CN100426103C

CN100426103C - Liquid crystal displaying device

Info

Publication number: CN100426103C
Application number: CNB2005100370315A
Authority: CN
Inventors: 陈弘育; 谢朝桦
Original assignee: Innolux Shenzhen Co Ltd; Innolux Display Corp
Current assignee: Innolux Shenzhen Co Ltd; Innolux Corp
Priority date: 2005-09-02
Filing date: 2005-09-02
Publication date: 2008-10-15
Anticipated expiration: 2025-09-02
Also published as: CN1924677A

Abstract

This invention provides one LCD, which comprises relative two baseboards, liquid crystal molecule between the two boards, wherein, one board comprises grating line, data line, pixel electrode and common electrode in the row distribution and the common electrode comprises one opening coupled to the data signal of the pixel electrode for damping.

Description

LCD

[technical field]

The invention relates to a kind of LCD.

[background technology]

Please refer to Fig. 1, be a kind of prior art LCD be electrically connected synoptic diagram.This LCD 200 comprises two opposing substrates 1 and substrate 2, and liquid crystal molecule (figure does not show) is between this substrate 1 and substrate 2.Comprise gate line 6, data line 5, pixel electrode 3 and public electrode 4 on this substrate 1.This public electrode 4 is a tin indium oxide (IndiumTin Oxide, ITO) transparency electrodes.Under the energising situation, form a plurality of capacitor C 1 thereby have dielectric medium between this data line 5 and this public electrode 4, have dielectric medium between this public electrode 4 and this pixel electrode 3 and form a plurality of capacitor C 2.

Please together referring to figs. 2 and 3, Fig. 2 is the vertical view of each electrode among Fig. 1.Fig. 3 is the equivalent circuit diagram of Fig. 1.Public electrode 4 is ito transparent electrodes, and its sheet resistance is about the sheet resistance of other metal material electrode more than 500 times, so public electrode 4 can not ignore, so only consider the resistance R 1 of public electrode 4, the resistance of other electrode can be ignored.Data signal source 7 provides data-signal to pass through data line 5 to link to each other with a plurality of capacitor C 1, this capacitor C 1 a plurality of capacitor C 2 that are connected in series respectively, and the other end of this capacitor C 2 links to each other with pixel electrode 3.

Under normal picture demonstration situation, data signal source 7 provides data-signal to data line 5, normal picture should not exist data-signal to be coupled to situation on the pixel electrode 3, but because the existence of capacitor C 1 and capacitor C 2, the data-signal that data signal source 7 offers data line 5 is coupled (Coupling) by capacitor C 1 to public electrode 4 with data-signal, and public electrode 4 is coupled to data-signal on the pixel electrode 3 by capacitor C 2 again.Inevitable data line 5 is coupled to its data-signal on the pixel electrode 3, thereby disturbs display image, causes picture to produce and crosstalks.

[summary of the invention]

Data line is coupled to its data-signal on the pixel electrode in the prior art LCD in order to overcome, thereby disturbs display image, causes picture to produce and crosstalks, and is necessary to provide a kind of LCD that reduces the picture crosstalk phenomenon.

The disclosed technical scheme that solves this technical problem of one better embodiment provides a kind of LCD, it comprises two relative substrates, liquid crystal molecule is between this two substrate, comprise gate line, data line, pixel electrode and public electrode on the substrate wherein, this gate line and data line are ranks arranges, and public electrode and pixel electrode are positioned at same one deck, wherein, this public electrode comprises an opening, and whole opening is between this data line and this pixel electrode.

The disclosed a kind of LCD of another better embodiment, it comprises: two relative substrates, liquid crystal molecule is between this two substrate, comprise gate line, data line, pixel electrode and public electrode on the substrate wherein, this gate line and data line are ranks arranges, and public electrode and pixel electrode are positioned at different layers, wherein, this public electrode comprises an opening, and whole opening is between this data line and this pixel electrode.

Compared to prior art, above-mentioned LCD is because public electrode has an opening and whole opening between this data line and this pixel electrode, when the data-signal of coupling passes on the neighborhood pixels electrode side public electrode by proximity data line side public electrode, after decaying significantly, be coupled on the pixel electrode, therefore the picture of the data-signal of this coupling generation is crosstalked less to the influence of normal display frame again.

[description of drawings]

Fig. 1 be a kind of prior art LCD be electrically connected synoptic diagram.

Fig. 2 is the vertical view of each electrode among Fig. 1.

Fig. 3 is the equivalent circuit diagram of Fig. 1.

Fig. 4 is that LCD of the present invention is electrically connected synoptic diagram.

Fig. 5 is the vertical view of each electrode among Fig. 4.

Fig. 6 is the equivalent circuit diagram of Fig. 4.

