CN113471267A - Display panel - Google Patents
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- CN113471267A CN113471267A CN202110739035.7A CN202110739035A CN113471267A CN 113471267 A CN113471267 A CN 113471267A CN 202110739035 A CN202110739035 A CN 202110739035A CN 113471267 A CN113471267 A CN 113471267A
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- color filter
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- 239000000758 substrate Substances 0.000 claims abstract description 48
- 239000011159 matrix material Substances 0.000 claims abstract description 34
- 238000004806 packaging method and process Methods 0.000 claims abstract description 14
- 239000010410 layer Substances 0.000 claims description 139
- 239000012044 organic layer Substances 0.000 claims description 30
- 238000005538 encapsulation Methods 0.000 claims description 6
- 230000000007 visual effect Effects 0.000 abstract description 7
- 230000000903 blocking effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000002310 reflectometry Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229920001621 AMOLED Polymers 0.000 description 1
- 239000006173 Good's buffer Substances 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—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
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
Abstract
The embodiment of the invention relates to the technical field of display and discloses a display panel. In the present invention, a display panel includes: the base plate, superpose in proper order and locate organic luminescent layer, packaging structure and color filter on the base plate, color filter includes: the color filter comprises a plurality of color filters arranged at intervals and a black matrix with a plurality of openings for exposing the substrate, wherein one color filter covers the substrate exposed by one opening; the color filter comprises a light-emitting surface far away from one side of the substrate, a reflecting layer is arranged in the packaging structure, and the reflecting layer is used for reflecting light rays emitted by the organic light-emitting layer out of the light-emitting surface. The display panel provided by the invention can reflect the light rays originally emitted to the lower surface of the black matrix out of the light-emitting surface through the reflecting layer, thereby avoiding overlarge visual angle brightness attenuation and improving the readability of a display screen under a large visual angle.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel.
Background
Circular polarizers in display panels (e.g., AMOLED) are excellent in reducing reflection, but have increased display thickness by 50-100 um and reduced brightness, and in order to make screens thinner and improve flexibility, the light-emitting efficiency is improved on the premise of ensuring contrast, power consumption is reduced, and the service life is prolonged.
The inventor finds that at least the following problems exist in the prior art: since the BM (Black matrix) on the color filter has a blocking effect on light, the blocked area increases with the increase of the viewing angle, which results in too large brightness attenuation at the viewing angle and lower readability of the display screen at a large viewing angle.
Disclosure of Invention
An object of the present invention is to provide a display panel, which can reflect light rays originally emitted to a lower surface of a black matrix out of a light emitting surface through a reflective layer, so as to avoid excessive brightness attenuation at a viewing angle, and improve readability of a display screen at a large viewing angle.
To solve the above technical problem, an embodiment of the present invention provides a display panel including: the base plate, superpose in proper order and locate organic luminescent layer, packaging structure and color filter on the base plate, color filter includes: a plurality of color filters disposed at intervals, and a black matrix having a plurality of openings, one of the color filters being located in one of the openings; the color filter comprises a light-emitting surface far away from one side of the substrate, a reflecting layer is arranged in the packaging structure, and the reflecting layer is used for reflecting light rays emitted by the organic light-emitting layer out of the light-emitting surface.
Compared with the prior art, the organic light emitting layer, the packaging structure and the color filter are sequentially stacked on the substrate, the reflecting layer is arranged in the packaging structure and used for reflecting light emitted by the organic light emitting layer out of the light emitting surface, so that light originally emitted to the lower surface of the black matrix (the surface close to one side of the packaging structure is the lower surface) and shielded by the black matrix can be reflected out of the light emitting surface through the reflecting layer before being shielded, the phenomenon that the brightness of a visual angle is too large in attenuation is avoided, and the readability of the display screen under a large visual angle is improved.
In addition, the package structure includes: the organic light emitting diode comprises a first inorganic layer, an organic layer and a second inorganic layer which are sequentially stacked on an organic light emitting layer, wherein a reflecting layer is positioned in the organic layer. Because the reflecting layer is positioned in the organic layer, the organic layer has the function of planarization, and the problem that the surface of the packaging structure is not flat due to the arrangement of the reflecting layer can be avoided.
