CN102468449A - Method for eliminating electrode short circuit of organic electroluminescent display - Google Patents
Method for eliminating electrode short circuit of organic electroluminescent display Download PDFInfo
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- CN102468449A CN102468449A CN2010105476745A CN201010547674A CN102468449A CN 102468449 A CN102468449 A CN 102468449A CN 2010105476745 A CN2010105476745 A CN 2010105476745A CN 201010547674 A CN201010547674 A CN 201010547674A CN 102468449 A CN102468449 A CN 102468449A
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Abstract
The invention relates to a method for eliminating electrode short circuit of an organic electroluminescent display. The method comprises the following steps of: applying voltages to the upper and lower electrodes of a manufactured passive organic electroluminescent display device for lightening, wherein a voltage is applied to each of upper electrodes separately; observing whether adjacent electrodes to which no voltage is applied are lightened, wherein a lightened point is a short-circuited point, and a non-lightened point is qualified; and applying a low-voltage direct-current voltage between adjacent upper short-circuited electrodes, keeping for certain seconds, retesting, and keeping increasing a voltage value until a short-circuit point is eliminated. Due to the adoption of the method, the defect of line (or row) electrode short circuit of the passively-driven organic electroluminescent display can be overcome effectively, the yield of the display is increased, and the yield and the production efficiency of device production are increased.
Description
Technical field
The present invention relates to a kind of flat panel display, particularly a kind of method of eliminating the display of organic electroluminescence electric pole short circuit.
Background technology
Characteristics such as that the organic electroluminescent flat-panel monitor has is all solid state, active illuminating, color are good, in light weight, thin thickness, visual angle are big, simple in structure are acknowledged as the flat-panel monitor of future generation that future can the replacement liquid crystal display.The display of organic electroluminescence (PM-OLED) that passive type drives because simple in structure, production process is few, cost is low, therefore on undersized display of organic electroluminescence, has occupied certain market.
The step of the display of organic electroluminescence that passive type commonly used drives comprises: at first the method with plated film+photoetching is made into bottom electrode on glass substrate; This bottom electrode can be used as the column or row electrode that display drives; Usually as the row electrode, electric conducting material commonly used is ITO.And then make insulated column in the above, this insulated column is shaped with the method for organic membrane through photoetching usually, must be made into up big and down small handstand trapezoidal shape, as isolating top electrode.Then plate the multilayer organic film, plate the electrode conductive material film then, material commonly used is a metallic aluminium.Because the existence of insulated column, upper electrode film is isolated into strip, forms the shape of row (perhaps row) electrode.At last with the display encapsulation, with exclusion of water and oxygen.
Insulated column must be isolated into strip fully with top electrode, does not contact mutually between bar and the bar, is short-circuited to avoid adjacent lines (perhaps row) electrode.But, insulated column possibly can not be isolated top electrode fully in the subregion because particle exists or other reasons in the manufacturing process.Also possible reason is that the trapezoidal shape of the handstand of insulated column is good inadequately, also can cause top electrode not isolate fully.As long as there is a some top electrode not isolate fully, with regard to short circuit, entire device just becomes a waste product to the adjacent row (perhaps row) in this place.
Summary of the invention
The top electrode problem of short-circuit takes place because of the insulated column defective in what The present invention be directed to present making passive type display of organic electroluminescence easily; Propose a kind of method of eliminating the display of organic electroluminescence electric pole short circuit, can effectively eliminate row (or row) this defective of short circuit of the display of organic electroluminescence of passive type driving.
Technical scheme of the present invention is: a kind of method of eliminating the display of organic electroluminescence electric pole short circuit, and the method concrete steps are following:
1) the passive type organic elctroluminescent device upper/lower electrode making alive that completes is lighted, the independent making alive of each strip electrode of top electrode wherein, whether adjacent do not have alive electrode light, light up as short dot if observing, and it is qualified not light up as;
2) if adjacent top electrode finds that short circuit phenomenon is arranged, remove test voltage, between the adjacent top electrode of this short circuit, add the direct voltage of a low pressure, keep several seconds, remove direct voltage again;
3) display device upper/lower electrode making alive is lighted tested again, observe original short dot whether also exist,, after the direct voltage between the adjacent top electrode that is added in short circuit increased, repeating step 2 if still find short circuit), 3);
4) if finding short circuit disappears, repeat 1)～3) continue next strip electrode test, up to the whole test of accomplishing product.
The direct voltage of the low pressure said step 2) is 6 volts, follow-up progressively increase, and final voltage can not be above 30 volts.
Direct voltage is increased in the said step 3), is the basis with voltage last time, and the voltage of increase is the 1-3 volt.
Institute's making alive is up to direct current 30V between the adjacent top electrode of said this short circuit.
Beneficial effect of the present invention is: the present invention eliminates the method for display of organic electroluminescence electric pole short circuit; Can effectively eliminate row (or row) this defective of electric pole short circuit of the display of organic electroluminescence of passive type driving; Thereby improve the qualification rate of display, improve the rate of finished products and the production efficiency of device production.
Description of drawings
Fig. 1 eliminates the operation chart of display of organic electroluminescence electric pole short circuit for the present invention.
Embodiment
Operation chart as shown in Figure 1 comprises display device 1, a viewing area 2, top electrode 3, short circuit place 4, eliminates the added DC power supply 5 of circuit defect among the figure.
