CN115346437A - Display module and display device - Google Patents
Display module and display device Download PDFInfo
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- CN115346437A CN115346437A CN202210927767.3A CN202210927767A CN115346437A CN 115346437 A CN115346437 A CN 115346437A CN 202210927767 A CN202210927767 A CN 202210927767A CN 115346437 A CN115346437 A CN 115346437A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
Abstract
The embodiment of the invention discloses a display module and a display device; the display module comprises a display panel and a protective layer, wherein the protective layer is positioned on the light emergent side of the display panel and comprises a first layer, a second layer and a thermal decomposition layer positioned between the first layer and the second layer; according to the invention, the protective layer is arranged to comprise two layers and the thermal decomposition layer positioned between the two layers, when the outer surface of the protective layer needs to be replaced, the thermal decomposition layer is decomposed by using laser, so that the outer protective film layer can be conveniently stripped and removed, the maintenance and replacement process is simple and convenient, and the maintenance and replacement cost of the display module is reduced.
Description
Technical Field
The invention relates to the field of display, in particular to a display module and a display device.
Background
In recent years, display module assembly's life and maintenance cost, more and more receive the consumer and regard, display module assembly surface generally has the apron layer at present, in order to adapt to collapsible application scene, generally do not contain the optical cement in the apron layer, need coating technology in order to form the protective layer, when the protective layer fish tail appears and damages even, it is great to change the maintenance degree of difficulty, can only change whole display module assembly even, display module assembly's maintenance replacement cost is high, it is complicated to change technology.
Therefore, a display module and a display device are needed to solve the above technical problems.
Disclosure of Invention
The invention provides a display module and a display device, which can solve the technical problems of high maintenance and replacement cost and complex replacement process of the conventional protective layer.
The invention provides a display module, comprising:
a display panel;
the protective layer is positioned on the light emergent side of the display panel;
wherein the protective layer comprises a first layer, a second layer, and a thermal decomposition layer between the first layer and the second layer.
Further preferably, the material of the thermal decomposition layer is the same as the material of the first layer, or the material of the thermal decomposition layer is the same as the material of the second layer.
Further preferably, the material of the thermal decomposition layer is the same as the material of the first layer, the first layer being located between the display panel and the second layer; the first layer has an absorptivity of greater than or equal to 30% with respect to light in a first wavelength range, and the second layer has an absorptivity of greater than 30% with respect to light in a second wavelength range; wherein the first wavelength range includes a third wavelength range that is outside the second wavelength range.
Further preferably, the third wavelength range is greater than or equal to 20nm.
Further preferably, the first layer has an absorptivity of light in a third wavelength range of 90% or more, and the second layer has an absorptivity of light in the third wavelength range of less than 10%.
Further preferably, the material of the thermal decomposition layer is the same as the material of the first layer, the first layer is located between the display panel and the second layer, the first layer includes polyimide, and the second layer includes polyimide; wherein the polyimide in the second layer comprises an ester group or/and a silicon group.
Further preferably, the material of the thermal decomposition layer is the same as the material of the first layer, the first layer is located between the display panel and the second layer, the first layer includes polyimide, and the second layer includes siloxane or/and epoxy resin.
Further preferably, the thickness of the thermal decomposition layer is smaller than the thickness of the first layer, and the thickness of the thermal decomposition layer is smaller than the thickness of the second layer.
Further preferably, the display module comprises a central area and an edge area surrounding the central area, and the thermal decomposition layer is located in the edge area.
The invention also provides a display device, which comprises the display module and the device main body, wherein the display module and the device main body are combined into a whole.
The invention has the beneficial effects that: according to the invention, the protective layer is arranged to comprise two layers and the thermal decomposition layer positioned between the two layers, when the outer surface of the protective layer needs to be replaced, the thermal decomposition layer is decomposed by laser, so that the outer protective film layer is conveniently stripped and removed, the maintenance and replacement process is simple and convenient, and the maintenance and replacement cost of the display module is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view of a first structure of a display module according to an embodiment of the present invention;
fig. 2 is a schematic view of a second structure of a display module according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a third structure of a display module according to an embodiment of the invention;
fig. 4 is a schematic diagram illustrating a fourth structure of a display module according to an embodiment of the disclosure;
FIG. 5 is a flowchart illustrating a method for fabricating a display module according to an embodiment of the present invention;
fig. 6A to 6B are schematic flow charts illustrating a method for manufacturing a display module according to an embodiment of the invention;
fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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. Furthermore, it should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, and are not intended to limit the present invention. In the present invention, unless otherwise specified, the use of directional terms such as "upper" and "lower" generally means upper and lower in the actual use or operation of the device, particularly in the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.
