CN103956376A - OLED illumination panel and auxiliary electrode thereof - Google Patents
OLED illumination panel and auxiliary electrode thereof Download PDFInfo
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- CN103956376A CN103956376A CN201410175878.9A CN201410175878A CN103956376A CN 103956376 A CN103956376 A CN 103956376A CN 201410175878 A CN201410175878 A CN 201410175878A CN 103956376 A CN103956376 A CN 103956376A
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- auxiliary electrode
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- oled illumination
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Abstract
The invention discloses an OLED illumination panel. A cathode layer of the OLED illumination panel comprises strip-shaped electrodes distributed in parallel, and one ends of the electrodes are connected to form an E shape. The OLED illumination panel further comprises a reinforcing type auxiliary electrode layer located at the cathode layer and auxiliary electrode layers which are evenly distributed in parallel in a strip shape mode, are connected with an anode layer and extend into an EML light-emitting layer, and the reinforcing type auxiliary electrode layer extends towards the EML light-emitting layer to be connected with the auxiliary electrode layers. The OLED illumination panel has the advantage that after the structure is adopted, and the light emitted by the light-emitting layer can be transmitted out more through ITO. According to the device structure of the OLED illumination panel, the light emitted by the light-emitting layer can not be all transmitted out as the light is shielded by an auxiliary electrode. Due to the fact that the auxiliary electrode is of a strip-shaped structure, the opening rate is higher than that of an existing panel of a net structure, the brightness of the OLED illumination panel is higher under the same driving conditions, and the difference value of the maximum resistance drop and the minimum resistance drop of each point on the panel is reduced.
Description
Technical field
The invention belongs to OLED lighting technical field, relate to the luminous balancing technique of OLED illumination panel, be specifically related to a kind of OLED illumination panel and for improving the auxiliary electrode structure of its uniformity of luminance.
Background technology
OLED illumination has environment compatibility and can make area source, so attract tremendous attention as follow-on illuminating device.OLED illumination panel is by transparent anode ITO layer, and luminescent layer EML and aluminium (Al) cathode layer forms.Because transparent anode sheet resistance is larger, be about 10 Ω/, face plate center region resistance drop (IR-DROP) is serious, causes illumination panel to have obvious brightness irregularities phenomenon, and in large area lighting panel, the problem of brightness irregularities is particularly serious.
As shown in Figures 1 and 2, for improving the inhomogeneities of illumination panel brightness, existing technical scheme is to increase and be communicated with described transparent anode on transparent anode layer, and the auxiliary electrode chromium (Cr) that is netted that is interconnected between self.Because the sheet resistance of auxiliary electrode is less, be about 1 Ω/, face plate center region resistance drop reduces, and panel luminance uniformity is improved.But in the prior art, the auxiliary electrode of increase is the network structure being interconnected on transparent anode layer, its underpart is communicated with described transparent anode, and top is positioned at luminescent layer.Because auxiliary electrode is opaque, light can't pass, and therefore increases after auxiliary electrode, has reduced the aperture opening ratio of panel, and obtain identical brightness just needs larger drive current.
Summary of the invention
The object of the invention is for existing for solving OLED illumination panel because sheet resistance causes more greatly the problem of non-uniform light, proposed a kind of OLED illumination panel and for improving the auxiliary electrode structure of its uniformity of luminance.
Technical scheme of the present invention is: a kind of OLED illumination panel, comprise ito anode layer, EML luminescent layer and cathode layer, and it is characterized in that, described cathode layer comprises the strip shaped electric poles of parallel distribution, one end of electrode is connected and forms E font; Panel also comprises the enhancement mode auxiliary electrode layer and the equally distributed auxiliary electrode layer that is connected and stretches into EML luminescent layer with anode layer of parallel strip that are positioned at cathode layer, enhancement mode auxiliary electrode layer comprises the strip shaped electric poles of parallel distribution, one end of electrode is connected and forms E font, the E font opening direction also level crossing relative to cathode layer of enhancement mode auxiliary electrode layer, isolates by insulated column between enhancement mode auxiliary electrode layer and cathode layer; Described enhancement mode auxiliary electrode layer extends and connects as for auxiliary electrode layer to EML luminescent layer.
