WO2015161573A1 - 有机发光二极管显示面板及其制作方法 - Google Patents
有机发光二极管显示面板及其制作方法 Download PDFInfo
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- WO2015161573A1 WO2015161573A1 PCT/CN2014/082506 CN2014082506W WO2015161573A1 WO 2015161573 A1 WO2015161573 A1 WO 2015161573A1 CN 2014082506 W CN2014082506 W CN 2014082506W WO 2015161573 A1 WO2015161573 A1 WO 2015161573A1
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 239000003086 colorant Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 11
- 239000010410 layer Substances 0.000 description 236
- 239000011368 organic material Substances 0.000 description 8
- 229920001621 AMOLED Polymers 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 7
- 238000001704 evaporation Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 5
- 230000005525 hole transport Effects 0.000 description 4
- 238000004070 electrodeposition Methods 0.000 description 3
- 239000002346 layers by function Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005019 vapor deposition process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
- H10K59/353—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels characterised by the geometrical arrangement of the RGB subpixels
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/81—Anodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/81—Anodes
- H10K50/813—Anodes characterised by their shape
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/82—Cathodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/805—Electrodes
- H10K59/8051—Anodes
- H10K59/80515—Anodes characterised by their shape
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/302—Details of OLEDs of OLED structures
- H10K2102/3023—Direction of light emission
- H10K2102/3026—Top emission
Definitions
- the present invention relates to the field of display technologies, and in particular, to an organic light emitting diode display panel and a method of fabricating the same. Background technique
- OLED Organic Light-Emitting Diode
- the basic structure of the OLED includes an anode, a cathode, and an organic light-emitting layer between the anode and the cathode; OLED light-emitting means that the organic light-emitting layer is driven by an applied electric field, and the phenomenon of light emission is caused by carrier injection and recombination of the anode and the cathode.
- OLEDs can be classified into Passive Matrix (PM) PMOLED and Active Drive (AM) AMOLED.
- the PMOLED is formed into a matrix by a cathode and an anode, and illuminates the pixels in the array in a scanning manner. Each pixel is operated in a short pulse mode, and is an instant high-luminance illumination.
- the structure is simple and can effectively reduce the manufacturing cost, but Its high driving voltage is not suitable for use in large-size, high-resolution display panels.
- AMOLED uses a separate Thin Film Transistor (TFT) to control each pixel. Each pixel can drive light continuously and independently.
- TFT Thin Film Transistor
- AMOLED has a lower driving voltage and a longer lifetime, which can be applied to large sizes. Flat panel display, but its production process is more complicated and the cost is relatively high.
- the AMOLED display panel includes a plurality of pixel units arranged in an array. As shown in FIG. 1, each of the pixel units 100 includes a red light emitting device 2, a green light emitting device 3, and a blue light emitting device 4 arranged side by side, and The thin film transistor 5 corresponding to each color light-emitting device.
- a disadvantage of the existing AMOLED display panel is that when the screen is viewed at a close distance, there is a color edge phenomenon in the pixel unit, thereby affecting the display effect of the display panel.
- various colors of light The light-emitting layer of the device needs to be formed by evaporation using a separate high-precision metal mask, which results in a high manufacturing cost of the display panel.
- Embodiments of the present invention provide an organic light emitting diode display panel and a method of fabricating the same to improve display performance of the display panel.
- An OLED display panel provided by an embodiment of the invention includes a plurality of pixel units arranged in an array, each pixel unit including a first electrode layer, a second electrode layer, and between the first electrode layer and the second electrode layer Corresponding to at least three luminescent layers of different colors, wherein:
- the at least three light emitting layers include a planar light emitting layer and at least two annular light emitting layers disposed concentrically with the planar light emitting layer and arranged in a radial shape;
- the first electrode layer has a planar first electrode corresponding to the position of the planar light-emitting layer, and the first electrode layer has an annular first electrode corresponding to the position of each of the annular light-emitting layers.
