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CN114292603A - Camera hole protective film, display device and display device detection method - Google Patents

Camera hole protective film, display device and display device detection method Download PDF

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Publication number
CN114292603A
CN114292603A CN202111616559.3A CN202111616559A CN114292603A CN 114292603 A CN114292603 A CN 114292603A CN 202111616559 A CN202111616559 A CN 202111616559A CN 114292603 A CN114292603 A CN 114292603A
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CN
China
Prior art keywords
film
layer
viscosity
camera hole
hole
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Pending
Application number
CN202111616559.3A
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Chinese (zh)
Inventor
吴擎
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Bazhou Yungu Electronic Technology Co ltd
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Bazhou Yungu Electronic Technology Co ltd
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Priority to CN202111616559.3A priority Critical patent/CN114292603A/en
Publication of CN114292603A publication Critical patent/CN114292603A/en
Pending legal-status Critical Current

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Abstract

The invention provides a camera hole protective film, a display device and a display device detection method, and relates to the technical field of semiconductors, wherein the camera hole protective film comprises: the film comprises a first layer film and a second layer film, wherein the transmittance of the second layer film is greater than that of the first layer film; the first layer of film is attached to the first surface of the second layer of film, the second surface of the second layer of film is used for covering the camera hole of the display panel, and the first viscosity between the first layer of film and the first surface is smaller than the second viscosity between the second surface and the display panel; the function of protecting the camera hole is achieved by utilizing material properties and structural design. In addition, the invention designs a detection method of the display device, which utilizes the camera hole protective film to protect the camera hole in the detection process, and prevents other influences on the camera hole, such as scratches, dirt and the like, while not influencing the detection operation.

Description

Camera hole protective film, display device and display device detection method
Technical Field
The invention relates to the technical field of semiconductors, in particular to a camera hole protective film, a display device and a display device detection method.
Background
At present, at least one camera hole exists in the display panel to realize the shooting function, but the camera hole of the display panel in the prior art is easily damaged in the process of manufacturing.
Disclosure of Invention
The invention aims to provide a camera hole protective film, a display device and a display device detection method, which are used for protecting a camera hole of a display panel from being polluted by dust in the process of carrying and simultaneously do not influence optical detection.
In a first aspect, the present invention provides a protective film for a photographic aperture, comprising:
a first layer of film;
a second layer of film having a transmittance greater than the transmittance of the first layer of film;
the first layer of film is attached to the first surface of the second layer of film, the second surface of the second layer of film is used for covering the shooting hole of the display panel, and the first viscosity between the first layer of film and the first surface is smaller than the second viscosity between the second surface and the display panel.
In an alternative embodiment, the second layer has a transmittance of greater than or equal to 90%. The optical detection of the camera hole can not be influenced because the second layer film has higher transmittance.
In alternative embodiments, the first viscosity is 4 to 10 gf/inch; the second viscosity was 200-400 gf/inch. Practical specific ranges of the first viscosity and the second viscosity are provided.
In an alternative embodiment, the bondline of the first film can withstand a maximum temperature of 90 ℃; preferably, the orthographic projection of the first layer of film on the display panel covers the camera aperture. The highest temperature which can be borne by the glue layer of the first layer of film is very high, so that the phenomenon that the glue layer of the first layer of film falls off in the process is avoided.
In an alternative embodiment, the method further comprises: a third layer of film positioned on one side of the second layer of film far away from the first layer of film; a double-sided adhesive tape which is positioned between the second layer film and the third layer film, and the double-sided adhesive tape is not arranged in the area of the second layer film, which is opposite to the camera shooting hole; wherein the viscosity between the double-sided tape and the display panel is a second viscosity, the viscosity between the double-sided tape and the third layer film is a third viscosity, and the viscosity between the double-sided tape and the second layer film is a fourth viscosity; the fourth viscosity is greater than the third viscosity. The third film in this embodiment can protect the adhesiveness of the double-sided tape.
