CN110112322B - Display panel and display device - Google Patents
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- CN110112322B CN110112322B CN201910499937.0A CN201910499937A CN110112322B CN 110112322 B CN110112322 B CN 110112322B CN 201910499937 A CN201910499937 A CN 201910499937A CN 110112322 B CN110112322 B CN 110112322B
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- 239000012788 optical film Substances 0.000 claims abstract description 153
- 230000003287 optical effect Effects 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims description 14
- 238000000605 extraction Methods 0.000 claims description 12
- 239000011368 organic material Substances 0.000 claims description 4
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical class C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 claims description 3
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 3
- 150000008360 acrylonitriles Chemical class 0.000 claims description 3
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 claims description 3
- 239000012965 benzophenone Substances 0.000 claims description 3
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 3
- 239000012964 benzotriazole Substances 0.000 claims description 3
- 229920002313 fluoropolymer Polymers 0.000 claims description 3
- 239000004811 fluoropolymer Substances 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229920000570 polyether Polymers 0.000 claims description 3
- 229960001860 salicylate Drugs 0.000 claims description 3
- 238000002834 transmittance Methods 0.000 claims description 3
- YGSDEFSMJLZEOE-UHFFFAOYSA-M salicylate Chemical compound OC1=CC=CC=C1C([O-])=O YGSDEFSMJLZEOE-UHFFFAOYSA-M 0.000 claims 1
- 230000005499 meniscus Effects 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 140
- 238000010586 diagram Methods 0.000 description 9
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000013041 optical simulation Methods 0.000 description 2
- 150000003873 salicylate salts Chemical group 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- 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
- H10K50/85—Arrangements for extracting light from the devices
-
- 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
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
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- 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
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- Optics & Photonics (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention discloses a display panel and a display device.A light-emitting side of a light-emitting unit is provided with an optical light-emitting structure consisting of a plurality of columnar micro-lens units which are regularly arranged, and each micro-lens unit comprises a first optical film layer, a second optical film layer and a third optical film layer which are arranged in a stacked manner; the surface of the second optical film layer contacting the first optical film layer is a convex curved surface, the surface of the second optical film layer contacting the third optical film layer is a concave curved surface, namely the second optical film layer is a meniscus lens structure, the refractive index of the second optical film layer is greater than that of the first optical film layer, and the refractive index of the first optical film layer is greater than that of the third optical film layer. Because the curvatures of the upper interface and the lower interface of the meniscus-shaped second optical film layer are different, the emergent angle of the light limited in the light-emitting unit can be continuously adjusted through the meniscus-shaped second optical film layer, and when the emergent angle is smaller than the critical angle, the light can be taken out, so that the light-emitting efficiency of the display panel is increased.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
Light-emitting Diodes (OLEDs) are a new type of lighting and display technology, and have the advantages of low energy consumption, high Light-emitting efficiency, fast response speed, wide viewing angle, low driving voltage, etc. However, the light extraction efficiency of the current OLED product is still low, only about 20% of light can exit out of the OLED device, and the rest of light is still confined in the organic layer of the OLED device due to the principle of total reflection, so that the efficiency of the OLED device is greatly reduced.
Therefore, in order to achieve the required brightness, the power consumption of the OLED device needs to be increased, but this may reduce the lifetime of the OLED device. Therefore, how to improve the light extraction efficiency of the OLED device becomes a current heat generation point.
Disclosure of Invention
In view of this, embodiments of the present invention provide a display panel and a display device, so as to solve the problem of low light emitting efficiency of an OLED display panel in the prior art.
The display panel provided by the embodiment of the invention comprises a light emitting unit array and further comprises: the optical light-emitting structure is positioned at the light-emitting side of the light-emitting unit array;
the optical light-emitting structure comprises a plurality of columnar micro-lens units which are regularly arranged; the micro-lens unit comprises a first optical film layer, a second optical film layer and a third optical film layer which are sequentially stacked on the light emitting side of the light emitting unit; wherein,
the surface of the second optical film layer, which is in contact with the first optical film layer, is a convex curved surface, the surface of the second optical film layer, which is in contact with the third optical film layer, is a concave curved surface, and the curvature of the convex curved surface of the second optical film layer is greater than that of the concave curved surface of the second optical film layer;
the refractive index of the second optical film layer is greater than that of the first optical film layer, and the refractive index of the first optical film layer is greater than that of the third optical film layer.
