CN102983283B - Repairable AMOLED device, display screen and method for repairing and mending thereof - Google Patents
Repairable AMOLED device, display screen and method for repairing and mending thereof Download PDFInfo
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- CN102983283B CN102983283B CN201210502971.7A CN201210502971A CN102983283B CN 102983283 B CN102983283 B CN 102983283B CN 201210502971 A CN201210502971 A CN 201210502971A CN 102983283 B CN102983283 B CN 102983283B
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Abstract
The invention discloses the method for repairing and mending of a kind of repairable AMOLED device and this AMOLED device displays.This AMOLED device comprises electrode and organic luminous layer, and described electrode is divided into multiple subpixel area, and each subpixel area and at least one in other adjacent subpixel area are formed by connecting bridge and be electrically connected.When there is dim spot or bright spot, by laser, the connecting bridge occurred between the subpixel area of the negative electrode of defect and other subpixel area can be cut off, thus the electrical connection disconnected between this subpixel area and other subpixel area disconnects, method is simple, be easy to operation, laser preparing can be reduced to the damage in other regions of pixel by minimally, thus reach the object improving yield.
Description
Technical field
The present invention relates to OLED(OrganicLightEmittingDiode, Organic Light Emitting Diode) technical field, specifically, be repairable AMOLED(ActiveMatrixOLED, Activematric OLED) device, display screen and method for repairing and mending thereof.
Background technology
OLED display device is active illuminating device, compare present main flow flat panel display Thin Film Transistor-LCD (TFT-LCD), OLED has the advantages such as high-contrast, wide viewing angle, low-power consumption, volume be thinner, being expected to the flat panel display of future generation become after LCD, is one of the maximum technology that receives publicity in current flat panel display.
Typical OLED comprises anode, negative electrode and is placed in the emission layer between these two electrodes.When applying voltage between anode and negative electrode, hole and electronics move to emission layer, and recombine in emission layer and luminous.
In OLED, be applied with voltage also non-luminous dim spot even if may cause due to the short circuit between anode and negative electrode.Also may there is due to TFT backplate in pixel the bright spot that defect (as anode and power line short circuit) causes.
In AMOLED device, because DSD dark spot defect appears in the partial short-circuit between anode and negative electrode, a problem of this dim spot is, along with time lapse, the size of dim spot becomes large, and to the last whole unit pixel becomes a dark pixel that can not be lit, and causes the reliability decrease of OLED.
In order to avoid above-mentioned defect causes harmful effect to OLED display screen, need to repair the dim spot occurred or bright spot.Method for repairing and mending for dim spot routine is removed by short-circuited region impurity with laser, but the viewing area of this method meeting damages peripheral, or make figure at pixel electrode (anode), pixel segmentation is opened, but due to TFT(ThinFilmTransistor, Thin Film Transistor (TFT)) (the particularly application of compensating circuit of array complexity, as 6T2C, 5T1C), laser is difficult to repair for anode through tft array, and if carry out repairing from cathode side antianode and will certainly cause damage to whole OLED pixel.
And be the circuit that backups on TFT backplate circuit for the method for repairing and mending of fleck defect routine, or first cut off data wire, then OLED is held TFT to receive fixed potential by solder pad, make OLED negative electrode and anode keep equipotential, the shortcoming of the method to occupy wiring space, affects aperture opening ratio.Other method is directly destroyed from OLED side by negative electrode and OLED material, and this method may damages peripheral pixel, or causes anode and negative electrode short circuit in mending course, if anode just with the short circuit of peripheral power supply line, whole display floater will be caused to lose efficacy; And laser preparing shape is difficult to regularization, causes part OLED area damages incomplete, be shown as sparklet.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of method for repairing and mending simple, be easy to operation, need not oled layer be destroyed, the damage of laser to neighboring pixel is dropped to minimum, repairs repairable AMOLED device, display screen and method for repairing and mending thereof that yield is high.
In order to solve the problems of the technologies described above, the invention provides a kind of repairable AMOLED device, comprise electrode and organic luminous layer, described electrode is divided into multiple subpixel area, and each subpixel area and at least one in other adjacent subpixel area are formed by connecting bridge and be electrically connected.
Further, the electrode of each described subpixel area is divided into multiple subregion, and every sub regions and at least one in other adjacent subregion are formed by connecting bridge and be electrically connected.
Further, described electrode refers to negative electrode.
Further, the shape of described subpixel area is square, rectangle, circle, triangle or polygon.
Further, described connecting bridge is formed in the middle part on the adjacent limit of described subpixel area.
Further, described connecting bridge is equipped with between described subpixel area and all adjacent subpixel area.
Further, described connecting bridge is also formed between the corner of the described subpixel area subpixel area adjacent with other.