- At least three illuminating layers are arranged concentrically, which can improve the color edge phenomenon of the pixel unit when viewed at a close distance, thereby greatly improving the display effect of the display panel.
- the at least three luminescent layers comprise a red luminescent layer, a green luminescent layer, and a blue luminescent layer.
- the red light-emitting layer is a planar light-emitting layer
- the green light-emitting layer and the blue light-emitting layer are respectively arranged in a radial shape, and the inner side of the green light-emitting layer has a first transport layer of the same material.
- the transport layer covers the red light-emitting layer, and the inner side of the blue light-emitting layer has a second transport layer of the same material, and the second transport layer covers the green light-emitting layer and the first transport layer.
- the green light emitting layer and the first transport layer are made of the same organic material, and the blue light emitting layer and the second transport layer are made of the same organic material, which can greatly simplify the manufacturing process of the light emitting layer, and because the blue light emitting layer does not have the risk of color mixing, blue
- the luminescent layer and the second transmission layer as a whole can be fabricated by using a mask having lower precision, thereby significantly saving manufacturing costs.
- the red light emitting layer, the green light emitting layer and the blue light emitting layer are located on the same layer.
- a defined frame is disposed between the planar first electrode and the adjacent annular first electrode, between the adjacent annular first electrodes, and the outermost annular first electrode outer side.
- the bounding frame is used to space the first electrodes to ensure that the first electrode can work independently and reliably.
- a method for fabricating an OLED display panel includes: forming a first electrode layer on a substrate, the first electrode layer including a planar first electrode and concentrically disposed with the planar first electrode And at least two annular first electrodes arranged in a radial shape; a planar light-emitting layer is formed on the opposite side of the planar first electrode position, in each ring-shaped An annular light-emitting layer is formed on the opposite side of the electrode, and the planar light-emitting layer and the annular light-emitting layer respectively have different colors; and the display panel produced by the method has the same light-emitting layer of each pixel unit concentrically disposed, Improve the color edge phenomenon of the pixel unit when viewing at a close distance, thereby greatly improving the display effect of the display panel.
- the planar light-emitting layer is formed on the opposite side of the planar first electrode, and the annular light-emitting layer is formed on the opposite side of each of the annular first electrode positions, and specifically includes:
- a blue light-emitting layer material is used to form a second transport layer covering the green light-emitting layer and the first transport layer, and a blue light-emitting layer outside the second transport layer.
- the green light emitting layer and the first transport layer are made of the same organic material, and the blue light emitting layer and the second transport layer are made of the same organic material, which can greatly simplify the manufacturing process of the light emitting layer, and because the blue light emitting layer does not have the risk of color mixing, blue
- the luminescent layer and the second transmission layer as a whole can be fabricated by using a mask having lower precision, thereby significantly saving manufacturing costs.
- the method further includes: between the planar first electrode and the adjacent annular first electrode, between the adjacent annular first electrodes, And a defined frame is formed on the outer side of the annular first electrode of the outermost ring.
- a bounding frame is used to space the first electrodes to ensure independent and reliable operation of the first electrode.
- the bounding frame before forming the red light emitting layer, further comprising forming the first common layer.
- the blue light emitting layer further comprising forming a second common layer, the second electrode layer being located in the structure of the second common layer.
- FIG. 1 is a schematic top plan view of a conventional AMOLED display panel
- FIG. 2 is a schematic top plan view of an OLED display panel according to an embodiment of the present invention
- FIG. 3 is a schematic top plan view of the pixel unit of FIG.
- FIG. 4 is a schematic cross-sectional view of the AA of Figure 3;
- FIG. 5 is a schematic cross-sectional view of a pixel unit according to another embodiment of the present invention;
- FIG. 6 is a schematic flow chart of a method for fabricating an OLED display panel according to still another embodiment of the present invention.
- I-substrate substrate 2-red light-emitting device; 3-green light-emitting device; 4-blue light-emitting device; 5-thin film transistor;
- I I - second transport layer 12 - bounding box; 13 - first common layer; 14 - second common layer.