Further, described cathode layer is metallic aluminium.
The auxiliary electrode of OLED illumination panel, it is characterized in that, comprise the first auxiliary electrode being connected with ito anode and the second auxiliary electrode that is positioned at metallic cathode layer, described cathode layer comprises the strip shaped electric poles of parallel distribution, one end of electrode is connected and forms E font, the second auxiliary electrode shape is identical with cathode layer shape, and intersects and be arranged in parallel in opposite directions with cathode layer; The first auxiliary electrode shape is identical with the second auxiliary electrode shape, and extends to and be in contact with one another to EML luminescent layer from ito anode and cathode layer respectively; Between cathode layer and the second auxiliary electrode layer, isolate by insulated column.
Beneficial effect of the present invention: the one, adopt after this structure, the light that luminescent layer sends can be gone out by ITO transmission more.In OLED illumination panel device architecture, the light that luminescent layer sends all transmission is gone out, because will be stopped by auxiliary electrode.Because the auxiliary electrode of this fermentation is list structure, to be cancellated panel aperture opening ratio higher than existing, therefore, in the situation that drive condition is identical, adopts the brightness meeting of OLED illumination panel of the present invention higher.Difference on the 2nd, OLED illumination panel between maximum resistance pressure drop and the minimum resistance pressure drop of each point is dwindled.Like this, after OLED illumination panel powers on, the brightness difference that on panel, each point sends is also dwindled thereupon, therefore adopts the OLED illumination panel brightness uniformity of this invention better.The 3rd, along with the reduction of the resistance drop of each point on OLED illumination panel, the power consumption consuming on auxiliary resistance in the situation that drive current is identical must reduce, and whole like this panel power consumption also can reduce thereupon.And along with the reduction of panel power consumption, panel caloric value reduces, temperature rise when panel work and then reduces, and the aging meeting of OLED material slows down, and therefore the life-span of OLED illumination panel will extend.In manufacturing process, insulated column is processed into inverted trapezoidal shape (side being connected with ITO is little, and an other side is large), can also further strengthen above-mentioned effect.Therefore under identical drive condition, compared with adopting prior art, adopt that OLED illumination panel aperture opening ratio of the present invention is higher, brightness is higher and uniformity better, the life-span is longer, power consumption is lower, lower to the requirement of heat radiation.
Brief description of the drawings
Fig. 1 is the device architecture profile of existing OLED illumination panel;
Fig. 2 is the auxiliary electrode structure of OLED illumination panel shown in Fig. 1;
Fig. 3 is the profile of the device architecture of oled panel of the present invention;
Fig. 4 is the auxiliary electrode structure upward view of the oled panel shown in Fig. 3;
Fig. 5 is the vertical view of the oled panel shown in Fig. 3.
Embodiment
Following examples of the present invention are according to principle of the present invention and designing, and below in conjunction with accompanying drawing and specific embodiment, the invention will be further elaborated.
As shown in Fig. 3, Fig. 4 and Fig. 5, a kind of OLED illumination panel of the present embodiment, comprises ito anode layer, EML luminescent layer and cathode layer, and described cathode layer comprises the strip shaped electric poles of parallel distribution, and one end of electrode is connected and forms E font; Panel also comprises the enhancement mode auxiliary electrode layer and the equally distributed auxiliary electrode layer that is connected and stretches into EML luminescent layer with anode layer of parallel strip that are positioned at cathode layer, enhancement mode auxiliary electrode layer comprises the strip shaped electric poles of parallel distribution, one end of electrode is connected and forms E font, the E font opening direction also level crossing relative to cathode layer of enhancement mode auxiliary electrode layer, isolates by insulated column between enhancement mode auxiliary electrode layer and cathode layer; Described enhancement mode auxiliary electrode layer extends and connects as for auxiliary electrode layer to EML luminescent layer.Described cathode layer is metallic aluminium.