Optionally, in the display panel provided in the embodiment of the present invention, the optical light-exiting structure further includes a fourth optical film layer filled between the microlens units;
the refractive index of the fourth optical film layer is smaller than that of the third optical film layer.
Optionally, in the display panel provided in the embodiment of the present invention, a material of the fourth optical film layer is an organic material having an ultraviolet absorption function.
Optionally, in the display panel provided in the embodiment of the present invention, the material of the fourth optical film layer is a salicylate, a benzophenone, a benzotriazole, a substituted acrylonitrile, or a triazine.
Optionally, in the display panel provided in the embodiment of the present invention, the thickest part of the second optical film layer has a thickness of 8 μm to 10 μm.
Optionally, in the display panel provided by the embodiment of the invention, the refractive indexes of the first optical film layer, the second optical film layer and the third optical film layer are all 1.3-2.4.
Optionally, in the display panel provided in the embodiment of the present invention, the first optical film layer is made of a polyether material, the second optical film layer is made of a polyester material, and the third optical film layer is made of a fluoropolymer.
Optionally, in the display panel provided in the embodiment of the present invention, a light transmittance of the optical light extraction structure is greater than or equal to 85%.
Optionally, in the display panel provided in the embodiment of the present invention, each light emitting unit corresponds to one microlens unit.
Correspondingly, the embodiment of the invention also provides a display device which comprises any one of the display panels provided by the embodiment of the invention.
The invention has the following beneficial effects:
in the display panel and the display device provided by the embodiment of the invention, the light-emitting side of the light-emitting unit is provided with the optical light-emitting structure formed by the plurality of columnar micro-lens units which are regularly arranged, and each micro-lens unit consists of a first optical film layer, a second optical film layer and a third optical film layer which are sequentially laminated on the light-emitting side of the light-emitting unit; the surface of the second optical film layer contacting the first optical film layer is a convex curved surface, the surface of the second optical film layer contacting the third optical film layer is a concave curved surface, namely the second optical film layer is a meniscus lens structure, the refractive index of the second optical film layer is greater than that of the first optical film layer, and the refractive index of the first optical film layer is greater than that of the third optical film layer. Because the curvatures of the upper interface and the lower interface of the meniscus-shaped second optical film layer are different, the emergent angle of the light limited in the light-emitting unit can be continuously adjusted through the meniscus-shaped second optical film layer, and when the emergent angle is smaller than the critical angle, the light can be taken out, so that the light-emitting efficiency of the display panel is increased.
Drawings
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an optical path of a microlens unit in a display panel according to an embodiment of the present invention;
FIG. 3a is a schematic structural diagram of a microlens unit in a display panel according to an embodiment of the invention;
FIG. 3b is a second schematic structural diagram of a microlens unit in a display panel according to an embodiment of the present invention;
FIG. 3c is a third schematic structural diagram of a microlens unit in a display panel according to an embodiment of the present invention;
fig. 4a is a schematic view illustrating an arrangement of microlens units in an optical light-exiting structure according to an embodiment of the present invention;
fig. 4b is a second schematic view illustrating an arrangement of microlens units in an optical light-exiting structure according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an optical light exit structure in a display panel according to an embodiment of the present invention;
fig. 6a is a second schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 6b is a third schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 7 is a schematic light path diagram of an optical light exit structure in a display panel according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The shapes and sizes of the various elements in the drawings are not to scale and are merely intended to illustrate the invention.
As shown in fig. 1, the display panel provided in the embodiment of the present invention includes a light emitting unit array 1, and further includes: an optical light-emitting structure 2 positioned at the light-emitting side of the light-emitting unit array 1;
the optical light-emitting structure 2 comprises a plurality of columnar microlens units 10 which are regularly arranged; as shown in fig. 2, the microlens unit 10 includes a first optical film layer 11, a second optical film layer 12, and a third optical film layer 13 sequentially stacked on a light emitting side of the light emitting unit; wherein,
the contact surface of the second optical film layer 12 and the first optical film layer 11 is a convex curved surface, the contact surface of the second optical film layer 12 and the third optical film layer 13 is a concave curved surface, and the curvature of the convex curved surface of the second optical film layer 12 is greater than that of the concave curved surface of the second optical film layer 12;
the refractive index of the second optical film layer 12 is greater than that of the first optical film layer 11, and the refractive index of the first optical film layer 11 is greater than that of the third optical film layer 13.
