CN103676246A

CN103676246A - Method for repairing defect of liquid crystal display panel lines

Info

Publication number: CN103676246A
Application number: CN201310733186.7A
Authority: CN
Inventors: 李尊懋
Original assignee: Nanjing CEC Panda LCD Technology Co Ltd
Current assignee: Nanjing CEC Panda LCD Technology Co Ltd
Priority date: 2013-12-27
Filing date: 2013-12-27
Publication date: 2014-03-26
Anticipated expiration: 2033-12-27
Also published as: CN103676246B

Abstract

The invention discloses a method for repairing a defect of liquid crystal display panel lines. The method mainly comprises the steps that repairing lines are connected with a COF through a zero-ohm resistor, and the repairing lines are selected to repair broken lines according to the number and the position of broken lines. Improvement is carried out on the connecting mode of the repairing lines and a COF input port on a PCB, and therefore a liquid crystal panel cannot be repaired originally is repaired, not many repairing lines needs to be arranged, the repairing lines is fully utilized, the repairing efficiency of the liquid crystal panel is effectively improved, and meanwhile the rejection rate of the liquid crystal panel is effectively reduced.

Description

A kind of liquid crystal panel line defect restorative procedure

Technical field

The invention belongs to liquid crystal panel detection field, particularly a kind of liquid crystal panel line defect restorative procedure.

Background technology

Thin Film Transistor-LCD (hereafter TFT-LCD) belongs to a kind of of flat-panel screens, its display quality and resolution are closely related, resolution represents can be used as in territory, effective display area the number of the luminous point of picture disply, each effective luminous point is called pixel (pixel), resolution generally shows with multiplication form, as the resolution of 1366*768, wherein 1366 is pixel counts that territory, effective display area horizontal direction shows, 768 represent the pixel count that vertical direction shows.Each pixel is divided into again tri-pixels (Subpixel) of RGB, and generally, tri-pixels of RGB are horizontal.Liquid crystal display with 1366*768 resolution, have in the horizontal direction 1366*3=4098 time pixel, in horizontal direction, each pixel come for its charging by a data lines, therefore the in the situation that of 1366*768 resolution, have 4098 data lines, and the in the situation that of high-res more, the quantity of data line can be more, as under 4k2k (resolution 3840*2160), data line can reach 3840*3=11520 root.If consider again and solve undercharge problem, make Double source(Double Data line), data line can double, and with the situation of 4k2k, 3840*3*2=23040 root.

Each data lines has the possibility of broken string, if a data lines is therefrom separated, it is undesired below breakpoint, to show, this situation is called line defect.In order to solve such situation, generally repair line can be set in panel.To repair the panel that has line defect.When have that line defect produces time, with radium-shine, the two ends up and down of this data line have been connected to reparation with the two ends of repair line respectively.

At present repair line adopt mode be mainly at a COF(COF for covering brilliant film, the next middle abbreviations COF) both sides connect two repair lines, when there are two broken strings in the region of working as like this this COF control, can repair by these two repair lines.Recoverable maximum number is 2 times of S-COF number so in theory, but considers the design of array base palte in face, and the quantity of the repair line in face can be restricted, and the quantity that this restriction can make the repair line on PCB is much smaller than 2 times of COF quantity.

At present the panel of increasing high-res emerges, and required COF quantity is more, and due to the restriction in face, the quantity of repair line can not be too many, and when the quantity of repair line is fewer than COF, current repair line connection there will be the problem that remediation efficiency is not high.Because repair line quantity is fewer than COF, will inevitably occur that different COF receives in repair line identical on pcb board, two broken strings of appearance in region corresponding to COF so, after repairing by repair line, when sharing region that the COF of repair line controls and occur breaking again with its, cannot repair.Even if now also have reserved repair line on pcb board, thereby also cannot realize because of the restriction of connection repairing, cause liquid crystal panel not re-use.What existing repair line adopted with the connected mode of COF is being connected of fixing, when COF quantity is more than the quantity of repair line, and the problem that can cause some repair line not make full use of.

summary of the invention

Goal of the invention: the object of the invention is to for the deficiencies in the prior art, a kind of rate of effectively reducing the number of rejects and seconds is provided, improve the restorative procedure of the liquid crystal panel of remediation efficiency.

Technical scheme: in order to reach foregoing invention object, the invention provides a kind of liquid crystal panel line defect restorative procedure, comprise the following steps:

Step 1: many repair lines are set on the pcb board in liquid crystal display, pcb board is connected with liquid crystal panel by a plurality of COF, wherein two input ports in each COF are connected with any two repair lines respectively, if there is the input port in two or more COF to share a reparation repair line, retain an input port in COF and be directly connected with repair line, the input port in other COF is connected with repair line by zero Europe resistance; And in every repair line the reserved connection jaws being connected with COF input port;

Step 2: the data line in liquid crystal panel is detected, detect quantity and the position of broken data wire;

Step 3: the quantity of the testing result in step 2 and repair line is compared, if the quantity of broken data wire is greater than the quantity of repair line in liquid crystal panel, liquid crystal panel can not be repaired; When if in liquid crystal panel, the quantity of broken data wire is not more than the quantity of repair line, the input end of the data line that needs are repaired with the output port of corresponding COF by radium-shine electrical connection;

Step 4: if there is the input port of two or more COF to use same repair line, the input port that retains one of them COF is connected with reparation, after the input port of another or a plurality of COF and the zero Europe resistance between former repair line are disconnected, then be connected in idle repair line by zero Europe resistance;

Step 5: thus the output terminal of the data line that needs are repaired is electrically connected to formation reparation loop with corresponding repair line.