In recent years, display module's life and maintenance cost, more and more receive the consumer and attach attention to, display module surface generally has the apron layer at present, in order to adapt to collapsible application scene, generally do not contain the optical cement in the apron layer, need coating technology in order to form the protective layer, when the protective layer fish tail appears and even damages, it is great to change the maintenance degree of difficulty, can only change whole display module even, display module's maintenance replacement cost is high, it is complicated to change technology.
Referring to fig. 1 to 4, an embodiment of the invention provides a display module 100, including:
a display panel 200;
a protective layer 300 located on the light emitting side of the display panel 200;
the protection layer 300 includes a first layer 310, a second layer 320, and a thermal decomposition layer 330 between the first layer 310 and the second layer 320.
According to the invention, the protective layer is arranged to comprise two layers and the thermal decomposition layer positioned between the two layers, when the outer surface of the protective layer needs to be replaced, the thermal decomposition layer is decomposed by laser, so that the outer protective film layer is conveniently stripped and removed, the maintenance and replacement process is simple and convenient, and the maintenance and replacement cost of the display module is reduced.
The technical solution of the present invention will now be described with reference to specific embodiments.
In some embodiments, referring to fig. 1, the first layer 310 is disposed between the second layer 320 and the display panel 200 for illustration, the hardness of the second layer 320 is greater than that of the first layer 310, the second layer 320 is used as a scratch-resistant film layer, the higher hardness is required to improve scratch resistance, and the lower hardness of the first layer 310 can balance the flexibility of the protective layer 300 and assist in repairing and replacing the protective layer 300.
In some embodiments, referring to fig. 3, the material of the thermal decomposition layer 330 is the same as the material of the first layer 310, or the material of the thermal decomposition layer 330 is the same as the material of the second layer 320.
The thermal decomposition layer 330 may be provided integrally with the first layer 310, or the thermal decomposition layer 330 may be provided integrally with the second layer 320, and the first layer 310 is decomposed by laser heating to peel off the second layer 320; or the second layer 320 is decomposed by laser heating; the second layer 320 is then reformed to replace the passivation layer 300.
In some embodiments, the first layer 310 is positioned between the display panel 200 and the second layer 320, the first layer 310 has an absorptivity of greater than or equal to 30% for light in a first wavelength range, the second layer 320 has an absorptivity of greater than 30% for light in a second wavelength range, and the pyrolytic layer 330 has an absorptivity of greater than or equal to 30% for light in a third wavelength range; wherein the third wavelength range is outside the first wavelength range and the third wavelength range is outside the second wavelength range.
Different materials have different light absorption rates in different wavelength ranges, and the thermal decomposition layer 330 can be independently irradiated with laser in a special waveband to accelerate the decomposition of the thermal decomposition layer 330, so that the outer protective film layer is stripped and removed, the maintenance and replacement process is simple and convenient, and the maintenance and replacement cost of the display module 100 is reduced.
In some embodiments, the first layer 310 is positioned between the display panel 200 and the second layer 320, the first layer 310 has an absorptivity of greater than or equal to 30% for light in a first wavelength range, the second layer 320 has an absorptivity of greater than 30% for light in a second wavelength range, and the pyrolytic layer 330 has an absorptivity of greater than or equal to 30% for light in a third wavelength range; wherein the first wavelength range includes a third wavelength range that is outside the second wavelength range.
The light absorption rate of the side, close to the first layer 310, of the thermal decomposition layer 330 can be enhanced, so that the temperature of the first layer 310 is increased, the decomposition of the thermal decomposition layer 330 is facilitated, the peeling and removal of the second layer 320 are facilitated, the maintenance and replacement process is simple and convenient, and the maintenance and replacement cost of the display module 100 is reduced.
In some embodiments, the material of the thermal decomposition layer 330 is the same as the material of the first layer 310, the first layer 310 being located between the display panel 200 and the second layer 320; the first layer 310 has an absorptivity of greater than or equal to 30% with respect to light in a first wavelength range, and the second layer 320 has an absorptivity of greater than 30% with respect to light in a second wavelength range; wherein a third wavelength range is within the first wavelength range, and the third wavelength range is outside the second wavelength range.