In an optional embodiment, the double-sided adhesive tape is made of a transparent and high-temperature-resistant material; preferably, the maximum temperature that the double-sided adhesive tape can withstand is 90 ℃.
In a second aspect, the present invention provides a display device comprising the protection film for camera hole and the display panel according to any one of the above embodiments.
In a third aspect, the present invention provides a display device detection method, including: attaching a camera hole protective film to a camera hole of a display panel, wherein the camera hole protective film comprises a first film and a second film, and the transmittance of the second film is greater than that of the first film; the first layer of film is attached to the first surface of the second layer of film, and the second surface of the second layer of film is attached to the camera hole of the display panel; and carrying out optical detection on the camera hole of the display device with the first layer of film removed.
In an optional embodiment, the protection film for a camera hole further includes a double-sided adhesive and a third film located on a side of the second film away from the first film; the double faced adhesive tape is positioned between the second layer film and the third layer film, and the area of the second layer film, which is opposite to the camera shooting hole, is free of the double faced adhesive tape; the viscosity of the double-sided tape and the third layer of film is a third viscosity, and the viscosity of the double-sided tape and the second layer of film is a fourth viscosity; the fourth viscosity is greater than the third viscosity.
In an alternative embodiment, before attaching the camera hole protective film to the camera hole of the display panel, the method further includes: and tearing off the third film of the camera hole protective film.
The invention provides a camera hole protective film, a display device and a display device detection method. Wherein, this hole protection film of making a video recording includes: the film comprises a first layer film and a second layer film, wherein the transmittance of the second layer film is greater than that of the first layer film; the first layer of film is attached to the first surface of the second layer of film, the second surface of the second layer of film is used for covering the camera hole of the display panel, and the first viscosity between the first layer of film and the first surface is smaller than the second viscosity between the second surface and the display panel; the function of protecting the camera hole is achieved by utilizing material properties and structural design. In addition, the invention designs a detection method of the display device, which utilizes the camera hole protective film to protect the camera hole in the detection process, and prevents other influences on the camera hole, such as scratches, dirt and the like, while not influencing the detection operation.
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 other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a protection film for a camera hole according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 3 is a schematic flow chart illustrating a method for detecting a display device according to an embodiment of the present invention;
fig. 4 is a schematic flow chart illustrating another display device detection method according to an embodiment of the present invention.
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. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The inventor finds that steps such as defoaming, testing and UV curing are needed after the display panel camera shooting hole main body is manufactured, a protective film needs to be arranged on the camera shooting hole in the process, the protective film can prevent damage to the camera shooting hole in the manufacturing process, and foreign matters in the camera shooting hole caused by environmental pollution in the logistics carrying process can be avoided. In the prior art, the optical test of the camera shooting hole usually needs to be carried out after the camera shooting hole main body is manufactured, a protective film is attached to the camera shooting hole main body and transferred to other workshops for detection, but the optical performance of the existing protective film is generally poor, so that the optical test of the camera shooting hole can be influenced, the protective film needs to be removed before the test, and the protective film is attached again after the test is completed so as to carry out subsequent transportation and installation. The existing protective film is provided with a handle for pulling the protective film at one side far away from the camera hole, but the structure has the defect that the protective film is broken in the process of pulling the protective film outwards, so that scraps can enter the inside of the camera hole to cause defects; in the process from the manufacture of the main body of the camera hole to the installation, the surface of the camera hole is necessarily provided with a protective film, and the protective film is finally necessarily removed before the installation of the camera hole.
Based on this, the application provides a camera hole protective film, a display device and a display device detection method, so as to solve the problems.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Fig. 1 is a schematic structural diagram of a protection film for a camera hole according to an embodiment of the present invention. As shown in fig. 1, the camera hole protective film may include: a first layer 101 and a second layer 102, the second layer 102 having a higher transmittance than the first layer 101.
The first film 101 is attached to a first surface of the second film 102, a second surface of the second film 102 is used for covering the image capturing hole 104 of the display panel 103, and a first viscosity between the first film 101 and the first surface is less than a second viscosity between the second surface and the display panel 103.
