CN2763849Y

CN2763849Y - LCD device

Info

Publication number: CN2763849Y
Application number: CN 200420083692
Authority: CN
Inventors: 杨秋莲; 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: 2004-08-31
Filing date: 2004-08-31
Publication date: 2006-03-08
Anticipated expiration: 2014-08-31

Abstract

The utility model provides a liquid crystal display device comprising an upper base plate, a lower base plate correspondingly equipped with the upper base plate, a liquid crystal layer, a common electric pole and a plurality of picture element electric poles. The liquid crystal layer is positioned between the upper base plate and the lower base plate; the common electric pole is positioned between the inner surface of one base plate of the upper base plate and the lower base plate and the liquid crystal layer. The picture element electronic poles are positioned on the common electric pole and at least one part of each picture element electric pole adopts the structure of arc shape. A plurality of electric fields whose directions are parallel to the upper base plate and the lower base plate are formed between the picture element electric poles and the common electric pole and thus the color difference can be further compensated.

Description

Liquid crystal indicator

[technical field]

The utility model relates to a kind of liquid crystal indicator, relates in particular to a kind of reflective LCD device.

[background technology]

Liquid crystal indicator is according to its unusual three kinds of reflective LCD device, penetration liquid crystal display device and half penetrated liquid crystal indicator that are divided into that adopt light source.Reflective LCD device is to utilize external light source to provide to show required light beam, and this light source is mainly natural light, also can be outside artificial light sources, is generally positioned at the reflective LCD device outside, and this type of liquid crystal indicator can the amount of saving energy.Reflective LCD device has been widely used in videophone, the portable digital-assistant (Personal Digital Assistant, PDA) and various computer installations in.

Seeing also Fig. 1, is a kind of reflective LCD device schematic perspective view that the United States Patent (USP) of on June 24th, 2003 bulletin is disclosed for the 6th, 583, No. 842.This liquid crystal indicator comprises: an infrabasal plate 11 and a upper substrate 12; Liquid crystal layer 13 between infrabasal plate 11 and upper substrate 12; Be positioned at the public electrode 111 of infrabasal plate 11 upper surfaces; Be positioned at the pixel electrode 112 on the

public electrode

111, and 112 of public electrode 111 and pixel electrodes separate with insulation course 113, when then adding voltage, form an edge electric field between pixel electrode 112 and the public electrode 111; 13 of infrabasal plate 11 and liquid crystal layers form a both alignment layers 114; Form a both alignment layers 124 between upper substrate 12 and liquid crystal layer; The outside surface of upper substrate 12 forms a polaroid 125.This liquid crystal indicator is to be provided with a reflection horizon so that surround lighting is reflected, to reach the effect of utilizing surround lighting to show on infrabasal plate 11.(112 of its public electrode 111 and pixel electrodes constitute a parallel electric field, and liquid crystal molecule 130 is rotated in the plane parallel with substrate for Fring Field Swithing, FFS) technology because this reflective LCD device adopts the fringe field conversion.

See also Fig. 2, be these reflective LCD device pixel electrode 112 structural representations.((date line) provides electric signal to pixel electrode 112 to gate line 116 (gate line) control TFT 117 by data line 118 for Thin Film Transistor, TFT) electric switch.Because this pixel electrode 112 adopts the strip shaped electric poles structure, when therefore adding voltage, the fringe field direction of

pixel electrode

112 and 111 generations of public electrode is unique, thereby just defines visible angle, and its viewing angle characteristic is not good.

[utility model content]

For overcoming the not good problem of liquid crystal indicator viewing angle characteristic in the prior art, the utility model provides a kind of viewing angle characteristic preferable liquid crystal indicator.

One technical scheme of the utility model technical solution problem is: the infrabasal plate, a liquid crystal layer, a public electrode and a plurality of pixel electrode that provide a kind of liquid crystal indicator to comprise a upper substrate, be oppositely arranged with upper substrate, this liquid crystal layer is between upper substrate and infrabasal plate, this public electrode is arranged between the inside surface and liquid crystal layer of the substrate in upper substrate and the infrabasal plate, this pixel electrode is arranged on the public electrode, wherein, its at least a portion of each pixel electrode adopts arc structure.

Compared to prior art, because at least one part of this pixel electrode adopts convex structure, so can form a multiple domain electric field between pixel electrode and the public electrode, the aberration that this multiple domain electric field causes can compensate mutually.When this pixel electrode was S shape, itself and public electrode produced a multiple domain electric field, further compensate for chromatic aberration, and therefore, this reflective LCD device contrast on all directions strengthens, thereby viewing angle characteristic is better.