Further, by radome by described cathode pattern, thus described negative electrode is divided into multiple subpixel area.
Further, the rgb pixel for the openings of sizes and AMOLED device that make the radome of figure is in the same size.
The present invention also provides a kind of display screen be made up of above-mentioned repairable AMOLED device.
The present invention also provides a kind of method for repairing and mending of AMOLED device, comprising:
Detect region AMOLED device occurring defect;
Laser is utilized the connecting bridge between the subpixel area of the negative electrode corresponding to the region going out defect and other subpixel area to be cut off.
Repairable AMOLED device of the present invention, display screen and method for repairing and mending thereof, when there is dim spot or bright spot, by laser, the connecting bridge occurred between the subpixel area of the negative electrode of defect and other subpixel area can be cut off, thus the electrical connection disconnected between this subpixel area and other subpixel area disconnects, method is simple, be easy to operation, laser preparing can be reduced to the damage in other regions of pixel by minimally, thus reach the object improving yield.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the first embodiment of repairable AMOLED device of the present invention.
Fig. 2 is the schematic diagram of the second embodiment of repairable AMOLED device of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described, can better understand the present invention and can be implemented, but illustrated embodiment is not as a limitation of the invention to make those skilled in the art.
Repairable AMOLED device of the present invention, comprise electrode and organic luminous layer, wherein electrode is divided into multiple subpixel area, and each subpixel area and at least one in other adjacent subpixel area are formed by connecting bridge and be electrically connected.Electrode comprises negative electrode and anode, and negative electrode and anode can be divided into multiple subpixel area.If by antianode segmentation realize repair, because anode-side has a lot of metal element to keep off, carrying out repairing from TFT side has larger operation easier, and if repair from OLED side, OLED can be damaged, therefore preferably negative electrode is split.The shape of subpixel area can be square, rectangle, circle, triangle or polygon etc.Connecting bridge is formed in the middle part on the adjacent limit of described subpixel area.Display of the present invention comprises pel array, and each pixel in pel array is made up of above-mentioned repairable AMOLED device.
First embodiment of of the present invention repairable AMOLED device as shown in Figure 1, in the present embodiment, when making AMOLED device, first TFT substrate is prepared, form anode, organic luminous layer and negative electrode 1 on the substrate, utilize radome (Shadowmask) by this negative electrode 1 patterning, make negative electrode 1 be divided into multiple subpixel area 2, each subpixel area 2 and other adjacent subpixel area 2 ' are formed by connecting bridge 3 and are electrically connected.
The OLED that inspection manufactures with said method, and when this OLED has bright spot to produce, detect the subpixel area 2 causing the short-circuited region of dark pixel corresponding, when there is fleck defect in wherein one or more subpixel area, the connecting bridge 3a on this region is connected to by negative electrode laser cutting, 3b, 3c, 3d, 3e, 3f, 3g and 3h, disconnect the electrical connection with other subpixel area 2 ', thus reach object bright point repairing being become dim spot, and ensure that other regions of this pixel still normally work, minimally reduces laser preparing to the damage in other regions of pixel.When by cathode pattern, Mask determines to need whole stretching out in process in nation, consider that Mask nation determines the problem of tension force, stretch to light-emitting zone to prevent figure from occurring distortion thus reduce light-emitting zone area, between each subpixel area and all adjacent subpixel area, all connecting bridge can be set, except the middle part on the adjacent limit in subpixel area is formed except connecting bridge 3a, 3c, 3e, 3g, can also also form connecting bridge 3b, 3d, 3f, 3h between the subpixel area that the corner of subpixel area is adjacent with other.Shadowmask openings of sizes for making figure can be in the same size with the rgb pixel of AMOLED device, can realize with existing evaporation process.
In addition, can also split again, the electrode of subpixel area is divided into multiple less subregion to the electrode of subpixel area (especially negative electrode), every sub regions and at least one in other adjacent subregion are formed by connecting bridge and are electrically connected.Second embodiment of of the present invention repairable AMOLED device as shown in Figure 2, in the present embodiment, by negative electrode 4 patterning of radome (Shadowmask) by subpixel area, be divided into multiple subregion 5, between subregion 5, form electrical connection by connecting bridge 6.Check whether OLED has dark pixel to produce, and when this OLED has dark pixel to produce, detect the subregion causing the short-circuited region of dark pixel corresponding, the connecting bridge on this region is connected to by negative electrode laser cutting, disconnect the electrical connection with other region, thus by the dim spot reparation in this region, and ensureing that other regions of this pixel still normally work, minimally reduces laser preparing to the damage in other regions of pixel.By subpixel area is split further, can realize repairing more accurately, the impact of defect on AMOLED device is dropped to minimum.
