CN1499903A - Organic active display possessing reflected layer - Google Patents
Organic active display possessing reflected layer Download PDFInfo
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- CN1499903A CN1499903A CNA021499799A CN02149979A CN1499903A CN 1499903 A CN1499903 A CN 1499903A CN A021499799 A CNA021499799 A CN A021499799A CN 02149979 A CN02149979 A CN 02149979A CN 1499903 A CN1499903 A CN 1499903A
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- emitting display
- light emitting
- layer
- organic light
- reflector
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Abstract
Reflected layer, anode, organic layer and transparent cathode are formed on base plate in sequence. When a voltage through the anode and cathode is applied to organic luminescence display, the organic layer radiates light. The reflected layer reflects light emitted from the organic layer towards direction of the transparent cathode. Thus, light emitted from the organic layer is sent out from direction of the transparent cathode so as to raise luminous efficiency of organic active display.
Description
Technical field
The present invention relates to active display, relate in particular to the enhancement of the luminous efficiency of organic light emitting display.
Background technology
Along with the maturation day by day of technology, organic light emitting display has become one of trend of display of future generation.General organic light emitting display is metallic cathode and transparent anode, the structure of sandwich organic layer.The material of metallic cathode is generally the metal than low work function, constitutes as magnesium, aluminium or its alloy, and the material of transparent anode then is stannize indium oxide or zincizing indium oxide.When organic layer was given out light, light was emitted by transparent anode, was called the bottom and gave out light.
For organic light emitting display is used for display, the circuit of control must be set below anode, for example use the active design of drive circuit of thin-film transistor.Thus, can reduce the given out light area of giving out light from transparent anode.Therefore, the someone proposes to allow light emit from transparent cathode the top that negative electrode the is made light-permeable structure of giving out light.Please refer to Fig. 1, is the schematic diagram of the organic light emitting display of active drive circuit.Organic layer 106 is sandwiched between transparent anode 108 and the transparent cathode 104.Cap layer 102 is arranged on the transparent cathode 104 with protection transparent cathode 104.Transparent anode 108 is connected with thin-film transistor 306 by electrically connecting assembly 308.Control giving out light of organic layer 106 via thin-film transistor 306.
Yet giving out light of organic layer is direction-freely to all the winds to give out light, when the direction of giving out light is not during towards transparent cathode, can consumed energy, and can not increase the brightness of organic light emitting display again.Therefore how increasing luminous efficiency, is the factor of required consideration when making organic light emitting display.
Summary of the invention
The objective of the invention is to promote the luminous efficiency of organic light emitting display.
A kind of top with reflector organic light emitting display of giving out light comprises substrate.On substrate, form reflector, anode, organic layer and transparent cathode successively.When a voltage put on organic light emitting display via negative electrode and anode, organic layer was given out light.The light that the reflector emits toward the direction of transparent cathode reflection organic layer makes the direction of giving out light by transparent cathode of organic layer penetrate.
Description of drawings
Fig. 1 is the schematic diagram of organic light emitting display of the prior art;
Fig. 2 is the schematic diagram of the organic light emitting display in one embodiment of the invention;
Fig. 3 is the schematic diagram of the organic light emitting display in the another embodiment of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
The invention provides a kind of organic light emitting display, can promote the efficient of giving out light.The reflector is set, with the past transparent cathode direction reflection of the light of organic layer, to promote giving out light in the transparent cathode direction below transparent anode.
Please refer to Fig. 2, is in one embodiment of the invention, the schematic diagram of organic light emitting display.Organic layer 406 is clipped between transparent cathode 404 and the transparent anode 408.The material of transparent cathode 404 can be sheet metal, constitutes as magnesium, aluminium or its alloy, perhaps other organic compound transparent and low work function.The material of anode 408 is stannize indium oxide or zincizing indium oxide, is transparent material.Organic layer 406 can be sandwich construction, and the organic layer of multilayer can have functions such as electron transfer layer, luminescent layer and electric hole transfer layer respectively.Cap layer 402 protection transparent cathodes 404 can be set on the transparent cathode 404.Have thin-film transistor 306 on the base material 302, be used to control giving out light of organic light emitting display.After covering flatness layer 202 on the base material 302, thin-film transistor 306 is via electrically connecting assembly 308 and anode 408 bindings.