When the first layer 310 is decomposed by laser irradiation, the light absorption rate of the first layer 310 in the first wavelength range needs to be greater than or equal to 30%, and laser irradiation in the third wavelength range can avoid absorption of laser by the second layer 320, so that laser energy is intensively absorbed by the first layer 310 to enhance decomposition of the first layer 310, thereby peeling off the second layer 320; or the second layer 320 is decomposed by laser heating; the second layer 320 is then reformed to replace the passivation layer 300.
In some embodiments, the third wavelength range is greater than or equal to 20nm.
For example, the second wavelength range is within the first wavelength range, the third wavelength range being a difference set of the first wavelength range and the second wavelength range; for another example, the first wavelength range and the second wavelength range do not overlap, and the third wavelength range is a wavelength interval between the first wavelength range and the second wavelength range. When the wavelength of the laser is within the third wavelength range, the third wavelength range is not too narrow so as to reduce the difficulty of wavelength concentration of the laser, the first layer 310 strongly absorbs the laser, and the second layer 320 weakly absorbs the laser, so that thermal decomposition is performed on the first layer 310, the second layer 320 far away from one side of the display panel 200 is stripped and removed, the maintenance and replacement process is simple and convenient, and the maintenance and replacement cost of the display module 100 is reduced.
In some embodiments, the first layer 310 has an absorptivity of greater than or equal to 90% with respect to light within the third wavelength range, and the second layer 320 has an absorptivity of less than 10% with respect to light within the third wavelength range.
Preferably, the protective layer 300 is irradiated by laser light in a third wavelength range, the light absorption rate of the first layer 310 in the third wavelength range is greater than or equal to 90%, the light absorption rate of the second layer 320 in the third wavelength range is less than 10%, and the absorption rate of the first layer 310 is far greater than that of the second layer 320, so that the thermal decomposition rate of the first layer 310 is increased, the second layer 320 far away from one side of the display panel 200 can be stripped and removed, the maintenance and replacement process is simple and convenient, and the maintenance and replacement cost of the display module 100 is reduced.
In some embodiments, referring to fig. 3, the material of the thermal decomposition layer 330 is the same as the material of the first layer 310, the first layer 310 is located between the display panel 200 and the second layer 320, the first layer 310 comprises polyimide, and the second layer 320 comprises polyimide; wherein the polyimide in the second layer 320 comprises an ester group or/and a silicon group.
The main materials of the first layer 310 and the second layer 320 may be polyimide, and the second layer 320 is used as the peripheral protective layer 300, and a film layer with higher hardness and good anti-friction performance is required, so that ester groups or/and silicon groups are grafted in the polyimide, and the hardness of the second layer 320 is improved, so as to provide a better protective effect; meanwhile, ester groups or/and silicon groups are grafted in the polyimide, so that the absorption rate of the polyimide to ultraviolet light can be reduced, the difference range between the second wavelength range and the first wavelength range is enlarged, or the wavelength interval between the first wavelength range and the second wavelength range is enlarged, the width of the third wavelength range is enlarged, the difficulty of laser wavelength concentration is reduced, the first layer 310 strongly absorbs the laser, and the second layer 320 weakly absorbs the laser, so that the first layer 310 is subjected to thermal decomposition, the peeling and removal of the second layer 320 far away from one side of the display panel 200 are facilitated, the maintenance and replacement process is simple and convenient, and the maintenance and replacement cost of the display module 100 is reduced.
In some embodiments, referring to fig. 3, the material of the thermal decomposition layer 330 is the same as the material of the first layer 310, the first layer 310 is located between the display panel 200 and the second layer 320, the first layer 310 includes polyimide, and the second layer 320 includes siloxane or/and epoxy.
The first layer 310 is made of polyimide, the second layer 320 is made of organic polymer with high hardness, the first wavelength range corresponds to less than or equal to 400nm, the second layer 320 is made of siloxane as an example, the second wavelength range corresponds to less than or equal to 300nm, the third wavelength range corresponds to 300nm to 400nm, preferably laser with the wavelength of about 350nm can be selected to irradiate the protective layer 300, the first layer 310 has strong absorptivity (greater than 90%) for the laser with the wavelength, the second layer 320 has weak absorptivity (less than 90%) for the laser with the wavelength, the first layer 310 is decomposed under the action of heat, typical decomposition products are carbon dioxide and water, and due to high laser heat, water can be directly changed into water vapor to be scattered, so that the second layer 320 far away from the side of the display panel 200 can be peeled and removed, the maintenance and replacement process is simple, and the maintenance and replacement cost of the display module 100 is reduced.
In some embodiments, the first layer 310 and the second layer 320 are both transparent film layers, e.g., the first layer 310 is a transparent polyimide.