The method for repairing and mending of AMOLED device of the present invention, comprising:
Detect region AMOLED device occurring defect;
Laser is utilized the connecting bridge between the subpixel area of the negative electrode corresponding to the region going out defect and other subpixel area to be cut off.
Be no matter produce the defect of dim spot or produce the defect of bright spot, all can be repaired completely by above-mentioned method for repairing and mending, simple and convenient, there is versatility.
The pel array that display screen of the present invention is made up of multiple pixel cell is formed, and each pixel cell is made up of above-mentioned repairable AMOLED device.
The above embodiment is only that protection scope of the present invention is not limited thereto in order to absolutely prove the preferred embodiment that the present invention lifts.The equivalent alternative or conversion that those skilled in the art do on basis of the present invention, all within protection scope of the present invention.Protection scope of the present invention is as the criterion with claims.
Claims (8)
1. a repairable AMOLED device, comprises electrode and organic luminous layer, it is characterized in that, described electrode is divided into multiple subpixel area, and each subpixel area and at least one in other adjacent subpixel area are formed by connecting bridge and be electrically connected; The electrode of each described subpixel area is divided into multiple subregion, and every sub regions and at least one in other adjacent subregion are formed by connecting bridge and be electrically connected; The described connecting bridge be connected between each subpixel area and other adjacent subpixel area is formed in the corner of described subpixel area and adjacent subpixel area between the two.
2. repairable AMOLED device according to claim 1, it is characterized in that, described electrode refers to negative electrode.
3. repairable AMOLED device according to claim 1, is characterized in that, the shape of described subpixel area is square, rectangle, circle, triangle or polygon.
4. repairable AMOLED device according to claim 1, is characterized in that, the described connecting bridge be connected between each subpixel area and other adjacent subpixel area is also formed in the middle part on the adjacent limit of described subpixel area.
5. repairable AMOLED device according to claim 4, is characterized in that, is equipped with connecting bridge between described subpixel area and all adjacent subpixel area.
6. repairable AMOLED device according to claim 1, is characterized in that, by radome by described electrode patterning, thus described electrode is divided into multiple subpixel area.
7. repairable AMOLED device according to claim 6, is characterized in that, the rgb pixel for the openings of sizes and AMOLED device that make the radome of figure is in the same size.
8. the display screen be made up of the repairable AMOLED device described in claim 1 ~ 7 any one.
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| US9911799B2 (en) * | 2013-05-22 | 2018-03-06 | Samsung Display Co., Ltd. | Organic light-emitting display apparatus and method of repairing the same |
| KR102123979B1 (en) * | 2013-12-09 | 2020-06-17 | 엘지디스플레이 주식회사 | Organic light emitting display device having repair structure |
| 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 |
| CN114203782A (en) * | 2021-12-07 | 2022-03-18 | 深圳市华星光电半导体显示技术有限公司 | OLED display panel and repair method thereof |
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| CN1976054A (en) * | 2006-12-29 | 2007-06-06 | 清华大学 | Organic illuminating display device |
| CN101533844A (en) * | 2008-03-14 | 2009-09-16 | 北京京东方光电科技有限公司 | Thin film transistor array substrate and maintenance method thereof |
| CN101713892A (en) * | 2008-10-08 | 2010-05-26 | 瀚宇彩晶股份有限公司 | Pixel structure and method for repairing same |
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| KR100404204B1 (en) * | 2001-08-21 | 2003-11-03 | 엘지전자 주식회사 | organic electroluminescence device |
| KR100721948B1 (en) * | 2005-08-30 | 2007-05-25 | 삼성에스디아이 주식회사 | organic electro luminescence device display and method for fabricating the same |
| KR101022156B1 (en) * | 2009-02-16 | 2011-03-17 | 삼성모바일디스플레이주식회사 | Pixel Repair structure for Repairing Pixel Defect of Organic Light Emitting Display Device and Method of Repairing the Same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1976054A (en) * | 2006-12-29 | 2007-06-06 | 清华大学 | Organic illuminating display device |
| CN101533844A (en) * | 2008-03-14 | 2009-09-16 | 北京京东方光电科技有限公司 | Thin film transistor array substrate and maintenance method thereof |
| CN101713892A (en) * | 2008-10-08 | 2010-05-26 | 瀚宇彩晶股份有限公司 | Pixel structure and method for repairing same |
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Effective date of registration: 20201215 Address after: No.146 Tianying Road, high tech Zone, Chengdu, Sichuan Province Patentee after: Chengdu CHENXIAN photoelectric Co.,Ltd. Address before: No. 188, CHENFENG Road, Kunshan high tech Zone, Kunshan City, Suzhou City, Jiangsu Province Patentee before: Kunshan New Flat Panel Display Technology Center Co.,Ltd. |