CN1979914A - High-contrast organic luminous display - Google Patents
High-contrast organic luminous display Download PDFInfo
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- CN1979914A CN1979914A CN 200510129763 CN200510129763A CN1979914A CN 1979914 A CN1979914 A CN 1979914A CN 200510129763 CN200510129763 CN 200510129763 CN 200510129763 A CN200510129763 A CN 200510129763A CN 1979914 A CN1979914 A CN 1979914A
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- emitting display
- light emitting
- organic light
- contrast organic
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Abstract
The display unit includes transparent base plate, radiation structure, cover glass plate, and light absorption layer. Being setup on surface of the cover glass plate, the light absorption layer is in use for absorbing external light in order to reduce its reflection. The display also includes sealing material setup between the transparent base plate and the cover glass plate. Based on thickness of radiation structure and thickness of light absorption layer, the sealing material adjusts space between the transparent base plate and the cover glass plate.
Description
Technical field
The present invention especially is provided with light absorbing zone to reduce the organic light emitting display of external light source reflection about a kind of surface at cover-plate glass about a kind of high contrast organic light emitting display.
Background technology
Organic light emitting display (Organic Light Emitting Display, OLED) since have high brightness, wide viewing angle, self-luminous, flexibility, can full-colorization, high reaction speed, low operating voltage, thin-film component is simple in structure and the operating environment temperature range is big, can be made in the first-class advantage of any substrate even plastic substrate, though start late, but in the market of flat-panel screens, especially in, the small size portable displayer attracted attention in the field.
See also the 1st figure, bottom-emission (bottom emission) organic light emitting display 100 includes transparency carrier 110, be formed with hole injection layer (hole-injecting layer on it in regular turn, HIL) 120, organic cavity transmission layer (organic hole-transporting layer, HTL) 130, organic luminous layer (organicemitting layer) 140, organic electron transport layer (organic electron-transporting layer) 150 and metallic cathode 160, and transparency carrier 110 is airtight with cover-plate glass (coverglass) 180 by encapsulant 170.When extraneous light during by transparency carrier 110 incidents, have part light and reflected by metallic cathode 160, therefore all the other light that penetrate then can be caused the contrast of organic light emitting display 100 to reduce by other retes or cover-plate glass 180 reflected back incident ends.And be to reduce extraneous reflection of light, existing known technology has disclosed in these retes light absorbing elements has been set, as United States Patent (USP) the 6th, 750, the black negative electrode (black cathode) that No. 609 the 1st figure to the 4 figure are disclosed, insert conductivity light absorbing zone (electrically conductive light absorbing layer) in metallic cathode or anode, zinc oxide for example is in order to absorb the ambient light of incident.In addition, and for example United States Patent (USP) the 6th, 411, the optical interference element (optical interference member) that No. 019 the 1st figure and the 2nd figure are disclosed, in between organic luminous layer and the metallic cathode or the film that plates the multilayer different refractivity between anode and the organic luminous layer as the optical interference element, and making the ambient light of reflection produce the phase differences of 180 degree by the thickness of adjusting above-mentioned film, the interference of damaging property is to reduce the ambient light of reflection.
Yet, adopt black negative electrode or optical interference element no matter be, all be that it is arranged in the middle of negative electrode or the anode, or be arranged between organic luminous layer and metallic cathode or the anode, so the conductivity of material must be the key factor of its consideration, if selected material conductivity is not good, may causes the driving voltage of element to increase, and then influence the I-E characteristic of element and luminous power.In addition, utilize film, except that considering material conductivity, also must consider to increase each thin layer refractive index again as the optical interference element.In addition, above-mentioned setting has influenced the optimization structure of organic film all, thereby influences the stability and the efficient of light-emitting component.On the other hand, for not influencing the optimization of organic film, the combination of use polaroid (polarizer) and polarizer (retardation film) is also arranged at present, yet these two kinds of optical films combinations have higher cost comparatively speaking, and increased the complexity of technology.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of high contrast organic light emitting display, light absorbing zone (optical-absorption layer) is set, outside ray structure (emission structure) with effective increase contrast.
