CN115020615B - Display device and display terminal - Google Patents
Display device and display terminal Download PDFInfo
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- CN115020615B CN115020615B CN202210682728.1A CN202210682728A CN115020615B CN 115020615 B CN115020615 B CN 115020615B CN 202210682728 A CN202210682728 A CN 202210682728A CN 115020615 B CN115020615 B CN 115020615B
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- 239000010410 layer Substances 0.000 claims abstract description 186
- 239000002346 layers by function Substances 0.000 claims abstract description 27
- 230000005525 hole transport Effects 0.000 claims abstract description 17
- 239000000758 substrate Substances 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000000969 carrier Substances 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 208000008918 voyeurism Diseases 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
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/82—Cathodes
- H10K50/824—Cathodes combined with auxiliary electrodes
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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
-
- 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
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The application provides a display device and a display terminal, the display device includes: a substrate; an anode layer formed on the substrate; the anode layer includes a plurality of anodes; a light emitting functional layer formed on the anode layer; the light-emitting functional layer comprises a hole transmission layer, a light-emitting layer and an electron transmission layer which are sequentially stacked, wherein the light-emitting layer comprises a plurality of light-emitting units, and one light-emitting unit corresponds to one anode; adjacent two light emitting units overlap to form an overlapping portion; an auxiliary cathode layer formed between the hole transport layer and the electron transport layer; part of the auxiliary cathode layer is contacted with the lap joint part; and a cathode formed on the electron transport layer and electrically connected to the auxiliary cathode layer. The display device and the display terminal provided by the application can eliminate the transverse current between the adjacent pixels, so that the adjacent pixels can be prevented from being stolen and bright, and the color shift caused by the stolen and bright pixel can be further eliminated.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a display device and a display terminal.
Background
When the organic light-emitting diode device is manufactured, the light-emitting layer of the organic light-emitting diode device is usually formed in an evaporation mode, adjacent light-emitting units are easy to overlap in the evaporation process, parallel branches can be formed by overlapping the light-emitting units, electric leakage can be caused by the parallel branches, the adjacent pixels are stolen to be bright due to electric leakage, and color cast can be caused by the stealing of the adjacent pixels.
Disclosure of Invention
In view of the above, the present application provides a display device capable of eliminating a lateral current between adjacent pixels, thereby being capable of avoiding the adjacent pixels from being peeped to further eliminate color shift caused by the peeping.
In order to solve the problems, the technical scheme provided by the application is as follows:
in one aspect, the present application provides a display device including:
a substrate;
an anode layer formed on the substrate; the anode layer includes a plurality of anodes;
a light-emitting functional layer formed on the anode layer; the light-emitting functional layer comprises a hole transmission layer, a light-emitting layer and an electron transmission layer which are sequentially stacked, wherein the light-emitting layer comprises a plurality of light-emitting units, and one light-emitting unit corresponds to one anode; two adjacent light emitting units are overlapped to form an overlapping part;
an auxiliary cathode layer formed between the hole transport layer and the electron transport layer; a portion of the auxiliary cathode layer is in contact with the overlap;
and a cathode formed on the electron transport layer and electrically connected to the auxiliary cathode layer.
In an alternative embodiment of the present application, the auxiliary cathode layer includes a plurality of first auxiliary cathode portions and a plurality of second auxiliary cathode portions, the first auxiliary cathode portions are connected to the second auxiliary cathode portions, and the first auxiliary cathode portions and the second auxiliary cathode portions are respectively in contact with the corresponding overlapping portions.
In an alternative embodiment of the present application, the first auxiliary cathode portion and the second auxiliary cathode portion are formed on the hole transport layer, and the overlap portions are formed on the first auxiliary cathode portion and the second auxiliary cathode portion, respectively.
In an alternative embodiment of the present application, the light emitting functional layer further includes a cavity length adjusting layer formed on the hole transporting layer, and the light emitting layer is formed on the cavity length adjusting layer; the cavity length adjusting layer comprises a plurality of cavity length adjusting parts, one light emitting unit is formed on one cavity length adjusting part, and the first auxiliary cathode part and the second auxiliary cathode part are respectively positioned between two adjacent cavity length adjusting parts corresponding to the first auxiliary cathode part and the second auxiliary cathode part.
In an alternative embodiment of the present application, the overlap portion is formed on the hole transport layer, and the first auxiliary cathode portion and the second auxiliary cathode portion are formed on the overlap portions respectively corresponding thereto.
In an alternative embodiment of the present application, the light emitting functional layer further includes a hole blocking layer formed on the light emitting layer and covering the first auxiliary cathode portion and the second auxiliary cathode portion, and the electron transport layer is formed on the hole blocking layer.
In an alternative embodiment of the present application, the light emitting functional layer further includes an electron blocking layer formed on the hole transport layer, the light emitting layer is formed on the electron blocking layer, and the first auxiliary cathode portion and the second auxiliary cathode portion are formed between the electron blocking layer and the overlap portion.
In an optional embodiment of the present application, the display device includes a display area and a frame area, the light emitting unit and the anode are located in the display area, and a part of the cathode and a part of the pixel defining layer are located in the frame area;
the auxiliary cathode layer further comprises a third auxiliary cathode part connected with the first auxiliary cathode part, part of the third auxiliary cathode part is formed on the light-emitting layer adjacent to the frame area or the hole transport layer adjacent to the frame area, and the third auxiliary cathode part is electrically connected with the cathode;
the display device further includes a pixel defining layer formed on the substrate and covering the anode layer; the pixel defining layer includes a plurality of pixel openings, the hole transporting layer is formed on the pixel defining layer and in the pixel openings, and one of the light emitting units is formed in one of the pixel openings;
a portion of the third auxiliary cathode portion is further formed on the pixel defining layer within the frame region and electrically connected to the cathode.
In an alternative embodiment of the present application, the first auxiliary cathode portion, the second auxiliary cathode portion and the third auxiliary cathode portion are disposed in the same layer and made of the same material.
In a second aspect, the present application also provides a display terminal comprising a body portion and a display device as described above, the display device being fixed to the body portion.
According to the display device and the display terminal provided by the application, the auxiliary cathode layer electrically connected with the cathode is formed between the hole transmission layer and the electron transmission layer, and part of the auxiliary cathode layer is contacted with the lap joint part between the adjacent light-emitting units of the light-emitting layer. Because the auxiliary cathode layer is electrically connected with the cathode, surplus electrons are arranged in the auxiliary cathode layer, when carriers in one light-emitting unit migrate to an adjacent light-emitting unit, holes in the carriers passing through the auxiliary cathode layer can be neutralized by the electrons in the auxiliary cathode layer, so that the electrons migrating to the adjacent light-emitting unit cannot collide with the holes to emit light, and transverse current between adjacent pixels can be eliminated, so that the adjacent pixels can be prevented from being stolen and lightened, and color cast caused by the stealing and the lightening is further eliminated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a cross-sectional view of a display device according to a first embodiment of the present application.
Fig. 2 is a cross-sectional view of a display device according to a second embodiment of the present application.
Fig. 3 is a simplified schematic diagram of a light emitting functional layer and an auxiliary cathode layer of a display device according to a third embodiment of the present application.
Fig. 4 is a simplified schematic diagram of a light emitting functional layer and an auxiliary cathode layer of a display device according to a fourth embodiment of the present application.
Fig. 5 is a simplified schematic diagram of a light emitting functional layer and an auxiliary cathode layer of a display device according to a fifth embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless specifically defined otherwise.
The present application may repeat reference numerals and/or letters in the various examples, and is for the purpose of simplicity and clarity, and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
The display device and the display terminal provided by the application are described in detail below with reference to specific embodiments and drawings.
Referring to fig. 1, a first embodiment of the present application provides a display device 100, wherein the display device 100 includes a substrate 10, an anode layer 20, a light emitting functional layer 40, an auxiliary cathode layer 50, a cathode layer 60 and a flat layer 70, the anode layer 20 is formed on the substrate 10, the light emitting functional layer 40 is formed on the anode layer 20, the cathode 60 is formed on the light emitting functional layer 40, the auxiliary cathode layer 50 is formed in the light emitting functional layer 40, and the flat layer 70 is formed on the cathode 60.
Wherein, the substrate 10 has a driving circuit therein, and the driving circuit is electrically connected to the anode layer 20 to provide an anode voltage to the anode layer 20. In other embodiments, the driving circuit may further provide a cathode voltage to the cathode 60, so that a voltage difference exists between the anode layer and the cathode to drive the light emitting functional layer 40 to emit light. Of course, in other embodiments, the cathode voltage may also be provided to the cathode 60 by connecting other external circuits.
The anode layer 20 includes a plurality of anodes, such as a first anode 21, a second anode 22, and a third anode 23.
In an alternative embodiment of the present application, the display device 100 further includes a pixel defining layer 30, and the pixel defining layer 30 is formed on the substrate 10 and covers the anode layer 20. The pixel defining layer 30 includes a plurality of pixel openings, such as a first pixel opening 31, a second pixel opening 32, and a third pixel opening 33, a portion of the first anode 21 is exposed from the first pixel opening 31, a portion of the second anode 22 is exposed from the second pixel opening 32, and a portion of the third anode 23 is exposed from the third pixel opening 33.
Wherein the light emitting function layer 40 is formed on the pixel defining layer 30 and in the plurality of pixel openings. The light-emitting functional layer 40 includes a hole-transporting layer 41, a light-emitting layer 42 and an electron-transporting layer 43, which are sequentially stacked, and the hole-transporting layer 41 is formed on the pixel defining layer 30 and in the plurality of pixel openings. Wherein the auxiliary cathode layer 50 is formed between the hole transport layer 41 and the electron transport layer 43 and in contact with the light emitting layer 42.
In other embodiments, the light emitting functional layer 40 further includes a hole injection layer (not shown) and an electron injection layer (not shown). The hole injection layer is formed over the pixel defining layer 30 and within the plurality of pixel openings, and the hole transport layer 41 is formed within the hole injection layer. The electron injection layer is formed on the electron transport layer 43 and is located between the electron transport layer 43 and the cathode 60.
The light emitting layer 42 includes a plurality of light emitting units, such as a first light emitting unit 421, a second light emitting unit 422, and a third light emitting unit 423. One of the light emitting units corresponds to one of the anodes, specifically, the first light emitting unit 421 corresponds to the first anode 21, the second light emitting unit 422 corresponds to the second anode 22, and the third light emitting unit 423 corresponds to the third anode 23; adjacent two of the light emitting units overlap to form an overlap portion, and in this embodiment, a portion of the auxiliary cathode layer 50 contacts the overlap portion.
Specifically, the first light emitting unit 421 overlaps the second light emitting unit 422 to form a first overlap 424, and the second light emitting unit 422 overlaps the third light emitting unit 423 to form a second overlap 425.
The auxiliary cathode layer 50 includes a plurality of first auxiliary cathode portions 52 and a plurality of second auxiliary cathode portions 53, the first auxiliary cathode portions 52 are connected to the second auxiliary cathode portions 53, and the first auxiliary cathode portions 52 and the second auxiliary cathode portions 53 are respectively in contact with the corresponding overlapping portions. Specifically, the first auxiliary cathode part 52 is in contact with the first overlap 424, and the second auxiliary cathode part 53 is in contact with the second overlap 425.
In this embodiment, the first overlap 424 and the second overlap 425 are formed on the hole transport layer 41 (i.e., the light emitting unit is formed on the hole transport layer 41), the first auxiliary cathode 52 and the second auxiliary cathode 53 are formed on the first overlap 424 and the second overlap 425, respectively, and the electron transport layer 43 encapsulates the first auxiliary cathode 52 and the second auxiliary cathode 53.
The display device 100 further includes a display area 101 and a frame area 102, the light emitting unit and the anode are located in the display area 101, a part of the cathode 60 and a part of the pixel defining layer 30 are located in the frame area 102, and another part of the cathode 60 and another part of the pixel defining layer 30 are located in the display area 101.
Wherein the auxiliary cathode layer 50 further includes a third auxiliary cathode portion 51 connected to the first auxiliary cathode portion 52, a portion of the third auxiliary cathode portion 51 is formed on the light emitting layer 42 adjacent to the frame region 102, and another portion of the third auxiliary cathode portion 51 is further formed on the pixel defining layer 30 located in the frame region 102 and electrically connected to the cathode 60.
Wherein the first auxiliary cathode 52, the second auxiliary cathode 53 and the third auxiliary cathode 51 are arranged in the same layer and made of the same material.
Referring to fig. 2, a second embodiment of the present application provides a display device 200, wherein the display device 200 has a similar structure to the display device 100, and the difference is that: the first auxiliary cathode portion 52 and the second auxiliary cathode portion 53 of the display device 200 are formed on the hole transport layer 41, the first overlap portion 424 and the second overlap portion 425 are formed on the first auxiliary cathode portion 52 and the second auxiliary cathode portion 53, respectively, and the third auxiliary cathode portion 51 is formed on the hole transport layer 41 adjacent to the frame region 102 and in contact with the first light emitting unit 421.
Referring to fig. 3, fig. 3 is a simplified schematic diagram of a light emitting functional layer and an auxiliary cathode layer of a display device 300 according to a third embodiment of the application. The display device 300 is similar to the display device 200 in structure, except that the light emitting functional layer 40 of the display device 300 further includes a cavity length adjusting layer 44, the cavity length adjusting layer 44 is formed on the hole transporting layer 41, and the light emitting layer 42 is formed on the cavity length adjusting layer 44; the cavity length adjusting layer 44 includes a plurality of cavity length adjusting portions (for example, a first cavity length adjusting portion 441, a second cavity length adjusting portion 442, and a third cavity length adjusting portion 443), one of the light emitting units is formed on one of the cavity length adjusting portions (for example, the first light emitting unit 421 is formed on the first cavity length adjusting portion 441, the second light emitting unit 422 is formed on the second cavity length adjusting portion 442, the third light emitting unit 423 is formed on the third cavity length adjusting portion 443), the first auxiliary cathode portion 52 and the second auxiliary cathode portion 53 are respectively located between two adjacent cavity length adjusting portions corresponding thereto (for example, the first auxiliary cathode portion 52 is located in a gap between the first cavity length adjusting portion 441 and the second cavity length adjusting portion 442, and the second auxiliary cathode portion 53 is located in a gap between the second cavity length adjusting portion 442 and the third cavity length adjusting portion 443).
Referring to fig. 4, fig. 4 is a simplified schematic diagram of a light emitting functional layer and an auxiliary cathode layer of a display device 400 according to a fourth embodiment of the application. The display device 400 is similar to the display device 100 in structure, except that the light emitting functional layer 40 of the display device 400 further includes a hole blocking layer 45, the hole blocking layer 45 is formed on the light emitting layer 42 and covers the first auxiliary cathode portion 52 and the second auxiliary cathode portion 53, and the electron transporting layer 43 is formed on the hole blocking layer 45.
Referring to fig. 5, fig. 5 is a simplified schematic diagram of a light emitting functional layer and an auxiliary cathode layer of a display device 500 according to a fifth embodiment of the application. The display device 500 is similar to the display device 100 in structure, except that the light emitting functional layer 40 of the display device 500 further includes an electron blocking layer 46, the electron blocking layer 46 is formed on the hole transporting layer 41, the light emitting layer 42 is formed on the electron blocking layer 46, the first auxiliary cathode portion 52 and the second auxiliary cathode portion 53 are formed between the electron blocking layer 46 and the overlap portion, specifically, the first auxiliary cathode portion 52 is formed between the electron blocking layer 46 and the first overlap portion 424, and the second auxiliary cathode portion 53 is formed between the electron blocking layer 46 and the second overlap portion 425.
The present application also provides a display terminal (not shown) comprising a body portion (not shown) and a display device 100/200/300/400/500 as described above, the display device 100/200/300/400/500 being fixed to the body portion. The display terminal can be a mobile phone, a computer, a display screen and the like.
According to the display device and the display terminal provided by the application, the auxiliary cathode layer electrically connected with the cathode is formed between the hole transmission layer and the electron transmission layer, and part of the auxiliary cathode layer is contacted with the lap joint part between the adjacent light-emitting units of the light-emitting layer. Because the auxiliary cathode layer is electrically connected with the cathode, surplus electrons are arranged in the auxiliary cathode layer, when carriers in one light-emitting unit migrate to an adjacent light-emitting unit, holes in the carriers passing through the auxiliary cathode layer can be neutralized by the electrons in the auxiliary cathode layer, so that the electrons migrating to the adjacent light-emitting unit cannot collide with the holes to emit light, and transverse current between adjacent pixels can be eliminated, so that the adjacent pixels can be prevented from being stolen and lightened, and color cast caused by the stealing and the lightening is further eliminated.
In summary, although the present application has been described in terms of the preferred embodiments, the preferred embodiments are not limited to the above embodiments, and various modifications and changes can be made by one skilled in the art without departing from the spirit and scope of the application, and the scope of the application is defined by the appended claims.
Claims (7)
1. A display device, characterized in that,
a substrate;
an anode layer formed on the substrate; the anode layer includes a plurality of anodes;
a light-emitting functional layer formed on the anode layer; the light-emitting functional layer comprises a hole transmission layer, a light-emitting layer and an electron transmission layer which are sequentially stacked, wherein the light-emitting layer comprises a plurality of light-emitting units, and one light-emitting unit corresponds to one anode; two adjacent light emitting units are overlapped to form an overlapping part;
an auxiliary cathode layer formed between the hole transport layer and the electron transport layer; a portion of the auxiliary cathode layer is in contact with the overlap;
a cathode formed on the electron transport layer and electrically connected to the auxiliary cathode layer;
the light-emitting functional layer further comprises a cavity length adjusting layer, the cavity length adjusting layer is formed on the hole transport layer, and the light-emitting layer is formed on the cavity length adjusting layer; the cavity length adjusting layer comprises a plurality of cavity length adjusting parts, one light emitting unit is formed on one cavity length adjusting part, and part of the auxiliary cathode layer is positioned between two adjacent cavity length adjusting parts.
2. The display device according to claim 1, wherein the auxiliary cathode layer includes a plurality of first auxiliary cathode portions and a plurality of second auxiliary cathode portions, the first auxiliary cathode portions being connected to the second auxiliary cathode portions, the first auxiliary cathode portions and the second auxiliary cathode portions being in contact with the overlap portions, respectively.
3. The display device according to claim 2, wherein the first auxiliary cathode portion and the second auxiliary cathode portion are formed on the hole transport layer, and the overlap portion is formed on the first auxiliary cathode portion and the second auxiliary cathode portion, respectively.
4. The display device according to claim 3, wherein the light-emitting functional layer further comprises a cavity length adjustment layer formed on the hole transport layer, the light-emitting layer being formed on the cavity length adjustment layer; the cavity length adjusting layer comprises a plurality of cavity length adjusting parts, one light emitting unit is formed on one cavity length adjusting part, and the first auxiliary cathode part and the second auxiliary cathode part are respectively positioned between two adjacent cavity length adjusting parts corresponding to the first auxiliary cathode part and the second auxiliary cathode part.
5. The display device of any one of claims 2-4, wherein the display device comprises a display region and a border region, the light emitting unit and the anode are located in the display region, and a portion of the cathode and a portion of the pixel defining layer are located in the border region;
the auxiliary cathode layer further comprises a third auxiliary cathode part connected with the first auxiliary cathode part, and part of the third auxiliary cathode part is formed on the light-emitting layer adjacent to the frame area or the hole transport layer adjacent to the frame area;
the display device further includes a pixel defining layer formed on the substrate and covering the anode layer; the pixel defining layer includes a plurality of pixel openings, the hole transporting layer is formed on the pixel defining layer and in the pixel openings, and one of the light emitting units is formed in one of the pixel openings;
a portion of the third auxiliary cathode portion is further formed on the pixel defining layer within the frame region and electrically connected to the cathode.
6. The display device according to claim 5, wherein the first auxiliary cathode portion, the second auxiliary cathode portion and the third auxiliary cathode portion are arranged in the same layer and made of the same material.
7. A display terminal comprising a body portion and the display device according to claim 1, the display device being fixed to the body portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210682728.1A CN115020615B (en) | 2022-06-16 | 2022-06-16 | Display device and display terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210682728.1A CN115020615B (en) | 2022-06-16 | 2022-06-16 | Display device and display terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115020615A CN115020615A (en) | 2022-09-06 |
| CN115020615B true CN115020615B (en) | 2023-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210682728.1A Active CN115020615B (en) | 2022-06-16 | 2022-06-16 | Display device and display terminal |
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| CN107994059B (en) * | 2017-11-27 | 2020-05-26 | 京东方科技集团股份有限公司 | Array substrate and manufacturing method thereof |
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- 2022-06-16 CN CN202210682728.1A patent/CN115020615B/en active Active
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| CN109560117A (en) * | 2018-12-21 | 2019-04-02 | 合肥鑫晟光电科技有限公司 | A kind of array substrate and preparation method thereof, display device |
| CN113257854A (en) * | 2020-05-06 | 2021-08-13 | 广东聚华印刷显示技术有限公司 | Display panel, preparation method thereof and display device |
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| CN115020615A (en) | 2022-09-06 |
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