[embodiment]

Please refer to Fig. 4, is that a kind of LCD of better embodiment is electrically connected synoptic diagram.This LCD 100 comprises two relative second substrate 10 and first substrates 20, and liquid crystal molecule (figure does not show) is between this second substrate 10 and first substrate 20.Comprise gate line 60, data line 50, pixel electrode 30 and public electrode 40 on this second substrate 10.This gate line 60 and data line 50 are linescan method and arrange, pixel electrode 30 is positioned at the infall (figure does not show) of this gate line 60 and data line 50, public electrode 40 is positioned at same one deck with pixel electrode 30, and this public electrode 40 is ito transparent electrodes, comprises an opening 41 in the middle of it.The position of this opening 41 can be determined opening 41 2 lateral section width sizes according to actual needs.The cross-sectional width of these proximity data line 50 side public electrodes is little than the cross-sectional width of neighborhood pixels electrode 30 side public electrodes, and then the neighbour nearly pixel electrode 30 side public electrode resistance of these proximity data line 50 side public electrodes are big.Form capacitor C 7 between this data line 50 and the public electrode adjacent thereto 40, form capacitor C 6 between the public electrode 40 of these opening 41 both sides, form capacitor C 5 between this pixel electrode 30 and the public electrode adjacent thereto 40.

Please together with reference to figure 5 and Fig. 6, Fig. 5 is the vertical view of each electrode among Fig. 4.Fig. 6 is the equivalent circuit diagram of Fig. 4.Public electrode 40 is ito transparent electrodes, and its sheet resistance is about the sheet resistance of other metal material electrode more than 500 times, so public electrode 40 can not ignore, so only consider the resistance R 3 and the resistance R 5 of public electrode 40, the resistance of other electrode can be ignored.When the high frequency state, proximity data line 50 side public electrodes have a plurality of resistance R 3, and neighborhood pixels electrode 30 side public electrodes have a plurality of resistance R 5.A plurality of capacitor C 7 link to each other with data signal source 70 respectively, and this capacitor C 7 is connected in series with a plurality of capacitor C 6 and C5 respectively successively, and the other end of this capacitor C 5 links to each other with pixel electrode 30.The two ends of resistance R 3 are between adjacent two column capacitance C7 and capacitor C 6.The two ends of resistance R 5 are between adjacent two column capacitance C5 and capacitor C 6.The data-signal that data signal source 70 provides transmits by data line 50 and by capacitor C 7 data-signal is coupled on the proximity data line 50 side public electrodes, proximity data line 50 side public electrodes are coupled to data-signal on the neighborhood pixels electrode 30 side public electrodes by capacitor C 6 again, and neighborhood pixels electrode 30 side public electrodes are coupled to data-signal on the pixel electrode 30 by capacitor C 5 again.

Because the existence of resistance R 3, resistance R 5 and capacitor C 6; the data-signal of coupling when passing on the neighborhood pixels electrode 30 side public electrodes by proximity data line 50 side public electrodes through significantly decay; therefore when the data-signal of overdamping was coupled on the pixel electrode 30 again, the display frame crosstalk phenomenon that this coupled signal produces was less to the influence that shows normal pictures.

The present invention also has other change form, and for example public electrode and pixel electrode are positioned at the different layers of same substrate, and pixel electrode can be positioned at the below of public electrode.

Claims

1. LCD, it comprises: two relative substrates, liquid crystal molecule is between this two substrate, comprise gate line, data line, pixel electrode and public electrode on the substrate wherein, this gate line and data line are ranks and arrange, public electrode and pixel electrode are positioned at same one deck, it is characterized in that: this public electrode comprises an opening, and whole opening is between this data line and this pixel electrode.

2. LCD as claimed in claim 1 is characterized in that: this public electrode is a transparency electrode.

3. LCD as claimed in claim 2 is characterized in that: the public electrode cross-sectional width between this public electrode opening and the data line is littler than the public electrode cross-sectional width between this public electrode opening and the pixel electrode.

4. LCD as claimed in claim 3 is characterized in that: the public electrode cross section resistance between this public electrode opening of the public electrode resistance ratio between this public electrode opening and the data line and the pixel electrode is big.

5. LCD, it comprises: two relative substrates, liquid crystal molecule is between this two substrate, comprise gate line, data line, pixel electrode and public electrode on the substrate wherein, this gate line and data line are ranks and arrange, public electrode and pixel electrode are positioned at different layers, are characterised in that: this public electrode comprises an opening, and whole opening is between this data line and this pixel electrode.

6. LCD as claimed in claim 5 is characterized in that: this public electrode is a transparency electrode.

7. LCD as claimed in claim 6 is characterized in that: the public electrode cross-sectional width between this public electrode opening and the data line is littler than the public electrode cross-sectional width between this public electrode opening and the pixel electrode.

8. LCD as claimed in claim 7 is characterized in that: the public electrode cross section resistance between this public electrode opening of the public electrode resistance ratio between this public electrode opening and the data line and the pixel electrode is big.