According to of the present invention, a kind of high contrast organic light emitting display is provided, the light absorbing zone that includes transparency carrier, ray structure, cover-plate glass in regular turn and be located at the surface of this cover-plate glass is in order to absorb ambient light to reduce its reflection.In addition, according to the present invention, other provides a kind of high contrast organic light emitting display, includes transparency carrier, ray structure and light absorption cover plate in regular turn, in order to absorb ambient light to reduce its reflection.
Compare with known technology, the present invention utilizes light absorbing zone or light absorption cover-plate glass, as the means that reduce the ambient light reflection.And, therefore can avoid having influence on the characteristic of organic film in the ray structure, and keep its optimized state because light absorbing zone or light absorption cover-plate glass all are arranged at outside the ray structure; Also can on technology, save the step of integrating each organic film and light absorbing elements.
Description of drawings
The 1st figure is the schematic diagram of known organic light emitting display.
The 2nd figure is the schematic diagram of the height contrast organic light emitting display of first preferred embodiment of the invention.
The 3rd figure is the schematic diagram of the height contrast organic light emitting display of second preferred embodiment of the invention.
The 4th figure is the schematic diagram of the height contrast organic light emitting display of third preferred embodiment of the invention.
100 organic light emitting display, 110 transparency carriers
120 hole input layers, 130 organic cavity transmission layer
140 organic luminous layers, 150 organic electron transport layers
160 metallic cathodes, 170 encapsulants
180 cover-plate glass
200,300,400 high contrast organic light emitting display
210,310,410 transparency carriers
220,320,420 ray structures
222,322,422 transparent bottom electrodes
224,324,424 organic layers
226,326,426 upper electrode arrangement
2261,3261,4,261 half penetrating metal layers
2262, the resilient coating of 3262,4262 selectivity
2263,3263,4263 transparency conducting layers
230,330 cover-plate glass, 240,340 light absorbing zones, 430 light absorption cover plates
250,350,450 encapsulants, 260,360 polaroids
270,370,470 moisture absorption layers
Embodiment
See also the 2nd figure, the 2nd figure is the schematic diagram of the height contrast organic light emitting display of first preferred embodiment provided by the present invention.According to a first advantageous embodiment of the invention, high contrast organic light emitting display 200, include transparency carrier 210, for example glass substrate, quartz base plate or polyacrylate (polyacrylates) substrate, polymethacrylates (polymethacrylates) substrate etc. are in order to carrying ray structure 220.Ray structure 220 includes transparent bottom electrode 222, organic layer 224 and upper electrode arrangement 226.Wherein, the material of transparent bottom electrode 222 can be selected from indium tin oxide (Indium Tin Oxide, ITO), (Indium Zinc Oxide IZO) waits material to indium-zinc oxide, as the anode electrode in input hole.Organic layer 224 is luminescent layer in the present embodiment, it can be by polyphenylenevinylenes, polyfluorenes, polyphenyl alkene (polyphenylenes), diphenyl ethylene derivatives (stilbene derivatives), contain the copolymer (copolymer containing fluorenes) or the micromolecule luminescent material of fluorenes, for example tris (8-hydroxyquinolinate) aluminum (AlQ3), bis (8-hydroxyquinolato)-(4-phenylphenolato) aluminum (BAlq) etc. form, but are not limited thereto.Organic layer 224 also can comprise other organic films, for example organic cavity transmission layer, organic electron transport layer etc. in addition.Upper electrode arrangement 226 then includes half penetrating metal layer 2261, resilient coating 2262 and in order to the transparency conducting layer 2263 of the electrical conductivity that promotes half penetrating metal layer 2261 optionally in regular turn.Wherein, optionally resilient coating 2262, lithium fluoride (LiF) film for example, the required setting of visual ray structure 220 film layer structures, the injury that double penetrating metal layer 2261 caused during in order to buffering growth transparency conducting layer 2263; Also can be arranged between half penetrating metal layer 2261 and the organic layer 224, in order to reduce the anti-resistance that electronics injects, to promote the input of electronics.Organic light emitting display 200 includes cover-plate glass 230 in addition, and cover-plate glass 230 then is formed with light absorbing zone 240 in the face of the surface of transparency carrier 210.