The present embodiment further provides the auxiliary electrode of OLED illumination panel, comprise the first auxiliary electrode being connected with ito anode and the second auxiliary electrode that is positioned at metallic cathode layer, described cathode layer comprises the strip shaped electric poles of parallel distribution, one end of electrode is connected and forms E font, the second auxiliary electrode shape is identical with cathode layer shape, and intersects and be arranged in parallel in opposite directions with cathode layer; The first auxiliary electrode shape is identical with the second auxiliary electrode shape, and extends to and be in contact with one another to EML luminescent layer from ito anode and cathode layer respectively; Between cathode layer and the second auxiliary electrode layer, isolate by insulated column.
As can be seen from Figure 3, illumination panel comprises enhancement mode auxiliary electrode (Al), metallic cathode (Al) and insulated column.Wherein enhancement mode auxiliary electrode is consistent with auxiliary electrode shape is also connected in a side, and metallic cathode is strip and is connected at offside, and enhancement mode auxiliary electrode is not connected with metallic cathode.
The illumination panel of the present embodiment provides a kind of novel auxiliary electrode structure for OLED illumination panel, to improve panel luminance uniformity and to reduce panel power consumption.The concrete Al by introducing low square resistance is as enhancement mode auxiliary electrode.Increased insulated column, insulated column is separated metal A l, and a part of Al does negative electrode, and another part is as the enhancement mode auxiliary electrode of transparent anode.Insulated column penetrates luminescent layer and is based upon above ITO, and the Al of enhancement mode auxiliary electrode is directly connected with auxiliary electrode Cr.As shown in Figure 4, different from existing netted auxiliary electrode structure, the auxiliary electrode of the present embodiment is list structure to the auxiliary electrode structure of the OLED illumination panel of the present embodiment, is only interconnected in a side.From metallic cathode layer (overlooking), the vertical view of the OLED device of the present embodiment as shown in Figure 5, be that metallic cathode is different entirely with existing this layer, in the present embodiment, this layer is divided into independently three parts, is respectively enhancement mode auxiliary electrode (Al), metallic cathode (Al), insulated column.Wherein enhancement mode auxiliary electrode is consistent with the auxiliary electrode shape above transparent anode, and width can be different, is also connected in a side, and metallic cathode is strip and is connected at offside, and enhancement mode auxiliary electrode and metallic cathode are isolated post and separate mutually and be not connected.
Because the sheet resistance of metal A l is more much smaller than Cr, be about 0.2 Ω/, therefore adopt above-mentioned enhancement mode auxiliary electrode structure, can effectively reduce the resistance drop of each point on OLED illumination panel.
Those of ordinary skill in the art will appreciate that, embodiment described here is in order to help reader understanding's principle of the present invention, should be understood to that protection scope of the present invention is not limited to such special statement and embodiment.Those of ordinary skill in the art can make various other various concrete distortion and combinations that do not depart from essence of the present invention according to these technology enlightenments disclosed by the invention, and these distortion and combination are still in protection scope of the present invention.
Claims (3)
1. an OLED illumination panel, comprises ito anode layer, EML luminescent layer and cathode layer, it is characterized in that, described cathode layer comprises the strip shaped electric poles of parallel distribution, and one end of electrode is connected and forms E font; Panel also comprises the enhancement mode auxiliary electrode layer and the equally distributed auxiliary electrode layer that is connected and stretches into EML luminescent layer with anode layer of parallel strip that are positioned at cathode layer, enhancement mode auxiliary electrode layer comprises the strip shaped electric poles of parallel distribution, one end of electrode is connected and forms E font, the E font opening direction also level crossing relative to cathode layer of enhancement mode auxiliary electrode layer, isolates by insulated column between enhancement mode auxiliary electrode layer and cathode layer; Described enhancement mode auxiliary electrode layer extends and connects as for auxiliary electrode layer to EML luminescent layer.