[description of drawings]

Fig. 1 is a kind of prior art reflective LCD device floor map.

Fig. 2 is a reflective LCD device pixel electrode structure synoptic diagram shown in Figure 1.

Fig. 3 is the utility model liquid crystal indicator first embodiment floor map.

Fig. 4 is the utility model liquid crystal indicator first embodiment pixel electrode structure synoptic diagram.

Fig. 5 is the enlarged diagram of area I among Fig. 4.

Fig. 6 is the utility model liquid crystal indicator second embodiment floor map.

Fig. 7 is the utility model liquid crystal indicator the 3rd embodiment floor map.

Fig. 8 is the utility model liquid crystal indicator the 3rd embodiment pixel electrode structure synoptic diagram.

Fig. 9 is the enlarged diagram of area I I among Fig. 8.

[embodiment]

Seeing also Fig. 3, is the diagrammatic cross-section of liquid crystal indicator first embodiment of the present utility model, and this liquid crystal indicator is a reflective LCD device.Reflective LCD device of the present utility model comprises a upper substrate 22, the infrabasal plate 21, a liquid crystal layer 23, a public electrode 211 and a plurality of pixel electrode 212 that are oppositely arranged with it.This liquid crystal layer 23 is between upper substrate 22 and infrabasal plate 21, and this public electrode 211 is arranged on the inside surface of infrabasal plate 21, and this pixel electrode 212 is arranged on the public electrode 211.

In addition, the inside surface of upper substrate 22 also is provided with a both alignment layers 224, and its outside surface is provided with a polaroid 225; 212 of public electrode 211 and pixel electrodes are provided with insulation course 213, are provided with both alignment layers 214 between pixel electrode 212 and insulation course 213 and the liquid crystal layer.Wherein this public electrode 211 is the reflection electrodes with reflecting properties, because public electrode 211 is a plane electrode, thereby

pixel electrode

212 and 211 formation of public electrode, one edge electric field, and this pixel electrode 212 comprises two parts at least, these two parts adopt Z-shaped structure respectively to the different directions bending as this pixel electrode 212; This polaroid 225 also can be arranged between upper substrate 22 inside surfaces and the both alignment layers 224.

See also Fig. 4 and Fig. 5, Fig. 4 is the reflective LCD device first embodiment pixel electrode structure synoptic diagram of the present utility model, and Fig. 5 is the enlarged diagram of area I among Fig. 4.Gate line 216 control TFT 217 electric switches provide electric signal to pixel electrode 212 by data line 218.Because pixel electrode 212 adopts Z-shaped structure, thereby it can produce the electric field of two different directions after applying voltage, the direction of an electric field and the direction of an electric field below the broken line bending place that are its top, broken line bending place in the area I are inconsistent, liquid crystal molecule 230 its yawing moments and the liquid crystal molecule 230 below the broken line bending place that then are positioned at top, broken line bending place in the area I are inconsistent, make this pixel on display effect, be divided into two zones, the aberration that two zones cause can compensate mutually, thereby viewing angle characteristic is better.Data line 218 can adopt the zigzag structure identical with pixel electrode 212, also can adopt rectilinear structure.

In addition, public electrode 211 also can adopt transparency electrode, and reflects by outside surface or the 219 pairs of incident lights of infrabasal plate 21 and public electrode 211 addings, one reflection horizon at infrabasal plate 21, and this reflection horizon also can be arranged at the lower surface of infrabasal plate 21.Reflection horizon 219 can be multilayer and has reflecting properties material formation.

Seeing also Fig. 6, is the diagrammatic cross-section of reflective LCD device second embodiment of the present utility model.The reflective LCD device of this embodiment is compared with the reflective LCD device of first embodiment, only public electrode 2110 surfaces are provided with a plurality of projectioies (Bump), the insulation course 2130 of public electrode 2110 and 214 of both alignment layers is relative to be made with public electrode 2110 structural designs, and all the other structures are identical with the reflective LCD device of first embodiment.These public electrode 2110 surfaces are gone up and are formed a plurality of projectioies, can greatly improve the incident light reflecting effect.