It should be noted that, the material of light absorbing zone 240 can be light absorption hygroscopic material, monochromatic filter, colored filter, carbon black (carbon black), calcium boride (CaB6), covellite (CuPC) or melanin material (black pigment material), for example Bis (1,8-Naphthimidazo) perinon etc. utilizes stickup, rotary coating or thin film technique to be formed at the surface of cover-plate glass 230.When extraneous light was incident in ray structure 220 by transparency carrier 210, the extraneous light of incident then can be absorbed by light absorbing zone 240, therefore reduced the reflectivity of extraneous light and the contrast of raising organic light emitting display 200.
In addition, the height contrast organic light emitting display 200 that present embodiment provided also can comprise polaroid 260, it is arranged at the surface of cover-plate glass 230 relative transparency carriers 210, or as being arranged at surface in the present embodiment in the face of transparency carrier 210, in order to light absorbing zone 240 combination, and can further lower extraneous reflection of light.In addition, because half penetrating metal layer 2261 uses the metal of low work function (workfunction) usually, for example magnesium, calcium or composition metal, for example magnesium/silver alloy (Mg/Ag), aluminium/lithium (Al/Li) alloy, yet low workfunction metal relatively activity is also bigger, produce oxidation, the destruction of causing negative electrode with aqueous vapor easily.Therefore the height contrast organic light emitting display 200 that present embodiment provided can also form moisture absorption layer 270 in the inboard of light absorbing zone 240 or light absorbing zone 240 and the combination of polaroid 260, perhaps the material of light absorbing zone 240 is directly selected the light absorption hygroscopic material for use, to guarantee the stability of ray structure 220.
High contrast organic light emitting display 200 provided by the present invention also includes encapsulant (sealingmaterial) 250, is arranged between transparency carrier 210 and the cover-plate glass 230.Encapsulant 250 can be UV glue (UV glue), its thickness is adjusted with the thickness of polaroid 260 combinations and the thickness of ray structure 220 according to the thickness or the light absorbing zone 240 of light absorbing zone 240, in order to the spacing of control transparency carrier 210 with cover-plate glass 230.
Please refer to the 3rd figure, the 3rd figure is the schematic diagram of the height contrast organic light emitting display of second preferred embodiment of the invention.According to this second preferred embodiment, high contrast organic light emitting display 300 includes transparency carrier 310, in order to carrying ray structure 320.Ray structure 320 includes transparent bottom electrode 322, organic layer 324 and upper electrode arrangement 326.The organic layer 324 of present embodiment also is luminescent layer; Right organic layer 324 also can comprise other organic films, for example organic cavity transmission layer, organic electron transport layer etc.Upper electrode arrangement 326 then includes half penetrating metal layer 3261, optionally resilient coating 3262 and transparency conducting layer 3263 in regular turn.Organic light emitting display 300 includes cover-plate glass 330 in addition, and cover-plate glass 330 then is formed with light absorbing zone 340 with respect to another surface of transparency carrier, absorbs the extraneous light of incident, reduces its reflectivity, and improves the contrast of organic light emitting display 300.
In addition, the height contrast organic light emitting display 300 that present embodiment provided also can comprise polaroid 360, be arranged at the surface of cover-plate glass 330 in the face of transparency carrier 310, or as being arranged at another surface of relative transparency carrier 310 in the present embodiment, in order to light absorbing zone 340 combination, and can further lower extraneous reflection of light.And the encapsulant 350 that the height that present embodiment provided contrast organic light emitting display 300 also includes is arranged between transparency carrier 310 and the cover-plate glass 330.Encapsulant 350 can be UV glue, and its thickness can be according to the thickness adjustment of required ray structure 320, with control transparency carrier 310 and 330 required distances of cover-plate glass.
It should be noted that, according to this second preferred embodiment, because light absorbing zone 340 or light absorbing zone 340 are arranged at the surface of cover-plate glass 330 with respect to transparency carrier 310 with the combination of polaroid 360, so only need consider the thickness of ray structure 320 between transparency carrier 310 and the cover-plate glass 330 apart from design.
In addition, because half penetrating metal layer 3261 uses the metal of low work function usually, its easy and aqueous vapor generation oxidation, cause the destruction of negative electrode, therefore the height contrast organic light emitting display 300 that present embodiment provided also can be in the surface formation moisture absorption layer 370 of cover-plate glass 310 in the face of transparency carrier 310, to guarantee the stability of ray structure 320.