In some embodiments, referring to fig. 1-4, the thickness of the thermal decomposition layer 330 is less than the thickness of the first layer 310, and the thickness of the thermal decomposition layer 330 is less than the thickness of the second layer 320.
When the thermal decomposition layer 330 is separately disposed, the smaller the thickness of the thermal decomposition layer 330 is, the smaller the influence on the thickness of the entire display module 100 is, and the smaller the heat transfer influence on the surrounding film layers is, preferably, the thickness of the first layer 310 is greater than 20 micrometers, and the thickness of the thermal decomposition layer 330 is less than 1 micrometer, so that after the peeling and removing of the second layer 320, the surface of the first layer 310 on the side away from the display panel 200 still has a higher flatness.
In some embodiments, referring to fig. 4, the display module 100 includes a central area a and an edge area B surrounding the central area a, and the pyrolytic layer 330 is located in the edge area B.
After the thermal decomposition layer 330 in the edge region B is decomposed, the second layer 320 can be easily peeled off, so as to achieve the effect of replacing the protection layer 300, and reduce the influence on the first layer 310 in the central region a, for example, the flatness of the first layer 310 in the central region a is not influenced, and the time and cost for repairing the first layer 310 are reduced.
In some embodiments, the thickness of the first layer 310 is less than or equal to 100 μm, and the thickness of the first layer 310 is too large, so that although the overall impact resistance of the module is improved, the transparent polyimide material coated on the display panel 200 in an excessively thick layer can have a serious influence on the neutral layer of the display panel 200, which affects the overall bending performance.
In some embodiments, a ratio of the absorptivity of light of the first layer 310 in the third wavelength range to the absorptivity of light of the second layer 320 in the third wavelength range is greater than or equal to 5.
The first layer 310 and the second layer 320 have a distinct difference in light absorption rate in the third wavelength range, which is beneficial to intensively decomposing the first layer 310, so that the heat utilization rate is concentrated, and the decomposition rate of the first layer 310 is accelerated.
Preferably, a ratio of the light absorption rate of the first layer 310 in the third wavelength range to the light absorption rate of the second layer 320 in the third wavelength range is greater than or equal to 10.
In some embodiments, controlling the thermal influence is maintaining an issue on the stripping processThe process requirements, including laser type, laser power, pulse spacing, etc., are adjusted in trial and error in concert with the material itself. For example, femtosecond or picosecond lasers can be used to perform the treatment with lower laser energy, e.g., 200mJ/cm or less 2 The laser of (1).
In some embodiments, the forming process of the first layer 310, the second layer 320, and the thermal decomposition layer 330 may be a coating process.
After the second layer 320 is peeled off, a second layer 320 is further manufactured through a coating process, so that replacement is realized. It should be noted that the surface of the first layer 310 after laser lift-off may require some processing, such as cleaning, flatness repair, etc.
In some embodiments, referring to fig. 1, the display module 100 further includes a supporting member 400 disposed on a side of the display panel 200 away from the protective layer 300.
In some embodiments, referring to fig. 2, the display panel 200 further includes a polarizing layer 500 between the panel body and the protection layer 300.
In some embodiments, the display panel 200 may be a display panel 200 of a depolarizing layer 500 type, see fig. 1, or a display panel 200 of a polarized layer 500 type, see fig. 2.
According to the invention, the protective layer is arranged to comprise two layers and the thermal decomposition layer positioned between the two layers, when the outer surface of the protective layer needs to be replaced, the thermal decomposition layer is decomposed by using laser, so that the outer protective film layer can be conveniently stripped and removed, the maintenance and replacement process is simple and convenient, and the maintenance and replacement cost of the display module is reduced.
Referring to fig. 5, an embodiment of the present invention further provides a manufacturing method of a display module 100, including:
s100, providing a display module 100 including a display panel 200 and a protection layer 300 disposed on a light emitting side of the display panel 200, wherein the protection layer 300 includes a first layer 310, a second layer 320, and a pyrolytic layer 330 disposed between the first layer 310 and the second layer 320, please refer to fig. 6A
S200, irradiating the protection layer 300 with laser to decompose the pyrolytic layer 330, please refer to fig. 6B.
S300, removing the second layer 320.
S400, forming a protective material layer on the light emitting side of the display panel 200.
According to the invention, the protective layer is arranged to comprise two layers and the thermal decomposition layer positioned between the two layers, when the outer surface of the protective layer needs to be replaced, the thermal decomposition layer is decomposed by laser, so that the outer protective film layer is conveniently stripped and removed, the maintenance and replacement process is simple and convenient, and the maintenance and replacement cost of the display module is reduced.
