CN102437112A - Method for repairing pixel circuit of active matrix organic light emitting display substrate - Google Patents
Method for repairing pixel circuit of active matrix organic light emitting display substrate Download PDFInfo
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- CN102437112A CN102437112A CN2011104190355A CN201110419035A CN102437112A CN 102437112 A CN102437112 A CN 102437112A CN 2011104190355 A CN2011104190355 A CN 2011104190355A CN 201110419035 A CN201110419035 A CN 201110419035A CN 102437112 A CN102437112 A CN 102437112A
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Abstract
The invention discloses a method for repairing a pixel circuit of an active matrix organic light emitting display substrate. The pixel circuit comprises a plurality of scanning lines and data lines which are intercrossed in an insulation manner, and a plurality of virtual device driver (VDD) lines and a plurality of visual source safe (VSS) lines, wherein pixel electrodes are formed in a region for separating the scanning lines and the data lines; a switching thin film transistor (TFT), a driving TFT and an organic light emitting diode are arranged on the intercrossed part of the scanning lines and the data lines; the VSS lines are connected with the negative electrode of the organic light emitting diode; and the positive electrode of the organic light emitting diode is connected with the source of the driving TFT. By the method for repairing the pixel circuit of the active matrix organic light emitting display substrate, the driving TFT of an unqualified pixel fails and the pixel electrode is connected with the VSS lines in the row where the pixel is placed, so that the organic light emitting diode of the pixel is cut off to be changed into a dark point; therefore, abnormal bright points are repaired into the dark points, and the yield of the product is increased; furthermore, the method is easy to operate and implement.
Description
Technical field
The present invention relates to a kind of method for repairing and mending of image element circuit, relate in particular to a kind of method for repairing and mending of active matrix/organic light emitting display substrate pixel circuit.
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.Pixel for occurring after the encapsulation is bad, and prior art does not provide realistic plan.Therefore, be necessary to provide the method for repairing and mending of active matrix/organic light emitting display substrate pixel circuit, 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 method for repairing and mending of active matrix/organic light emitting display substrate pixel circuit, can unusual bright spot be accomplished dim spot, improves the product yield, and simple to operate, easy to implement.
The present invention solves the problems of the technologies described above the method for repairing and mending that the technical scheme that adopts provides a kind of active matrix/organic light emitting display substrate pixel circuit; 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 and drive thin film transistors; 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; Many VSS lines extend along said scan-line direction, and the negative electrode of said VSS line and Organic Light Emitting Diode links to each other, and the anode of said Organic Light Emitting Diode links to each other with the source electrode of drive thin film transistors; Said method for repairing and mending comprises the steps: a) to confirm the bad pixel point position that unusual bright spot is corresponding; B) drive thin film transistors with this bad pixel point lost efficacy; The VSS line of c) pixel electrode of this bad pixel point and this pixel being expert at is connected together, and makes the Organic Light Emitting Diode of this pixel turn-off and becomes dim spot.
The method for repairing and mending of above-mentioned active matrix/organic light emitting display substrate pixel circuit; 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 method for repairing and mending of above-mentioned active matrix/organic light emitting display substrate pixel circuit, wherein, the VSS line that said step c) adopts the laser welding method that this pixel electrode and this pixel are expert at is welded together.
The present invention contrasts prior art has following beneficial effect: the method for repairing and mending of active matrix/organic light emitting display substrate pixel circuit provided by the invention; Through elder generation the drive TFT of bad pixel was lost efficacy; The VSS line of then its pixel electrode and this pixel being expert at is connected together, and makes the Organic Light Emitting Diode of this pixel turn-off and becomes dim spot.
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 flow chart of the method for embodiment of the invention inpainted pixels;
The sketch map that Fig. 5 lost efficacy for the drive TFT of giving a piece of bad advice in the embodiment of the invention a little;
Fig. 6 makes unusual bright spot accomplish the sketch map of dim spot for welding anode of the present invention and VSS line.
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, 8 VSS lines, 9 cut points
10 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 active matrix/organic light emitting display provided by the invention 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 and drive thin film transistors 6 with data wire 1 infall; Many vdd lines 4 extend along data wire 1 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; Many VSS lines 8 extend along scan line 2 directions, and the negative electrode of VSS line 8 and Organic Light Emitting Diode links to each other, and the anode of Organic Light Emitting Diode links to each other with the source electrode of drive thin film transistors 6.
