CN102509720A

CN102509720A - Repair method for data wires of array substrate of active matrix organic light emitting display

Info

Publication number: CN102509720A
Application number: CN2011104190482A
Authority: CN
Inventors: 张婷婷; 邱勇; 黄秀颀; 高孝裕
Original assignee: Kunshan New Flat Panel Display Technology Center Co Ltd
Current assignee: Kunshan New Flat Panel Display Technology Center Co Ltd
Priority date: 2011-12-15
Filing date: 2011-12-15
Publication date: 2012-06-20
Anticipated expiration: 2031-12-15
Also published as: CN102509720B

Abstract

The invention discloses a repair method for data wires of an array substrate of an active matrix organic light emitting display. A substrate pixel circuit comprises a plurality of scanning wires and data wires which are insulated and crossed. Pixel electrodes are formed in a separation region for the scanning wires and the data wires. Switching thin film transistors, driving thin film transistors and organic light emitting diodes are arranged at the intersections of the scanning wires and the data wires. The anodes of the organic light emitting diodes are connected with the sources of the driving thin film transistors, and the cathodes of the organic light emitting diodes are connected with VSS lines. The data wires are partially overlapped with the pixel electrodes. By the repair method for the data wires of the array substrate of the active matrix organic light emitting display, the driving thin film transistors (TFT) at the positions of broken data wires are disabled, the two ends of each broken data wire are welded together with the pixel electrodes, and the broken data wires are repaired by the pixel electrodes which serve as adapting wires. The yield of the product is increased. The method is easy to operate and implement.

Description

A kind of restorative procedure of active matrix/organic light emitting display array base palte data wire

Technical field

The present invention relates to a kind of array base palte data wire restorative procedure, relate in particular to a kind of restorative procedure of active matrix/organic light emitting display array base palte data wire.

Background technology

Organic light emitting display (OLED) is the active illuminating device.Compare present main flow flat panel display Thin Film Transistor-LCD (TFT-LCD); OLED has high-contrast; Wide viewing angle, low-power consumption, advantage such as volume is thinner; Being expected to become the flat panel display of future generation after LCD, is one of the maximum technology that receives publicity in the present flat panel display.

Prepare in the process at AMOLED; The pixel of AMOLED display bad bad with holding wire broken string be inevitable two types of major defects that occur among the preparation technology; And these two types of defective major parts concentrate on after the array processes end; Above-mentioned when bad when detecting, just need repair accordingly.Broken data wire for occurring after the encapsulation is bad, and prior art does not provide realistic plan.Therefore, be necessary to provide active matrix/organic light emitting display array base palte data wire restorative procedure, improve the product yield, and simple to operate, easy to implement.

Summary of the invention

Technical problem to be solved by this invention provides a kind of active matrix/organic light emitting display array base palte data wire restorative procedure, can break by the repair data line, improves the product yield, and simple to operate, easy to implement.

The present invention solves the problems of the technologies described above the technical scheme that adopts to provide a kind of active matrix/organic light emitting display array base palte data wire restorative procedure; Said substrate pixel circuit comprises scan line and the data wire that many bar insulations intersect; Be formed with pixel electrode in said scan line and the data wire separated region, said scan line and data wire infall are provided with switching thin-film transistor, drive thin film transistors and Organic Light Emitting Diode; Many vdd lines extend along said data wire direction, and the drain electrode of said vdd line and drive thin film transistors links to each other, and link to each other through the grid of storage capacitance and drive thin film transistors; The anode of said Organic Light Emitting Diode links to each other with the source electrode of drive thin film transistors, and its negative electrode links to each other with the VSS line; Said data wire and pixel electrode part overlap; Said method for repairing and mending comprises the steps: a) position of specified data line broken string; B) with the break pixel drive film crystal tube failure of position of data; C), let pixel electrode repair this data broken string as patchcord with data break two ends and this pixel electrode welding.

The restorative procedure of above-mentioned active matrix/organic light emitting display array base palte data wire; Wherein, Said step b) adopts laser cutting method to break off from a side of the display array substrate grid with the drive thin film transistors of said bad pixel point, makes the drive thin film transistors inefficacy of said bad pixel point.

The restorative procedure of above-mentioned active matrix/organic light emitting display array base palte data wire, wherein, said step c) adopts the laser welding method that broken data wire two ends and this pixel electrode are welded together.

The present invention contrasts prior art has following beneficial effect: the restorative procedure of active matrix/organic light emitting display array base palte data wire provided by the invention; Through earlier the break pixel drive TFT of position of data being lost efficacy; Then broken data wire two ends and this pixel electrode are welded together, thereby let pixel electrode repair this data broken string as patchcord.

