CN103839974B - WOLED, WOLED preparation method and WOLED driving method - Google Patents
WOLED, WOLED preparation method and WOLED driving method Download PDFInfo
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- CN103839974B CN103839974B CN201410091214.4A CN201410091214A CN103839974B CN 103839974 B CN103839974 B CN 103839974B CN 201410091214 A CN201410091214 A CN 201410091214A CN 103839974 B CN103839974 B CN 103839974B
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Abstract
WOLED of the present invention comprises multiple luminescence units that M*N matrix is arranged, M and N are respectively line number and the columns of matrix, luminescence unit comprises negative electrode and anode, the negative electrode of the luminescence unit of the capable n row of m in matrix, the simultaneously anode of two luminescence units of the capable n row of the m-1 in connection matrix and the capable n+1 row of m; M is not less than 2 positive integers that are not more than M, and n is the positive integer that is not more than N-1; Anode from the 1st M the luminescence unit being listed as is drawn respectively M array anode electrode, and the negative electrode of M the luminescence unit being listed as from N is drawn respectively M matrix cathode electrode. Beneficial effect: realized the homogeneity of each luminescence unit power supply, improved the uniformity coefficient of panel luminance. By adopting driving method of the present invention to make WOLED of the present invention not have influence on the normal work of all the other luminescence units because of the damage of part luminescence unit in uniformly light-emitting.
Description
Technical field
The invention belongs to illuminated by surface light source technical field, relate to WOLED lighting engineering, particularly a kind of for throwing light onWOLED, and relate to WOLED preparation method and WOLED driving method.
Background technology
WOLED(WhiteOrganicLightEmittingDiode, white organic LED) be illumination of new generationDevice, it,, by luminous organic material being clipped between transparent anode and metallic cathode, applies voltage to organic film and carries outLuminous.
The glass substrate that existing WOLED adopts generally need to first be coated with transparent anode film, such as ITO or IZO etc.,Then on transparent anode film, also need to be coated with again the auxiliary electrode film that low-resistance metal material is made, be used for reducingVoltage difference between the upper each luminescence unit of WOLED, thus whole WOLED uniformity of luminance ensured. WOLED'sBefore organic material evaporation, need to pass through third photo etching operation (auxiliary electrode photoetching, transparent anode photoetching, insulating barrier photoetching)Form the luminescence unit of particular design, in order to improve to greatest extent the luminous efficiency of brightness uniformity and whole WOLED,Transparent anode between luminescence unit is that entirety is interconnected.
If Fig. 1 is common WOLED panel pattern: an anode contact 2, left and right two are respectively drawn in the upper and lower both sides of illumination panelSide is respectively drawn a cathode contact 1, and electric current is from the anode of the upper and lower both sides of WOLED panel, by WOLED light-emitting area 3,Flow to the negative electrode of the WOLED panel left and right sides, in WOLED light-emitting area 3, be covered with honey comb like auxiliary electrode pattern,Be used for improving the CURRENT DISTRIBUTION uniformity in light-emitting area, thereby improve the luminosity uniformity of whole WOLED. OLEDMetallic cathode evaporation region 4 whole light-emitting area is covered, be connected with cathode contact 1 simultaneously.
Common WOLED panel comprises glass substrate, transparent anode film, auxiliary electrode film, insulating layer of thin-film, organicMaterial film and metallic cathode film.
Summary of the invention
The object of the invention is in order to simplify existing WOLED production process, improve the brightness uniformity of illumination panel, carryA kind of WOLED, WOLED preparation method and WOLED driving method are gone out.
Technical scheme of the present invention is: WOLED, it is characterized in that, comprise multiple luminescence units that M*N matrix is arranged, M andN is respectively line number and the columns of matrix, and luminescence unit comprises negative electrode and anode, the luminescence unit of the capable n row of m in matrixNegative electrode, the anode of two luminescence units that simultaneously the capable n row of the m-1 in connection matrix and the capable n+1 of m are listed as; M isBe not less than 2 positive integers that are not more than M, n is the positive integer that is not more than N-1; Anode from the 1st M the luminescence unit being listed as dividesDo not draw M array anode electrode, the negative electrode of M the luminescence unit being listed as from N is drawn respectively M matrix cathode electrode.
Further, between the anode that each luminescence unit need to connect and negative electrode, connect by contact hole.
Further, the luminescence unit that matrix is arranged adopts photo-mask process isolation and forms.
WOLED preparation method, is characterized in that, process transparent anode photoetching and insulating barrier photoetching twice before evaporation organic materialPhoto-mask process, the auxiliary electrode film that on glass substrate, nothing is coated with.
Further, described WOLED preparation method also comprises step: adopt photo-mask process that light-emitting zone is divided into the row of proofThe luminescence unit of row.