2. OLED illumination panel according to claim 1, is characterized in that, described cathode layer is metallic aluminium.
The auxiliary electrode of 3.OLED illumination panel, it is characterized in that, comprise the first auxiliary electrode being connected with ito anode and the second auxiliary electrode that is positioned at metallic cathode layer, described cathode layer comprises the strip shaped electric poles of parallel distribution, one end of electrode is connected and forms E font, the second auxiliary electrode shape is identical with cathode layer shape, and intersects and be arranged in parallel in opposite directions with cathode layer; The first auxiliary electrode shape is identical with the second auxiliary electrode shape, and extends to and be in contact with one another to EML luminescent layer from ito anode and cathode layer respectively; Between cathode layer and the second auxiliary electrode layer, isolate by insulated column.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410175878.9A CN103956376B (en) | 2014-04-28 | 2014-04-28 | A kind of OLED illumination panel and auxiliary electrode thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410175878.9A CN103956376B (en) | 2014-04-28 | 2014-04-28 | A kind of OLED illumination panel and auxiliary electrode thereof |
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| CN103956376A true CN103956376A (en) | 2014-07-30 |
| CN103956376B CN103956376B (en) | 2016-06-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107004695A (en) * | 2014-12-15 | 2017-08-01 | 乐金显示有限公司 | Organic light emitting apparatus |
| CN108767136A (en) * | 2018-06-05 | 2018-11-06 | 京东方科技集团股份有限公司 | A kind of minute surface display screen and preparation method |
| WO2019085509A1 (en) * | 2017-10-31 | 2019-05-09 | 云谷（固安）科技有限公司 | Display panel and terminal |
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| KR100740035B1 (en) * | 2005-10-18 | 2007-07-16 | 주식회사 대우일렉트로닉스 | Method for fabricating the electrode pattern of OLED display panel |
| CN101330131A (en) * | 2007-06-20 | 2008-12-24 | 中国南玻集团股份有限公司 | Organic electroluminescent display device, transparent conductive film substrate and preparation method |
| CN101968948A (en) * | 2010-09-20 | 2011-02-09 | 四川虹视显示技术有限公司 | Auxiliary electrode structure for organic light emitting diode (OLED) illuminating panel |
| CN102034852A (en) * | 2010-10-26 | 2011-04-27 | 四川虹视显示技术有限公司 | OLED (Organic Light Emitting Diode) illumination panel |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100740035B1 (en) * | 2005-10-18 | 2007-07-16 | 주식회사 대우일렉트로닉스 | Method for fabricating the electrode pattern of OLED display panel |
| CN101330131A (en) * | 2007-06-20 | 2008-12-24 | 中国南玻集团股份有限公司 | Organic electroluminescent display device, transparent conductive film substrate and preparation method |
| CN101968948A (en) * | 2010-09-20 | 2011-02-09 | 四川虹视显示技术有限公司 | Auxiliary electrode structure for organic light emitting diode (OLED) illuminating panel |
| CN102034852A (en) * | 2010-10-26 | 2011-04-27 | 四川虹视显示技术有限公司 | OLED (Organic Light Emitting Diode) illumination panel |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107004695A (en) * | 2014-12-15 | 2017-08-01 | 乐金显示有限公司 | Organic light emitting apparatus |
| CN107004695B (en) * | 2014-12-15 | 2020-12-08 | 乐金显示有限公司 | Organic light emitting device |
| WO2019085509A1 (en) * | 2017-10-31 | 2019-05-09 | 云谷（固安）科技有限公司 | Display panel and terminal |
| CN108767136A (en) * | 2018-06-05 | 2018-11-06 | 京东方科技集团股份有限公司 | A kind of minute surface display screen and preparation method |
| US11258034B2 (en) | 2018-06-05 | 2022-02-22 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Display panel and producing method therefor, vehicle-mounted rearview mirror, and display device |
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| CN103956376B (en) | 2016-06-22 |
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