The technical solution of the present invention will now be described with reference to specific embodiments.
In some embodiments, the material of the protective material layer may be the same as the material of the second layer 320.
In some embodiments, controlling thermal effects is a matter of maintaining the lift-off process, including laser type, laser power, pulse spacing, etc., with the associated process needing to be tuned in trial and error with the material itself. For example, femtosecond or picosecond lasers can be used to perform the treatment with lower laser energy, e.g., 200mJ/cm or less 2 The laser of (1).
Referring to fig. 7, an embodiment of the present invention further provides a display device 10, including any one of the display modules 100 and the device main body 20, where the display module 100 and the device main body 20 are combined into a whole.
For a specific structure of the display module 100, please refer to any of the embodiments and drawings of the display module 100, which are not described herein again.
In this embodiment, the device main body 20 may include a middle frame, a sealant, an external driver, an external heat sink, and the like, and the display device 10 may be a display terminal such as a mobile phone, a flat panel, a television, and the like, which is not limited herein.
The embodiment of the invention discloses a display module and a display device; the display module comprises a display panel and a protective layer, wherein the protective layer is positioned on the light emergent side of the display panel and comprises a first layer, a second layer and a thermal decomposition layer positioned between the first layer and the second layer; according to the invention, the protective layer is arranged to comprise two layers and the thermal decomposition layer positioned between the two layers, when the outer surface of the protective layer needs to be replaced, the thermal decomposition layer is decomposed by laser, so that the outer protective film layer is conveniently stripped and removed, the maintenance and replacement process is simple and convenient, and the maintenance and replacement cost of the display module is reduced.
The display module and the display device provided by the embodiment of the invention are described in detail, and the principle and the embodiment of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for those skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed, and in summary, the content of the present specification should not be construed as limiting the present invention.
Claims (10)
1. A display module, comprising:
a display panel;
the protective layer is positioned on the light emergent side of the display panel;
wherein the protective layer comprises a first layer, a second layer, and a thermal decomposition layer between the first layer and the second layer.
2. The display module of claim 1, wherein the material of the thermal decomposition layer is the same as the material of the first layer, or the material of the thermal decomposition layer is the same as the material of the second layer.
3. The display module of claim 2, wherein the material of the thermal decomposition layer is the same as the material of the first layer, the first layer being between the display panel and the second layer;
the first layer has an absorptivity of greater than or equal to 30% with respect to light in a first wavelength range, and the second layer has an absorptivity of greater than 30% with respect to light in a second wavelength range;
wherein the first wavelength range includes a third wavelength range that is outside the second wavelength range.
4. The display module of claim 3, wherein the third wavelength range is greater than or equal to 20nm.
5. The display module of claim 3, wherein the first layer has an absorptivity of greater than or equal to 90% with respect to light within the third wavelength range, and the second layer has absorptivity of less than 10% with respect to light within the third wavelength range.
6. The display module of claim 2, wherein the material of the thermal decomposition layer is the same as the material of the first layer, the first layer is between the display panel and the second layer, the first layer comprises polyimide, and the second layer comprises polyimide;
wherein the polyimide in the second layer comprises an ester group or/and a silicon group.
7. The display module according to claim 2, wherein the material of the thermal decomposition layer is the same as the material of the first layer, the first layer is located between the display panel and the second layer, the first layer comprises polyimide, and the second layer comprises siloxane or/and epoxy.
8. The display module of claim 1, wherein the thickness of the thermal decomposition layer is less than the thickness of the first layer and the thickness of the thermal decomposition layer is less than the thickness of the second layer.
9. The display module of claim 1, wherein the display module comprises a central region and an edge region surrounding the central region, and the thermal decomposition layer is located in the edge region.
10. A display device comprising the display module according to any one of claims 1 to 9 and a device main body, wherein the display module is integrated with the device main body.
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| CN111500209A (en) * | 2020-06-09 | 2020-08-07 | 京东方科技集团股份有限公司 | Separable protective film, stripping method thereof, display panel and electronic equipment |
| CN114067675A (en) * | 2020-08-07 | 2022-02-18 | 北京小米移动软件有限公司 | Folding screen, maintenance method thereof and electronic equipment |
| CN112820194A (en) * | 2021-01-05 | 2021-05-18 | 深圳市华星光电半导体显示技术有限公司 | Flexible display panel and preparation method thereof |
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