The equivalence image element circuit is referring to Fig. 2, and the drain electrode of said vdd line 4 and drive thin film transistors T2 links to each other, and links to each other through the grid of storage capacitance Cs and drive thin film transistors T2; Many VSS lines 8; Extend along said scan-line direction; Said VSS line 8 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, and 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 flow chart of the method for embodiment of the invention inpainted pixels.
See also Fig. 4, the method for repairing and mending of active matrix/organic light emitting display substrate pixel circuit provided by the invention comprises the steps:
Step S401: confirm unusual bright spot location of pixels;
Step S402: adopt laser cutting method that said pixel drive TFT was lost efficacy;
Step S403: the VSS line that pixel electrode and this pixel of this bad pixel point are expert at is connected together;
Step S404: make the Organic Light Emitting Diode shutoff of this pixel become dim spot, accomplish the reparation of unusual bright spot pixel.
The method for repairing and mending of above-mentioned active matrix/organic light emitting display substrate pixel circuit lost efficacy said pixel drive TFT and can adopt laser cutting method, said pixel drive TFT grid was broken off at cut point 9 from a side of array pole plate, and is as shown in Figure 5.The pixel electrode of preferred this bad pixel point of employing laser welding method is connected together with the VSS line that this pixel is expert at, and the Organic Light Emitting Diode of this pixel that breaks down turn-offs and becomes dim spot, pad 10 as shown in Figure 6 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 (3)
1. the method for repairing and mending of an active matrix/organic light emitting display substrate pixel circuit, 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) and drive thin film transistors (6);
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);
Many VSS lines (8) extend along said scan-line direction, and the negative electrode of said VSS line (8) and Organic Light Emitting Diode links to each other, and the anode of said Organic Light Emitting Diode links to each other with the source electrode of drive thin film transistors (6);
It is characterized in that said method for repairing and mending comprises the steps:
A) confirm the bad pixel point position that unusual bright spot is corresponding;
B) drive thin film transistors (6) with this bad pixel point lost efficacy;
The VSS line of c) pixel electrode of this bad pixel point and this pixel being expert at is connected together, and makes the Organic Light Emitting Diode of this pixel turn-off and becomes dim spot.
2. the method for repairing and mending of active matrix/organic light emitting display substrate pixel circuit 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 method for repairing and mending of active matrix/organic light emitting display substrate pixel circuit as claimed in claim 1 is characterized in that, the VSS line that said step c) adopts the laser welding method that this pixel electrode and this pixel are expert at is welded together.
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| CN 201110419035 CN102437112B (en) | 2011-12-15 | 2011-12-15 | Method for repairing pixel circuit of active matrix organic light emitting display substrate |
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| CN103035204A (en) * | 2012-12-27 | 2013-04-10 | 昆山工研院新型平板显示技术中心有限公司 | Repairing method of active matrix organic light-emitting diode (LED) display |
| CN105845085A (en) * | 2016-05-27 | 2016-08-10 | 京东方科技集团股份有限公司 | Pixel circuit, method for repairing pixel bright spot and display device |
| CN105892186A (en) * | 2016-06-13 | 2016-08-24 | 深圳市华星光电技术有限公司 | Array substrate structure and data wire breakage repairing method thereof as well as display device |
| WO2016169080A1 (en) * | 2015-04-23 | 2016-10-27 | 深圳市华星光电技术有限公司 | Bright spot-repaired liquid crystal panel and bright spot repair method therefor |
| CN106941135A (en) * | 2017-04-11 | 2017-07-11 | 武汉华星光电技术有限公司 | The method for repairing and mending and organic electroluminescence display panel of a kind of organic electroluminescence display panel |