Description of drawings

Fig. 1 is a kind of dot structure sketch map of active matrix/organic light emitting display;

Fig. 2 is a kind of dot structure equivalent circuit diagram of active matrix/organic light emitting display;

Fig. 3 is the dot structure sketch map of active matrix/organic light emitting display of the present invention;

Fig. 4 is the repairing schematic flow sheet of data broken string of the present invention;

The sketch map of Fig. 5 for broken string position pixel drive TFT was lost efficacy;

Fig. 6 makes the sketch map of data wire reparation for welding pixel electrode of the present invention and data broken string two ends.

Among the figure:

1 data wire, 2 scan lines, 3 storage capacitances

4 vdd lines, 5 switching thin-film transistors, 6 drive thin film transistors

7 pixel electrodes, 9 cut points, 10 first pads

11 second pads.

Embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is done further description.

Fig. 3 is the dot structure sketch map of active matrix/organic light emitting display of the present invention.

See also Fig. 3; The image element circuit of the active matrix/organic light emitting display that the present invention uses comprises: scan line 2 and data wire 1 that many bar insulations intersect; Be formed with pixel electrode 7 in scan line 2 and data wire 1 separated region, scan line 2 is provided with switching thin-film transistor 5, drive thin film transistors 6 and Organic Light Emitting Diode with data wire 1 infall; Many vdd lines 4 extend along said data wire direction, and vdd line 4 links to each other with the drain electrode of drive thin film transistors 6, and link to each other through the grid of storage capacitance 3 and drive thin film transistors 6; The anode of said Organic Light Emitting Diode links to each other with the source electrode of drive thin film transistors 6, and its negative electrode links to each other with the VSS line that links to each other; Data wire 1 overlaps with pixel electrode 7 parts.

The equivalence image element circuit is referring to Fig. 2, and vdd line 4 links to each other with the drain electrode of drive thin film transistors T2, and links to each other through the grid of storage capacitance Cs and drive thin film transistors T2; Many VSS lines; The VSS line links to each other with the negative electrode of Organic Light Emitting Diode (OLED); The anode of said Organic Light Emitting Diode links to each other with the source electrode of drive thin film transistors T2; The grid of switching thin-film transistor T1 links to each other with scan line 2 and receives line scan signals Vscan, and source electrode links to each other with data wire 1 and receives data-signal Vdata.

Fig. 4 is the repairing schematic flow sheet of data broken string of the present invention.

See also Fig. 4, the restorative procedure of active matrix/organic light emitting display array base palte data wire provided by the invention comprises the steps:

Step S401: the position of specified data line broken string;

Step S402: the break pixel drive thin-film transistor 6 of position of data was lost efficacy;

Step S403: with data break two ends and this pixel electrode welding;

Step S404: pixel electrode is repaired this data broken string as patchcord.

Specifically; The restorative procedure of above-mentioned active matrix/organic light emitting display array base palte data wire; Said pixel drive TFT was lost efficacy can adopt laser cutting method, at cut point 9 said pixel drive TFT grid is broken off from a side of array pole plate, as shown in Figure 5.The preferred laser welding method that adopts is with broken data wire two ends and this pixel electrode welding, and pixel electrode should break first pad 10 as shown in Figure 6 and second pad 11 as the patchcord reparation like this.

Though the present invention discloses as above with preferred embodiment; Right its is not that any those skilled in the art are not breaking away from the spirit and scope of the present invention in order to qualification the present invention; When can doing a little modification and perfect, so protection scope of the present invention is when being as the criterion with what claims defined.

Claims

1. the restorative procedure of an active matrix/organic light emitting display array base palte data wire, said substrate pixel circuit comprises:

Scan line (2) and data wire (1) that many bar insulations intersect; Be formed with pixel electrode (7) in said scan line (2) and data wire (1) separated region, said scan line (2) and data wire (1) infall are provided with switching thin-film transistor (5), drive thin film transistors (6) and Organic Light Emitting Diode;

Many vdd lines (4) extend along said data wire direction, and said vdd line (4) links to each other with the drain electrode of drive thin film transistors (6), and link to each other through the grid of storage capacitance (3) and drive thin film transistors (6);

The anode of said Organic Light Emitting Diode links to each other with the source electrode of drive thin film transistors (6), and its negative electrode links to each other with the VSS line;

It is characterized in that said data wire (1) and pixel electrode (7) part overlap, said method for repairing and mending comprises the steps:

A) position of specified data line broken string;

B) the break pixel drive thin-film transistor (6) of position of data was lost efficacy;

C), let pixel electrode repair this data broken string as patchcord with data break two ends and this pixel electrode welding.

2. the restorative procedure of active matrix/organic light emitting display array base palte data wire as claimed in claim 1; It is characterized in that; Said step b) adopts laser cutting method to break off from a side of the display array substrate grid with the drive thin film transistors (6) of said bad pixel point, makes drive thin film transistors (6) inefficacy of said bad pixel point.

3. the restorative procedure of active matrix/organic light emitting display array base palte data wire as claimed in claim 1 is characterized in that, said step c) adopts the laser welding method that broken data wire two ends and this pixel electrode are welded together.