CN102509720B

CN102509720B - Repair method for data wires of array substrate of active matrix organic light emitting display

Info

Publication number: CN102509720B
Application number: CN201110419048.2A
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: 2014-07-02
Anticipated expiration: 2031-12-15
Also published as: CN102509720A

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 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, the advantages 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 current flat panel display.

In AMOLED preparation process, bad and the holding wire broken string of the pixel of AMOLED display is bad is the inevitable two class major defects that occur in preparation technology, and after this two classes defect major part concentrates on array processes end, above-mentioned when bad when detecting, just need to repair accordingly.Bad for the broken data wire occurring after encapsulation, 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 product yield, and simple to operate, easy to implement.

Summary of the invention

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

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

The restorative procedure of above-mentioned active matrix/organic light emitting display array base palte data wire, wherein, described step b) adopts laser cutting method from a side of display array substrate, the grid of the driving thin-film transistor of described bad pixel point to be disconnected, and makes the driving film crystal tube failure of described bad pixel point.

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

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

Accompanying drawing explanation

Fig. 1 is a kind of dot structure schematic diagram 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 schematic diagram 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;

Fig. 5 makes to break the schematic diagram that position pixel driver TFT lost efficacy in the embodiment of the present invention;

Fig. 6 is the schematic diagram that welding pixel electrode of the present invention and data broken string two ends are repaired data wire.

In figure:

1 data wire 2 scan line 3 storage capacitances

4 vdd line 5 switching thin-film transistors 6 drive thin-film transistor

7 pixel electrode 9 cut point 10 first pads

11 second pads.

Embodiment

Below in conjunction with drawings and Examples, the invention will be further described.

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

Refer to 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, in scan line 2 and data wire 1 separated region, be formed with pixel electrode 7, scan line 2 and data wire 1 infall are provided with switching thin-film transistor 5, drive thin-film transistor 6 and Organic Light Emitting Diode; Many vdd lines 4, extend along described data wire direction, and vdd line 4 is connected with the drain electrode that drives thin-film transistor 6, and are connected with the grid that drives thin-film transistor 6 by storage capacitance 3; The anode of described Organic Light Emitting Diode is connected with the source electrode that drives thin-film transistor 6, and its negative electrode is connected with the VSS line that is connected; Data wire 1 and pixel electrode 7 parts are overlapping.

Equivalence image element circuit is referring to Fig. 2, and vdd line 4 is connected with the drain electrode that drives thin-film transistor T2, and is connected with the grid that drives thin-film transistor T2 by storage capacitance Cs; Many VSS lines, VSS line is connected with the negative electrode of Organic Light Emitting Diode (OLED), the anode of described Organic Light Emitting Diode is connected with the source electrode that drives thin-film transistor T2, the grid of switching thin-film transistor T1 is connected with scan line 2 and receives line scan signals Vscan, and source electrode is connected 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.

Refer to 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 driver thin-film transistor 6 of position of data was lost efficacy;

Step S403: by 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, described pixel driver TFT was lost efficacy and can adopt laser cutting method, described pixel drive TFT grid is disconnected at cut point 9 from a side of array pole plate, as shown in Figure 5.Preferably adopt laser welding method by broken data wire two ends and this pixel electrode welding, pixel electrode is repaired this broken string as patchcord like this, the first pad 10 as shown in Figure 6 and the second pad 11.

Although the present invention discloses as above with preferred embodiment; so it is not in order to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little modification and perfect, therefore protection scope of the present invention is worked as with being as the criterion that claims were defined.

Claims

1. a restorative procedure for active matrix/organic light emitting display array base palte data wire, described substrate pixel circuit comprises:

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

Many vdd lines (4), extend along described data wire direction, and described vdd line (4) is connected with the drain electrode that drives thin-film transistor (6), and are connected with the grid that drives thin-film transistor (6) by storage capacitance (3);

The anode of described Organic Light Emitting Diode is connected with the source electrode that drives thin-film transistor (6), and its negative electrode is connected with VSS line;

It is characterized in that, a wherein side of described pixel electrode (7) is all overlapping with data wire (1), and described restorative procedure comprises the steps:

A) position of specified data line broken string;

B) adopt laser cutting method from a side of display array substrate, the grid of the driving thin-film transistor (6) of bad pixel point to be disconnected, the pixel driver thin-film transistor (6) of data broken string position was lost efficacy;

C) data are broken two ends and this pixel electrode welding, allows pixel electrode repair this data broken string as patchcord.

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