CN201000518Y

CN201000518Y - LCD device capable of reducing signal delay of repair line

Info

Publication number: CN201000518Y
Application number: CNU2006200482645U
Authority: CN
Inventors: 高孝裕
Original assignee: SVA Group Co Ltd
Current assignee: SVA Group Co Ltd
Priority date: 2006-11-29
Filing date: 2006-11-29
Publication date: 2008-01-02
Anticipated expiration: 2016-11-29

Abstract

The utility model discloses a liquid crystal display device which can decrease the signal delay of the repairing line and comprises a base plate. The base plate comprises a plurality of gate lines and a plurality of data lines, and the gate lines and the data lines are across to form an elemental area display area; a plurality of repairing lines are arranged around the base plate in an encircling way, and the repairing lines at the upper side the base plate are connected with the input terminals of the data lines; the repairing lines at the lower side the base plate are connected with the end parts of the data lines through an additive auxiliary repairing line. The stray capacitance C forming caused by intersection of each linear type repairing line at the lower side of the base plate and the data lines is avoided, the RC delay on the repairing line is effectively reduced, and the repairing efficiency is improved.

Description

Can reduce the liquid crystal indicator of repairing line signal delay

Technical field

The utility model relates to a kind of liquid crystal indicator, particularly relates to a kind of liquid crystal indicator of repairing line signal delay that reduces.

Background technology

LCD (liquid crystal display, LCD) be a kind of flat-panel screens that is widely used most at present, have low-power consumption, external form is thin, in light weight and feature such as low driving voltage, its displaying principle is to utilize the material behavior of liquid crystal molecule, the ordered state of liquid crystal molecule is changed, make liquid crystal material produce various photoelectric effect.Generally speaking, LCD includes array infrabasal plate, color film upper substrate and is filled in liquid crystal layer between the upper and lower base plate; The viewing area of LCD comprises a plurality of subpixel area, each subpixel area is generally two gate line (gate line, claim sweep trace again) intersect formed rectangle or other shape area with two data lines (data line), be provided with thin film transistor (TFT) (TFT) and pixel electrode in it, thin film transistor (TFT) serves as on-off element, ON state and the OFF state of control TFT.

Gate line and data line mainly are to be used to provide vision signal to drive pixel electrode, but during owing to making, influences such as the height fluctuating of substrate surface, film forming, etch process, gate line and data line are easy to break, and then cause the phenomenon of open defect to take place.When part was opened circuit in the data line existence, the pixel with the latter half circuit control of opening circuit just can not be normally luminous, makes liquid crystal indicator become bad product, reduces the product yield.Therefore, for avoiding the production of LCD panel, need repair disconnection defect owing to the yield that disconnection defect causes descends.But Chinese patent CN1527268A discloses a kind of liquid crystal indicator of repair data line disconnection defect, as shown in Figure 1 its repair wire loop be around in crystal liquid substrate 10 around, gate line 12 and terminal 14 thereof are set on the crystal liquid substrate 10, data line 16 and terminal 18 thereof, the viewing area 20 that pixel 22 is formed, repair with

boost line

24A, 24B, 24C, every boost line is all crossed over and around data line 16 two ends.When broken string takes place at opening A place in data line 16A, can utilize laser technology, the point of crossing generation of one of data line 16A and boost line (such as 24A) is electrically connected, and the shortest path that foundation is selected cuts off boost line 24A at point of contact 28a, 28b, like this, the signal that is sent to data line 16A Lower Half bvb branch can be provided by boost line 24A, thereby has repaired disconnection defect.

In addition, also have boost line to carry out the cabling distribution, so that disconnection defect is repaired by PWB plate (printed-wiring board (PWB)).Usually, when the repair data line opens circuit, at the downside of panel, linear pattern repair line and data line overlap into mutually latticed, as shown in Figure 2.Adopt the weak point of this repair structure to be, when every linear pattern reparation line 26 intersects with data line 16, will form stray capacitance 29 between them, thereby cause the RC delay (signal delay) that repairs line.Along with the increase of panel size and the raising of resolution, the RC value of repairing on the line becomes increasing, and therefore the RC delay that repairs on the line will be more and more serious, and then cause the sluggishness of signal, thus the effect that influence is repaired, even do not reach the purpose of reparation fully.

Summary of the invention

The purpose of this utility model is that a kind of liquid crystal indicator of repairing line signal delay, improving repairing effect that reduces will be provided.