In addition, the thickness of the reflective layer is equal to the thickness of the organic layer in a direction perpendicular to the substrate. According to the arrangement, on the premise of ensuring the flatness of the packaging structure, the thickness of the reflecting layer is increased (the size in the stacking direction is the thickness), the range of light rays capable of being reflected by the reflecting layer is enlarged to the maximum extent, the brightness of the display screen is increased, and the readability of the display screen under a large visual angle is improved.
In addition, in the direction perpendicular to the substrate, the thickness of the reflective layer is smaller than that of the organic layer, and the organic layer covers the surface of the reflective layer on the side close to the second inorganic layer. The organic layer completely covers the reflecting layer, so that the effect of planarization is achieved, and the integral flatness of the packaging structure is guaranteed.
In addition, the organic layer includes: a first portion disposed opposite to the color filter in a direction perpendicular to the substrate, and a second portion disposed opposite to the black matrix in the direction perpendicular to the substrate, the reflective layer being interposed between the first portion and the second portion.
In addition, a width of a gap between the first portion and the second portion ranges from 8 micrometers to 14 micrometers. With the arrangement, even if the reflective layer has enough thickness to ensure higher reflectivity, the problem of poor flexibility of the display panel caused by the arrangement of the excessively wide reflective layer can be avoided.
In addition, the orthographic projection of the reflecting layer on the substrate is positioned in the orthographic projection of the black matrix on the substrate. By such arrangement, the light rays originally emitted to the color filter can be prevented from being blocked by the reflecting layer.
In addition, the organic light emitting layer includes: a plurality of spaced apart pixels, the display panel further comprising: a pixel defining layer enclosing a plurality of pixel pits, one of said light emitting pixels being located within one of said pixel pits; in the direction perpendicular to the substrate, the light-emitting pixels are arranged opposite to the color filter, the pixel defining layer is arranged opposite to the black matrix, and the orthographic projection of the reflecting layer on the substrate is also positioned in the orthographic projection of the pixel defining layer on the substrate. By the arrangement, the light emitted by the light-emitting pixels can be prevented from being emitted by the reflecting layer.
In addition, the reflective layer includes: an upper surface close to one side of the black matrix, a lower surface far away from one side of the black matrix, and an inner side surface which connects the upper surface and the lower surface and is close to one side of the organic light-emitting layer; the inner side surface is used for reflecting light rays emitted by the organic light emitting layer to the color filter, and the inner side surface is parallel to the direction of the lower surface pointing to the upper surface. The preparation is simple and the cost is low.
In addition, the reflective layer includes: the organic light emitting diode comprises an upper surface close to one side of the black matrix, a lower surface far away from one side of the black matrix, an inner side surface which connects the upper surface and the lower surface and is close to one side of the organic light emitting layer, and an outer side surface which is arranged opposite to the inner side surface; the inner side surface is used for reflecting light rays emitted by the organic light emitting layer to the color filter, and the inner side surface extends towards one side close to the outer side surface along the direction of the lower surface towards the upper surface. By the arrangement, light rays under a larger viewing angle can be reflected out of the light-emitting surface through the reflecting layer, and the brightness of the display screen under the large viewing angle is further improved.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
FIG. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another display panel according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of another display panel in an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
A first embodiment of the present invention relates to a display panel, as shown in fig. 1, 2, and 3, including: the organic light emitting diode package structure comprises a substrate 11, an organic light emitting layer 12, a package structure 13 and a color filter 14, wherein the organic light emitting layer 12, the package structure 13 and the color filter 14 are sequentially stacked on the substrate 11, and the color filter 14 comprises: a plurality of color filters disposed at intervals, and a black matrix having a plurality of openings, one of the color filters being located in one of the openings; the color filter 141 includes a light emitting surface 141a on a side away from the substrate 11, and the package structure 13 is disposed with a reflective layer 15, wherein the reflective layer 15 is used for reflecting the light emitted from the organic light emitting layer 12 out of the light emitting surface 141 a.
