CN110323354B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN110323354B CN110323354B CN201910338909.0A CN201910338909A CN110323354B CN 110323354 B CN110323354 B CN 110323354B CN 201910338909 A CN201910338909 A CN 201910338909A CN 110323354 B CN110323354 B CN 110323354B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/844—Encapsulations
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
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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
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
Abstract
The invention provides a display panel and a display device, the display panel includes: the array substrate, the light-emitting layer, the packaging layer and the filter layer are arranged in a stacked mode; the packaging layer and the light-emitting layer are positioned between the filter layer and the array substrate, and the light-emitting layer is arranged close to the array substrate; the packaging layer comprises a plurality of intermediate film layers which are arranged in a stacked mode; in two adjacent middle film layers, the refractive index of the middle film layer close to the array substrate is larger than that of the middle film layer far away from the array substrate. After the external light enters the display panel, the external light is reflected on the metal layer of the display panel, and the reflected light can be totally reflected at the interface between two adjacent middle film layers in the process of passing through the packaging layer, so that the reflected light emitted by the display panel is reduced, and the contrast of the display panel is improved.
Description
Technical Field
The invention relates to the technical field of display equipment, in particular to a display panel and a display device.
Background
With the development of display device technology, an Organic Light-Emitting Diode (OLED) display panel is often used as a display device in an electronic device.
In the prior art, a display panel usually includes a light emitting layer and a filter layer, which are stacked, wherein the filter layer is provided with a filter opening, and a filter is arranged in the filter opening; the light emitted by the light emitting layer can be emitted through the optical filter in the optical filter to realize the display of the display panel.
However, the display panel has a metal layer therein, and external light rays can form reflected light rays on the metal layer after being incident on the display panel, and the reflected light rays can be emitted through the optical filter, thereby resulting in a low contrast ratio of the display panel.
Disclosure of Invention
Embodiments of the present invention provide a display panel and a display device to solve the technical problem that the contrast of the display panel is low due to the fact that reflected light is formed on a metal layer after ambient light enters the display panel and the reflected light is emitted through a filter.
An embodiment of the present invention provides a display panel, including: the array substrate, the light-emitting layer, the packaging layer and the filter layer are arranged in a stacked mode;
the packaging layer and the light-emitting layer are positioned between the filter layer and the array substrate, and the light-emitting layer is arranged close to the array substrate;
the packaging layer comprises a plurality of intermediate film layers which are arranged in a stacked mode; in two adjacent intermediate film layers, the refractive index of the intermediate film layer close to the array substrate is larger than that of the intermediate film layer far away from the array substrate.
In the display panel, preferably, one of the two adjacent intermediate film layers is an organic layer, and the other is an inorganic layer.
The display panel as described above, preferably, the middle film layer facing the array substrate has a protrusion thereon; the thickness of the convex part is gradually reduced from the middle to the edge along the direction vertical to the array substrate.
As described above, in the display panel, preferably, the surface of the protruding portion is a curved surface.
In the display panel, the light-emitting layer preferably has a pixel opening, and a projection of the pixel opening on the array substrate is located within a projection of the projection on the array substrate.
In the display panel as described above, preferably, three adjacent pixel openings constitute a pixel unit, and a projection of the pixel unit on the array substrate is located within a projection of the projection on the array substrate.
As above, preferably, the filter layer includes a light-shielding layer and an optical filter, the light-shielding layer is provided with the optical filter opening facing the pixel opening, and the optical filter is disposed in the optical filter opening.
As described above, preferably, each of the intermediate film layers between the intermediate film layer facing the array substrate and the intermediate film layer facing the filter layer has a projection, and projections of the projections on the array substrate overlap.
As above, preferably, the display panel further includes a transparent layer disposed on a side of the filter layer facing away from the array substrate.
The embodiment of the invention also provides a display device, which comprises a shell and the display panel, wherein the display panel is arranged in the shell.
According to the display panel and the display device provided by the embodiment of the invention, the array substrate, the light-emitting layer, the packaging layer and the filter layer are arranged in a laminated manner, the packaging layer and the light-emitting layer are positioned between the array substrate and the filter layer, and the light-emitting layer is arranged close to the array substrate; the packaging layer comprises a plurality of laminated middle film layers, and in two adjacent middle film layers, the refractive index of the middle film layer close to the array substrate is larger than that of the middle film layer far away from the array substrate; after the external light enters the display panel, the external light is reflected on the metal layer of the display panel, and the reflected light can be totally reflected at the interface between two adjacent middle film layers in the process of passing through the packaging layer, so that the reflected light emitted by the display panel is reduced, and the contrast of the display panel is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a first schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 2 is a second schematic structural diagram of an encapsulation layer in a display panel according to an embodiment of the present invention;
fig. 3 is a third schematic structural diagram of an encapsulation layer in a display panel according to an embodiment of the present invention;
fig. 4 is a fourth schematic structural diagram of an encapsulation layer in a display panel according to an embodiment of the present invention;
fig. 5 is a fifth schematic structural diagram of an encapsulation layer in a display panel according to an embodiment of the present invention.