- an embodiment of the present invention provides an organic light emitting diode (hereinafter referred to as OLED) display panel and a manufacturing method thereof.
- OLED organic light emitting diode
- at least two annular light-emitting layers are arranged, and at least three light-emitting layers are concentrically arranged. This solution can improve the color edge phenomenon of the pixel unit when viewed at a close distance, thereby greatly improving the display effect of the display panel.
- an OLED display panel includes a plurality of pixel units 100 arranged in an array, and each pixel unit 100 includes a first electrode layer 6 and a second electrode layer. 7, and at least three luminescent layers corresponding to different colors between the first electrode layer 6 and the second electrode layer 7, wherein: at least two annular luminescent layers 9 arranged in a radial pattern;
- the first electrode layer 6 has a planar first electrode 61 at a position corresponding to the planar light-emitting layer 8, and the first electrode layer 6 has an annular first electrode 62 at a position corresponding to each of the annular light-emitting layers 9.
- the OLED display panel provided by one embodiment of the present invention may be a PMOLED display panel or an AMOLED display panel. As shown in FIG. 4, the OLED in this embodiment is a top emission type, and in other embodiments of the present invention, the OLED may also be a bottom emission type.
- the first electrode layer 6 may specifically be an anode layer, and the second electrode layer 7 is a cathode layer, or the first electrode layer 6 is a cathode layer, and the second electrode layer 7 is an anode layer.
- the specific structure of the pixel unit 100 is not limited, and may include, for example, a red light emitting layer (R light emitting layer), a green light emitting layer (G light emitting layer), and a blue light emitting layer (B light emitting layer), and may also include a red light emitting layer (R The light-emitting layer), the green light-emitting layer (G light-emitting layer), the blue light-emitting layer (B light-emitting layer), and the white light-emitting layer (W light-emitting layer) are not specifically limited herein.
- a specific embodiment including a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer will be described as an example.
- the red light emitting layer is a planar light emitting layer 8
- the green light emitting layer and the blue light emitting layer are respectively annular light emitting layers 9 and arranged in a radial shape, and the inner side of the green light emitting layer has the same
- the first transport layer 10 of the material covers the red light-emitting layer.
- the inner side of the blue light-emitting layer has a second transport layer 11 of the same material.
- the second transport layer 11 covers the green light-emitting layer and the first transport layer 10.
- the green light emitting layer and the first transport layer 10 are made of the same organic material, and the blue light emitting layer and the second transport layer 11 are made of the same organic material, which can greatly simplify the manufacturing process of the light emitting layer, and there is no risk of color mixing due to the blue light emitting layer.
- the blue light-emitting layer and the second transmission layer 11 can be formed by a large-area evaporation of a mask having a low precision, thereby significantly saving the manufacturing cost.
- the OLED device can be structurally debugged, and the appropriate functional layer thickness is selected to realize the light-emitting region of the red light-emitting layer, the first transport layer 10 of the same material as the green light-emitting layer, and the second transmission of the same material as the blue light-emitting layer.
- the layer 11 only functions as an electron transport, and the position where the holes and electrons recombine in the OLED device structure is in the red light-emitting layer.
- the second transport layer 11 of the same material as the blue light-emitting layer functions only for electron transport, and the position where the holes and electrons recombine is in the green light-emitting layer.
- the red light Since the wavelength of the red light is longer than that of the green light or the blue light, the red light is not absorbed in the first transport layer 10 and the second transport layer 11. Similarly, since the wavelength of the green light is longer than the blue light, the green light is not absorbed in the second transport layer 11, and the OLED device can achieve normal light emission.
- the pixel unit In the pixel structure of the existing OLED display panel, since the red light emitting device, the green light emitting device, and the blue light emitting device are arranged side by side, the geometric centers are mutually deviated. When the screen is viewed at a close distance, the pixel unit has a color edge phenomenon, thereby affecting the display panel. display effect.