The utility model provides a hole protection film of making a video recording adopts bilayer membrane structure, protects the second rete with first rete to the in-process such as commodity circulation before the protection second rete is gone into the factory is not contaminated or the fish tail, reduces the influence to follow-up optical detection.
Before Crack automatic optical inspection (Crack AOI) is carried out on the camera shooting hole area of the display panel, the first layer of film is torn off, and only the second layer of film is covered on the camera shooting hole of the display panel. The second layer of film includes two surfaces, namely the first surface that attaches with the first layer of film and covers the second surface on display panel, covers the second surface on display panel's the hole of making a video recording during the use, guarantees that the hole of making a video recording is covered by the second layer of film totally to the hole of making a video recording is not polluted or the fish tail at the in-process such as assembly, inspection, commodity circulation of protection, reaches the purpose of protecting the hole of making a video recording when not influencing automatic optical inspection operation of crack.
In order to avoid the effect of subsequent Crack AOI on the imaging aperture region, the second film 102 generally has a transmittance of 90% or more, so that the second film 102 can function as a dust-proof film even when subjected to inspection, and its high transmittance does not affect the effect of Crack AOI on the inspection of the imaging aperture region.
The orthographic projection of the first layer 101 on the display panel 103 covers the camera hole 104. It is understood that in the present embodiment, the area of the first layer 101 is smaller than the area of the second layer 102, i.e. the first layer 101 does not completely cover the second layer 102, and in other embodiments, the area of the first layer 101 may be larger than or equal to the area of the second layer 102, and the first layer 101 completely covers the second layer 102. The specific setting can be set according to the actual situation, and is not limited herein.
Alternatively, the material of both the first layer of film 101 and the second layer of film 102 may comprise polyethylene terephthalate or the like.
Furthermore, there is a difference between the two viscosities on the two surfaces of the second film, and it is generally necessary that the first viscosity between the first film 101 and the first surface is less than the second viscosity between the second surface and the display panel 103. As a specific example, the first viscosity may be in the range of 4 to 10gf/inch, and the second viscosity may be in the range of 200 and 400 gf/inch. By setting the first viscosity and the second viscosity within this range, the purpose is to prevent the first layer film 101 from being peeled off reversely, failing to be completely peeled off, or the second layer film 102 and the first layer film 101 from being damaged by adhesion and failing to be completely separated; and simultaneously prevents the second film 102 from being too viscous when being torn off, so that the display panel 103 is prevented from being damaged.
Wherein, the first layer film 101 is attached to the first surface of the second layer film 102 through the adhesive layer thereof, and the highest temperature which can be borne by the adhesive layer of the first layer film 101 is 90 ℃; the second layer of film 102 covers the display panel 103 through its adhesive layer, and no adhesive layer is disposed at the position (i.e., via hole region) corresponding to the camera hole 104 on the second surface of the second layer of film 102, so as to ensure that the camera hole region has a micro ventilation function, thereby playing a role in balancing air pressure and preventing indentation of the hole region caused by the difference between the internal pressure and the external pressure during the pressurization and defoaming process.
It is understood that the highest temperature that can be tolerated in this embodiment is below or equal to this temperature, e.g., 80 c, 70 c, etc., and the properties of the bondline are normal and not altered or damaged.
In one embodiment, the adhesive layer of the first layer 101 and the adhesive layer of the second layer 102 are transparent and can endure a high temperature greater than or equal to 90 ℃ to ensure that the adhesive is not removed after the temperature is increased, and the process light is irradiated uniformly, so that Mura with uneven local brightness is not caused; meanwhile, the high temperature resistant design can also avoid the influence of temperature change in the processes of pressure deaeration and Ultraviolet (UV) curing on the first layer of film 101 and the second layer of film 102.
In some embodiments, the protection film for the image capture hole further includes a third film, the third film is located under the second film 102, i.e. on the side of the second film 102 away from the first film 101, and the third film is removed before covering the second surface of the second film 102 on the image capture hole 104 of the display panel 103.
