CN2757172Y

CN2757172Y - Liquid crystal display device

Info

Publication number: CN2757172Y
Application number: CN 200420095296
Authority: CN
Inventors: 陈鹊如; 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: 2004-11-13
Filing date: 2004-11-13
Publication date: 2006-02-08
Anticipated expiration: 2014-11-13

Abstract

The utility model relates to a liquid crystal display which comprises a first substrate, a second substrate, a liquid crystal layer, at least a direction matching layer, a common electrode, insulating layers, a pixel electrode and passivating layers, wherein the first substrate and the second substrate are oppositely arranged; the liquid crystal layer is arranged between the first substrate and the second substrate; the direction matching layers are arranged between the first substrate and the second substrate; the common electrode is arranged on the second substrate; the insulating layers are respectively arranged on the second substrate and the side part of the common electrode; the pixel electrode is arranged on the insulating layer; the passivating layers are respectively arranged on the insulating layer and the side part of the pixel electrode. The common electrode and the pixel electrode are mutually arranged at intervals, and the separation distance between the common electrode and the liquid crystal layer is equal to that between the pixel electrode and the liquid crystal layer.

Description

LCD

[technical field]

The utility model relates to a kind of LCD, relates in particular to a kind of LCD.

[background technology]

Itself does not have the characteristics of luminescence liquid crystal in the LCD, is to adopt the electric field controls liquid crystal molecule to reverse and realize passing through or not passing through of light, thereby reaches the purpose of demonstration.In conventional liquid crystal, form electrode on the surface of two substrate of glass, to form the electric field that the control liquid crystal molecule reverses, this electrode uses transparent material, and the electrode of two substrates is oppositely arranged, thereby forms and the perpendicular electric field of substrate surface.Because liquid crystal molecule has dielectric anisotropy and electricity is led anisotropy, therefore under the control of this electric field, liquid crystal molecular orientation will be perpendicular to substrate surface, but because the influence of physical force such as interaction force between liquid crystal molecule and gravity, make that the orientation of liquid crystal molecule can not be fully perpendicular to substrate surface, thereby will have influence on the display effect of LCD.

A kind of prior art LCD as depicted in figs. 1 and 2, this LCD 1 comprises first substrate 11 and second substrate 12 that is oppositely arranged, one liquid crystal layer 17 between this first substrate 11 and second substrate 12, two lay respectively at this first substrate 11 and second substrate 12 and the different side of liquid crystal layer and the orthogonal polarizing appliance 110 of polarizing axis (Polarizing Axis) and 120, one is arranged on the insulation course 14 of second substrate, 12 contiguous liquid crystal layer one sides, be arranged on the common electrode 15 of 14 of second substrate 12 and insulation courses, one is arranged on the passivation layer 100 of insulation course 14 contiguous liquid crystal layer 17 1 sides, be arranged on the signal wire 13 and the pixel electrode 16 of 100 of insulation course 14 and passivation layers, one is arranged on the both alignment layers 102 of passivation layer 100 contiguous liquid crystal layer 17 1 sides, one is arranged on the colored filter 19 of substrate 11 contiguous liquid crystal layer 17 1 sides, one is arranged on the colored filter 19 and the both alignment layers 101 adjacent with liquid crystal layer 17, wherein, this common electrode 15 and pixel electrode 16 spaces are provided with, this both

alignment layers

101 and 102 is used to control the initial orientation of liquid crystal molecule 170, and this both alignment layers 101 is identical with the polarizing axis direction of polarizing appliance 120 with 102 orientation, have at least a substrate to adopt transparent material to make in this first substrate 11 and second substrate 12, this liquid crystal layer 17 is by forming to row (Nematic) type liquid crystal, and this LCD 1 realizes colored the demonstration by colored filter 19.

Please consulting Fig. 1 once more, is not during making alive, the synoptic diagram of this LCD 1 duty of living in.Under this state, owing to be not subjected to electric field action, then the orientation of this liquid crystal molecule 170 is identical with the orientation of both

alignment layers

101 and 102, and this both alignment layers 101 is identical with the polarizing axis direction of polarizing appliance 120 with 102 orientation, therefore, the linearly polarized light (figure does not show) that enters liquid crystal layer 17 through polarizing appliance 120 just in time can pass through this liquid crystal layer 17, and polarization state does not change.In addition, because polarizing appliance 110 is vertical mutually with 120 polarizing axis, so this linearly polarized light can not pass through polarizing appliance 110, promptly this LCD 1 is in dark attitude.