- the pixel structure of the OLED display panel of the embodiment of the invention at least three illuminating layers are concentrically arranged, which can improve the color edge phenomenon of the pixel unit during close-up viewing, thereby greatly improving the display effect of the display panel.
- the outer side is respectively provided with a bounding frame 12, and correspondingly, the white area between adjacent light emitting layers in FIG. 3 is a non-light emitting area opposite to the position of the bounding frame 12.
- the delimiting frame 12 is for spacing the first electrodes to ensure that the first electrode is capable of independent and reliable operation.
- the OLED device is further provided with a first common layer 13 between the first electrode layer 6 and the red light emitting layer (when the first electrode layer 6 is an anode layer, and the structure of the first common layer 13 may include a hole transport layer), a second public is placed above the blue light emitting layer
- the common layer 14 (the structure of the second common layer 14 may include a second electrode layer 7 as a cathode layer and a hole transport layer between the cathode layer and the blue light-emitting layer).
- the red light emitting layer, the green light emitting layer and the blue light emitting layer are located on the same layer, and the light emitting layers are concentrically arranged and arranged in a radial shape, and the embodiment can also improve the close distance.
- the color edge phenomenon of the pixel unit during viewing improves the display effect of the display panel.
- an embodiment of the present invention further provides a method for fabricating the OLED display panel shown in FIG. 4, which includes the following steps:
- Step 101 forming a first electrode layer 6 on the base substrate 1, the first electrode layer 6 including a planar first electrode 61 and at least two rings arranged concentrically with the planar first electrode 61 and arranged in a radial shape First electrode 62;
- Step 102 forming a planar light-emitting layer 8 above the position of the planar first electrode 61, forming an annular light-emitting layer 9 on the opposite side of each of the annular first electrodes 62, and the planar light-emitting layer 8 and each ring-shaped layer
- the luminescent layers 9 respectively correspond to different colors
- Step 103 forming a second electrode layer 7 above the planar light-emitting layer 8 and each of the annular light-emitting layers 9.
- the display panel produced by the method has the same illuminating layer of each pixel unit, which can improve the color edge phenomenon of the pixel unit during close-up viewing, thereby greatly improving the display effect of the display panel.
- step 102 specifically includes:
- a second light-emitting layer material is used to form a second transport layer 11 covering the green light-emitting layer and the first transport layer 10, and a blue light-emitting layer located outside the second transport layer 11.
- Forming an OLED device on a base substrate generally adopts an evaporation process, which means heating the evaporation material under a certain vacuum condition, and melting (or sublimating) the evaporation material into a vapor composed of atoms, molecules or atomic groups, and then condensing in the vapor deposition process.
- the surface of the substrate is filmed to form a functional layer of the OLED device.
- a mask is required to form a pattern of each functional layer on the surface of the substrate.
- the light-emitting layer of each color-emitting device needs to be formed by evaporation using an independent high-precision metal mask, which results in a high manufacturing cost of the display panel. .
- the green light emitting layer and the first transport layer 10 are made of the same organic material, and the blue light emitting layer and the second transport layer 11 are made of the same organic material, the manufacturing process is simplified, and since the blue light emitting layer is not There is a risk of color mixing, blue hair
- the light layer and the second transmission layer 11 as a whole can be formed by large-area evaporation using a mask having a lower precision, thereby significantly saving manufacturing costs.
- the method further includes: between the planar first electrode 61 and the adjacent annular first electrode 62, the adjacent annular first electrode 62 A defined frame 12 is formed between the outer side of the annular first electrode 62 and the outermost ring.
- the delimiting frame 12 is used to space the first electrodes to ensure that the first electrodes are capable of independent and reliable operation.
- the second electrode layer 7 being located in the second common In the structure of layer 14.
