WO2021077592A1 - Oled 显示器件及显示装置 - Google Patents
Oled 显示器件及显示装置 Download PDFInfo
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- WO2021077592A1 WO2021077592A1 PCT/CN2019/126998 CN2019126998W WO2021077592A1 WO 2021077592 A1 WO2021077592 A1 WO 2021077592A1 CN 2019126998 W CN2019126998 W CN 2019126998W WO 2021077592 A1 WO2021077592 A1 WO 2021077592A1
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- 239000010410 layer Substances 0.000 claims description 286
- 239000012044 organic layer Substances 0.000 claims description 56
- 238000005538 encapsulation Methods 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 13
- 239000000758 substrate Substances 0.000 claims description 13
- 239000010409 thin film Substances 0.000 claims description 10
- 238000002834 transmittance Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 4
- 238000004806 packaging method and process Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 9
- 238000000605 extraction Methods 0.000 description 4
- 239000010408 film Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004049 embossing Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- -1 region Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
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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
- H10K59/80—Constructional details
- H10K59/875—Arrangements for extracting light from the devices
- H10K59/878—Arrangements for extracting light from the devices comprising reflective means
-
- 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
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/873—Encapsulations
-
- 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
-
- 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
- H10K50/856—Arrangements for extracting light from the devices comprising reflective means
-
- 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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
-
- 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
- H10K59/875—Arrangements for extracting light from the devices
- H10K59/879—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
-
- 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
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/844—Encapsulations
-
- 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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
- H10K77/10—Substrates, e.g. flexible substrates
- H10K77/111—Flexible substrates
Definitions
- the present invention relates to the field of display technology, in particular to an OLED display device and a display device.
- OLED Organic Light-Emitting Diode
- the OLED display device in the existing OLED display device includes two structures: a bottom-emission structure and a top-emission structure.
- the OLED display device includes a plurality of pixels arranged in an array, and each pixel is included on a substrate.
- An anode, a light-emitting layer, and a cathode are sequentially formed on the substrate.
- the holes migrate from the anode to the light-emitting layer and recombine with the electrons migrated from the cathode to excite the light-emitting material in the light-emitting layer to generate light.
- the light is emitted from the cathode to achieve top emission.
- the light generated by the light-emitting layer in the pixel diverges to the surroundings, in addition to the light emitted toward the anode, some light will be emitted from the side of the light-emitting layer, so that the light emitted from the light-emitting surface of the OLED display device (that is, from all pixels)
- the ratio of light emitted by the cathode of the OLED to the light generated by the light-emitting layer of all pixels (called the light output rate of the OLED display device) is relatively low, which makes the color shift of the display device larger and affects the display.
- the OLED display device in the prior art has a low light output rate and a large color shift.
- the present application provides an OLED display device and a display device.
- the present application provides an OLED display device, the OLED display device comprising a light-emitting layer, an encapsulation layer, and a turn-back layer disposed in the encapsulation layer, and the turn-back layer is used to refract light from the light-emitting layer Or reflection, so that the light can be emitted in a concentrated manner.
- the encapsulation layer includes a first inorganic layer, a second inorganic layer, and an organic layer disposed between the first inorganic layer and the second inorganic layer, and the first inorganic layer is disposed on the light-emitting layer ,
- the turn-back layer is disposed on the organic layer, and the second inorganic layer is located on the turn-back layer.
- the refractive index of the foldback layer is greater than that of the organic layer.
- the refractive index of the second inorganic layer is greater than or equal to the refractive index of the turn-back layer.
- the turn-back layer includes a plurality of turn-back portions, and the plurality of turn-back portions are arranged at intervals.
- a plurality of arc-shaped grooves are provided on a side of the organic layer away from the first inorganic layer, the turned-back portion is correspondingly provided in the arc-shaped groove, and the cross-section of the turned-back portion is an ellipse Or round.
- the OLED display device further includes a flexible substrate, a thin film transistor layer disposed on the flexible substrate, and a pixel definition layer disposed on the thin film transistor layer, and the pixel definition layer includes a plurality of spaced apart For pixels, the width of the folded portion is less than or equal to the opening distance of any two adjacent pixels.
- the turn-back portion is arranged above the openings of any two adjacent pixels.
- the light transmittance of the turn-back layer is greater than 90%.
- the material of the folded back layer is the same as that of the encapsulated organic layer.
- the present application also provides a display device.
- the display device in question includes an OLED display device.
- the OLED display device includes a light-emitting layer, an encapsulation layer, and a foldback layer disposed in the encapsulation layer. To refract or reflect the light from the light-emitting layer so that the light can be emitted in a concentrated manner.
- the encapsulation layer includes a first inorganic layer, a second inorganic layer, and an organic layer disposed between the first inorganic layer and the second inorganic layer, and the first inorganic layer is disposed on the light-emitting layer ,
- the turn-back layer is disposed on the organic layer, and the second inorganic layer is located on the turn-back layer.
- the refractive index of the foldback layer is greater than that of the organic layer.
- the refractive index of the second inorganic layer is greater than or equal to the refractive index of the turn-back layer.
- the turn-back layer includes a plurality of turn-back portions, and the plurality of turn-back portions are arranged at intervals.
- a plurality of arc-shaped grooves are provided on a side of the organic layer away from the first inorganic layer, the turned-back portion is correspondingly provided in the arc-shaped groove, and the cross-section of the turned-back portion is an ellipse Or round.
- the OLED display device further includes a flexible substrate, a thin film transistor layer disposed on the flexible substrate, and a pixel definition layer disposed on the thin film transistor layer, and the pixel definition layer includes a plurality of spaced apart For pixels, the width of the folded portion is less than or equal to the opening distance of any two adjacent pixels.
