CN2696003Y

CN2696003Y - Liquid crystal display device

Info

Publication number: CN2696003Y
Application number: CN 200420043932
Authority: CN
Inventors: 赖建廷; 彭家鹏; 陈鹊如
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Innolux Corp
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Innolux Corp
Priority date: 2004-03-20
Filing date: 2004-03-20
Publication date: 2005-04-27
Anticipated expiration: 2014-03-20

Abstract

The utility model provides a liquid crystal display device. The utility model comprises a first base plate and a second base plate which are arranged in opposite, a liquid crystal layer provided between the two base plates, a plurality of brake polars arranged on the second base plate, an insulating layer arranged on the second base plate and the plurality of brake polars, a plurality of data lines arranged on the insulating layer, a passivating layer arranged on the insulating layer and the plurality of data lines, and a plurality of pixel electrodes and common electrodes arranged on the passivating layer; wherein, the projection of the plurality of common electrodes on the second base plate overlaps the projection of the plurality of data lines on the second base plate. The liquid crystal display device of the utility model has the advantages of high aperture efficiency and high image display quality.

Description

Liquid crystal indicator

[technical field]

The utility model is about a kind of liquid crystal indicator, particularly about a kind of plane inner switching type liquid crystal displaying apparatus (In-Plane Switching Liquid Crystal Display, IPSLCD).

[background technology]

Liquid crystal indicator can be divided into three types of reflective, penetration and semi-reflectives according to the mode of utilizing of incident light.Liquid crystal indicator has the substrate of pair of opposing, and the cell gap of two substrates remains definite value about making by the distribution interval dose, and has liquid crystal to inject between this two substrates.When applying driving voltage, liquid crystal molecule deflects, and utilizes the electrooptical effect of liquid crystal, and liquid crystal indicator is finished Presentation Function.

The IPS lcd technology is with electric field change the become electric field that be parallel to orientation substrate of control liquid crystal in traditional liquid crystal indicator perpendicular to orientation substrate, under the control of this electric field, liquid crystal molecule only needs to rotate in being parallel to the plane of substrate, and saves deflection in vertical direction.

The visual angle that this kind IPS lcd technology can improve liquid crystal indicator, but because its common electrode and pixel electrode are arranged on the same substrate, so aperture opening ratio is lower.

Lower and cause the problem of picture deepening in order to solve IPS liquid crystal indicator aperture opening ratio, Sharp Corp developed a kind of superelevation aperture opening ratio technology (Ultra High A perture ratio, UHA).This technology is behind the SHA of Sharp (Super High Aperture ratio) technique improvement.The SHA technology at first is provided with resin insulating barrier on data line, be processed to form thin film transistor (TFT) (Thin Film Transistor, TFT) wiring then on this insulation course.The UHA technology then changes the data line material into aluminium by tantalum.Because the resistivity of aluminium is lower, therefore can under the prerequisite that guarantees certain resistance, reduces wiring width, thereby improve aperture opening ratio.

In general, be accompanied by the raising of TFT LCDs resolution, the ratio of the shared display area of data line increases, and covers the part bias light and causes the low and picture dimness of aperture opening ratio.The width of cutting down wiring certainly addresses this problem, but can cause the cloth line resistance to increase simultaneously again, is difficult to make the best of both worlds.