- the structure of the first common layer 13 may include a hole transport layer
- the structure of the second common layer 14 includes a second electrode layer 7 as a cathode layer and a cathode layer and a blue light-emitting layer. A hole transport layer between. It is within the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and the modifications
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Abstract
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US14/435,738 US9768236B2 (en) | 2014-04-22 | 2014-07-18 | Organic light emitting diode display panel and manufacturing method thereof |
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CN201410163110.X | 2014-04-22 | ||
CN201410163110.XA CN103972268B (zh) | 2014-04-22 | 2014-04-22 | 有机发光二极管显示面板及其制作方法 |
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WO2015161573A1 true WO2015161573A1 (zh) | 2015-10-29 |
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US (1) | US9768236B2 (zh) |
CN (1) | CN103972268B (zh) |
WO (1) | WO2015161573A1 (zh) |
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CN105070745A (zh) * | 2015-09-17 | 2015-11-18 | 京东方科技集团股份有限公司 | 显示基板及其制造方法、显示装置、掩膜版 |
CN106652805B (zh) * | 2016-10-21 | 2019-03-19 | 上海天马微电子有限公司 | 显示面板和显示装置 |
CN107452778B (zh) * | 2017-07-25 | 2020-06-02 | 京东方科技集团股份有限公司 | 显示基板、显示装置及其显示方法、掩模板 |
CN111554723B (zh) * | 2020-05-18 | 2023-05-26 | 京东方科技集团股份有限公司 | 像素结构和显示面板 |
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CN1953199A (zh) * | 2005-10-21 | 2007-04-25 | 三星Sdi株式会社 | 有机发光显示器及其制造方法 |
CN101198201A (zh) * | 2006-12-06 | 2008-06-11 | 三星Sdi株式会社 | 有机发光显示设备及其制造方法 |
US20080157657A1 (en) * | 2006-12-22 | 2008-07-03 | Sony Corporation | Organic electroluminescent device and display |
JP2011071012A (ja) * | 2009-09-28 | 2011-04-07 | Fujifilm Corp | 有機電界発光表示装置 |
CN103022051A (zh) * | 2012-12-14 | 2013-04-03 | 京东方科技集团股份有限公司 | 一种阵列基板、有机发光显示面板及显示装置 |
CN203787434U (zh) * | 2014-04-22 | 2014-08-20 | 京东方科技集团股份有限公司 | 有机发光二极管显示面板 |
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JP2657159B2 (ja) * | 1991-12-26 | 1997-09-24 | セイコープレシジョン株式会社 | El素子とこのel素子を用いた時計 |
JP4062171B2 (ja) * | 2003-05-28 | 2008-03-19 | ソニー株式会社 | 積層構造の製造方法 |
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2014
- 2014-04-22 CN CN201410163110.XA patent/CN103972268B/zh active Active
- 2014-07-18 US US14/435,738 patent/US9768236B2/en active Active
- 2014-07-18 WO PCT/CN2014/082506 patent/WO2015161573A1/zh active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN1953199A (zh) * | 2005-10-21 | 2007-04-25 | 三星Sdi株式会社 | 有机发光显示器及其制造方法 |
CN101198201A (zh) * | 2006-12-06 | 2008-06-11 | 三星Sdi株式会社 | 有机发光显示设备及其制造方法 |
US20080157657A1 (en) * | 2006-12-22 | 2008-07-03 | Sony Corporation | Organic electroluminescent device and display |
JP2011071012A (ja) * | 2009-09-28 | 2011-04-07 | Fujifilm Corp | 有機電界発光表示装置 |
CN103022051A (zh) * | 2012-12-14 | 2013-04-03 | 京东方科技集团股份有限公司 | 一种阵列基板、有机发光显示面板及显示装置 |
CN203787434U (zh) * | 2014-04-22 | 2014-08-20 | 京东方科技集团股份有限公司 | 有机发光二极管显示面板 |
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Publication number | Publication date |
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US20170040390A1 (en) | 2017-02-09 |
CN103972268A (zh) | 2014-08-06 |
US9768236B2 (en) | 2017-09-19 |
CN103972268B (zh) | 2017-01-04 |
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