See also the 4th figure, the 4th figure is the schematic diagram of the 3rd preferred embodiment of the present invention.According to this 3rd preferred embodiment, high contrast organic light emitting display 400 includes transparency carrier 410, in order to carrying ray structure 420.Ray structure 420 includes transparent bottom electrode 422, organic layer 424 and upper electrode arrangement 426.The organic layer 424 of present embodiment also is luminescent layer, and so it also can comprise other organic films, for example organic cavity transmission layer, organic electron transport layer etc.426 of upper electrode arrangement include half penetrating metal layer 4261, optionally resilient coating 4262 and transparency conducting layer 4263 in regular turn.Organic light emitting display 400 includes light absorption cover plate 430 in addition, and encapsulant 450 is arranged between transparency carrier 410 and the light absorption cover plate 430, the thickness of encapsulant 450 can be adjusted according to the thickness of ray structure 420, with control light absorption cover plate 430 and 410 required distances of transparency carrier.
Wherein, the material of light absorption cover plate 430 can be selected materials such as carbon, graphite or carbon black, silicon, germanium, molybdenum, nickel, chromium or its alloy for use.When extraneous light was incident in ray structure 420 by transparency carrier 410, the extraneous light of incident then can be absorbed by light absorption cover plate 430, therefore reduced the reflectivity of extraneous light and improved contrast.In addition, because light absorption cover plate 430 itself promptly has the function of the ambient light that absorbs incident, therefore more can replace the combination of light absorbing zone or light absorbing zone and polaroid, and further reduce the complexity of high contrast organic light emitting display 400 technologies.
In addition, because half penetrating metal layer 4261 uses the metal of low work function usually, its easy and aqueous vapor generation oxidation, cause the destruction of negative electrode, therefore the height contrast organic light emitting display 400 that present embodiment provided more can form moisture absorption layer 470 in the inboard of cover-plate glass 410, to guarantee the stability of ray structure 420.
High contrast organic light emitting display provided by the present invention, the combination of light absorbing zone or light absorbing zone and polaroid is set in the face of another surface surperficial or transparency carrier relatively of transparency carrier in cover-plate glass, what is more, the light absorption cover plate that can directly utilize the light absorption material to form directly replaces light absorbing zone, in order to absorb the ambient light of incident.Because light absorbing zone or light absorption cover-plate glass all are arranged at outside the ray structure, therefore can avoid having influence on the characteristic and the optimization of each organic film of ray structure; In on the technology except that can reducing cost, also can reduce the step that in organic film, increases light absorption material etc. when making ray structure, and make the existing easier integration of technology.
The above only is the preferred embodiments of the present invention, and all equivalent variations and modifications of being done according to the present patent application claim all should belong to covering scope of the present invention.
Claims (24)
1. one kind high contrast organic light emitting display includes:
Transparency carrier;
Cover-plate glass;
Ray structure is located at the surface of this transparency carrier in the face of this cover-plate glass; And
Light absorbing zone is located at the surface of this cover-plate glass;
Wherein this light absorbing zone is in order to absorb ambient light.
2. high contrast organic light emitting display as claimed in claim 1, wherein this light absorbing zone is arranged at the surface of this cover-plate glass in the face of this transparency carrier.
3. high contrast organic light emitting display as claimed in claim 1, wherein this light absorbing zone is arranged at this cover-plate glass another surface of this transparency carrier relatively.
4. high contrast organic light emitting display as claimed in claim 1, wherein this light absorbing zone utilization stickup, coating or thin film technique are formed at the described surface of this cover-plate glass.
5. high contrast organic light emitting display as claimed in claim 1, wherein the material of this light absorbing zone includes light absorption hygroscopic material, monochromatic filter, colored filter, carbon black, melanin material, calcium boride or covellite.
6. high contrast organic light emitting display as claimed in claim 1 also includes polaroid, and this polaroid is arranged at the surface of this cover-plate glass in the face of this transparency carrier.
7. high contrast organic light emitting display as claimed in claim 1 also includes polaroid, and this polaroid is arranged at this cover-plate glass another surface of this transparency carrier relatively.