Seeing also Fig. 1, is the diagrammatic cross-section of prior art liquid crystal indicator.This liquid crystal indicator 1 comprises first substrate 11 and second substrate 14 that is oppositely arranged, and a plurality of liquid crystal molecules 16 are arranged in order and are distributed between this second substrate 14 and first substrate 11; A plurality of common electrodes 15 and a transparent insulating layer 20 are successively set on this second transparency carrier, 14 contiguous liquid crystal molecule 16 1 sides; A plurality of pixel electrodes 27 and a plurality of data line 17 are arranged on this transparent insulating layer 20, and wherein, these a plurality of common electrodes 15 are parallel being interspersed to produce transverse electric field 25 with these a plurality of pixel electrodes 27 in the projection of this second substrate 14; These a plurality of common electrodes 15 and these a plurality of data lines 17 are alternate settings, and both projections on second substrate 14 are not overlapping; One second both alignment layers, 19 contiguous liquid crystal molecules 16 are provided with so that the same pretilt angle that liquid crystal molecule 16 produces with respect to second substrate 14; One is located at the passivation layer 18 between this second both alignment layers 19 and this transparent insulating layer 20, in order to these a plurality of pixel electrodes 27 and data line 17 are protected; One color filter layers 12 and one first both alignment layers 13 are located at a side of the vicinity liquid crystal molecule 16 of first substrate 11 successively.

A plurality of common electrodes 15 of the prior art liquid crystal indicator 1 and a plurality of data line 17 are alternate settings, and both projections on second substrate 14 are not overlapping, therefore the bias light that comes from second substrate 14 is covered by common electrode 15 and whole data line 17, this part crested light can't cause the picture dimness by 11 outgoing of first substrate.

[utility model content]

For overcoming the problem that prior art liquid crystal indicator aperture opening ratio is lower, the image display quality is relatively poor, the utility model provides the liquid crystal indicator that a kind of aperture opening ratio is higher, the image display quality is preferable.

The technical scheme that the utility model technical solution problem is adopted is: a kind of liquid crystal indicator is provided, it comprises first substrate and second substrate that is oppositely arranged, one is located at the liquid crystal layer between this two substrates, a plurality of gate lines that are arranged on this second substrate, one is arranged on the insulation course on this second substrate and a plurality of gate line, a plurality of data lines that are arranged on this insulation course, one is arranged on passivation layer and a plurality of pixel electrode and the common electrode that is arranged on this passivation layer on this insulation course and a plurality of data line, wherein, these a plurality of common electrodes are overlapping in the projection on second substrate and this a plurality of data lines projection on second substrate.

Compared with prior art, liquid crystal indicator of the present utility model has following advantage: because of a plurality of data lines and the projection of common electrode on second substrate overlapping, therefore the bias light that comes from second substrate is only covered by data line or data line and partial common electrode, be that the shading area diminishes, aperture opening ratio is improved, more bias lights are by the first substrate outgoing, and the picture display quality is promoted.

[description of drawings]

Fig. 1 is the diagrammatic cross-section of prior art liquid crystal indicator.

Fig. 2 is the diagrammatic cross-section of the utility model liquid crystal indicator.

[embodiment]

Fig. 2 is the diagrammatic cross-section of the utility model liquid crystal indicator, with the penetration liquid crystal display device is example, this liquid crystal indicator 100 comprises that transparent first substrate 111 and second substrate, 114, one liquid crystal layers 116 that are oppositely arranged are located between this second substrate 114 and first substrate 111.

Be provided with a plurality of gate lines 130 and an insulation course 120 on this second substrate 114 successively; A plurality of data lines 117 are arranged on this insulation course 120; One passivation layer 118 is arranged on this insulation course 120 and a plurality of data line 117 in order to these a plurality of data lines 117 are carried out insulation protection; A plurality of pixel electrodes 127 and common electrode 115 are arranged on this passivation layer 118; One second both alignment layers 119 is arranged on this passivation layer 118, pixel electrode 127 and the common electrode 115 and is close to liquid crystal layer 116 so that the same pretilt angle that liquid crystal layer 116 produces with respect to second substrate 114.These a plurality of common electrodes 115 are parallel being interspersed to produce transverse electric field 125 with pixel electrode 127; These a plurality of common electrodes 115 are overlapping in projection on second substrate 114 and the projection section of these a plurality of data lines 117 on second substrate 114, and promptly these a plurality of common electrodes 115 fall within this a plurality of data lines 117 drop shadow spread on second substrate 114 in the projection section on second substrate 114.

One side of the contiguous liquid crystal layer 116 of this first substrate 111 is provided with a color filter layers 112 and one first both alignment layers 113 successively.