- the turn-back portion is arranged above the openings of any two adjacent pixels.
- the light transmittance of the turn-back layer is greater than 90%.
- the material of the folded back layer is the same as that of the encapsulated organic layer.
- the present invention adds a turn-back layer to the encapsulation layer of the OLED display device, and the turn-back layer can change the light path diverging to the surroundings, so that the light emitted by the light-emitting layer of the OLED display device is in the middle of the turn-back layer. Refraction or reflection is performed under the action, and finally the light is concentrated and emitted in the center, thereby improving the light extraction efficiency of the front angle of the OLED display device.
- FIG. 1 is a schematic structural diagram of an embodiment of an OLED display device provided by the present invention.
- FIG. 2 is a schematic structural diagram of another embodiment of an OLED display device provided by the present invention.
- FIG. 3 is a schematic structural diagram of another embodiment of an OLED display device provided by the present invention.
- FIG. 4 is a schematic structural diagram of another embodiment of an OLED display device provided by the present invention.
- FIG. 1 it is a schematic structural diagram of an embodiment of an OLED display device provided by the present invention, which includes a light-emitting layer 10, an encapsulation layer 11, and a foldback layer 12 arranged in the encapsulation layer.
- the foldback layer 12 is used to The light from the light-emitting layer is refracted or reflected, so that the light can be emitted in a concentrated and centered manner.
- the foldback layer can change the light path diverging to the surroundings, so that the light emitted by the light-emitting layer of the OLED display device is refracted or reflected under the action of the foldback layer. Finally, the light is concentrated and emitted in the center, thereby improving the light extraction efficiency of the front angle of the OLED display device.
- the OLED display device further includes a flexible substrate, a thin film transistor layer provided on the flexible substrate, and a pixel definition layer 13 provided on the thin film transistor layer,
- the pixel definition layer 13 includes a plurality of R, G, and B pixels, and the R, G, and B pixel units are arranged at intervals. There is a certain distance b between any two adjacent pixels, that is, between any two adjacent pixels. The opening distance is b.
- the encapsulation layer 11 is used to encapsulate the OLED display device.
- the encapsulation layer 11 includes a first encapsulation organic layer 110, a first encapsulation inorganic layer 111, and a second encapsulation inorganic layer 112.
- the first encapsulation inorganic layer 111 is located under the turn-back layer 12
- the second encapsulated inorganic layer 112 is located above the turn-back layer 12
- the first encapsulated organic layer 110 is located between the first encapsulated inorganic layer 111 and the second encapsulated inorganic layer 112.
- the first encapsulating inorganic layer 111 is disposed above the light-emitting layer 10 to protect the light-emitting layer 10.
- the first encapsulating organic layer 110 is located above the first encapsulating inorganic layer 111, and a groove is provided on the first encapsulating organic layer 110, and the turn-back layer 12 is arranged upside down in the groove of the first encapsulating organic layer 110.
- the refractive index n1 of the turn-back layer 12 is greater than the refractive index n2 of the first encapsulating organic layer 110.
- the refractive index n3 of the second encapsulating inorganic layer 112 is greater than or equal to the refractive index n1 of the folded layer 12. Specifically, the refractive index n3 of the second encapsulating inorganic layer 112 is greater than the refractive index n1 of the folding layer 12; or the refractive index n3 of the second encapsulating inorganic layer 112 is equal to the refractive index n1 of the folding layer 12.
- the OLED display device provided by the embodiment of the present invention, after the light-emitting layer 10 emits light, a part of the display light is directly emitted, and a part of the display light reaches the junction of the first encapsulated organic layer 110 and the foldback layer 12, due to the refraction of the foldback layer 12.
- the rate n1 is greater than the refractive index n2 of the first encapsulated organic layer 110, so the light will be refracted after entering the refolding layer 12, and the direction of the light will be deflected toward the center, so that the light can be emitted in the center, thereby increasing the efficiency of the OLED display device. Light extraction rate.
- the refractive index n3 of the second encapsulating inorganic layer 112 is greater than the refractive index n1 of the refolding layer 12, when the light reaches the boundary between the refolding layer 12 and the second encapsulating inorganic layer 112, due to the refraction of the second encapsulating inorganic layer 112
- the rate n3 is greater than the refractive index n1 of the refolding layer 12, the light will be refracted after entering the second encapsulated inorganic layer 112, and the direction of the light will be further deflected toward the center, so that the light can be further concentrated and emitted in the center, thus increasing the OLED Display the light output rate of the device.
- the refractive index n3 of the second encapsulated inorganic layer 112 is equal to the refractive index n1 of the refolding layer 12, the light will not be refracted when it reaches the boundary between the refolding layer 12 and the second encapsulated inorganic layer 112, and will be directly emitted. Compared with the direction of the light entering the folding layer 12, the direction has been refracted, and the light will be emitted in the center and concentrated, which increases the light output rate of the OLED display device compared with the prior art.
- the light transmittance of the turn-back layer is greater than 90%.
- the turn-back layer 12 may include a plurality of turn-back portions, the plurality of turn-back portions are arranged at intervals, and the cross-section of the turn-back portions is oval or circular.
- a plurality of arc-shaped grooves are provided on the side of the first encapsulated organic layer 110 away from the first encapsulated inorganic layer 111, and the plurality of arc-shaped grooves are elliptical or circular.
- the turn-back portions are arranged upside down on the encapsulation organic layer, and the turn-back portions and the grooves are arranged in a one-to-one correspondence.
- the width a of the folded portion is less than or equal to the opening distance b between any two adjacent pixels in the OLED display device.
- the width a of the folded portion is smaller than the opening distance b between any two adjacent pixels in the OLED display device; or the width a of the folded portion is equal to the opening distance b between any two adjacent pixels in the OLED display device.