In the display panel provided by the embodiment of the invention, the light-emitting side of the light-emitting unit is provided with the optical light-emitting structure formed by the plurality of columnar micro-lens units which are regularly arranged, and each micro-lens unit consists of a first optical film layer, a second optical film layer and a third optical film layer which are sequentially laminated on the light-emitting side of the light-emitting unit; the surface of the second optical film layer contacting the first optical film layer is a convex curved surface, the surface of the second optical film layer contacting the third optical film layer is a concave curved surface, namely the second optical film layer is a meniscus lens structure, the refractive index of the second optical film layer is greater than that of the first optical film layer, and the refractive index of the first optical film layer is greater than that of the third optical film layer. Because the curvatures of the upper interface and the lower interface of the meniscus-shaped second optical film layer are different, the emergent angle of the light limited in the light-emitting unit can be continuously adjusted through the meniscus-shaped second optical film layer, and when the emergent angle is smaller than the critical angle, the light can be taken out, so that the light-emitting efficiency of the display panel is increased.
When the display panel is specifically implemented, the light emitting path is adjusted through the curvature and the thickness of the upper curved surface and the lower curved surface of the second optical film layer and the refractive indexes of the three optical film layers, so that the total reflection probability can be reduced as much as possible, and the light emitting efficiency of the display panel is improved.
In a specific implementation, in the display panel provided in the embodiment of the present invention, one microlens unit may correspond to a plurality of light emitting units, that is, one microlens unit covers a plurality of light emitting units, and of course, one microlens unit may correspond to one light emitting unit, which is not limited herein.
Optionally, in the display panel provided in the embodiment of the present invention, each light emitting unit corresponds to one microlens unit, so that not only the light extraction rate can be improved, but also the color interference and the color mixing between the light emitting units can be reduced.
In a specific implementation, a cross section of the microlens unit perpendicular to the light emitting direction may be any shape, such as a circle, a regular polygon, and the like, and is not limited herein. Specifically, the microlens unit 10 may have a cylindrical structure as shown in fig. 3a, a rectangular prism structure as shown in fig. 3b, or a triangular prism structure as shown in fig. 3 c.
Specifically, in the display panel provided by the embodiment of the present invention, the area of the microlens unit may be adjusted according to the size of the light emitting unit, and the area of the microlens unit is equal to or larger than the area of the light emitting unit. However, in practical implementation, too large area of the lens unit may affect light extraction efficiency and display effect, and therefore, the maximum diameter width of the microlens unit in the display panel provided by the embodiment of the invention may be optionally controlled to be between 18 μm and 32 μm, which is not limited herein.
Further, in the display panel provided in the embodiment of the present invention, the plurality of microlens units 10 in the optical light extraction structure 2 may be arranged in an orthogonal array as shown in fig. 4a, or in a honeycomb type array as shown in fig. 4b, or in the same arrangement manner as the light emitting units, or in other array arrangements after optical simulation, which is not limited herein.
In implementation, the duty cycle of the array can be changed by adjusting the size of the microlens unit size and the size of the microlens unit interval size empirically to adjust the light extraction efficiency, which is not limited herein. In addition, in the specific implementation, the area of the microlens unit and the curvature of the lower curved surface of the second optical film layer need to be adjusted according to the actual installation situation of the light emitting unit, wherein the curvature of the lower curved surface of the second optical film layer can be adjusted through optical simulation.
Optionally, in the display panel provided in the embodiment of the present invention, as shown in fig. 5, the optical light exit structure 2 further includes a fourth optical film layer 14 filled between the microlens units 10;
the refractive index of the fourth optical film layer 14 is smaller than the refractive index of the third optical film layer 13.
Therefore, due to the fact that the difference between the refractive indexes of the fourth optical film layer and the first optical film layer is large, light emitted by the light emitting unit is totally reflected on the interface of the fourth optical film layer and the first optical film layer after passing through the first optical film layer, and then returns to the upper portion of the light emitting unit to be emitted, and color interference and color mixing among the light emitting units are reduced.
Optionally, in the display panel provided in the embodiment of the present invention, the fourth optical film is made of an organic material having an ultraviolet absorption function, so that the fourth optical film can absorb part of the amount of ultraviolet light entering the light emitting unit from the outside, thereby reducing aging of the organic material inside the light emitting unit due to ultraviolet light and prolonging the lifetime of the device.