These a plurality of common electrodes 115, pixel electrode 127 are to adopt to make such as metal materials such as gold, silver, copper, can be provided with conducting film (figure does not show) on it, this conducting film can be used tin indium oxide (Indium Tin Oxide, ITO) or indium zinc oxide (Indium Zinc Oxide, one of IZO) make, also can adopt both combinations to make.These a plurality of common electrodes 115, pixel electrode 127 also can adopt such as conductive materials such as tin indium oxides and make.These a plurality of common electrodes 115 and pixel electrode 127 pairings are provided with, and are strip electrode.

Compared with prior art, liquid crystal indicator 100 of the present utility model has following advantage: a plurality of common electrodes 115 are overlapping in projection on second substrate 114 and the projection section of a plurality of data line 117 on second substrate 114, therefore the bias light that comes from second substrate 114 is only covered with partial common electrode 115 by these a plurality of data lines 117, be that the shading area reduces, aperture opening ratio is improved, more bias lights are by 111 outgoing of first substrate, and the picture display quality is promoted.

Aforesaid liquid crystal indicator 100 is an example with penetration transverse electric field liquid crystal indicator only, and the utility model also is applicable to other type liquid crystal indicator, as reflective or semi-penetrating semi-reflecting type liquid crystal displaying device etc.

In addition, a plurality of common electrodes 115 that the utility model liquid crystal indicator 100 adopts and the shape of pixel electrode 127 are not limited to strip electrode, and both all can be arranged to the electrode shape of serrate electrode, serpentine electrode or other bending.

Moreover a plurality of common electrodes 115 that the utility model liquid crystal indicator 100 adopts also can fall within this a plurality of data lines 117 drop shadow spread on second substrate 114 fully in the projection on second substrate 114.Like this, the bias light that comes from second substrate 114 is only covered by data line 117, and promptly the shading area further diminishes, and aperture opening ratio further improves, and more bias lights are by the first substrate outgoing, and the picture display quality is able to further lifting.

Claims

1. liquid crystal indicator, it comprises that first substrate that is oppositely arranged and second substrate, are located at that the liquid crystal layer between this two substrates, a plurality of gate line, that is arranged on this second substrate are arranged on the insulation course on this second substrate and a plurality of gate line, a plurality of data line, that is arranged on this insulation course is arranged on passivation layer and a plurality of pixel electrode and common electrode that is arranged on this passivation layer on this insulation course and a plurality of data line, and it is characterized in that: these a plurality of common electrodes are overlapping in the projection on second substrate and this a plurality of data lines projection on second substrate.

2. liquid crystal indicator as claimed in claim 1 is characterized in that: these a plurality of common electrodes fall within this a plurality of data lines drop shadow spread on second substrate in the projection section on second substrate.

3. liquid crystal indicator as claimed in claim 1 is characterized in that: these a plurality of common electrodes are provided with conducting film.

4. liquid crystal indicator as claimed in claim 2 is characterized in that: this conducting membrane material is tin indium oxide and indium zinc oxide one of them or boths' combination.

5. as each described liquid crystal indicator in the claim 1 to 4, it is characterized in that: these a plurality of pixel electrodes and common electrode are strip electrode.

6. as each described liquid crystal indicator in the claim 1 to 4, it is characterized in that: these a plurality of pixel electrodes and common electrode are the serrate electrode.

7. as each described liquid crystal indicator in the claim 1 to 4, it is characterized in that: these a plurality of pixel electrodes and common electrode are the serpentine electrode.

8. as each described liquid crystal indicator in the claim 1 to 4, it is characterized in that: this common electrode is made by metal material.

9. as each described liquid crystal indicator in the claim 1 to 4, it is characterized in that: this liquid crystal indicator is a reflective LCD device.

10. as each described liquid crystal indicator in the claim 1 to 4, it is characterized in that: this liquid crystal indicator is a penetration liquid crystal display device.