- the turn-back portion is arranged above the openings of any two adjacent pixels of the pixel definition layer 13.
- the turn-back layer 12 may also be disposed above the first encapsulating organic layer 110, as shown in FIG. 2, which is a schematic structural diagram of another embodiment of the OLED display device provided by the present invention.
- the refractive index n1 of the turn-back layer 12 is greater than the refractive index n2 of the first encapsulating organic layer 110.
- the refractive index n3 of the second encapsulating inorganic layer 112 is greater than or equal to the refractive index n1 of the folded layer 12. Specifically, the refractive index n3 of the second encapsulating inorganic layer 112 is greater than the refractive index n1 of the folding layer 12; or the refractive index n3 of the second encapsulating inorganic layer 112 is equal to the refractive index n1 of the folding layer 12.
- the OLED display device provided by the embodiment of the present invention, after the light-emitting layer 10 emits light, a part of the display light is directly emitted, and a part of the display light reaches the junction of the first encapsulated organic layer 110 and the foldback layer 12, due to the refraction of the foldback layer 12.
- the rate n1 is greater than the refractive index n2 of the first encapsulated organic layer 110, so the light will be refracted after entering the refolding layer 12, and the direction of the light will be deflected toward the center, so that the light can be emitted in the center, thereby increasing the efficiency of the OLED display device. Light extraction rate.
- the refractive index n3 of the second encapsulating inorganic layer 112 is greater than the refractive index n1 of the refolding layer, when the light reaches the boundary between the refolding layer 12 and the second encapsulating inorganic layer 112, the refractive index of the second encapsulating inorganic layer 112 n3 is greater than the refractive index n1 of the refolding layer 12, the light will be refracted after entering the second encapsulated inorganic layer 112, and the direction of the light will be further deflected toward the center, so that the light can be further concentrated and emitted in the center, thus increasing the OLED display The light output rate of the device.
- the refractive index n3 of the second encapsulated inorganic layer 112 is equal to the refractive index n1 of the refolding layer 12, the light will not be refracted when it reaches the boundary between the refolding layer 12 and the second encapsulated inorganic layer 112, and will be directly emitted. Compared with the direction of the light entering the folding layer 12, the direction has been refracted, and the light will be emitted in the center and concentrated, which increases the light output rate of the OLED display device compared with the prior art.
- the light transmittance of the turn-back layer 12 is greater than 90%.
- the turn-back layer 12 may include a plurality of turn-back portions, the plurality of turn-back portions are arranged at intervals, and the cross-section of the turn-back portions is oval or circular.
- a plurality of folded portions are arranged above the first encapsulated organic layer 110, and the elliptical or circular cross section of the folded layer 12 is arranged away from the first encapsulated organic layer 110.
- the width a of the folded portion is less than or equal to the opening distance b between any two adjacent pixels in the OLED display device.
- the width a of the folded portion is smaller than the opening distance b between any two adjacent pixels in the OLED display device; or the width a of the folded portion is equal to the opening distance b between any two adjacent pixels in the OLED display device.
- the turn-back portion is arranged above the openings of any two adjacent pixels of the pixel definition layer 13.
- the folded layer 12 may be made of organic materials, which may be commonly used insulating structure materials.
- the insulating structure made of this material has the advantages of uniform film thickness and small refractive index error.
- the turn-back layer can be prepared by embossing.
- the turn-back layer and the encapsulating organic layer may be made of the same material, or may be made of different materials.
- FIG. 3 it is a schematic structural diagram of another embodiment of an OLED display device provided by the present invention.
- the encapsulation layer 11 of the OLED display device may also include a first encapsulation inorganic layer 310, a first encapsulation organic layer 311, and a second encapsulation layer.
- the encapsulation layer 11 is alternately arranged on the light-emitting layer of the OLED display device in the order of the first encapsulation inorganic layer 310, the first encapsulation organic layer 311, the second encapsulation inorganic layer 312, the second encapsulation organic layer 313, and the third encapsulation inorganic layer 314. 10 above.
- the turn-back layer 12 may be disposed in the second encapsulated organic layer 313, as shown in FIG. 3, which is a schematic diagram of the third implementation of the OLED display device provided by the present invention; at this time, the second encapsulated organic layer 313 A groove is provided thereon, and the turn-back layer 12 is arranged upside down in the groove of the second encapsulating organic layer 313.
- the refractive index n1 of the turn-back layer 12 is greater than the refractive index n4 of the second encapsulating organic layer 313.
- the refractive index n5 of the third encapsulating inorganic layer 314 is greater than or equal to the refractive index n1 of the folding layer 12. Specifically, the refractive index n5 of the third encapsulating inorganic layer 314 is greater than the refractive index n1 of the folding layer 12; or the refractive index n5 of the third encapsulating inorganic layer 314 is equal to the refractive index n1 of the folding layer 12.
- the OLED display device provided by the above embodiment, after the light-emitting layer 10 emits light, a part of the display light is directly emitted, and a part of the display light reaches the junction of the second encapsulated organic layer 313 and the return layer, due to the refractive index of the return layer 12 n1 is greater than the refractive index n4 of the second encapsulated organic layer 313, so the light will be refracted after entering the folding layer 12, and the direction of the light will be deflected toward the center, so that the light can be emitted in the center, thereby increasing the light output of the OLED display device rate.
- the refractive index n5 of the third encapsulating inorganic layer 314 is greater than the refractive index n1 of the refolding layer 12, when the light reaches the boundary between the refolding layer 12 and the third encapsulating inorganic layer 314, it will be caused by the refraction of the third encapsulating inorganic layer 314.