Because the organic light emitting layer 12, the encapsulation structure 13 and the color filter 14 are sequentially stacked on the substrate 11, and the reflective layer 15 is disposed in the encapsulation structure 13, an optical rotation cavity is formed, and light rays which originally irradiate the lower surface of the black matrix 142 (the surface close to one side of the encapsulation structure 13 is the lower surface) and are blocked by the black matrix 142 can be reflected out of the light emitting surface 141a through the reflective layer 15 before being blocked by the reflective layer 15, so that the phenomenon that the brightness of a viewing angle is too large in attenuation is avoided, and the readability of a display screen under a large viewing angle is improved.
Specifically, the package structure 13 includes: the first inorganic layer 131, the organic layer 132, and the second inorganic layer 133 are sequentially stacked on the organic light emitting layer 12, and the reflective layer 15 is located in the organic layer 132, that is, the thickness of the reflective layer 15 (the dimension in the stacking direction (the direction perpendicular to the substrate 11), that is, the thickness) does not exceed the thickness of the organic layer 132, and the organic layer 132 has a planarization function, so that the problem of uneven surface of the package structure 13 due to the provision of the reflective layer 15 can be avoided.
The material of the reflective layer 15 may be a high-reflectivity material such as aluminum, molybdenum, etc. so that light incident on the reflective layer 15 can be reflected as much as possible; the first inorganic layer 131 and the second inorganic layer 133 may be made of inorganic materials such as silicon oxide and silicon nitride, the inorganic materials have good water and oxygen blocking properties, and the first inorganic layer 131 and the second inorganic layer 133 are used for blocking water and oxygen; the organic layer 132 may be made of an organic material such as epoxy resin or polycarbonate, the organic material has a good buffer effect, and the organic layer 132 is used for buffering stress between the first inorganic layer 131 and the second inorganic layer 133, so as to avoid stress concentration caused by bending and achieve planarization. By arranging the package structure 13 to include the first inorganic layer 131, the organic layer 132 and the second inorganic layer 133, the reflective layer 15 is located in the organic layer 132, so that the package structure 13 has good water and oxygen blocking characteristics, good bending resistance and good flatness.
The specific preparation process of the encapsulation layer and the reflection layer 15 is as follows: first, a first inorganic layer is deposited over the organic light emitting layer 12, then a high-reflectivity reflective material layer is sputtered on the first inorganic layer, the reflective material layer is etched to form a patterned reflective layer 15 (specifically, a through hole is etched in a position of the reflective material layer corresponding to the light emitting pixel, a plurality of barrier structures are formed at the non-etched position to surround the edge of each light emitting pixel), an organic layer 132 is formed on the patterned reflective layer 15 to fill the through hole of the reflective layer 15, and finally, a second inorganic layer is deposited.
Regarding the thickness setting of the reflective layer 15, the following two setting modes are taken as examples:
as shown in fig. 1, in the first arrangement, in the direction X perpendicular to the substrate 11, the thickness of the reflective layer 15 may be equal to the thickness of the organic layer 132, so that the thickness of the reflective layer 15 is increased on the premise of ensuring the flatness of the encapsulation structure 13, the range of light rays that can be reflected by the reflective layer 15 is maximally expanded, the brightness of the display screen is increased, and the readability of the display screen under a large viewing angle is improved.
As shown in fig. 2, in the second arrangement, in the direction X perpendicular to the substrate 11, the thickness of the reflective layer 15 is smaller than that of the organic layer 132, and further, the organic layer 132 covers the surface (i.e., the upper surface 151) of the reflective layer 15 on the side close to the second inorganic layer 133, and since the organic layer 132 completely covers the reflective layer 15, the planarization effect is achieved, so that the flatness of the whole package structure 13 is ensured.
Specifically, the organic layer 132 includes: a first portion 132a disposed facing the color filter 141 in a direction X perpendicular to the substrate 11, and a second portion 132b disposed facing the black matrix 142 in the direction X perpendicular to the substrate 11, the reflective layer 15 being interposed between the first portion 132a and the second portion 132b, and further, an orthogonal projection of the reflective layer 15 on the substrate 11 is annular and disposed around the first portion 132 a.