In addition, public electrode 211 also can adopt transparency electrode, and by adding a reflection horizon at the outside surface of infrabasal plate 21 or

infrabasal plate

21 and 211 of public electrodes incident light is reflected, and this reflection horizon also can be arranged at the lower surface of infrabasal plate 21.The reflection horizon can be multilayer and has reflecting properties material formation.Also can form a plurality of projectioies on these 219 surfaces, reflection horizon, to improve the incident light reflecting effect.

Seeing also Fig. 7, is the diagrammatic cross-section of reflective LCD device the 3rd embodiment of the present utility model.Reflective LCD device of the present utility model comprises that an infrabasal plate 31, a upper substrate 32, are positioned at liquid crystal layer 33, a public electrode 321 and a plurality of pixel electrode 322 of 32 of infrabasal plate 31 and upper substrates.This liquid crystal layer 33 is between upper substrate 32 and infrabasal plate 31, and this public electrode 321 is arranged between the inside surface and liquid crystal layer of upper substrate, and this pixel electrode 322 is arranged on the public electrode 321.

In addition, these upper substrate 32 outside surfaces also are provided with polaroid 325,322 of public electrode 321 and pixel electrodes are provided with insulation course 323, be provided with both alignment layers 324 between pixel electrode 322 and insulation course 323 and the liquid crystal layer 33,321 of pixel electrode 322 and public electrodes form an edge electric field, and these pixel electrode 322 at least a portion adopt arc structure, as adopting the sigmoid curve structure; These infrabasal plate 31 inside surfaces are provided with reflection horizon 319 and both alignment layers 314 successively.

See also Fig. 8 and Fig. 9, Fig. 8 is the reflective LCD device second embodiment pixel electrode structure synoptic diagram of the present utility model, and Fig. 9 is the enlarged diagram of area I I among Fig. 8.Gate line 326 control TFT 327 electric switches provide electric signal to pixel electrode 322 by data line 328.Because pixel electrode 322 adopts S shape structure, thereby its direction of an electric field is a continually varying behind the adding voltage, form a continuous domain electric field, because liquid crystal molecule 330 is along direction of an electric field deflection, so liquid crystal molecule 330 yawing moments also are to change continuously in the pixel region, make this pixel form continuous domain on display effect, the aberration that continuous domain causes can compensate mutually, therefore, this reflective LCD device contrast on all directions strengthens, thereby viewing angle characteristic is better.

Wherein, its reflection horizon 319 of this reflective LCD device also can be arranged on the outside surface of infrabasal plate.These 319 surfaces, reflection horizon also can be provided with a plurality of projectioies, to improve the incident light reflecting effect.

Claims

1. liquid crystal indicator, infrabasal plate, a liquid crystal layer, a public electrode and a plurality of pixel electrode that it comprises a upper substrate, is oppositely arranged with upper substrate, this liquid crystal layer is between upper substrate and infrabasal plate, this public electrode is arranged between the inside surface and liquid crystal layer of the substrate in upper substrate and the infrabasal plate, this pixel electrode is arranged on the public electrode, it is characterized in that: its at least a portion of each pixel electrode adopts arc structure.

2. liquid crystal indicator as claimed in claim 1 is characterized in that: this pixel electrode is a S shape structure.

3. liquid crystal indicator as claimed in claim 1 is characterized in that: this public electrode is the reflecting electrode with reflecting properties.

4. liquid crystal indicator as claimed in claim 3 is characterized in that: this public electrode is arranged on the inside surface of infrabasal plate.

5. liquid crystal indicator as claimed in claim 4 is characterized in that: this public electrode surface has some projectioies.

6. liquid crystal indicator as claimed in claim 1 is characterized in that: this public electrode is for adopting the transparency electrode of transparent material.

7. liquid crystal indicator as claimed in claim 6 is characterized in that: be provided with one deck reflection horizon between the inside surface of this infrabasal plate and public electrode.

8. liquid crystal indicator as claimed in claim 6 is characterized in that: the outside surface of this infrabasal plate is provided with one deck reflection horizon.

9. as claim 7 or 8 described liquid crystal indicators, it is characterized in that: this surface, reflection horizon has some projectioies.

10. liquid crystal indicator as claimed in claim 1 is characterized in that: this infrabasal plate is provided with a plurality of data lines, and it is electrically connected with pixel electrode by thin film transistor (TFT).

11. liquid crystal indicator as claimed in claim 10 is characterized in that: this data line comprises two parts at least, and these two parts are respectively to the different directions bending.

12. liquid crystal indicator as claimed in claim 10 is characterized in that: this data line adopts linear structure.