Description of reference numerals:
10: an array substrate;
20: a light emitting layer;
201: a pixel opening;
30: a filter layer;
301: a light filtering port;
40: a packaging layer;
401: an intermediate film layer;
402: a projection;
50: a transparent layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present invention, unless otherwise specifically stated, the terms "mounted," "connected," "fixed," and the like are to be understood broadly, and for example, may be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, or communicable with each other; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected internally or in any other manner known to those skilled in the art, unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example one
Referring to fig. 1, the present embodiment provides a display panel, including: an array substrate 10, a light-emitting layer 20, an encapsulation layer 40, and a filter layer 30, which are stacked; the packaging layer 40 and the light-emitting layer 20 are positioned between the filter layer 30 and the array substrate 10, and the light-emitting layer 20 is arranged close to the array substrate 10; the encapsulation layer 40 includes a plurality of intermediate film layers 401 arranged in a stack; of the two adjacent intermediate film layers 401, the refractive index of the intermediate film layer 401 close to the array substrate 10 is greater than that of the intermediate film layer 401 far from the array substrate 10.
In this embodiment, the light emitting layer 20 includes a pixel defining layer and a light emitting unit, the pixel defining layer is provided with a plurality of pixel openings 201, each pixel opening 201 is provided with a light emitting unit therein, and the light emitting unit may be an organic light emitting unit. Preferably, when the light emitting unit is an organic light emitting unit, the display panel may be a flexible display panel, that is, the display panel may be bent to adapt to different application environments, thereby improving user experience.
Specifically, a plurality of thin film transistors are disposed on the array substrate 10, a plurality of first electrodes are disposed between the array substrate 10 and the pixel defining layer, and accordingly, each first electrode is electrically connected to one thin film transistor, and corresponds to one light emitting unit; a second electrode is disposed on a side of the light emitting layer 20 away from the array substrate 10, so that when the tft controls the first electrode electrically connected thereto to be charged, the light emitting unit corresponding to the first electrode emits light. The first electrode may be a metal layer mainly made of a metal material such as silver and copper, and the second electrode may be a transparent conductive layer mainly made of indium tin oxide.
In the present embodiment, the light emitting layer 20 and the encapsulation layer 40 are disposed between the light shielding layer and the array substrate 10, and the light emitting layer 20 is disposed close to the array substrate 10; the second electrode may be arranged between the encapsulation layer 40 and the light emitting layer 20, but of course the second electrode may also be arranged at a side of the encapsulation layer 40 facing away from the light emitting layer 20.
With reference to fig. 1, in the present embodiment, the filter layer 30 is disposed on a side of the encapsulation layer 40 away from the light emitting layer 20, and the filter layer 30 may include a light shielding layer and a filter opening 301, the light shielding layer is provided with a filter opening 301 opposite to the pixel opening 201, and the filter opening 301 is disposed in the filter opening 301. The light shielding layer is made of opaque light shielding materials, so that external light can only enter the display panel through the light filtering port 301; the light incident into the display panel is reduced. In addition, when the light emitting unit in the pixel opening 201 emits light, the light emitted by the light emitting unit is emitted through the corresponding filter opening 301; at this time, the light shielding layer can prevent the light in the light filtering port 301 from propagating into the adjacent light filtering port 301, and the light crosstalk between the adjacent light filtering ports 301 is avoided.
With continued reference to fig. 1, in the present embodiment, the light emitting layer 20 and the encapsulation layer 40 are disposed between the light shielding layer and the array substrate 10, and the light emitting layer 20 is disposed adjacent to the array substrate 10; that is, the encapsulating layer 40 is located between the light-emitting layer 20 and the filter layer 30, and the encapsulating layer 40 is used for encapsulating the light-emitting layer 20 so as to prevent air from contacting the light-emitting unit and further affecting the operation of the light-emitting unit. The encapsulating layer 40 includes a plurality of intermediate film layers 401 stacked, and the plurality of intermediate film layers 401 can improve an encapsulating effect of the light emitting layer 20.