The width of the gap between the first portion 132a and the second portion 132b may range from 8 micrometers to 14 micrometers, preferably 12 micrometers, that is, the width of the reflective layer 15 (the wall thickness of the reflective layer 15 in the direction parallel to the substrate 11) ranges from 8 micrometers to 12 micrometers, preferably 12 micrometers, so that even if the reflective layer 15 has a sufficient thickness to ensure a high reflectivity, the problem of poor flexibility of the display panel due to the provision of the excessively wide reflective layer 15 can be avoided.
In order to avoid that light rays which are originally directed to the color filter 141 are blocked by the reflective layer 15, in the present embodiment, an orthogonal projection of the reflective layer 15 on the substrate 11 may be located within an orthogonal projection of the black matrix 142 on the substrate 11. Of course, the orthographic projection of the reflective layer 15 on the substrate 11 may partially overlap the orthographic projection of the color filter 141 on the substrate 11, or the orthographic projection of the reflective layer 15 on the substrate 11 may be within the orthographic projection of the color filter 141 on the substrate 11, which is not limited herein.
Further, the organic light emitting layer 12 may include: a plurality of spaced apart pixels, the display panel further comprising: a pixel defining layer 16 enclosing a plurality of pixel pits, one light emitting pixel being located in each pixel pit; in the direction X perpendicular to the substrate 11, the light-emitting pixels are disposed opposite to the color filter 141, the pixel defining layer 16 is disposed opposite to the black matrix 142, and the orthographic projection of the reflective layer 15 on the substrate 11 can also be located in the orthographic projection of the pixel defining layer 16 on the substrate 11, so that the reflective layer 15 can be prevented from blocking the light emitted by the light-emitting pixels.
In the present embodiment, the reflective layer 15 includes: an upper surface 151 close to the black matrix 142, a lower surface 152 far from the black matrix 142, and an inner side 153 connecting the upper surface 151 and the lower surface 152 and close to the organic light emitting layer 12, wherein the inner side 153 is used for reflecting light emitted from the organic light emitting layer 12 to the color filter 141, and the inner side 153 is parallel to the direction of the lower surface 152 to the upper surface 151, wherein the direction of the lower surface 152 to the upper surface 151 is the direction X perpendicular to the substrate 11, in other words, the included angle between the inner side 153 and the lower surface 152 is a right angle.
Optionally, in a direction parallel to the substrate 11, the edge of the color filter 141 is flush with the inner side 153 of any adjacent reflective layer 15, and/or, in a direction parallel to the substrate 11, the edge of the light-emitting pixel is flush with the inner side 153 of any adjacent reflective layer 15, at this time, light rays which originally irradiate the lower surface 152 of the black matrix 142 (the surface close to the side of the package structure 13 is the lower surface 152) and are blocked by the black matrix 142 at a large viewing angle can be better reflected out of the light emitting surface 141a through the reflective layer 15 before being blocked.
Certainly, as shown in fig. 3, the inner side surface 153 may also extend toward a side close to the outer side surface along a direction in which the lower surface 152 points to the upper surface 151, in other words, an included angle between the inner side surface 153 and the lower surface 152 is an acute angle, that is, the inner side surface 153 of the reflective layer 15 is obliquely arranged in an open shape, so that light can be reflected out of the light emitting surface 141a through the reflective layer 15 at a larger viewing angle, and the brightness of the display screen at a larger viewing angle is further improved.
It should be noted that, when the thickness of the reflective layer 15 in the direction X perpendicular to the substrate 11 is smaller than the thickness of the organic layer 132, the inner side surface 153 may also extend toward the side close to the outer side surface along the direction from the lower surface 152 to the upper surface 151, and details thereof are not repeated here.