1.4 inches monochromatic PMOLED display devices that test 1 adopts Shanghai opto-electrical Electron Co., Ltd to make.In this device fabrication processes, make insulated column with photoresist, insulated column is shaped as the trapezoidal of handstand, highly is about 1.5 microns.With the metallic aluminium film as top electrode.The aluminium film is isolated into column electrode by insulated column.After element manufacturing is accomplished, find wherein to have two adjacent row top electrodes that short circuit phenomenon is arranged through test.With probe this two the row on add 6 volts direct voltages, kept for 5 seconds after, again the test, the discovery short circuit phenomenon still exist.Direct voltage is raise, repeat the step of " adding direct voltage-test-boosted voltage-test again ".Voltage be elevated to 12 volts and kept for 5 seconds after, find that through test this short circuit disappears.This display becomes qualified product.
3.2 inches monochromatic PMOLED display devices that test 2 adopts Shanghai opto-electrical Electron Co., Ltd to make, the insulated column of device fabrication processes and aluminium top electrode thickness are with embodiment 1.Find wherein to have two adjacent row top electrodes that short circuit phenomenon is arranged through test.Through repetitive process with test 1 " add direct voltage-test-boosted voltage-test " again, voltage be elevated to 15 volts and kept for 5 seconds after, through this short circuit disappearance of test discovery.This display becomes qualified product.
A kind of method of the top electrode short circuit of eliminating the passive type display of organic electroluminescence is specific as follows:
1) the passive type organic elctroluminescent device upper/lower electrode making alive that completes is lighted; The independent making alive of each strip electrode of top electrode wherein; Whether adjacent do not have alive electrode light, testing adjacent top electrode with this does not have and be short-circuited if observing;
2) if adjacent top electrode finds that short circuit phenomenon is arranged, remove test voltage, between the adjacent top electrode of this short circuit, add a suitable direct voltage, keep several seconds, remove direct voltage again;
3) display device upper/lower electrode making alive is lighted tested again, observe original short dot whether also exist,, after direct voltage is increased, repeating step 2 if still find short circuit), 3);
4) if finding short circuit disappears, explain that the top electrode circuit defect at this place is eliminated.
The general added-time for the first time is generally 6 volts, and follow-up progressively increase is the basis with original voltage, and each voltage that increases is the 1-3 volt, and final voltage can not be above 30 volts.
Defective owing to insulated column between the adjacent top electrode can not be isolated electrode fully, and causes short circuit.After adding a direct voltage between the top electrode, electric current passes through from electrode-fault location-electrode.The resistance of this fault location is usually greater than the resistance of electrode itself, thus fault location can because of electric current through producing heat, the fault location temperature is raise.If what electrode material used is fusible metal, such as aluminium, the metal of this short circuit place will fuse, thereby short circuit is eliminated.Because this voltage directly is not added on the organic layer, and electric current is on the top electrode on the surface of organic layer, to flow through,, just can not cause damage simultaneously to organic layer so as long as voltage is not very high, electric current is not very big.
Claims (4)
1. a method of eliminating the display of organic electroluminescence electric pole short circuit is characterized in that, the method concrete steps are following:
1) the passive type organic elctroluminescent device upper/lower electrode making alive that completes is lighted, the independent making alive of each strip electrode of top electrode wherein, whether adjacent do not have alive electrode light, light up as short dot if observing, and it is qualified not light up as;
2) if adjacent top electrode finds that short circuit phenomenon is arranged, remove test voltage, between the adjacent top electrode of this short circuit, add the direct voltage of a low pressure, keep several seconds, remove direct voltage again;
3) display device upper/lower electrode making alive is lighted tested again, observe original short dot whether also exist,, after the direct voltage between the adjacent top electrode that is added in short circuit increased, repeating step 2 if still find short circuit), 3);
4) if finding short circuit disappears, repeat 1)～3) continue next strip electrode test, up to the whole test of accomplishing product.
2. according to the method for the said elimination display of organic electroluminescence of claim 1 electric pole short circuit, it is characterized in that said step 2) in the direct voltage of low pressure be 6 volts, follow-uply progressively increase, final voltage can not be above 30 volts.
3. according to the method for the said elimination display of organic electroluminescence of claim 1 electric pole short circuit, it is characterized in that direct voltage is increased in the said step 3), be the basis with voltage last time, the voltage of increase is the 1-3 volt.
4. according to the method for the said elimination display of organic electroluminescence of claim 1 electric pole short circuit, it is characterized in that institute's making alive is up to direct current 30V between the adjacent top electrode of said this short circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105476745A CN102468449A (en) | 2010-11-17 | 2010-11-17 | Method for eliminating electrode short circuit of organic electroluminescent display |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105476745A CN102468449A (en) | 2010-11-17 | 2010-11-17 | Method for eliminating electrode short circuit of organic electroluminescent display |
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| CN102468449A true CN102468449A (en) | 2012-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105476745A Pending CN102468449A (en) | 2010-11-17 | 2010-11-17 | Method for eliminating electrode short circuit of organic electroluminescent display |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105988070A (en) * | 2015-02-04 | 2016-10-05 | 上海和辉光电有限公司 | Method of determining short circuit of negative and positive electrodes of organic light-emitting diode |
| CN112305449A (en) * | 2019-07-24 | 2021-02-02 | 苏州清越光电科技股份有限公司 | Light-emitting element defect detection jig and screen short circuit detection method |
-
2010
- 2010-11-17 CN CN2010105476745A patent/CN102468449A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105988070A (en) * | 2015-02-04 | 2016-10-05 | 上海和辉光电有限公司 | Method of determining short circuit of negative and positive electrodes of organic light-emitting diode |
| CN112305449A (en) * | 2019-07-24 | 2021-02-02 | 苏州清越光电科技股份有限公司 | Light-emitting element defect detection jig and screen short circuit detection method |
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Application publication date: 20120523 |