Please consult Fig. 2 once more, when being making alive, the synoptic diagram of this LCD 1 duty of living in.This common electrode 15 forms the electric field 18 that is basically parallel to first substrate 11 and second substrate 12 with pixel electrode 16, because of liquid crystal molecule 170 has dielectric anisotropy and electricity is led anisotropy, so under electric field 18 effects, the orientation of this liquid crystal molecule 170 is consistent with the direction of this electric field 18, but, there is certain angle in the polarizing axis direction of the direction of electric field 18 and polarizing appliance 120, then the linearly polarized light (figure does not show) by polarizing appliance 120 will produce birefringence when arriving liquid crystal molecule 170, make this linear polarization polarization state of light change, and polarizing appliance 110 is vertical mutually with 120 polarizing axis, so the part component of this linearly polarized light will be by polarizing appliance 110, promptly this LCD 1 is in bright attitude.

As mentioned above, this employing is parallel to the method that the electric field controls liquid crystal molecule of substrate reverses and is called " in-plane changes method " (In Plane Switching, IPS), should " in-plane changes method " be specifically designed to LCD, and adopt the LCD 1 of this method to have broader angle of visibility than conventional liquid crystal.

But, there are insulation course 14, passivation layer 100 and both alignment layers 102 between this common electrode 15 and the liquid crystal layer 17, and there are passivation layer 100 and both alignment layers 102 between this pixel electrode 16 and the liquid crystal layer 17, this shows, common electrode 15 is different apart from the thickness of liquid crystal layer 17 with pixel electrode 16 apart from the thickness of liquid crystal layer 17, thereby the amount of force of charged corpuscle is different in 16 pairs of liquid crystal layers 17 of this common electrode 15 and pixel electrode.Because liquid crystal layer 17 can adsorb the charged corpuscle impurity in the surrounding environment, and in the driving process, the charged polarity of this common electrode 15 and pixel electrode 16 constantly changes, along with driving time increases, how many charged corpuscles that remains in common electrode 15 and pixel electrode 16 differs, to cause the intensity of the electric field 18 of formation between common electrode 15 and the pixel electrode 16 to weaken, thereby, make the liquid crystal molecule speed and the quantity that under 18 effects of this electric field, twist descend, promptly produce afterimage phenomenon, cause the image display effect of this LCD 1 not good.

In sum, provide the preferable LCD of a kind of image display effect real for necessary.

[utility model content]

Adopt the not good defective of prior art LCD image display effect for overcoming, the utility model provides a kind of image display effect preferable LCD.

The technical scheme that the utility model technical solution problem is adopted is: a kind of LCD is provided, it comprises first substrate and second substrate that is oppositely arranged, one is arranged on the liquid crystal layer between this first substrate and second substrate, at least one both alignment layers that is arranged between this first substrate and second substrate, be arranged on this second suprabasil common electrode, be arranged in this second substrate and the insulation course of common electrode side, be arranged on the pixel electrode on this insulation course, be arranged on this insulation course passivation layer with the pixel electrode side, wherein, this common electrode and pixel electrode space are provided with, and both equate with the spacing of liquid crystal layer.

Compared to prior art, the beneficial effects of the utility model are: this common electrode and pixel electrode equate with the spacing of liquid crystal layer in the utility model LCD, thereby, when having charged corpuscle impurity in the liquid crystal layer, this common electrode is identical to the amount of force of this charged corpuscle with pixel electrode, and, the polarity of this common electrode and pixel electrode changes in time, so, increase along with driving time, this charged corpuscle can not accumulate in this common electrode or pixel electrode one side, can prevent to produce image residue, thereby obtains preferable image display effect.

[description of drawings]

Fig. 1 is the not partial schematic diagram of duty of living in during making alive of a kind of prior art LCD.

The partial schematic diagram of duty of living in when Fig. 2 is a LCD making alive shown in Figure 1.

The partial schematic diagram of duty when Fig. 3 is the utility model LCD first embodiment making alive.

The partial schematic diagram of duty when Fig. 4 is the utility model LCD second embodiment making alive.

The partial schematic diagram of duty when Fig. 5 is the utility model LCD the 3rd embodiment making alive.

[embodiment]

First embodiment of the utility model LCD as shown in Figure 3, this LCD 2 comprises first substrate 21 and second substrate 22 that is oppositely arranged, one is positioned at the liquid crystal layer 27 of 22 of this first substrate 21 and second substrates, two lay respectively at this first substrate 21 and second substrate 22 and liquid crystal layer 27 different sides and the orthogonal polarizing appliance 210 of polarizing axis and 220, be arranged on the common electrode 25 in this second substrate 22, be arranged in this second substrate 22 insulation course 24 with these common electrode 25 sides, be arranged on the pixel electrode 26 on this insulation course 24, be arranged on the insulation course 24 and the passivation layer 200 of these pixel electrode 26 sides, be arranged on the signal wire 23 of 200 of this passivation layers, one is arranged on the both alignment layers 202 of these passivation layer 200 contiguous liquid crystal layer 27 1 sides.