Optionally, in the display panel provided in the embodiment of the present invention, the material of the fourth optical film layer is a salicylate, a benzophenone, a benzotriazole, a substituted acrylonitrile, or a triazine, which is not limited herein.
Optionally, in the display panel provided in the embodiment of the present invention, the thickness of the thickest part of the second optical film layer is controlled to be between 8 μm and 10 μm, which is not limited herein.
Optionally, in the display panel provided in the embodiment of the present invention, the refractive indexes of the first optical film layer, the second optical film layer, and the third optical film layer are all 1.3 to 2.4, but the refractive index of the second optical film layer is greater than the refractive index of the first optical film layer, and the refractive index of the first optical film layer is greater than the refractive index of the third optical film layer.
Optionally, in the display panel provided in the embodiment of the present invention, the material of the first optical film layer is a polyether material, the material of the second optical film layer is a polyester material, and the material of the third optical film layer is a fluoropolymer, which is not limited herein.
Optionally, in the display panel provided in the embodiment of the present invention, a light transmittance of the optical light exit structure is greater than or equal to 85% to ensure light exit efficiency of the light exit side of the light emitting unit.
In specific implementation, in the display panel provided in the embodiment of the present invention, as shown in fig. 6a and 6b, the light emitting cell array 1 may include an anode layer 101, a light emitting layer 102, and a cathode layer 103. The light-emitting layer generally includes a hole injection layer, a hole transport layer, a light-emitting functional layer, an electron transport layer, an electron injection layer, and the like, and is not limited herein.
In a specific implementation, in the display panel provided in the embodiment of the present invention, the light emitting unit may be a top emission type or a bottom emission type. When the light emitting unit may be a top emission type, as shown in fig. 6a, the anode layer 101 is a reflective electrode layer, the cathode layer 103 is a transparent electrode layer, and light emitted from the light emitting layer 102 is emitted through the cathode layer 103 side. The optical light exit structure 2 is located at a side of the cathode layer 103 facing away from the light emitting layer 102. And in the lens unit 10 in the optical light-emitting structure 2, the first light-emitting film layer 11 is located at a side close to the cathode layer 103. When the light emitting unit may be a bottom emission type, as shown in fig. 6b, the anode layer 101 is a transparent electrode layer, the cathode layer 103 is a reflective electrode layer, and light emitted from the light emitting layer 102 is emitted through the anode layer 101 side. The light exit structure 2 is located at a side of the anode layer 101 facing away from the light emitting layer 102. And in the lens unit 10 in the optical light extraction structure 2, the first light emitting film layer 11 is located at a side close to the anode layer 101.
According to the display panel provided by the embodiment of the invention, the duty ratio of the optical light-emitting structure can be changed by adjusting the size of the micro-lens units in the optical light-emitting structure and the size of the interval between the micro-lens units according to actual conditions so as to adjust the light extraction efficiency. In addition, in the optical light-emitting structure, the refractive indexes of the materials are sequentially the second optical film layer, the first optical film layer, the third optical film layer and the fourth optical film layer, so that the refractive index of a light-taking path is gradually reduced, and the waveguide effect is weakened. As shown in fig. 7, since the refractive index difference between the first optical film layer 11 and the fourth optical film layer 14 is large, a part of light is totally reflected at the interface between the first optical film layer 11 and the fourth optical film layer 14, and returns to the light emitting side of the light emitting unit to be emitted, thereby reducing color interference and color mixing between the light emitting units.
In a specific implementation, in the display panel provided in the embodiment of the present invention, the microlens unit in the optical light extraction structure may be fabricated by an imprinting or photolithography method, which is not limited herein.
Based on the same inventive concept, the embodiment of the invention further provides a display device, which comprises any one of the display panels provided by the embodiment of the invention. The display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. The display device can be implemented by referring to the above embodiments of the display panel, and repeated descriptions are omitted.