Two input ports in described step 1 in each COF are all connected with repair line by zero Europe resistance, can make like this input port of COF be connected with any repair line flexibly, thereby make the reparation of liquid crystal panel more convenient.

Beneficial effect: compared with prior art, the present invention improves the connected mode of repair line and COF input port on pcb board, thereby the liquid crystal panel of script unrepairable is repaired, do not need to arrange too much repair line simultaneously, repair line can be utilized fully, the remediation efficiency of liquid crystal panel is effectively improved, effectively reduces the rejection rate of liquid crystal panel simultaneously.

Accompanying drawing explanation

Fig. 1 is the electrical block diagram of embodiments of the invention 1;

Fig. 2 is the connection diagram of two input ends and repair line in COF4 before repairing in embodiment 1;

Fig. 3 is the connection diagram of two input ends and repair line in COF4 after repairing in embodiment 1.

Embodiment

Below technical solution of the present invention is elaborated, but protection scope of the present invention is not limited to described embodiment.

Embodiment 1:

The first defect-restoration method therefor of a kind of liquid crystal panel provided by the invention, comprises the following steps:

Step 1: 6 repair lines are set on pcb board, and as shown in Figure 1,6 repair lines are equally divided into two groups, and every group is 3 repair lines, one group, the left side, one group, the right, two groups of structures are identical.One group of the left side of take is example, and three repair lines that the definition left side is a group are respectively R1, R2, R3.Pcb board is by being connected with liquid crystal panel with 12 COF, 12 COF are also divided into two groups of left and right, every group of 6 COF, two input ports in each COF are connected with any two repair lines respectively by zero Europe resistance, and in every repair line the connection jaws of reserved and COF input port.

In the present embodiment, in every group, only have three repair lines, but there are 6 COF, so it is identical with the connected mode of repair line to have two COF, wherein, two input ports of COF1 and COF4 are connected with repair line R3 with repair line R2 respectively, and two input ports of COF2 and COF5 are connected with repair line R2 with repair line R1 respectively, and two input ports of COF3 and COF6 are connected with repair line R3 with repair line R1 respectively.Meanwhile, on repair line R1, leave the connector with COF1 and COF4, on repair line R2, leave the connector with COF3 and COF6, on repair line R3, leave the connector with COF2 and COF5.

Step 2: with detector, the data line in liquid crystal panel is detected, detect quantity and the position of broken data wire;

Step 3: the quantity of the testing result in step 2 and repair line is compared, if the quantity of broken data wire is greater than 3 in liquid crystal panel, liquid crystal panel can not be repaired; If the quantity of broken data wire is not more than at 3 o'clock in liquid crystal panel, the input end of the data line that needs are repaired is electrically connected to the output port of corresponding COF;

In the present embodiment, find that there is after testing three data lines broken strings, be the data lines broken string that two data lines controlled of COF1 and COF4 control, can the input end of the data line of broken string be electrically connected to corresponding COF1 and the output terminal of COF4 by radium-shine method.

Step 4: the service condition that checks repair line, if there is the input port of two or more COF to use same repair line, the input port that retains one of them COF is connected with reparation, after the zero Europe resistance that the input port of another or a plurality of COF is connected with former repair line disconnects, then be connected in idle repair line by zero Europe resistance; Because two input ports of COF1 are connected with repair line R2 with repair line R3 respectively, as shown in Figure 2, according to initial default repair line, the broken string in COF4 control area is also to be repaired by repair line R2, so repair line R2 is repeated to utilize, can not repair broken string.As shown in Figure 3, now the zero Europe resistance being connected with repair line R2 with the corresponding input port of controlling broken string in COF4 wherein can be taken out, and the corresponding input port that will break with control in COF4 by zero Europe resistance be connected with repair line R1.

Step 5: thus the output terminal of the data line that needs are repaired is electrically connected to formation reparation loop with corresponding repair line.The output terminal of two data lines in the present embodiment COF1 being controlled is electrically connected to repair line R3 and R2 respectively, and the output terminal of that data lines of the broken string that COF4 is controlled is electrically connected to repair line R1, has so just formed reparation loop.

Claims

1. a liquid crystal panel line defect restorative procedure, is characterized in that: comprise the following steps:

2. the first defect-restoration method therefor of liquid crystal panel according to claim 1, is characterized in that: two input ports in described step 1 in each COF are all connected with repair line by zero Europe resistance.