In some embodiments, the camera hole protective film further comprises a double-sided adhesive tape, the double-sided adhesive tape being located between the second layer of film 102 and the third layer of film; the area of the second layer of film 102 facing the camera hole 104 is free of double-sided adhesive; wherein, the viscosity between the double-sided tape and the display panel 103 is a second viscosity, the viscosity between the double-sided tape and the third layer film is a third viscosity, and the viscosity between the double-sided tape and the second layer film 102 is a fourth viscosity; the fourth viscosity is greater than the third viscosity.
As a specific example, the double-sided adhesive tape is transparent and can withstand a maximum temperature of 90 ℃; the transparent and high-temperature resistant design can ensure that the glue can not fall off after the temperature rises, the light irradiation in the manufacturing process is relatively uniform, and the local Mura can not be caused; the high-temperature resistant design can ensure the stable state of the double faced adhesive tape in the processes of pressurization, defoaming and UV curing; the camera shooting hole area is designed without glue, so that the camera shooting hole area can be ensured to have a micro ventilation function, an air pressure balancing effect is achieved, and hole area indentation caused by internal and external pressure difference in the pressurizing and defoaming process is prevented.
The embodiment of the invention can solve the pollution problem in the transportation process, can carry out the Crack AOI operation with the camera hole protective film, has no bad addition caused by materials, and improves the condition of the camera hole pollution while not influencing the detection operation.
Fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present invention. As shown in fig. 2, the apparatus includes a camera hole protective film 110 and a display panel 103; the imaging hole protective film 110 includes a first layer film 101 and a second layer film 102; the imaging hole protection film 110 is covered on the imaging hole 104 of the display panel 103, so that foreign matter contamination can be prevented during physical distribution transportation, and the first film 101 is peeled off before optical inspection, and the imaging hole 104 and the second film 102 enter optical inspection (Crack AOI) together.
The embodiment of the invention can solve the pollution problem in the transportation process, can carry out the Crack AOI operation by the protective film with the camera hole, has no new increase defect caused by materials, and improves the condition of the dirt of the camera hole while not influencing the detection operation.
Fig. 3 is a schematic flow chart illustrating a display device detection method according to an embodiment of the present invention. Fig. 4 is a schematic flow chart illustrating another display device detection method according to an embodiment of the present invention. As shown in fig. 3 and 4, the method includes:
s120: attaching a camera hole protective film to a camera hole of a display panel;
wherein, the hole protection film of making a video recording includes: the film comprises a first layer film and a second layer film, wherein the transmittance of the second layer film is greater than that of the first layer film; the first film is attached to the first surface of the second film. Specifically, the second surface of the second film is attached to the camera hole of the display panel.
S140: and carrying out optical detection on the camera hole of the display device with the first layer of film removed.
That is, before the optical inspection of the imaging hole, the first film of the imaging hole protective film is peeled off, and then the display device is subjected to the optical inspection of the imaging hole together with the second film attached thereto, that is, the automatic optical inspection of Crack (Crack AOI) is performed on the imaging hole region. The camera hole protective film also comprises a double-sided adhesive tape and a third film positioned on one side of the second film, which is far away from the first film; the double faced adhesive tape is positioned between the second layer film and the third layer film, and the area of the second layer film, which is right opposite to the camera shooting hole, is free of the double faced adhesive tape; the viscosity between the first layer of film and the first surface is a first viscosity, the viscosity between the double-sided adhesive tape and the display panel is a second viscosity, and the first viscosity is smaller than the second viscosity; the viscosity of the double-sided adhesive tape and the third layer of film is a third viscosity, and the viscosity of the double-sided adhesive tape and the second layer of film is a fourth viscosity; the fourth viscosity is greater than the third viscosity.
Therefore, before the step S120, the method may further include: the third layer film attached to the camera shooting hole protective film is torn off to expose the double faced adhesive tape, so that the double faced adhesive tape is attached to the camera shooting hole, and it can be understood that the double faced adhesive tape is attached to the peripheral area of the camera shooting hole.
After the step S140, the method may further include: and tearing off the second layer of film before attaching the composite adhesive tape SCF.