Wherein, this common electrode 25 and pixel electrode 26 spaces are provided with, and both are all near both alignment layers 202, this common electrode 25 and pixel electrode 26 form electric field 28, this both alignment layers 202 is used to control the initial orientation of liquid crystal molecule 270, and the orientation of this both alignment layers 202 is identical with the polarizing axis direction of polarizing appliance 220, have at least a substrate to adopt transparent material to make in this first substrate 21 and second substrate 22, this common electrode 25 adopts ITO (Indium Tin Oxide with pixel electrode 26, tin indium oxide) or the gold, silver, metallic conduction materials such as copper are made, and this liquid crystal layer 27 adopts nematic crystal to make.

As mentioned above, the spacing that this common electrode 25 and pixel electrode 26 and liquid crystal layer are 27 is the thickness of this both alignment layers 202, promptly this common electrode 25 and pixel electrode 26 equate with the spacing of liquid crystal layer 27, therefore, when having charged corpuscle impurity in the liquid crystal layer 27, the amount of force of 26 pairs of these charged corpuscles of this common electrode 25 and pixel electrode is identical, again because the polarity of this common electrode 25 and pixel electrode 26 changes in time, so, increase along with driving time, this charged corpuscle can not accumulate in this common electrode 25 or pixel electrode 26 1 sides, thereby prevents to produce image residue.

Second embodiment of the utility model LCD as shown in Figure 4, this LCD 3 is compared with the described LCD 2 of first embodiment, difference is: this LCD 3 adopts the both alignment layers 301 that is arranged on first substrate, 31 contiguous liquid crystal layer 37 1 sides to replace the both alignment layers 202 of this LCD 2, and in this first substrate 31 and 301 of both alignment layers a colored filter 39 is set, the setting of other element is identical with LCD 2.As mentioned above, the common electrode 35 of this LCD 3 and pixel electrode 36 are all adjacent with liquid crystal layer 37, therefore, when having charged corpuscle impurity in the liquid crystal layer 37, the amount of force of 36 pairs of these charged corpuscles of this common electrode 35 and pixel electrode is identical, again because, this common electrode 35 changes in time with the polarity of pixel electrode 36, so, along with the increase of driving time, this charged corpuscle can not accumulate in this common electrode 35 or pixel electrode 36 1 sides, thereby prevents to produce image residue.In addition, this LCD 3 realizes colored the demonstration by colored filter 39.

The 3rd embodiment of the utility model LCD as shown in Figure 5, this LCD 4 is compared with the described LCD 2 of first embodiment, and difference is: this LCD 4 comprises that further a both alignment layers 401 and that is arranged on contiguous liquid crystal layers 47 1 sides of first substrate 41 is arranged on the colored filter 49 of 401 of this first substrate 41 and both alignment layers.The principle that this LCD 4 prevents to produce image residue is identical with LCD 2, and this LCD 4 can realize colored the demonstration by colored filter 49.

But it is described that the utility model LCD is not limited to above-mentioned embodiment, and for example: above-mentioned substrate can adopt glass or silicon dioxide to make; Above-mentioned common electrode and pixel electrode can parallel or non-parallel settings; Above-mentioned insulation course can adopt insulating material such as monox or silicon nitride to make; Above-mentioned LCD 2 can adopt colored filter to realize colored demonstration etc.

Claims

1. LCD, it comprises that first substrate that is oppositely arranged and second substrate, are arranged on liquid crystal layer between this first substrate and second substrate, at least onely are arranged on both alignment layers between this first substrate and second substrate, are arranged on this second suprabasil common electrode, are arranged in this second substrate and the insulation course of common electrode side, are arranged on pixel electrode on this insulation course, are arranged on this insulation course and the passivation layer of pixel electrode side, it is characterized in that: this common electrode and pixel electrode space are provided with, and both equate with the spacing of liquid crystal layer.

2. LCD as claimed in claim 1 is characterized in that: this both alignment layers is arranged on contiguous liquid crystal layer one side of this first substrate.

3. LCD as claimed in claim 2 is characterized in that: this LCD further comprises a colored filter, and this colored filter is arranged between first substrate and the both alignment layers.

4. LCD as claimed in claim 2 is characterized in that: this LCD further comprises a both alignment layers, and this both alignment layers is arranged on contiguous liquid crystal layer one side of passivation layer.

5. LCD as claimed in claim 1 is characterized in that: this both alignment layers is arranged on contiguous liquid crystal layer one side of passivation layer.

6. LCD as claimed in claim 5 is characterized in that: this LCD further comprises a colored filter, and this colored filter is arranged on contiguous liquid crystal layer one side of this first substrate.

7. LCD as claimed in claim 6 is characterized in that: this LCD further comprises a both alignment layers, and this both alignment layers is arranged on a side of the contiguous liquid crystal layer of this colored filter.

8. LCD as claimed in claim 1 is characterized in that: this common electrode and pixel electrode are arranged in parallel.