- the rate n5 is greater than the refractive index n1 of the refolding layer 12, the light will be refracted after entering the third encapsulated inorganic layer 314, and the light direction will be further deflected toward the center, so that the light can be further concentrated and emitted in the center, thus increasing the OLED Display the light output rate of the device.
- the refractive index n5 of the third encapsulated inorganic layer 314 is equal to the refractive index n1 of the refolding layer 12, the light will not be refracted when it reaches the boundary between the refolding layer 12 and the third encapsulated inorganic layer 314, and will be directly emitted. Compared with the direction of the light entering the folding layer 12, the direction has been refracted, and the light will be emitted in the center and concentrated, which increases the light output rate of the OLED display device compared with the prior art.
- the light transmittance of the turn-back layer 12 is greater than 90%.
- the turn-back layer 12 may include a plurality of turn-back portions, the plurality of turn-back portions are arranged at intervals, and the cross-section of the turn-back portions is oval or circular.
- a plurality of grooves are provided on the second encapsulating organic layer 313, and the plurality of grooves are elliptical or circular.
- a plurality of turned-back portions are arranged upside down on the second encapsulating organic layer 313, and the plurality of turned-back portions are arranged in a one-to-one correspondence with the plurality of grooves.
- the width a of the folded portion is less than or equal to the opening distance b between any two adjacent pixels in the OLED display device.
- the width a of the folded portion is smaller than the opening distance b between any two adjacent pixels in the OLED display device; or the width a of the folded portion is equal to the opening distance b between any two adjacent pixels in the OLED display device.
- turn-back layer 12 is arranged above the openings of any two adjacent pixels of the pixel definition layer 13.
- the turn-back layer 12 may also be disposed above the second encapsulating organic layer 313, as shown in FIG. 4, which is a schematic structural diagram of another embodiment of the OLED display device provided by the present invention.
- the refractive index n1 of the turn-back layer 12 is greater than the refractive index n4 of the second encapsulating organic layer 313.
- the refractive index n5 of the third encapsulating inorganic layer 314 is greater than or equal to the refractive index n1 of the folding layer 12.
- the refractive index n5 of the third encapsulating inorganic layer 314 is greater than the refractive index n1 of the folding layer 12; or the refractive index n5 of the third encapsulating inorganic layer 314 is equal to the refractive index n1 of the folding layer 12.
- the OLED display device provided by the embodiment of the present invention, after the light-emitting layer 10 emits light, a part of the display light is directly emitted, and a part of the display light reaches the junction of the second encapsulated organic layer 313 and the foldback layer 12, due to the refraction of the foldback layer 12.
- the rate n1 is greater than the refractive index n4 of the second encapsulated organic layer 313, so the light will be refracted after entering the refolding layer 12, and the direction of the light will be deflected toward the center, so that the light can be emitted in the center, thereby increasing the efficiency of the OLED display device. Light out rate.
- the refractive index n5 of the third encapsulating inorganic layer 313 is greater than the refractive index n1 of the refolding layer 12, when the light reaches the boundary between the refolding layer 12 and the third encapsulating inorganic layer 314, it will be caused by the refraction of the third encapsulating inorganic layer 314. If the rate n5 is greater than the refractive index n1 of the refolding layer 12, the light will be refracted after entering the third encapsulated inorganic layer 314, and the direction of the light will be further deflected toward the center, so that the light can be further concentrated and emitted in the center, thus increasing the OLED Display the light output rate of the device.
- the refractive index n5 of the third encapsulated inorganic layer 314 is equal to the refractive index n1 of the refolding layer 12, the light will not be refracted when it reaches the boundary between the refolding layer 12 and the third encapsulated inorganic layer 314, and will be directly emitted. Compared with the direction of the light entering the folding layer 12, the direction has been refracted, and the light will be emitted in the center and concentrated, which increases the light output rate of the OLED display device compared with the prior art.
- the light transmittance of the turn-back layer is greater than 90%.
- the folded layer 12 may include a plurality of folded portions, the plurality of folded portions are arranged at intervals, and the cross section of the folded layer 12 is elliptical or circular.
- a plurality of folded portions are disposed above the second encapsulated organic layer 313, and the elliptical or circular cross section of the folded layer 12 is disposed away from the encapsulated organic layer.
- the folded layer 12 may be made of organic materials, which may be commonly used insulating structure materials.
- the insulating structure made of this material has the advantages of uniform film thickness and small refractive index error.
- the turn-back layer can be prepared by embossing.
- the turn-back layer 12 and the second encapsulation organic layer 313 may be made of the same material, or may be made of different materials.
- the width a of the folded portion is less than or equal to the opening distance b between any two adjacent pixels in the OLED device.
- the turn-back portion is provided above the openings of any two adjacent pixels of the pixel definition layer 13.
- the present invention also provides a display device, including the OLED display device as described above.
- the present invention adds a foldback layer to the packaging layer of the OLED display device.
- the foldback layer can change the light path diverging to the surroundings, so that the OLED display device is The light emitted by the light-emitting layer is refracted or reflected under the action of the folding layer, and finally the light is emitted in a concentrated and centered manner, thereby improving the light-emitting efficiency of the front angle of the OLED display device.
- a display device which includes the above-mentioned OLED display device.
- the working principle of the display device provided in this embodiment is consistent with the working principle of the aforementioned OLED display device embodiment.