WOLED driving method, is characterized in that, in matrix with array anode electrode corresponding to a line luminescence unit and matrix negative electrodeElectrode voltage is poor be single luminescence unit operating voltage N doubly; The array anode electrode that the capable luminescence unit of m is corresponding and matrix negative electrodeThe current potential of electrode respectively than array anode electrode corresponding to the capable luminescence unit of m-1 and matrix cathode electrode current potential exceed one luminousCell operation voltage.
Beneficial effect of the present invention: the luminous list that WOLED of the present invention arranges by light-emitting zone being divided into multiple matrixesUnit, and adopt series-parallel system to connect each luminescence unit, realize the homogeneity of each luminescence unit power supply, improve panel brightThe uniformity coefficient of degree. Meanwhile, the WOLED production process of this kind of structure is simplified, and has saved the auxiliary electrical of common WOLEDThe utmost point and concerned process steps. By adopt driving method of the present invention make WOLED of the present invention in uniformly light-emitting not because ofThe damage of part luminescence unit and have influence on the normal work of all the other luminescence units.
Brief description of the drawings
Fig. 1 is existing WOLED structural representation;
Fig. 2 is the WOLED structural representation of the embodiment of the present invention;
Fig. 3 is the equivalent circuit diagram of the WOLED luminescence unit of the embodiment of the present invention.
Detailed description of the invention
Following examples of the present invention are to design according to principle of the present invention, below in conjunction with accompanying drawing and following specific embodimentThe invention will be further elaborated.
As shown in Figures 2 and 3, the WOLED of the present embodiment, comprises multiple luminescence units 7 that M*N matrix is arranged, M and NBe respectively line number and the columns of matrix, luminescence unit comprises anode 5 and negative electrode 6, the luminous list of the capable n row of m in matrixThe negative electrode of unit, the simultaneously anode of two luminescence units of the capable n row of the m-1 in connection matrix and the capable n+1 row of m; mFor being not less than 2 positive integers that are not more than M, n is the positive integer that is not more than N-1; From the anode of the 1st M the luminescence unit being listed asDraw respectively M array anode electrode, the negative electrode of M the luminescence unit being listed as from N is drawn respectively M matrix cathode electrode.Between the anode 8 that each luminescence unit need to connect and negative electrode, connect by contact hole 9. Concrete, the luminous list that matrix is arrangedUnit adopts photo-mask process isolation and forms.
The preparation method of above-mentioned WOLED, is from traditional the different of WOLED preparation method, warp before evaporation organic materialCross transparent anode photoetching and insulating barrier photoetching twice photo-mask process, the auxiliary electrode film that on glass substrate, nothing is coated with. Due to nothingNeed be coated with auxiliary electrode film, production process is simplified more, is conducive to reduce production costs.
The WOLED of the present embodiment, in manufacturing process, also comprises that step adopts photo-mask process that light-emitting zone is divided into the row of proofThe luminescence unit of row.
In order to adapt to evenly lighting of above-mentioned WOLED, the present embodiment provides the driving method of a kind of above-mentioned WOLED, concreteTo be single luminescence unit work with array anode electrode corresponding to a line luminescence unit and matrix cathode electrode voltage difference in matrixMake the N of voltage doubly; The array anode electrode that the capable luminescence unit of m is corresponding and the current potential of matrix cathode electrode are more luminous than m-1 row respectivelyThe array anode electrode that unit is corresponding and matrix cathode electrode current potential exceed a luminescence unit operating voltage.
That the WOLED of the present embodiment makes is simple, with low cost, reliability is high and good uniformity. Compare common WOLED,Cancel auxiliary electrode, cancelled the photo-mask process that forms auxiliary electrode pattern, on glass substrate, formed each by photoetchingIndependent luminous pixel cell, utilizes series and parallel interconnection between anode and negative electrode between each pixel cell.
Owing to need to not be coated with auxiliary electrode film on glass substrate, do not need corresponding auxiliary electrode pattern photo-mask process yet,Thereby greatly simplify the production process of WOLED substrate; Simultaneously the present invention also by the luminescence unit on WOLED mutually itBetween isolate, and mix by series, parallel the mode connecting WOLED driven, realized wherein 1 and sent outWhen light unit goes wrong, other luminescence units still can normally be lit a lamp, and have improved the reliability of WOLED; AndAnd the upper each luminescence unit of WOLED of the present invention has independently voltage to supply with, and has ensured that the brightness between each luminescence unit is equalEven property.
The WOLED of the luminescence unit of arranging taking 4X4 matrix is below principle of the present invention as example elaborates:
It is luminous that first the WOLED of the present embodiment becomes the sub-light-emitting zone (luminescence unit) of separate type by optical graving and be positioned at sonContact hole between region, sub-light-emitting zone forms the array distribution of 4X4; 4 anodes are drawn respectively on the WOLED panel left side51,52,53 and 54,4 negative electrodes 61,62,63 and 64 are drawn respectively on the right. After in Fig. 2, solid box part is photoetchingForm transparent anode pattern, dotted line frame is the metallic cathode evaporation region of WOLED, between each sub-light-emitting zone by transparent sunThe utmost point and metallic cathode interconnect by contact hole 9.