Compared with the prior art, the embodiment of the invention has the advantages that the reflecting layer 15 is arranged in the packaging structure 13 to form the optical rotary cavity, and the light rays which are originally emitted to the lower surface 152 of the black matrix 142 (the surface close to one side of the packaging structure 13 is the lower surface 152) and are shielded by the black matrix 142 can be reflected out of the light-emitting surface 141a through the reflecting layer 15 before being shielded by the reflecting layer 15, so that the phenomenon that the brightness of the visual angle is greatly attenuated is avoided, and the readability of the display screen under the large visual angle is improved.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (10)
1. A display panel, comprising: the base plate, superpose in proper order and locate organic luminescent layer, packaging structure and color filter on the base plate, color filter includes: a plurality of color filters disposed at intervals, and a black matrix having a plurality of openings, one of the color filters being located in one of the openings;
the color filter comprises a light-emitting surface far away from one side of the substrate, a reflecting layer is arranged in the packaging structure, and the reflecting layer is used for reflecting light rays emitted by the organic light-emitting layer out of the light-emitting surface.
2. The display panel of claim 1, wherein the encapsulation structure comprises: the organic light emitting diode comprises a first inorganic layer, an organic layer and a second inorganic layer which are sequentially stacked on an organic light emitting layer, wherein a reflecting layer is positioned in the organic layer.
3. The display panel according to claim 2, wherein a thickness of the reflective layer is equal to a thickness of the organic layer in a direction perpendicular to the substrate.
4. The display panel according to claim 2, wherein a thickness of the reflective layer is smaller than a thickness of the organic layer in a direction perpendicular to the substrate, and the organic layer covers a surface of the reflective layer on a side close to the second inorganic layer.
5. The display panel according to claim 2, wherein the organic layer comprises: a first portion disposed opposite to the color filter in a direction perpendicular to the substrate, and a second portion disposed opposite to the black matrix in the direction perpendicular to the substrate, the reflective layer being interposed between the first portion and the second portion.
6. The display panel according to claim 5, wherein a width of a gap between the first portion and the second portion is in a range of 8 to 14 micrometers.
7. The display panel of claim 1, wherein an orthographic projection of the reflective layer on the substrate is within an orthographic projection of the black matrix on the substrate.
8. The display panel according to claim 7, wherein the organic light emitting layer comprises: a plurality of spaced apart pixels, the display panel further comprising: a pixel defining layer enclosing a plurality of pixel pits, one of said light emitting pixels being located within one of said pixel pits;
in the direction perpendicular to the substrate, the light-emitting pixels are arranged opposite to the color filter, the pixel defining layer is arranged opposite to the black matrix, and the orthographic projection of the reflecting layer on the substrate is also positioned in the orthographic projection of the pixel defining layer on the substrate.
9. The display panel according to claim 8, wherein the reflective layer comprises: an upper surface close to one side of the black matrix, a lower surface far away from one side of the black matrix, and an inner side surface which connects the upper surface and the lower surface and is close to one side of the organic light-emitting layer;
the inner side surface is used for reflecting light rays emitted by the organic light emitting layer to the color filter, and the inner side surface is parallel to the direction of the lower surface pointing to the upper surface.
10. The display panel according to claim 7, wherein the reflective layer comprises: the organic light emitting diode comprises an upper surface close to one side of the black matrix, a lower surface far away from one side of the black matrix, an inner side surface which connects the upper surface and the lower surface and is close to one side of the organic light emitting layer, and an outer side surface which is arranged opposite to the inner side surface;
the inner side surface is used for reflecting light rays emitted by the organic light emitting layer to the color filter, and the inner side surface extends towards one side close to the outer side surface along the direction of the lower surface towards the upper surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110739035.7A CN113471267B (en) | 2021-06-30 | 2021-06-30 | Display panel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110739035.7A CN113471267B (en) | 2021-06-30 | 2021-06-30 | Display panel |
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| CN113471267A true CN113471267A (en) | 2021-10-01 |
| CN113471267B CN113471267B (en) | 2024-02-09 |
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Cited By (1)
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| CN113809142A (en) * | 2021-11-04 | 2021-12-17 | 合肥维信诺科技有限公司 | Display panel and display device |
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| CN113471267B (en) | 2024-02-09 |
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