8. high contrast organic light emitting display as claimed in claim 1, wherein this ray structure includes:
Transparent bottom electrode;
Organic layer; And
Upper electrode arrangement.
9. high contrast organic light emitting display as claimed in claim 8, wherein this organic layer also includes at least one luminescent layer.
10. high contrast organic light emitting display as claimed in claim 8, wherein this upper electrode arrangement includes half penetrating metal layer and transparency conducting layer.
11. as the height contrast organic light emitting display of claim 10, wherein this upper electrode arrangement also includes resilient coating.
12. high contrast organic light emitting display as claimed in claim 1 also includes encapsulant, is arranged between this transparency carrier and this cover-plate glass.
13. one kind high contrast organic light emitting display includes:
Transparency carrier;
The light absorption cover plate; And
Ray structure is located between this transparency carrier and this light absorption cover plate;
Wherein this light absorption cover plate is in order to absorb ambient light.
14. as the height contrast organic light emitting display of claim 13, wherein the material of this light absorption cover plate includes carbon.
15. as the height contrast organic light emitting display of claim 14, wherein the material of this light absorption cover plate includes graphite or carbon black.
16. as the height contrast organic light emitting display of claim 13, wherein the material of this light absorption cover plate includes silicon.
17. as the height contrast organic light emitting display of claim 13, wherein the material of this light absorption cover plate includes germanium, molybdenum, nickel, chromium or its alloy.
18. the height contrast organic light emitting display as claim 13 also includes polaroid, this polaroid is arranged at the surface of this light absorption cover plate in the face of this transparency carrier.
19. the height contrast organic light emitting display as claim 13 also includes a polaroid, this polaroid is arranged at this light absorption cover plate another surface of this transparency carrier relatively.
20. as the height contrast organic light emitting display of claim 13, wherein this ray structure includes:
Transparent bottom electrode;
Organic layer; And
Upper electrode arrangement.
21. as the height contrast organic light emitting display of claim 20, wherein this organic layer also includes at least one luminescent layer.
22. as the height contrast organic light emitting display of claim 20, wherein this upper electrode arrangement includes half penetrating metal layer and transparency conducting layer.
23. as the height contrast organic light emitting display of claim 22, wherein this upper electrode arrangement also includes resilient coating.
24. the height contrast organic light emitting display as claim 13 more includes encapsulant, is arranged between this transparency carrier and this light absorption cover plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510129763 CN1979914A (en) | 2005-12-05 | 2005-12-05 | High-contrast organic luminous display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510129763 CN1979914A (en) | 2005-12-05 | 2005-12-05 | High-contrast organic luminous display |
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| CN1979914A true CN1979914A (en) | 2007-06-13 |
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| CN 200510129763 Pending CN1979914A (en) | 2005-12-05 | 2005-12-05 | High-contrast organic luminous display |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103500753A (en) * | 2013-09-24 | 2014-01-08 | 青岛海信电器股份有限公司 | OLED (Organic Light Emitting Diode) display panel |
| WO2019127785A1 (en) * | 2017-12-27 | 2019-07-04 | 深圳市华星光电技术有限公司 | Packaging structure and packaging method for oled display apparatus |
| CN111463362A (en) * | 2020-04-13 | 2020-07-28 | 京东方科技集团股份有限公司 | Display panel, manufacturing method and driving method thereof, and display device |
-
2005
- 2005-12-05 CN CN 200510129763 patent/CN1979914A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103500753A (en) * | 2013-09-24 | 2014-01-08 | 青岛海信电器股份有限公司 | OLED (Organic Light Emitting Diode) display panel |
| CN103500753B (en) * | 2013-09-24 | 2016-08-17 | 青岛海信电器股份有限公司 | A kind of OLED display panel |
| WO2019127785A1 (en) * | 2017-12-27 | 2019-07-04 | 深圳市华星光电技术有限公司 | Packaging structure and packaging method for oled display apparatus |
| CN111463362A (en) * | 2020-04-13 | 2020-07-28 | 京东方科技集团股份有限公司 | Display panel, manufacturing method and driving method thereof, and display device |
| CN111463362B (en) * | 2020-04-13 | 2022-12-20 | 京东方科技集团股份有限公司 | Display panel, manufacturing method and driving method thereof, and display device |
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Open date: 20070613 |