In the display panel and the display device provided by the embodiment of the invention, the light-emitting side of the light-emitting unit is provided with the optical light-emitting structure formed by the plurality of columnar micro-lens units which are regularly arranged, and each micro-lens unit consists of a first optical film layer, a second optical film layer and a third optical film layer which are sequentially laminated on the light-emitting side of the light-emitting unit; the surface of the second optical film layer contacting the first optical film layer is a convex curved surface, the surface of the second optical film layer contacting the third optical film layer is a concave curved surface, namely the second optical film layer is a meniscus lens structure, the refractive index of the second optical film layer is greater than that of the first optical film layer, and the refractive index of the first optical film layer is greater than that of the third optical film layer. Because the curvatures of the upper interface and the lower interface of the meniscus-shaped second optical film layer are different, the emergent angle of the light limited in the light-emitting unit can be continuously adjusted through the meniscus-shaped second optical film layer, and when the emergent angle is smaller than the critical angle, the light can be taken out, so that the light-emitting efficiency of the display panel is increased.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A display panel comprising an array of light emitting cells, further comprising: the optical light-emitting structure is positioned at the light-emitting side of the light-emitting unit array;
the optical light-emitting structure comprises a plurality of columnar micro-lens units which are regularly arranged; the micro-lens unit comprises a first optical film layer, a second optical film layer and a third optical film layer which are sequentially stacked on the light emitting side of the light emitting unit; wherein,
the surface of the second optical film layer, which is in contact with the first optical film layer, is a convex curved surface, the surface of the second optical film layer, which is in contact with the third optical film layer, is a concave curved surface, and the curvature of the convex curved surface of the second optical film layer is greater than that of the concave curved surface of the second optical film layer;
the refractive index of the second optical film layer is larger than that of the first optical film layer, the refractive index of the first optical film layer is larger than that of the third optical film layer, and the refractive indexes of the first optical film layer, the second optical film layer and the third optical film layer are all 1.3-2.4.
2. The display panel of claim 1, wherein the optical light extraction structure further comprises a fourth optical film layer filled between the micro lens units;
the refractive index of the fourth optical film layer is less than the refractive index of the third optical film layer.
3. The display panel according to claim 2, wherein a material of the fourth optical film layer is an organic material having an ultraviolet absorbing function.
4. The display panel of claim 3, wherein the fourth optical film layer is made of a salicylate, a benzophenone, a benzotriazole, a substituted acrylonitrile, or a triazine.
5. The display panel according to any one of claims 1 to 4, wherein the thickest portion of the second optical film layer has a thickness of 8 μm to 10 μm.
6. The display panel of claim 1, wherein the first optical film layer is made of a polyether material, the second optical film layer is made of a polyester material, and the third optical film layer is made of a fluoropolymer.
7. The display panel according to any one of claims 1 to 4, wherein the optical light extraction structure has a light transmittance of 85% or more.
8. The display panel according to any one of claims 1 to 4, wherein each of the light emitting cells corresponds to one of the microlens cells.
9. A display device characterized by comprising the display panel according to any one of claims 1 to 8.
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| CN201910499937.0A CN110112322B (en) | 2019-06-11 | 2019-06-11 | Display panel and display device |
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| CN111628107B (en) * | 2020-06-08 | 2023-05-02 | 合肥维信诺科技有限公司 | Display panel |
| CN111668277B (en) * | 2020-06-24 | 2022-08-23 | 湖北长江新型显示产业创新中心有限公司 | Display device |
| CN111816787A (en) * | 2020-06-30 | 2020-10-23 | 合肥维信诺科技有限公司 | Display panel and display device |
| CN114093998B (en) * | 2022-01-21 | 2022-04-19 | 季华实验室 | Light emitting diode, display panel, display device and preparation method |
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| JP5341701B2 (en) * | 2009-10-02 | 2013-11-13 | キヤノン株式会社 | Display device and digital camera |
| JP5827104B2 (en) * | 2010-11-19 | 2015-12-02 | 株式会社半導体エネルギー研究所 | Lighting device |
| KR101861630B1 (en) * | 2011-11-02 | 2018-05-30 | 주성엔지니어링(주) | A light emitting device and a manufacturing method thereof |
| CN202549937U (en) * | 2012-05-10 | 2012-11-21 | 京东方科技集团股份有限公司 | Organic light-emitting diode (OLED) display structure and OLED display device |
| KR101837260B1 (en) * | 2013-05-23 | 2018-04-19 | 미쯔비시 케미컬 주식회사 | Optical film, method for producing optical film, and surface light-emitting body |
| US10620347B2 (en) * | 2014-06-13 | 2020-04-14 | Sony Corporation | Light-distribution adjustment sheet and display unit |
| KR102335812B1 (en) * | 2014-09-19 | 2021-12-09 | 삼성디스플레이 주식회사 | Organic light emitting diode device |
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