This equivalent circuit diagram has been enumerated the series connection/principle of parallel of 4 × 4 WOLED luminescence units, if each WOLEDLuminescence unit needs voltage difference 5V to drive, so can by add respectively at anode contact point 51,52,53 and 54 20V,The voltage of 25V, 30V, 35V, adds respectively 0V, 5V, 10V, 15V at negative electrode contact point 61,62,63 and 64 simultaneouslyVoltage realize the driving of 16 WOLED luminescence units, if can realize when 16 sub-luminescence units one of themThe short circuit existing because WOLED is inner or open circuit badly, cannot be luminous time, can not have influence on other 15 sons and send outLight unit luminous.
Those of ordinary skill in the art will appreciate that, embodiment described here is in order to help reader understanding of the present inventionPrinciple, should be understood to that protection scope of the present invention is not limited to such special statement and embodiment. This area commonIt is various concrete that technical staff can make various other of essence of the present invention of not departing from according to these technology enlightenment disclosed by the inventionDistortion and combination, these distortion and combination are still in protection scope of the present invention.
Claims (4)
1.WOLED, comprises multiple luminescence units that M*N matrix is arranged, and M and N are respectively line number and the columns of matrix,Luminescence unit comprises negative electrode and anode, the negative electrode of the luminescence unit of the capable n row of m in matrix, in while connection matrixThe anode of two luminescence units of the capable n row of m-1 and the capable n+1 row of m; M is not less than 2 to be not more than the just whole of MNumber, n is the positive integer that is not more than N-1; Anode from the 1st M the luminescence unit being listed as is drawn respectively M array anode electricityThe utmost point, the negative electrode of M the luminescence unit being listed as from N is drawn respectively M matrix cathode electrode.
2. WOLED according to claim 1, is characterized in that, the anode that each luminescence unit need to connect and negative electrodeBetween connect by contact hole.
3. WOLED according to claim 1, is characterized in that, the luminescence unit that matrix is arranged adopts photo-mask processIsolate and form.
4.WOLED driving method, is characterized in that, in matrix with a line luminescence unit corresponding array anode electrode and squareBattle array cathode electrode voltage difference is N times of single luminescence unit operating voltage; Array anode electrode corresponding to the capable luminescence unit of m andThe current potential of matrix cathode electrode exceeds than array anode electrode corresponding to the capable luminescence unit of m-1 and matrix cathode electrode current potential respectivelyA luminescence unit operating voltage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410091214.4A CN103839974B (en) | 2014-03-12 | 2014-03-12 | WOLED, WOLED preparation method and WOLED driving method |
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| CN201410091214.4A CN103839974B (en) | 2014-03-12 | 2014-03-12 | WOLED, WOLED preparation method and WOLED driving method |
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| CN103839974A CN103839974A (en) | 2014-06-04 |
| CN103839974B true CN103839974B (en) | 2016-05-25 |
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| CN111768718A (en) * | 2020-07-13 | 2020-10-13 | 深圳市华星光电半导体显示技术有限公司 | LED display substrate and display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101217185A (en) * | 2007-01-04 | 2008-07-09 | 三星Sdi株式会社 | Organic light emitting diode display device and method of fabricating the same |
| CN201391845Y (en) * | 2009-03-31 | 2010-01-27 | 重庆卓晖照明有限公司 | LED circuit and LED illuminating device with same |
| CN202587470U (en) * | 2012-02-22 | 2012-12-05 | 安徽科发信息科技有限公司 | LED array circuit |
| CN103268921A (en) * | 2012-12-31 | 2013-08-28 | 上海天马微电子有限公司 | Method for manufacturing WOLED (White Organic Light Emitting Diode), WOLED and display equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6822629B2 (en) * | 2000-08-18 | 2004-11-23 | Semiconductor Energy Laboratory Co., Ltd. | Light emitting device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101217185A (en) * | 2007-01-04 | 2008-07-09 | 三星Sdi株式会社 | Organic light emitting diode display device and method of fabricating the same |
| CN201391845Y (en) * | 2009-03-31 | 2010-01-27 | 重庆卓晖照明有限公司 | LED circuit and LED illuminating device with same |
| CN202587470U (en) * | 2012-02-22 | 2012-12-05 | 安徽科发信息科技有限公司 | LED array circuit |
| CN103268921A (en) * | 2012-12-31 | 2013-08-28 | 上海天马微电子有限公司 | Method for manufacturing WOLED (White Organic Light Emitting Diode), WOLED and display equipment |
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