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Abstract
本发明提供一种OLED显示器件,通过在OLED显示器件的封装层中增加一折返层,通过调整该折返层的与封装层的折射率,使得折返层可以改变向四周发散的光线路径,使得OLED显示器件的发光层发出的光线在折返层的作用下进行折射或者反射,最后将光线集中居中发出,进而提高OLED显示器件正面角度的出光效率。
Description
本发明涉及显示技术领域,尤其涉及一种OLED显示器件及显示装置。
OLED(Organic Light-Emitting Diode,有机发光二极管)显示装置与传统的液晶显示装置相比,除了更轻薄外,更具有自发光、低功耗、不需要背光源、无视角限制及高速反应速率等优点。
现有的OLED显示装置中的OLED显示器件包括两种结构:底发射结构和顶发射结构,以顶发射结构为例,OLED显示器件包括多个阵列排布的像素,每个像素包括在衬底基板上依次形成的阳极、发光层、阴极。当在阳极和阴极之间施加电压时,空穴从阳极迁移至发光层,与阴极迁移来的电子复合,激发发光层中的发光材料,产生光线,光线从阴极射出,实现顶发射。
由于像素中发光层产生的光线会向四周发散,除了朝阳极方向射出的光线外,有部分光线会从发光层的侧面射出,这样,使得从OLED显示器件发光表面射出的光线(即从所有像素的阴极射出的光线)在所有像素发光层所产生的光线中所占的比例(称为OLED显示器件的出光率)较低,使得显示器件的色偏较大,影响显示。
现有技术下的OLED显示器件出光率较低,色偏较大,为了解决上述问题,本申请提供一种OLED显示器件及显示装置。
第一方面,本申请提供一种OLED显示器件,所述OLED显示器件包括发光层、封装层以及设置在所述封装层内的折返层,所述折返层用于对来自发光层的光线进行折射或者反射,使得光线可以集中射出。
进一步的,所述封装层包括第一无机层、第二无机层及设置在所述第一无机层和第二无机层之间的有机层,所述第一无机层设置在所述发光层上,所述折返层设置在所述有机层上,所述第二无机层位于所述折返层上。
进一步的,所述折返层的折射率大于有机层。
进一步的,所述第二无机层的折射率大于或等于所述折返层的折射率。
进一步的,所述折返层包括多个折返部,所述多个折返部间隔设置。
进一步的,所述有机层远离所述第一无机层的一侧设置有多个弧形凹槽,所述折返部对应设置在所述弧形凹槽内,所述折返部的横截面为椭圆或圆形。
进一步的,所述OLED显示器件还包括柔性基板,设置在所述柔性基板上的薄膜晶体管层、以及设置在所述薄膜晶体管层上的像素定义层,所述像素定义层包括多个间隔设置的像素,所述折返部的宽度小于或者等于任意两个相邻像素的开口距离。
进一步的,所述折返部设置在任意两个相邻像素的开口的上方。
进一步的,所述折返层的光线穿透度大于90%。
进一步的,所述折返层与所述封装有机层的材料相同。
第二方面,本申请还提供一种显示装置,所诉显示装置包括OLED显示器件,所述OLED显示器件包括发光层、封装层以及设置在所述封装层内的折返层,所述折返层用于对来自发光层的光线进行折射或者反射,使得光线可以集中射出。
进一步的,所述封装层包括第一无机层、第二无机层及设置在所述第一无机层和第二无机层之间的有机层,所述第一无机层设置在所述发光层上,所述折返层设置在所述有机层上,所述第二无机层位于所述折返层上。
进一步的,所述折返层的折射率大于有机层。
进一步的,所述第二无机层的折射率大于或等于所述折返层的折射率。
进一步的,所述折返层包括多个折返部,所述多个折返部间隔设置。
进一步的,所述有机层远离所述第一无机层的一侧设置有多个弧形凹槽,所述折返部对应设置在所述弧形凹槽内,所述折返部的横截面为椭圆或圆形。
进一步的,所述OLED显示器件还包括柔性基板,设置在所述柔性基板上的薄膜晶体管层、以及设置在所述薄膜晶体管层上的像素定义层,所述像素定义层包括多个间隔设置的像素,所述折返部的宽度小于或者等于任意两个相邻像素的开口距离。
进一步的,所述折返部设置在任意两个相邻像素的开口的上方。
进一步的,所述折返层的光线穿透度大于90%。
进一步的,所述折返层与所述封装有机层的材料相同。
本发明的有益效果为:本发明通过在OLED显示器件的封装层中增加一折返层,所述折返层可以改变向四周发散的光线路径,使得OLED显示器件的发光层发出的光线在折返层的作用下进行折射或者反射,最后使得光线集中居中发出,进而提高OLED显示器件正面角度的出光效率。
为了更清楚地说明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单介绍,显而易见地,下面描述中的附图仅仅是发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本发明提供的OLED显示器件一实施例结构示意图;
图2为本发明提供的OLED显示器件另一实施例结构示意图;
图3为本发明提供的OLED显示器件另一实施例结构示意图;
图4为本发明提供的OLED显示器件另一实施例结构示意图。
以下各实施例的说明是参考附加的图示,用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语,例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等,仅是参考附加图式的方向。因此,使用的方向用语是用以说明及理解本发明,而非用以限制本发明。在图中,结构相似的单元是用以相同标号表示。
附图和说明被认为在本质上是示出性的,而不是限制性的。在图中,结构相似的单元是用以相同标号表示。另外,为了理解和便于描述,附图中示出的每个组件的尺寸和厚度都是任意示出的,但是本发明不限于此。
在附图中,为了清晰起见,夸大了层、膜、面板、区域等的厚度。在附图中,为了理解方便和便于描述,夸大了一些层和区域的厚度。需要说明的是,当例如层、膜、区域或基底的组件被称作“在”另一组件“上”时。所述组件可以直接在所述另一组件上,或者也可以存在中间组件。
另外,在说明书中,除非明确地描述为相反的,否则词语“包括”将被理解为意指包括所述组件,但是不排除任何其他组件。此外在说明书中,“在……上”意指位于目标组件上方或者下方,而不意指必须位于基于重力方向的顶部上。
为更进一步阐述本发明为达成预定发明所采取的技术手段及功效,以下结合附图及较佳实施例,对依据本发明OLED显示器件及显示装置,其具体说明如下。
如图1所示,为本发明提供的OLED显示器件一实施例结构示意图,包括发光层10、封装层11以及设置在所述封装层内的折返层12,所述折返层12用于对来自发光层的光线进行折射或者反射,使得光线可以集中居中射出。
本发明通过在OLED显示器件的封装层中增加一折返层,所述折返层可以改变向四周发散的光线路径,使得OLED显示器件的发光层发出的光线在折返层的作用下进行折射或者反射,最后使得光线集中居中发出,进而提高OLED显示器件正面角度的出光效率。
需要说明的是,上述OLED显示器件实施例中仅描述了上述结构,有些必要的现有技术结构未进行详细描述,可以理解的是,除了上述结构之外,本发明实施例OLED显示器件中,还可以根据需要包括任何其他的必要结构,例如在本发明实施例中,OLED显示器件还包括柔性基板,设置在柔性基板上的薄膜晶体管层,以及设置在薄膜晶体管层上的像素定义层13,像素定义层13包括多个R、G、B像素,且R、G、B多个像素单元间隔设置,任意相邻两个像素之间存在一定的距离b,即任意相邻两个像素之间的开口距离为b。
本发明提供的实施例中,封装层11用于对OLED显示器件进行封装,封装层11包括第一封装有机层110、第一封装无机层111和第二封装无机层112,第一封装无机层111位于折返层12下方,第二封装无机层112位于折返层12上方,第一封装有机层110位于第一封装无机层111和第二封装无机层112之间。
具体的,第一封装无机层111设置在发光层10上方,用以保护发光层10。第一封装有机层110位于第一封装无机层111上方,且第一封装有机层110上设置有凹槽,折返层12倒置设置在第一封装有机层110的凹槽中。
在本发明实施例中,折返层12的折射率n1大于第一封装有机层110的折射率n2。
同时,第二封装无机层112的折射率n3大于或者等于折返层12的折射率n1。具体的,第二封装无机层112的折射率n3大于折返层12的折射率n1;或者第二封装无机层112的折射率n3等于折返层12的折射率n1。
本发明实施例提供的OLED显示器件中,当发光层10发射出光线后,一部分显示光线直接射出,一部分显示光线到达第一封装有机层110与折返层12的交界处,由于折返层12的折射率n1大于第一封装有机层110的折射率n2,所以光线在进入折返层12后会发生折射,光线方向向着居中的方向偏折,使得光线可以集中居中射出,从而增大了OLED显示器件的出光率。
进一步的,若第二封装无机层112的折射率n3大于折返层12的折射率n1,则光线到达折返层12与第二封装无机层112的交界处时,由于第二封装无机层112的折射率n3大于折返层12的折射率n1,则光线在进入第二封装无机层112后会发生折射,光线方向向着居中的方向进一步偏折,使得光线可以进一步的集中居中射出,因此增大了OLED显示器件的出光率。
若第二封装无机层112的折射率n3等于折返层12的折射率n1,则光线到达折返层12与第二封装无机层112的交界处时不会发生折射,直接射出,但此时的光线方向相比射入折返层12的光线方向相比,已经发生折射,光线会居中集中射出,对比现有技术增大了OLED显示器件的出光率。
在本发明所提供的实施例中,该折返层的光线穿透度大于90%。
在上述实施例提供的OLED显示器件中,折返层12可以包括有多个折返部,多个折返部间隔设置,折返部的横截面为椭圆或圆形。
同时在第一封装有机层110远离第一封装无机层111的一侧设置有多个弧状凹槽,且多个弧状凹槽为椭圆或者圆形。多个折返部倒置设置在封装有机层上,且多个折返部与多个凹槽一一对应设置。
在本发明提供的实施例中,折返部的宽度a小于或者等于OLED 显示器件中任意相邻两个像素之间的开口距离b。
具体的,折返部的宽度a小于OLED 显示器件中任意相邻两个像素之间的开口距离b;或者折返部的宽度a等于OLED 显示器件中任意相邻两个像素之间的开口距离b。且折返部设置在像素定义层13的任意两个相邻像素的开口的上方。
在本发明的其他实施例中,折返层12也可以设置在第一封装有机层110的上方,如图2所示,为本发明提供的OLED显示器件另一实施例结构示意图。
在本发明该实施例中,折返层12的折射率n1大于第一封装有机层110的折射率n2。
同时,第二封装无机层112的折射率n3大于或者等于折返层12的折射率n1。具体的,第二封装无机层112的折射率n3大于折返层12的折射率n1;或者第二封装无机层112的折射率n3等于折返层12的折射率n1。
本发明实施例提供的OLED显示器件中,当发光层10发射出光线后,一部分显示光线直接射出,一部分显示光线到达第一封装有机层110与折返层12的交界处,由于折返层12的折射率n1大于第一封装有机层110的折射率n2,所以光线在进入折返层12后会发生折射,光线方向向着居中的方向偏折,使得光线可以集中居中射出,从而增大了OLED显示器件的出光率。