The utility model provides a kind of liquid crystal indicator of repairing line signal delay that reduces, and comprises a substrate; This substrate comprises: many gate lines and many data lines, the pixel display area territory that gate line and data line intersect to form; Repair lines for many, around be arranged on substrate around, the reparation line of substrate upside is connected with the input terminal of data line; The reparation line of wherein said substrate downside is connected with the terminal part of data line by the additional auxiliary line of repairing.

The described additional auxiliary line of repairing can be " inverted U ", "  type " or "  type " structure.

Based on above-mentioned design, the liquid crystal indicator of repairing line signal delay that reduces of the present utility model, because by additional auxiliary reparation line the linear pattern of substrate downside being repaired line is connected with data line, thereby avoided every linear pattern to repair that line intersects with data line and formation stray capacitance C, therefore effectively reduce the RC delay that repairs on the line, improved remediation efficiency.

In order further to understand feature of the present utility model and technology contents, see also following about detailed description of the present utility model and accompanying drawing.Yet accompanying drawing is only for reference and aid illustration usefulness, does not constitute restriction of the present utility model.

Description of drawings

Fig. 1 is the top view of traditional data line disconnection defect repair structure;

Fig. 2 is the synoptic diagram that traditional repair wire structure and data line intersect;

Fig. 3 is the synoptic diagram of inverted U structure repair line among the utility model embodiment;

Fig. 4 is the one-piece construction synoptic diagram of the liquid crystal indicator of the utility model embodiment;

The connection diagram that the substrate upside was repaired line when Fig. 5 was data line generation broken string;

The connection diagram that the substrate downside was repaired line when Fig. 6 was data line generation broken string.

Description of symbols among the figure:

10, substrate 12. gate lines 14. terminals 16. data lines

16A. data line 18. terminals 20. viewing areas 22. pixels

24A, 24B, 24C. boost line 26a, 26b. point of crossing

28a, 28b. point of contact 29. stray capacitances

30. substrate 31. gate lines 32. data lines 321. input terminals

322. terminal part 32a. data line 33. viewing areas

34. repair the reparation line of the reparation line 34b. substrate downside of line 34a. substrate upside

34c. repair the line 35. additional auxiliary additional auxiliary lines of repairing of line 35a. of repairing

36. source electrode PWB 37,38. grid PWB 39a.39b, 39c. point of crossing

40a, 40b, 40c. point of contact

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing and exemplary embodiments.

Fig. 3 is the additional auxiliary synoptic diagram of repairing line of inverted U among the utility model embodiment; Fig. 4 is the one-piece construction synoptic diagram of the liquid crystal indicator of the utility model embodiment; The connection diagram that the substrate upside was repaired line when Fig. 5 was data line generation broken string; The connection diagram that the substrate downside was repaired line when Fig. 6 was data line generation broken string.

With reference to Fig. 3, Fig. 4, can reduce the liquid crystal indicator of repairing line signal delay, comprise a substrate 30; This substrate 30 comprises: many gate lines 31 and many data lines 32, gate line 31 is formed on the first metal layer (not illustrating among the figure), data line 32 is formed on second metal level and (does not illustrate among the figure), the pixel display area territory 33 that gate line 31 and data line 32 intersect to form, the periphery of viewing area 33 are coated with envelope frame glue (not illustrating among the figure); Repair line 34 for many, repairing line with eight is example, repair line 34 and can be divided into two groups, the reparation line 34a of substrate 30 upsides is connected with the input terminal 321 of data line 32 through the peripheral circuit on the source electrode PWB36, from left and right sides both direction pass through respectively on the grid PWB37 and 38 peripheral circuit around cabling be distributed in substrate 30 around; The reparation line 34b of substrate 30 downsides is connected with the terminal part 322 of data line 32 by the additional auxiliary line 35 of repairing, and the additional auxiliary line 35 of repairing can be " inverted U ", "  type " or "  type " structure.

The reparation line 34b of substrate 30 downsides and the additional auxiliary line 35 of repairing can also distribute cabling outside envelope frame glue zone, this zone is not owing to there is liquid crystal to exist, can reduce the capacitor C of repairing between line 34b and another substrate common electrode, thereby reduce the RC Delay that repairs line.

Repairing line 34b can also be made up of the first metal layer and second metal level, and this parallel-connection structure can reduce the resistance of repairing on the line 34b, thereby reduces the RC Delay that repairs on the line.