In this embodiment, in two adjacent middle film layers 401, the refractive index of the middle film layer 401 close to the array substrate 10 is greater than the refractive index of the middle film layer 401 far from the array substrate 10; such that the refractive index of the entire encapsulation layer 40 gradually increases in the direction from the filter layer 30 to the array substrate 10.
The external light is emitted into the display panel and is reflected on a metal layer in the display panel, wherein the metal layer can be a first electrode or other film layers made of metal; the reflected light rays propagate outwards of the display panel, and at least a part of the reflected light rays are totally reflected when passing through the two adjacent intermediate film layers 401, so that the reflected light rays emitted by the display panel can be reduced, and the contrast of the display panel is improved.
In the process of emitting external light into the display panel, when the light passes through the two adjacent middle film layers 401, a part of the light is reflected, and a part of the light is refracted and then emitted to the array substrate 10; because the refractive index of the middle film layer 401 close to the array substrate 10 in the two adjacent middle film layers 401 is greater than the refractive index of the middle film layer 401 far away from the array space, in the process that light rays are transmitted to the array substrate 10, included angles between the light rays and the array substrate 10 when the light rays reach the interface of any two adjacent middle film layers 401 are different, and the included angles between the reflected light rays formed at the interface of any two adjacent middle film layers 401 and the array substrate 10 are also different; thus, when the light passes through the packaging layer 40, a plurality of beams of reflected light are formed, and the included angle between each reflected light and the array substrate 10 is different, so that the light is scattered; and the position of the eyes of an external user is fixed, so that the reflected light received by the user can be reduced, and the contrast is improved. In addition, since the light is reflected when passing through two adjacent intermediate film layers 401, the light passing through the encapsulation layer 40 is reduced, and the reflected light formed on the metal layer is reduced.
In this embodiment, the material of each middle film layer 401 is not limited as long as the refractive index of the middle film layer 401 close to the array substrate 10 is larger than the refractive index of the middle film layer 401 far from the array substrate 10 in the two connected middle film layers 401.
In this embodiment, one of the two adjacent middle film layers 401 is preferably an organic layer, and the other middle film layer 401 is preferably an inorganic layer. The encapsulation layer 40 composed of the organic layer and the inorganic layer improves the flatness of the encapsulation layer 40 while ensuring high sealability. Further, the organic layer and the inorganic layer constituting the encapsulation layer 40 may be alternately disposed.
In the display panel provided by this embodiment, the array substrate 10, the light emitting layer 20, the encapsulation layer 40, and the filter layer 30 are stacked, the encapsulation layer 40 and the light emitting layer 20 are located between the array substrate 10 and the filter layer 30, and the light emitting layer 20 is located close to the array substrate 10; the encapsulation layer 40 includes a plurality of intermediate film layers 401 stacked, and of two adjacent intermediate film layers 401, the refractive index of the intermediate film layer 401 close to the array substrate 10 is greater than the refractive index of the intermediate film layer 401 far from the array substrate 10; after the external light enters the display panel, the external light is reflected on the metal layer of the display panel, and the reflected light is totally reflected at the interface between the two adjacent middle film layers 401 in the process of passing through the packaging layer 40, so that the reflected light emitted by the display panel is reduced, and the contrast of the display panel is improved.
Example two
With continued reference to fig. 2 and fig. 3, in the present embodiment based on the first embodiment, the middle film layer 401 facing the array substrate 10 has a protrusion 402; the thickness of the protrusion 402 is gradually reduced from the middle to the edge in a direction perpendicular to the array substrate 10. In the process that the external light enters the display panel, the light is reflected on the surface of the protruding portion 402, and the thickness of the protruding portion 402 is gradually reduced from the middle to the edge, so that the included angle between the emitted light formed on the surface of the protruding portion 402 and the array substrate 10 is unequal, the light can be scattered, and the reflected light received by a user is reduced. In addition, when the external light is perpendicular to the display panel, most of the light can form reflected light on the surface of the protrusion 402, compared with the case where the surface of the middle film layer 401 is a plane, thereby reducing the light transmitted to the metal layer of the display panel.
Specifically, in the present embodiment, the thickness of the protruding portion 402 gradually decreases from the edge to the middle, and the protruding portion 402 may have a regular shape such as a cone shape or a pyramid shape, or the protruding portion 402 may have another irregular shape.
In this embodiment, the protrusion 402 may be disposed on a side of the middle film layer 401 facing the array substrate 10, or the protrusion 402 may be disposed on a side of the middle film layer 401 facing away from the array substrate 10.
Preferably, in the present embodiment, the surface of the convex portion 402 is a curved surface.
With continued reference to fig. 2 and fig. 3, in the present embodiment, the light-emitting layer 20 has a pixel opening 201 thereon, and a projection of the pixel opening 201 on the array substrate 10 is located within a projection of the protrusion 402 on the array substrate 10. The light transmittance of the pixel defining layer is low, so that external light mainly irradiates to the metal layer of the display panel through the pixel opening 201, and the projection of the pixel opening 201 on the array substrate 10 is located in the projection of the protrusion 402 on the array substrate 10, so that the light irradiating to the metal layer can be reduced.
Specifically, one projection 402 corresponds to one pixel opening 201, and the projection area of the pixel opening 201 on the array substrate 10 may be equal to the projection area of the projection 402 on the array substrate 10, or the projection area of the pixel opening 201 on the array substrate 10 is smaller than the projection area of the projection 402 on the array substrate 10.
With continued reference to fig. 2, in one realizable approach, the intermediate film layer in which the projections 402 are located may be composed of the projections 402 and the connecting portion connecting two adjacent projections 402, and the intermediate film layer is a continuous film layer.
With continued reference to fig. 3, in other implementations, the intermediate film layer in which the protrusion 402 is located may also be formed by a plurality of protrusions 402, and the intermediate film layer is a non-continuous film layer.
In this embodiment, each of the intermediate film layers 401 between the intermediate film layer 401 facing the array substrate 10 and the intermediate film layer 401 facing the filter layer 30 has a protrusion 402, and projections of the protrusions 402 on the array substrate 10 are overlapped. The light emitted to the metal layer is reflected by each of the protrusions 402 when passing through the encapsulation layer 40, thereby further reducing the light emitted to the metal layer and further reducing the reflected light emitted from the display panel.
In this embodiment, the display panel further includes a transparent layer 50, and the transparent layer 50 is disposed on a side of the filter layer 30 facing away from the array substrate 10. The transparent layer 50 may reduce the reflection of the external light on the filter layer, so as to further reduce the reflection of the light emitted from the display panel. Specifically, the transparent layer 50 may be an anti-reflection layer or other film layer with high transparency.
EXAMPLE III
With continuing reference to fig. 4 and 5, the present embodiment differs from the second embodiment in that: the adjacent three pixel openings 201 constitute a pixel unit, and the projection of the pixel unit on the array substrate 10 is located within the projection of the convex portion 402 on the array substrate 10. One protrusion 402 corresponds to three pixel openings 201, and compared with the case where each pixel opening 201 corresponds to one protrusion 402, the number of protrusions 402 can be reduced, thereby reducing the difficulty in manufacturing the encapsulating layer 40.
Specifically, three adjacent pixel openings 201 and the projection of the pixel defining layer between the pixel openings 201 on the array substrate 10 are located within the projection of the projection 402 on the array substrate 10. Among them, the three pixels constituting the pixel unit may be red pixels emitting red light, filter pixels emitting green light, and blue pixels emitting blue light.
In this embodiment, each of the intermediate film layers 401 between the intermediate film layer 401 facing the array substrate 10 and the intermediate film layer 401 facing the filter layer 30 has a protrusion 402, and projections of the protrusions 402 on the array substrate 10 are overlapped. The light emitted to the metal layer is reflected by each of the protrusions 402 when passing through the encapsulation layer 40, thereby further reducing the light emitted to the metal layer and further reducing the reflected light emitted from the display panel.
For example, the protrusion 402 may be located on a side of the middle film layer 401 facing away from the array substrate 10, and of course, the protrusion 402 may also be located on a side of the middle film layer 401 facing the array substrate 10.
With continued reference to fig. 4, in one realizable approach, the intermediate film layer in which the projections 402 are located may be composed of the projections 402 and the connecting portion connecting two adjacent projections 402, and the intermediate film layer is a continuous film layer.
With continued reference to fig. 5, in other implementations, the intermediate film layer in which the protrusion 402 is located may also be formed by a plurality of protrusions 402, and the intermediate film layer is a non-continuous film layer.
In this embodiment, the display panel further includes a transparent layer 50, and the transparent layer 50 is disposed on a side of the filter layer 30 facing away from the array substrate 10. The transparent layer 50 may reduce the reflection of the external light on the filter layer, so as to further reduce the reflection of the light emitted from the display panel. Specifically, the transparent layer 50 may be an anti-reflection layer or other film layer with high transparency.
Example four
With continued reference to fig. 1 to 5, the present embodiment provides a display device, which includes a housing and the display panel as described above, the display panel being disposed in the housing.
The display device in this embodiment may be a product or a component having a display function, such as a mobile phone, a tablet computer, a television, a display, an electronic book, electronic paper, a smart watch, a notebook computer, a digital photo frame, or a navigator.
Preferably, the display device is a flexible display device, the corresponding display panel is a flexible display panel, and the flexible display panel is bent to adapt to different application environments and improve user experience.
In the display device provided by the embodiment, the array substrate 10, the light emitting layer 20, the encapsulation layer 40, and the filter layer 30 are stacked, the encapsulation layer 40 and the light emitting layer 20 are located between the array substrate 10 and the filter layer 30, and the light emitting layer 20 is located close to the array substrate 10; the encapsulation layer 40 includes a plurality of intermediate film layers 401 stacked, and of two adjacent intermediate film layers 401, the refractive index of the intermediate film layer 401 close to the array substrate 10 is greater than the refractive index of the intermediate film layer 401 far from the array substrate 10; after the external light enters the display panel, the external light is reflected on the metal layer of the display panel, and the reflected light is totally reflected at the interface between the two adjacent middle film layers 401 in the process of passing through the packaging layer 40, so that the reflected light emitted by the display panel is reduced, and the contrast of the display panel is improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A display panel, comprising: the array substrate, the light-emitting layer, the packaging layer and the filter layer are arranged in a stacked mode;
the packaging layer and the light-emitting layer are positioned between the filter layer and the array substrate, and the light-emitting layer is arranged close to the array substrate;
the packaging layer comprises a plurality of intermediate film layers which are arranged in a stacked mode; in two adjacent intermediate film layers, the refractive index of the intermediate film layer close to the array substrate is larger than that of the intermediate film layer far away from the array substrate;
the middle film layer is provided with a convex part; the thickness of the bulge part is gradually reduced from the middle to the edge along the direction vertical to the array substrate;
the surface of the convex part is a curved surface;
the light-emitting layer is provided with a pixel opening, and the projection of the pixel opening on the array substrate is positioned in the projection of the convex part on the array substrate;
and the adjacent three pixel openings form a pixel unit, and the projection of the pixel unit on the array substrate is positioned in the projection of the convex part on the array substrate.
2. The display panel according to claim 1, wherein one of the adjacent two intermediate film layers is an organic layer, and the other of the adjacent two intermediate film layers is an inorganic layer.
3. The display panel according to claim 1, wherein the filter layer comprises a light-shielding layer and an optical filter, the light-shielding layer is provided with an optical filter opening facing the pixel opening, and the optical filter is disposed in the optical filter opening.
4. The display panel according to claim 1, wherein each of the intermediate film layers between the intermediate film layer facing the array substrate and the intermediate film layer facing the filter layer has a projection, and projections of the projections on the array substrate coincide.
5. The display panel of claim 1, further comprising a transparent layer disposed on a side of the filter layer facing away from the array substrate.
6. A display device comprising a housing and the display panel of any one of claims 1 to 5, the display panel being disposed within the housing.
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| CN111108602B (en) * | 2019-12-17 | 2022-02-22 | 京东方科技集团股份有限公司 | Method of reducing color separation of reflection of ambient light in a display panel, display device and method of manufacturing a display panel |
| KR20210078802A (en) * | 2019-12-19 | 2021-06-29 | 엘지디스플레이 주식회사 | Dislay Device |
| CN111430444B (en) * | 2020-04-30 | 2023-06-02 | 武汉华星光电半导体显示技术有限公司 | Quantum dot display panel and preparation method thereof |
| CN111725418B (en) * | 2020-05-21 | 2022-08-30 | 合肥维信诺科技有限公司 | Display panel |
| CN111477673B (en) * | 2020-05-22 | 2022-08-30 | 昆山国显光电有限公司 | Array substrate, display panel and display device |
| CN111477674B (en) * | 2020-05-22 | 2022-08-30 | 昆山国显光电有限公司 | Array substrate, display panel and display device |
| CN113178532A (en) * | 2021-04-12 | 2021-07-27 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| CN113345949A (en) * | 2021-06-25 | 2021-09-03 | 昆山工研院新型平板显示技术中心有限公司 | Array substrate and display device |
| CN116210365B (en) * | 2021-09-29 | 2024-04-02 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN117643195A (en) * | 2022-06-30 | 2024-03-01 | 京东方科技集团股份有限公司 | Display panel and display device |
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