Please continue with reference to figure 2, giving out light not of organic layer 406 can be towards specific direction, and the material of anode 408 is transparent materials such as stannize indium oxide or zincizing indium oxide.One first reflector 410 is set below anode 408, can giving out light with organic layer 406 toward the direction reflection of transparent cathode 404, as shown by arrows.First reflector 410 is by highly reflective material, forms as materials such as silver.Thus, giving out light of most of organic layer 406 all can be emitted via transparent cathode, increases the luminous efficiency of organic light emitting display.In processing procedure, first reflector 410 and anode 408 can form simultaneously, can not increase needed light shield number in the processing procedure.
According to the feature of giving out light of organic light emitting display, the contact between the anode 408 and first reflector 410 can be the plane, as shown in Figure 2.If the different demands of having given out light of organic light emitting display, the contact-making surface in anode 408 and reflector can be wavy surface, as shown in Figure 3.Organic light emitting display and Fig. 2 of Fig. 3 are similar, and it is wavy surface that difference is in the contact-making surface of second reflector 412 and anode 408, produce the reflecting effect different with plane surface.
The above is preferred embodiment of the present invention and design, this embodiment and design only illustrate, be not to be used to limit the scope of the invention, all with the technological means that is equal to or any distortion in the scope that claim was contained, all do not break away from interest field of the present invention and category thereof.
The element numbers explanation
102 cap layers, 104 transparent cathodes
106 organic layers, 108 anodes
202 flatness layers, 302 base materials
306 thin-film transistors 308 electrically connect assembly
402 cap layers, 404 transparent cathodes
406 organic layers, 408 anodes
412 second reflector, 410 first reflector
Claims (8)
1. an organic light emitting display of giving out light in the top with reflector is characterized in that, comprises:
One substrate;
One reflector is arranged on the described substrate;
One anode is arranged on the described reflector;
One organic layer is arranged on the described anode;
One transparent cathode is arranged on the described organic layer;
Wherein, when a voltage puts on described organic light emitting display via described transparent cathode and described anode, described organic layer is given out light, and the light that described organic layer is emitted is reflected toward the direction of described transparent cathode in described reflector, makes giving out light of described organic layer penetrate toward the direction of described transparent cathode.
2. organic light emitting display as claimed in claim 1, it is further characterized in that the material in described reflector is to be selected by following material: aluminium, silver and alloy thereof.
3. organic light emitting display as claimed in claim 1, it is further characterized in that the contact-making surface of described reflector and described anode is a plane.
4. organic light emitting display as claimed in claim 1, it is further characterized in that the contact-making surface of described reflector and described anode is a wavy surface.
5. organic light emitting display as claimed in claim 1, it is further characterized in that described organic layer is made up of number stratification compound layer, described several stratification compound layer comprise electron transfer layer, electric hole transfer layer and luminescent layer.
6. organic light emitting display as claimed in claim 1, it is further characterized in that, comprises a control switch, between described substrate and reflector, described control switch and described anode electrically connect, to control giving out light of described organic light emitting display.
7. organic light emitting display as claimed in claim 6, it is further characterized in that described control switch is a thin-film transistor.
8. organic light emitting display as claimed in claim 1, it is further characterized in that, comprises a cap layer on described transparent cathode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021499799A CN1499903A (en) | 2002-11-05 | 2002-11-05 | Organic active display possessing reflected layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021499799A CN1499903A (en) | 2002-11-05 | 2002-11-05 | Organic active display possessing reflected layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1499903A true CN1499903A (en) | 2004-05-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021499799A Pending CN1499903A (en) | 2002-11-05 | 2002-11-05 | Organic active display possessing reflected layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1499903A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7741640B2 (en) | 2004-03-11 | 2010-06-22 | Samsung Mobile Display Co., Ltd. | Top-emission organic light-emitting display device |
-
2002
- 2002-11-05 CN CNA021499799A patent/CN1499903A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7741640B2 (en) | 2004-03-11 | 2010-06-22 | Samsung Mobile Display Co., Ltd. | Top-emission organic light-emitting display device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |