CN110729340B - Organic light-emitting display panel and display device - Google Patents
Organic light-emitting display panel and display device Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 2
- 208000008918 voyeurism Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- H—ELECTRICITY
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- 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
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
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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
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- H10K50/856—Arrangements for extracting light from the devices comprising reflective means
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Abstract
The invention discloses an organic light-emitting display panel and a display device, wherein a light path adjusting structure is arranged in sub-pixels of partial pixel units of the organic light-emitting display panel, an auxiliary layer of the light path adjusting structure deflects light emitted by a white light-emitting device to a reflecting layer, and the reflecting layer of the light path adjusting structure emits received light at a preset angle, so that the emitted light can be emitted at a large angle through the light path adjusting structure, the emergent light angle of the white light-emitting device is increased, and the large-angle display of the organic light-emitting display panel is realized.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to an organic light emitting display panel and a display device.
Background
An Organic Light Emitting Diode (OLED) is one of the hot spots in the research field of flat panel displays, and when a current flows through an OLED device, holes generated by an anode and electrons generated by a cathode are combined in a Light Emitting layer to release Light, and photons with different energies can be emitted according to different excitation energies, so that the Light corresponds to different colors. Compared with a Liquid Crystal Display (LCD), the OLED Display has the advantages of low power consumption, low production cost, self-luminescence, wide viewing angle, fast response speed, and the like. Currently, in the display fields of mobile phones, tablet computers, digital cameras, and the like, OLED displays have begun to replace traditional LCD displays.
Disclosure of Invention
The embodiment of the invention provides an organic light-emitting display panel and a display device, which are used for realizing large-angle and peep-proof display.
The embodiment of the invention provides an organic light-emitting display panel, which comprises a plurality of pixel units, wherein each pixel unit comprises a plurality of sub-pixels, and each sub-pixel comprises a white light-emitting device and a color filter positioned on the light-emitting side of the white light-emitting device; wherein, some sub-pixels of the pixel unit also comprise an optical path adjusting structure;
the optical path adjusting structure includes: the auxiliary layer is positioned on one side, back to the color filter, of the white light emitting device, and the reflecting layer is positioned on one side, facing the white light emitting device, of the color filter;
the auxiliary layer is used for deflecting the light emitted by the white light emitting device to the reflecting layer, and the reflecting layer is used for emitting the received light at a preset angle.
Optionally, in a specific implementation, in the organic light emitting display panel provided in the embodiment of the present invention, the preset angle includes a first preset angle and a second preset angle, and the light emitted from the first preset angle and the light emitted from the second preset angle are opposite in direction.
Optionally, in a specific implementation, in the organic light emitting display panel provided in the embodiment of the present invention, the light emitted at the first preset angle and the light emitted at the second preset angle are symmetrical in direction.
Optionally, in a specific implementation, in the organic light emitting display panel provided in the embodiment of the present invention, the pixel unit emitting light at the first preset angle is a first-type pixel unit, the pixel unit emitting light at the second preset angle is a second-type pixel unit, and the pixel unit without the light path adjusting structure is a third-type pixel unit;
the first type of pixel unit, the second type of pixel unit and the third type of pixel unit are arranged next to each other along the same direction to form a repeating unit of the organic light-emitting display panel.
Optionally, in a specific implementation manner, in the organic light emitting display panel provided in the embodiment of the present invention, the third type of pixel unit is located between the first type of pixel unit and the second type of pixel unit.
Optionally, in a specific implementation manner, in the organic light emitting display panel provided in the embodiment of the present invention, the reflective layer is located on a side of the color filter, which is close to the third type of pixel unit, and an orthographic projection area of the reflective layer on the substrate of the organic light emitting display panel accounts for 30% to 35% of an orthographic projection area of the color filter on the substrate of the organic light emitting display panel.
Optionally, in a specific implementation, in the organic light emitting display panel provided in the embodiment of the present invention, the thickness of the reflective layer gradually increases in a direction from the first type of pixel unit to the third type of pixel unit and in a direction from the second type of pixel unit to the third type of pixel unit.
Optionally, in a specific implementation manner, in the organic light emitting display panel provided in the embodiment of the present invention, an included angle between a surface of the reflective layer, which is in contact with the color filter, and an inclined plane of the reflective layer is 57 ° to 63 °.
Optionally, in a specific implementation manner, in the organic light emitting display panel provided in the embodiment of the present invention, the thickness of the auxiliary layer is gradually decreased in a direction from the first type of pixel unit to the third type of pixel unit and in a direction from the second type of pixel unit to the third type of pixel unit.
Optionally, in practical implementation, in the organic light emitting display panel provided in the embodiment of the present invention, an included angle between a surface of the auxiliary layer contacting the white light emitting device and a surface of the auxiliary layer contacting the substrate is 42 ° to 48 °.
Optionally, in a specific implementation, in the organic light emitting display panel provided in the embodiment of the present invention, the organic light emitting display panel further includes: the first data driving circuit is electrically connected with the first type of pixel units, the second data driving circuit is electrically connected with the second type of pixel units, and the third data driving circuit is electrically connected with the third type of pixel units; each data driving circuit is used for individually controlling the pixel units which are respectively and correspondingly electrically connected to emit light.
Correspondingly, the embodiment of the invention also provides a display device, which comprises the organic light-emitting display panel provided by the embodiment of the invention.
The invention has the following beneficial effects:
according to the organic light-emitting display panel and the display device provided by the embodiment of the invention, the light path adjusting structure is arranged in the sub-pixels of the partial pixel units of the organic light-emitting display panel, the auxiliary layer of the light path adjusting structure deflects light emitted by the white light-emitting device to the reflecting layer, and the reflecting layer of the light path adjusting structure emits received light at a preset angle, so that the emitted light can be emitted at a large angle through the light path adjusting structure, the emergent light angle of the white light-emitting device is increased, and the large-angle display of the organic light-emitting display panel is realized.
Drawings
Fig. 1 is a schematic structural diagram of an organic light emitting 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, specific embodiments of an organic light emitting display panel and a display device according to embodiments of the present invention are described in detail below with reference to the accompanying drawings.
The shape and size of each film layer in the drawings do not reflect the real scale of the organic light emitting display panel, and are only a partial structure of the organic electroluminescent display device, which is only for the purpose of schematically illustrating the present invention.
The invention discloses an organic light-emitting display panel, as shown in fig. 1, comprising a plurality of pixel units (such as P1, P2 and P3), wherein each pixel unit comprises a plurality of sub-pixels, and each sub-pixel comprises a white light-emitting device W and color filters (such as a red filter R, a green filter G and a blue filter B) positioned at the light-emitting side of the white light-emitting device W; the sub-pixels of the partial pixel units (such as P1 and P2) also comprise an optical path adjusting structure;
the optical path adjusting structure includes: an auxiliary layer 1 on the side of the white light emitting device W facing away from the color filter (R, G, B), and a reflective layer 2 on the side of the color filter (R, G, B) facing the white light emitting device W;
the auxiliary layer 1 is used for deflecting light emitted by the white light emitting device W to the reflective layer 2, and the reflective layer 2 is used for emitting received light at a preset angle.
In the organic light emitting display panel provided by the embodiment of the invention, the light path adjusting structure is arranged in the sub-pixels of part of the pixel units (such as P1 and P2), the auxiliary layer 1 of the light path adjusting structure deflects light emitted by the white light emitting device W to the reflective layer 2, and the reflective layer 2 of the light path adjusting structure emits received light at a preset angle, so that emitted light can be emitted at a large angle (shown by an arrow) through the light path adjusting structure, thereby increasing the emitting light angle of the white light emitting device W and realizing large-angle display of the organic light emitting display panel.
In a specific implementation, the reflective layer may be made of a metal material having a high transmittance, and the auxiliary layer may be made of a resin material.
Further, in order to increase the light emitting angle of the organic light emitting display panel as much as possible in practical implementation, in the organic light emitting display panel provided in the embodiment of the present invention, as shown in fig. 1, the preset angle includes a first preset angle θ 1 and a second preset angle θ 2, and the light emitted from the first preset angle θ 1 and the light emitted from the second preset angle θ 2 are opposite in direction.
Further, in practical implementation, in the organic light emitting display panel provided in the embodiment of the present invention, as shown in fig. 1, the light emitted from the first preset angle θ 1 and the light emitted from the second preset angle θ 2 are symmetrical in direction. Therefore, the auxiliary layer 1 and the reflecting layer 2 in the pixel unit emitting the light with opposite directions can adopt the same manufacturing process, and the complexity of the manufacturing process is reduced.
Further, in a specific implementation, in the organic light emitting display panel provided in the embodiment of the present invention, as shown in fig. 1, a pixel unit emitting light at a first preset angle θ 1 is a first-type pixel unit P1, a pixel unit emitting light at a second preset angle θ 2 is a second-type pixel unit P2, and a pixel unit without an optical path adjusting structure is a third-type pixel unit P3;
the first type pixel unit P1, the second type pixel unit P2 and the third type pixel unit P3 are arranged next to each other in the same direction to constitute a repeating unit of the organic light emitting display panel. Therefore, the original three groups of RGB are used as an integral pixel, three light emitting paths of the left side, the middle side and the right side can be realized through the design of the light path adjusting structure, the display in the left side, the middle side and the right side is realized, and the large-angle display is realized.
It should be noted that fig. 1 only illustrates one repeating unit formed by the first type pixel unit P1, the second type pixel unit P2, and the third type pixel unit P3, and it is understood that, in practical implementation, the organic display panel provided in this embodiment of the present invention includes a plurality of repeating units formed by the first type pixel unit P1, the second type pixel unit P2, and the third type pixel unit P3.
Further, in order to realize a large-angle display with uniform light emission, in the organic light emitting display panel provided in the embodiment of the present invention, as shown in fig. 1, the third type of pixel unit P3 is located between the first type of pixel unit P1 and the second type of pixel unit P2.
Further, in order to ensure that the reflective layer can emit the received light at a predetermined angle and does not affect the transmittance of the display panel, in the organic light emitting display panel provided in the embodiment of the present invention, as shown in fig. 1, the reflective layer 2 is located on one side of the color filter (e.g., R) close to the third type pixel unit P3, and an orthographic projection area of the reflective layer 1 on the substrate (not shown in fig. 1) of the organic light emitting display panel accounts for 30% to 35% of an orthographic projection area of the color filter (e.g., R) on the substrate of the organic light emitting display panel.
Further, in the organic light emitting display panel provided by the embodiment of the invention, as shown in fig. 1, the thickness of the reflective layer 2 gradually increases from the first type pixel unit P1 to the third type pixel unit P3, and from the second type pixel unit P2 to the third type pixel unit P3. Therefore, the surface of the reflecting layer 2 facing the white light emitting device W is an inclined surface, and the inclined surface can reflect the light emitted by the white light emitting device W, so that the emergent light passing through the reflecting layer 1 is emitted at a large angle, and large-angle display is realized.
Further, in a specific implementation, in order to make the light emitted from the white light emitting device in the pixel unit having the light path adjusting structure enter the reflective layer as much as possible, an included angle between the inclined plane in the reflective layer and the substrate and an included angle between the inclined plane in the white light emitting device and the substrate need to be set reasonably, so that in order to increase the quantity of light emitted at a large angle, in the organic light emitting display panel provided in the embodiment of the present invention, as shown in fig. 1, an included angle θ 3 between a surface of the reflective layer 2 in contact with the color filter (e.g., R) and the inclined plane of the reflective layer 2 may be 57 ° to 63 °.
Preferably, in the implementation, as shown in fig. 1, an included angle θ 3 between a surface of the reflective layer 2 contacting the color filter (e.g., R) and the inclined surface of the reflective layer 2 is 60 °.
In specific implementation, the reflective layer and the auxiliary layer can be right-angled triangular prisms, and the included angle between the inclined surface and the right-angled surface in each right-angled triangular prism is selected according to the angle provided in the embodiment of the invention.
In one embodiment, the reflective layer and the auxiliary layer can be formed by a half-tone mask process (halftone photo mask).
Further, in practical implementation, in the above organic light emitting display panel provided by the embodiment of the invention, as shown in fig. 1, the thickness of the auxiliary layer 1 is gradually reduced in a direction from the first type pixel unit P1 to the third type pixel unit P3, and in a direction from the second type pixel unit P2 to the third type pixel unit P3. Thus, the white light emitting device W can be obliquely arranged toward the reflective layer 2, and the light emitted from the white light emitting device W is incident on the reflective layer.
In a specific implementation, the white light emitting device includes an anode, an organic light emitting layer and a cathode, which are stacked on a substrate, and an auxiliary layer is located between the anode and the substrate.
Further, in order to cooperate with the reflective layer to make the emitted light emit at a large angle as much as possible in practical implementation, in the organic light emitting display panel provided in the embodiment of the present invention, as shown in fig. 1, an included angle θ 4 between a surface of the auxiliary layer 1 in contact with the white light emitting device W and a surface of the auxiliary layer 1 in contact with the substrate (not shown) is 42 ° to 48 °.
Preferably, in implementation, as shown in fig. 1, an included angle θ 4 between a surface of the auxiliary layer 1 contacting the white light emitting device W and a surface of the auxiliary layer 1 contacting the substrate base (not shown) is 45 °.
In a specific implementation, the color filter is disposed on the cover plate, and the white light emitting device is disposed on the array substrate.
Further, in a specific implementation, in the organic light emitting display panel provided in the embodiment of the present invention, the organic light emitting display panel further includes: the first data driving circuit is electrically connected with the first type of pixel units, the second data driving circuit is electrically connected with the second type of pixel units, and the third data driving circuit is electrically connected with the third type of pixel units; each data driving circuit is used for independently controlling the pixel units which are respectively and correspondingly electrically connected to emit light. In this way, the first type pixel unit, the second type pixel unit and the third type pixel unit can be independently driven to emit light, the same image or different images can be displayed in three directions (left side, middle and right side in fig. 1) according to design, and the anti-peeping display is realized, for example, when the same image is displayed, only the first type pixel unit and the third type pixel unit can be driven to emit light, the second type pixel unit does not emit light, or only the third type pixel unit and the second type pixel unit are driven to emit light, and the first type pixel unit does not emit light, so that the single-side anti-peeping display can be realized; and only the third type of pixel units can be driven to emit light, and the first type of pixel units and the second type of pixel units do not emit light, so that the left and right peep-proof display can be realized. For example, when different images are displayed, the first type of pixel unit and the second type of pixel unit can be driven to display a darker image, and the second type of pixel unit can be driven to display a normal image, so that peep-proof display is realized.
In practical implementation, the organic light emitting display panel provided in the embodiments of the present invention further includes other functional film layers known to those skilled in the art, and details thereof are not described herein.
Based on the same inventive concept, embodiments of the present invention further provide a display device, including any one of the organic light emitting display panels provided by embodiments of the present 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 implementation of the display device can be referred to the above embodiments of the organic light emitting display panel, and repeated descriptions are omitted.
According to the organic light-emitting display panel and the display device provided by the embodiment of the invention, the light path adjusting structure is arranged in the sub-pixels of the partial pixel units of the organic light-emitting display panel, the auxiliary layer of the light path adjusting structure deflects light emitted by the white light-emitting device to the reflecting layer, and the reflecting layer of the light path adjusting structure emits received light at a preset angle, so that the emitted light can be emitted at a large angle through the light path adjusting structure, the emergent light angle of the white light-emitting device is increased, and the large-angle display of the organic light-emitting display panel is realized.
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 (10)
1. An organic light-emitting display panel is characterized by comprising a plurality of pixel units, wherein each pixel unit comprises a plurality of sub-pixels, each sub-pixel comprises a white light-emitting device and a color filter positioned on the light-emitting side of the white light-emitting device; wherein, some sub-pixels of the pixel unit also comprise an optical path adjusting structure;
the optical path adjusting structure includes: the auxiliary layer is positioned on one side, back to the color filter, of the white light emitting device, and the reflecting layer is positioned on one side, facing the white light emitting device, of the color filter;
the auxiliary layer is used for deflecting light emitted by the white light emitting device to the reflecting layer, part of the reflecting layer is used for emitting received light at a first preset angle, part of the reflecting layer is used for emitting the received light at a second preset angle, and the first preset angle is complementary to the second preset angle.
2. The organic light emitting display panel of claim 1, wherein the pixel unit emitting light at the first predetermined angle is a first type pixel unit, the pixel unit emitting light at the second predetermined angle is a second type pixel unit, and the pixel unit without the light path adjusting structure is a third type pixel unit;
the first type of pixel unit, the second type of pixel unit and the third type of pixel unit are arranged next to each other along the same direction to form a repeating unit of the organic light-emitting display panel.
3. The organic light emitting display panel of claim 2, wherein the third type of pixel cell is located between the first type of pixel cell and the second type of pixel cell.
4. The organic light emitting display panel according to claim 3, wherein a surface of the color filter facing the white light emitting device is a first surface, the reflective layer is located on a side of the first surface close to the third type pixel unit, and an orthographic projection area of the reflective layer on the substrate of the organic light emitting display panel is 30% to 35% of an orthographic projection area of the color filter on the substrate of the organic light emitting display panel.
5. The organic light emitting display panel according to claim 4, wherein the thickness of the reflective layer gradually increases in a direction from the first type of pixel unit to the third type of pixel unit and in a direction from the second type of pixel unit to the third type of pixel unit.
6. The organic light emitting display panel according to claim 5, wherein an angle between a surface of the reflective layer in contact with the color filter and an inclined surface of the reflective layer is 57 ° to 63 °.
7. The organic light emitting display panel according to claim 5, wherein the auxiliary layer has a thickness that gradually decreases in a direction from the first-type pixel unit toward the third-type pixel unit and in a direction from the second-type pixel unit toward the third-type pixel unit.
8. The organic light emitting display panel according to claim 7, wherein an angle between a surface of the auxiliary layer contacting the white light emitting device and a surface of the auxiliary layer contacting the base substrate is 42 ° to 48 °.
9. The organic light emitting display panel according to any one of claims 2 to 8, further comprising: the first data driving circuit is electrically connected with the first type of pixel units, the second data driving circuit is electrically connected with the second type of pixel units, and the third data driving circuit is electrically connected with the third type of pixel units; each data driving circuit is used for individually controlling the pixel units which are respectively and correspondingly electrically connected to emit light.
10. A display device comprising the organic light-emitting display panel according to any one of claims 1 to 9.
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| CN201911205205.2A CN110729340B (en) | 2019-11-29 | 2019-11-29 | Organic light-emitting display panel and display device |
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| CN201911205205.2A CN110729340B (en) | 2019-11-29 | 2019-11-29 | Organic light-emitting display panel and display device |
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| CN112038493B (en) * | 2020-08-17 | 2022-05-31 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| CN115376400B (en) * | 2021-05-19 | 2024-05-14 | 瀚宇彩晶股份有限公司 | Display device and method of operating the same |
| CN115172430B (en) * | 2022-07-26 | 2024-09-10 | 厦门天马微电子有限公司 | Display panel, driving method thereof and display device |
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| CN104157669A (en) * | 2014-04-16 | 2014-11-19 | 上海天马有机发光显示技术有限公司 | Organic light emitting display panel and manufacturing method and display device thereof |
| CN105652511A (en) * | 2016-04-11 | 2016-06-08 | 京东方科技集团股份有限公司 | Display device |
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