| CN107221287A (en) * | 2017-07-31 | 2017-09-29 | 京东方科技集团股份有限公司 | Display panel and its pixel prosthetic device, pixel repairing method and display |
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| WO2018120754A1 (en) * | 2016-12-28 | 2018-07-05 | 京东方科技集团股份有限公司 | Oled array substrate, display device, and dark spot fixing method therefor |
| WO2019015169A1 (en) * | 2017-07-19 | 2019-01-24 | 深圳市华星光电半导体显示技术有限公司 | Obscuring method for display device with defective line |
| CN110223638A (en) * | 2013-05-22 | 2019-09-10 | 三星显示有限公司 | Organic light-emitting display device and the method for repairing organic light-emitting display device |
| CN110459578A (en) * | 2019-08-21 | 2019-11-15 | 合肥鑫晟光电科技有限公司 | Display base plate and preparation method thereof and restorative procedure, display device |
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| CN114333695A (en) * | 2021-12-27 | 2022-04-12 | 武汉天马微电子有限公司 | Display panel, repairing method and display device |
| WO2023133912A1 (en) * | 2022-01-12 | 2023-07-20 | 深圳市华星光电半导体显示技术有限公司 | Display panel and method for repairing same |
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| CN103035204B (en) * | 2012-12-27 | 2015-05-27 | 昆山工研院新型平板显示技术中心有限公司 | Repairing method of active matrix organic light-emitting diode (LED) display |
| CN103035204A (en) * | 2012-12-27 | 2013-04-10 | 昆山工研院新型平板显示技术中心有限公司 | Repairing method of active matrix organic light-emitting diode (LED) display |
| CN110223638B (en) * | 2013-05-22 | 2023-08-18 | 三星显示有限公司 | Organic light emitting display device and method of repairing the same |
| CN110223638A (en) * | 2013-05-22 | 2019-09-10 | 三星显示有限公司 | Organic light-emitting display device and the method for repairing organic light-emitting display device |
| USRE49484E1 (en) | 2013-05-22 | 2023-04-04 | Samsung Display Co., Ltd. | Organic light-emitting display apparatus and method of repairing the same |
| WO2016169080A1 (en) * | 2015-04-23 | 2016-10-27 | 深圳市华星光电技术有限公司 | Bright spot-repaired liquid crystal panel and bright spot repair method therefor |
| GB2550726A (en) * | 2015-04-23 | 2017-11-29 | Shenzhen China Star Optoelect | Bright spot-repaired liquid crystal panel and bright spot repair method therefor |
| GB2550726B (en) * | 2015-04-23 | 2021-04-14 | Shenzhen China Star Optoelect | Liquid Crystal Display panel with hot pixel being repaired and method for repairing hot pixel |
| CN105845085A (en) * | 2016-05-27 | 2016-08-10 | 京东方科技集团股份有限公司 | Pixel circuit, method for repairing pixel bright spot and display device |
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| WO2018120754A1 (en) * | 2016-12-28 | 2018-07-05 | 京东方科技集团股份有限公司 | Oled array substrate, display device, and dark spot fixing method therefor |
| CN108258007A (en) * | 2016-12-28 | 2018-07-06 | 京东方科技集团股份有限公司 | OLED array, display device and its dim spot restorative procedure |
| US10249700B2 (en) | 2016-12-28 | 2019-04-02 | Boe Technology Group Co., Ltd. | OLED array substrate, display apparatus and method for repairing dark spot thereon |
| CN108258007B (en) * | 2016-12-28 | 2019-12-03 | 京东方科技集团股份有限公司 | OLED array, display device and its dim spot restorative procedure |
| CN106941135A (en) * | 2017-04-11 | 2017-07-11 | 武汉华星光电技术有限公司 | The method for repairing and mending and organic electroluminescence display panel of a kind of organic electroluminescence display panel |
| CN107248391A (en) * | 2017-06-27 | 2017-10-13 | 京东方科技集团股份有限公司 | Display panel and preparation method thereof, method for maintaining and display device |
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Owner name: KUNSHAN GUOXIAN OPTOELECTRONICS CO., LTD. Free format text: FORMER OWNER: KUNSHAN INDUSTRY RESEARCH ACADEMY NOVEL FLAT PANEL DISPLAY TECHNOLOGY CENTER CO., LTD. Effective date: 20150320 |
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Effective date of registration: 20150320 Address after: 215300, No. 1, Longteng Road, Kunshan Development Zone, Jiangsu, 4 Patentee after: Kunshan Guo Xian Photoelectric Co., Ltd. Address before: 215300, 188, Feng Feng Road, hi tech Zone, Kunshan, Jiangsu, Suzhou Patentee before: Kunshan Industry Research Academy Novel Flat Panel Display Technology Center Co., Ltd. |