With reference to Fig. 4, Fig. 5, Fig. 6, when broken string takes place in data line 32a, for the reparation line 34c of substrate 30 upsides, the point of crossing 39a that repairs line 34c and data line 32a is carried out welding by laser radiation, and cut off reparation line 34c at the 40a place, point of contact on 39a right side, point of crossing; For the reparation line 34c of substrate 30 downsides, carry out welding with repairing the point of crossing 39b of line 34c by laser radiation, and the point of contact 40b on 39b right side, point of crossing cuts off reparation line 34c with data line 32a to be repaired; To repair line 34c simultaneously and carry out welding by laser radiation, and repair line 34c in the cut-out of the 40c place, point of contact on 39c right side, point of crossing with the additional auxiliary point of crossing 39c that repairs line 35a.

Therefore, after the data line driver element sent signal, data-signal was by repairing line 34c, via the peripheral circuit on source electrode PWB36 and the grid PWB37, through the additional auxiliary line 35a that repairs, last signal arrives the data line 32a of broken string again, and signal can distortion, reaches repairing effect.

For the utility model effect better is described, at repairing structure and the of the prior art repair wire structure of line in the utility model, provide example calculations below:

Table 1: technology and design parameter value

Grid is repaired line the first metal layer thickness	0.2	μm
Grid is repaired line the first metal layer thickness	0.2	μm	Grid is repaired line width	30	μm
Second metal layer thickness	0.2	μm	Grid is repaired line width	30	μm
Second metal layer thickness	0.2	μm	The data repair line width	30	μm
Metal1 metallic resistance rate	8	μΩ ^*cm	The data repair line width	30	μm
Metal1 metallic resistance rate	8	μΩ ^*cm	Metal2 metallic resistance rate	20	μΩ ^*cm
G-SiNx thickness	0.2	μm	Metal2 metallic resistance rate	20	μΩ ^*cm
G-SiNx thickness	0.2	μm	PA-SiNx thickness	0.2	μm

The G-SiNx specific inductive capacity	7.5	μm
The G-SiNx specific inductive capacity	7.5	μm	The PA-SiNx specific inductive capacity	7.0	-
Liquid crystal cell is thick	4	μm	The PA-SiNx specific inductive capacity	7.0	-
Liquid crystal cell is thick	4	μm	The liquid crystal specific inductive capacity	8	-
Single Block repairs line length	90000	μm	The liquid crystal specific inductive capacity	8	-

Table 2: comparison sheet as a result

	The utility model is repaired line	The existing line of repairing
	The utility model is repaired line	The existing line of repairing	R	4.89KΩ	6.6KΩ
C	304pF	501pF	R	4.89KΩ	6.6KΩ
C	304pF	501pF	Time delay	1.49μS	3.30μS

By above example as can be known, signal delay on the reparation line of the present utility model reduces by 54.86% than the existing line of repairing, and along with the increase of liquid crystal panel, repairs the increase of line length, and signal delay reduces effect can be more obvious.

Claims

1. one kind can be reduced the liquid crystal indicator of repairing line signal delay, comprises

One substrate; This substrate comprises

Many gate lines and many data lines, the pixel display area territory that gate line and data line intersect to form;

Repair lines for many, around be arranged on substrate around, the reparation line of substrate upside is connected with the input terminal of data line;

The reparation line that it is characterized in that described substrate downside is connected with the terminal part of data line by the additional auxiliary line of repairing.

2. liquid crystal indicator according to claim 1 is characterized in that described additional auxiliary reparation line is " inverted U ", "  type " or "  type ".

3. liquid crystal indicator according to claim 1 is characterized in that the reparation line of described substrate upside, left and right sides carries out the cabling distribution through the peripheral circuit on upside source electrode PWB, left side grid PWB, the right side grid PWB respectively.

4. liquid crystal indicator according to claim 1 is characterized in that being coated with envelope frame glue in the periphery in described pixel display area territory, and the linear pattern of described substrate downside repairs line and the additional auxiliary line cabling of repairing is distributed in outside the envelope frame glue zone.

5. liquid crystal indicator according to claim 1 is characterized in that described gate line is formed on the first metal layer, and the reparation line of described substrate upside and the additional auxiliary line of repairing are made of the first metal layer.

6. liquid crystal indicator according to claim 1 is characterized in that described gate line is formed on the first metal layer, and data line is formed on second metal level, and the linear pattern of described substrate downside is repaired line and is made up of the first metal layer and second metal level.