进一步的,若第二封装无机层112的折射率n3大于折返层的折射率n1,则光线到达折返层12与第二封装无机层112的交界处时,由于第二封装无机层112的折射率n3大于折返层12的折射率n1,则光线在进入第二封装无机层112后会发生折射,光线方向向着居中的方向进一步偏折,使得光线可以进一步的集中居中射出,因此增大了OLED显示器件的出光率。
若第二封装无机层112的折射率n3等于折返层12的折射率n1,则光线到达折返层12与第二封装无机层112的交界处时不会发生折射,直接射出,但此时的光线方向相比射入折返层12的光线方向相比,已经发生折射,光线会居中集中射出,对比现有技术增大了OLED显示器件的出光率。
在本发明所提供的实施例中,该折返层12的光线穿透度大于90%。
在上述实施例提供的OLED显示器件中,折返层12可以包括有多个折返部,多个折返部间隔设置,折返部的横截面为椭圆或圆形。
且多个折返部设置在第一封装有机层110上方,折返层12的椭圆形或圆形横截面远离第一封装有机层110设置。
在上述实施例中,折返部的宽度a小于或者等于OLED 显示器件中任意相邻两个像素之间的开口距离b。
具体的,折返部的宽度a小于OLED 显示器件中任意相邻两个像素之间的开口距离b;或者折返部的宽度a等于OLED 显示器件中任意相邻两个像素之间的开口距离b。且折返部设置在像素定义层13的任意两个相邻像素的开口的上方。
上述实施例提供的OLED显示器件中,折返层12可由有机材料制成,有机材料可以是常用的绝缘结构材料,该材料制成的绝缘结构具有膜厚均匀,折射率误差小的优点。且折返层可以通过压印的方式制备得到。
在本发明实施例中,折返层与封装有机层可以由相同材料制成,也可以由不同材料制成。
如图3所示,为本发明提供的OLED显示器件的另一实施例结构示意图,该OLED显示器件的封装层11还可以包括第一封装无机层310、第一封装有机层311、第二封装无机层312、第二封装有机层313、第三封装无机层314。封装层11按照第一封装无机层310、第一封装有机层311、第二封装无机层312、第二封装有机层313、第三封装无机层314的顺序交替设置在该OLED显示器件的发光层10上方。
在本发明的一些实施例中,折返层12可以设置在第二封装有机层313中,如图3所示,为本发明提供的OLED显示器件第三实施示意图;此时第二封装有机层313上设置有凹槽,折返层12倒置设置在第二封装有机层313的凹槽中。
在本发明实施例中,折返层12的折射率n1大于第二封装有机层313的折射率n4。
同时,第三封装无机层314的折射率n5大于或者等于折返层12的折射率n1。具体的,第三封装无机层314的折射率n5大于折返层12的折射率n1;或者第三封装无机层314的折射率n5等于折返层12的折射率n1。
在上述实施例提供的OLED显示器件中,当发光层10发射出光线后,一部分显示光线直接射出,一部分显示光线到达第二封装有机层313与折返层的交界处,由于折返层12的折射率n1大于第二封装有机层313的折射率n4,所以光线在进入折返层12后会发生折射,光线方向向着居中的方向偏折,使得光线可以集中居中射出,从而增大了OLED显示器件的出光率。
进一步的,若第三封装无机层314的折射率n5大于折返层12的折射率n1,则光线到达折返层12与第三封装无机层314的交界处时,由于第三封装无机层314的折射率n5大于折返层12的折射率n1,则光线在进入第三封装无机层314后会发生折射,光线方向向着居中的方向进一步偏折,使得光线可以进一步的集中居中射出,因此增大了OLED显示器件的出光率。
若第三封装无机层314的折射率n5等于折返层12的折射率n1,则光线到达折返层12与第三封装无机层314的交界处时不会发生折射,直接射出,但此时的光线方向相比射入折返层12的光线方向相比,已经发生折射,光线会居中集中射出,对比现有技术增大了OLED显示器件的出光率。
在本发明所提供的实施例中,该折返层12的光线穿透度大于90%。
在上述实施例提供的OLED显示器件中,折返层12可以包括有多个折返部,多个折返部间隔设置,折返部的横截面为椭圆或圆形。
同时在第二封装有机层313上设置有多个凹槽,且多个凹槽为椭圆或者圆形。多个折返部倒置设置在第二封装有机层313上,且多个折返部与多个凹槽一一对应设置。
在本发明提供的实施例中,折返部的宽度a小于或者等于OLED 显示器件中任意相邻两个像素之间的开口距离b。
具体的,折返部的宽度a小于OLED 显示器件中任意相邻两个像素之间的开口距离b;或者折返部的宽度a等于OLED 显示器件中任意相邻两个像素之间的开口距离b。
且折返层12设置在像素定义层13的任意两个相邻像素的开口的上方。
在本发明的其他实施例中,折返层12也可以设置在第二封装有机层313的上方,如图4所示,为本发明提供的OLED显示器件另一实施例结构示意图。
在本发明该实施例中,折返层12的折射率n1大于第二封装有机层313的折射率n4。
同时,第三封装无机层314的折射率n5大于或者等于折返层12的折射率n1。
具体的,第三封装无机层314的折射率n5大于折返层12的折射率n1;或者第三封装无机层314的折射率n5等于折返层12的折射率n1。
本发明实施例提供的OLED显示器件中,当发光层10发射出光线后,一部分显示光线直接射出,一部分显示光线到达第二封装有机层313与折返层12的交界处,由于折返层12的折射率n1大于第二封装有机层313的折射率n4,所以光线在进入折返层12后会发生折射,光线方向向着居中的方向偏折,使得光线可以集中居中射出,从而增大了OLED显示器件的出光率。
