by liquid crystal layer 300, will do 90 ° of optically-actives from the linearly polarized photon of first polaroid 140, change this polarization polarization state of light and consistent with the polarization direction of second polaroid 210, thereby this polarized light will bright state occur by second polaroid 210.And when on-load voltage during in electrode group 120, between first electrode 121 and second electrode 122, will produce an electric field that parallels with first substrate, 110 inside surfaces substantially, then the molecular long axis of liquid crystal molecule 310 is fitly arranged and is made it revolve optical activity at direction of an electric field and loses, thereby the incident linearly polarized photon can't pass through second polaroid 210, presents dark state.

Claims

1. LCD, it comprises: one first substrate; One first both alignment layers forms on above-mentioned first substrate, has first orientation; One second substrate; One second both alignment layers forms on above-mentioned second substrate, and is relative with above-mentioned first both alignment layers, and has a preset space length between this second both alignment layers and this first both alignment layers, has second orientation; One liquid crystal layer is made up of plural liquid crystal molecule, injects and is packaged between above-mentioned first both alignment layers and second both alignment layers; One electrode group forms on above-mentioned first substrate, between above-mentioned first substrate and first both alignment layers, produces parallel electric field, and this electric field is basically parallel to this first substrate, is used to rotate this liquid crystal molecule; It is characterized in that: the surface configuration of this first both alignment layers and this second both alignment layers is a parallel groove.

2. LCD according to claim 1 is characterized in that the V-type groove that this parallel groove system makes by machining.

3. LCD according to claim 1 is characterized in that height of this parallel groove and liquid crystal molecule are comparable, is used to realize the orientation of liquid crystal molecule.

4. LCD according to claim 1 is characterized in that distance is comparable with liquid crystal molecule between this parallel groove, is used to realize the orientation of liquid crystal molecule.

5. LCD according to claim 1 is characterized in that this first orientation is vertical with second orientation.

6. LCD according to claim 1, the long axis direction that it is characterized in that this liquid crystal molecule is consistent with the parallel groove direction when added electric field not, and the long axis direction of liquid crystal molecule is consistent with direction of an electric field when loading parallel electric field.

7. LCD according to claim 1 is characterized in that the V-type groove of this second both alignment layers for forming in this second substrate surface direct mechanical processing.