进一步的,若第三封装无机层313的折射率n5大于折返层12的折射率n1,则光线到达折返层12与第三封装无机层314的交界处时,由于第三封装无机层314的折射率n5大于折返层12的折射率n1,则光线在进入第三封装无机层314后会发生折射,光线方向向着居中的方向进一步偏折,使得光线可以进一步的集中居中射出,因此增大了OLED显示器件的出光率。
若第三封装无机层314的折射率n5等于折返层12的折射率n1,则光线到达折返层12与第三封装无机层314的交界处时不会发生折射,直接射出,但此时的光线方向相比射入折返层12的光线方向相比,已经发生折射,光线会居中集中射出,对比现有技术增大了OLED显示器件的出光率。
在本发明所提供的实施例中,该折返层的光线穿透度大于90%。
在上述实施例提供的OLED显示器件中,折返层12可以包括有多个折返部,多个折返部间隔设置,折返层12的横截面为椭圆或圆形。
且多个折返部设置在第二封装有机层313上方,折返层12的椭圆形或圆形横截面远离封装有机层设置。
上述实施例提供的OLED显示器件中,折返层12可由有机材料制成,有机材料可以是常用的绝缘结构材料,该材料制成的绝缘结构具有膜厚均匀,折射率误差小的优点。且折返层可以通过压印的方式制备得到。
在本发明实施例中,折返层12与第二封装有机层313可以由相同材料制成,也可以由不同材料制成。
在本发明提供的实施例中,折返部的宽度a小于或者等于OLED 器件中任意相邻两个像素之间的开口距离b。同时,折返部设置在像素定义层13的任意两个相邻像素的开口的上方。
本发明还提供一种显示装置,包括如上所述的OLED显示器件,本发明通过在OLED显示器件的封装层中增加一折返层,折返层可以改变向四周发散的光线路径,使得OLED显示器件的发光层发出的光线在折返层的作用下进行折射或者反射,最后使得光线集中居中发出,进而提高OLED显示器件正面角度的出光效率。
根据本发明的上述目的,提出一种显示装置,包括上述的OLED显示器件。本实施例提供的显示装置的工作原理,与前述OLED显示器件的实施例工作原理一致,具体结构关系及工作原理参见前述OLED显示器件实施例,此处不再赘述。
综上所述,虽然本发明已以优选实施例揭露如上,但上述优选实施例并非用以限制本发明,本领域的普通技术人员,在不脱离本发明的精神和范围内,均可作各种更动与润饰,因此本发明的保护范围以权利要求界定的范围为准。
Claims (20)
- 一种OLED显示器件,其中,所述OLED显示器件包括发光层、封装层以及设置在所述封装层内的折返层,所述折返层用于对来自发光层的光线进行折射或者反射,使得光线可以集中射出。
- 根据权利要求1所述的OLED显示器件,其中,所述封装层包括第一无机层、第二无机层及设置在所述第一无机层和第二无机层之间的有机层,所述第一无机层设置在所述发光层上,所述折返层设置在所述有机层上,所述第二无机层位于所述折返层上。
- 根据权利要求2所述的OLED显示器件,其中,所述折返层的折射率大于有机层。
- 根据权利要求2所述的OLED显示器件,其中,所述第二无机层的折射率大于或等于所述折返层的折射率。
- 根据权利要求2所述的OLED显示器件,其中,所述折返层包括多个折返部,所述多个折返部间隔设置。
- 根据权利要求5所述的OLED显示器件,其中,所述有机层远离所述第一无机层的一侧设有多个弧状凹槽,所述折返部对应设置在所述弧状凹槽内,所述折返部的横截面为椭圆或圆形。
- 根据权利要求5所述的OLED显示器件,其中,所述OLED显示器件还包括柔性基板,设置在所述柔性基板上的薄膜晶体管层、以及设置在所述薄膜晶体管层上的像素定义层,所述像素定义层包括多个间隔设置的像素,所述折返部的宽度小于或者等于任意两个相邻像素的开口距离。
- 根据权利要求7所述的OLED显示器件,其中,所述折返部设置在任意两个相邻像素的开口的上方。
- 根据权利要求1所述的OLED显示器件,其中,所述折返层的光线穿透度大于90%。
- 根据权利要求1所述的OLED显示器件,其中,所述折返层与所述有机层的材料相同。
- 一种显示装置,其中,所述显示装置包括OLED显示器件,所述OLED显示器件包括发光层、封装层以及设置在所述封装层内的折返层,所述折返层用于对来自发光层的光线进行折射或者反射,使得光线可以集中射出。
- 根据权利要求11所述的显示装置,其中,所述封装层包括第一无机层、第二无机层及设置在所述第一无机层和第二无机层之间的有机层,所述第一无机层设置在所述发光层上,所述折返层设置在所述有机层上,所述第二无机层位于所述折返层上。
- 根据权利要求12所述的显示装置,其中,所述折返层的折射率大于有机层。
- 根据权利要求12所述的显示装置,其中,所述第二无机层的折射率大于或等于所述折返层的折射率。
- 根据权利要求12所述的显示装置,其中,所述折返层包括多个折返部,所述多个折返部间隔设置。
- 根据权利要求15所述的显示装置,其中,所述有机层远离所述第一无机层的一侧设有多个弧状凹槽,所述折返部对应设置在所述弧状凹槽内,所述折返部的横截面为椭圆或圆形。
- 根据权利要求15所述的显示装置,其中,所述OLED显示器件还包括柔性基板,设置在所述柔性基板上的薄膜晶体管层、以及设置在所述薄膜晶体管层上的像素定义层,所述像素定义层包括多个间隔设置的像素,所述折返部的宽度小于或者等于任意两个相邻像素的开口距离。
- 根据权利要求17所述的显示装置,其中,所述折返部设置在任意两个相邻像素的开口的上方。
- 根据权利要求11所述的显示装置,其中,所述折返层的光线穿透度大于90%。
- 根据权利要求11所述的显示装置,其中,所述折返层与所述有机层的材料相同。
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