As a specific example, referring to fig. 4, in the optical detection, a camera hole protective Film is firstly attached (wherein, the first Film is equivalent to a conventional PET Film, and the second Film is equivalent to a high transmittance PET Film), then the camera hole protective Film is defoamed, after the first Film is torn off, automatic optical detection of cracks is performed, after ultraviolet curing, appearance inspection and Touch Film bonding (TFOF) are sequentially performed, the second Film is torn off, and finally, composite tape attachment is performed. It is understood that the protection film for the image capture hole may be applied to protect other hole regions of the display panel, besides the image capture hole of the display panel, and is not limited herein.
The embodiment of the application provides a display device detection method, which utilizes a camera hole protection film to protect a camera hole in a detection process, solves the problem of foreign matter pollution to a camera in the processes of assembly, detection, logistics and the like, and prevents the influences of scratch, dirt and the like while not influencing the detection operation.
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 (10)

1. A protection film for a camera hole, comprising:
a first layer of film;
a second layer of film having a transmittance greater than the transmittance of the first layer of film;
the first layer of film is attached to the first surface of the second layer of film, the second surface of the second layer of film is used for covering the shooting hole of the display panel, and the first viscosity between the first layer of film and the first surface is smaller than the second viscosity between the second surface and the display panel.
2. The imaging aperture protective film according to claim 1, wherein the second film has a transmittance of 90% or more.
3. The protective film for camera hole according to claim 1, wherein the first viscosity is 4 to 10 gf/inch; the second viscosity was 200-.
4. The camera hole protective film according to claim 1, wherein the highest temperature that the adhesive layer of the first layer of film can bear is 90 ℃;
preferably, an orthographic projection of the first layer of film on the display panel covers the camera hole.
5. The protection film for a camera hole according to claim 1, further comprising:
the third layer of film is positioned on one side of the second layer of film, which is far away from the first layer of film;
the double faced adhesive tape is positioned between the second layer of film and the third layer of film, and the area of the second layer of film, which is right opposite to the camera shooting hole, is free of the double faced adhesive tape;
the viscosity between the double-sided adhesive tape and the display panel is a second viscosity, the viscosity between the double-sided adhesive tape and the third layer of film is a third viscosity, and the viscosity between the double-sided adhesive tape and the second layer of film is a fourth viscosity; the fourth viscosity is greater than the third viscosity.
6. The protection film for camera hole of claim 5, wherein the double-sided adhesive tape is made of transparent and high temperature resistant material;
preferably, the maximum temperature that the double-sided adhesive tape can withstand is 90 ℃.
7. A display device comprising the protection film for camera hole according to any one of claims 1 to 6 and a display panel.
8. A display device detection method is characterized by comprising the following steps:
attaching a camera hole protective film to a camera hole of a display panel, wherein the camera hole protective film comprises a first layer of film and a second layer of film, and the transmittance of the second layer of film is greater than that of the first layer of film; the first layer of film is attached to the first surface of the second layer of film, and the second surface of the second layer of film is attached to the camera hole of the display panel;
and carrying out optical detection on the camera hole of the display device after the first layer of film is torn off.
9. The method of claim 8, wherein the camera hole protective film further comprises a double sided adhesive and a third layer of film on a side of the second layer of film remote from the first layer of film; the double faced adhesive tape is positioned between the second layer of film and the third layer of film, and the area of the second layer of film, which is right opposite to the camera shooting hole, is free of the double faced adhesive tape; the viscosity of the double-sided adhesive tape and the third layer of film is a third viscosity, and the viscosity of the double-sided adhesive tape and the second layer of film is a fourth viscosity; the fourth viscosity is greater than the third viscosity.
10. The method for inspecting a display device according to claim 9, further comprising, before attaching the camera hole protective film to the camera hole of the display panel:
and tearing off the third film of the camera hole protective film.
CN202111616559.3A 2021-12-27 2021-12-27 Camera hole protective film, display device and display device detection method Pending CN114292603A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111616559.3A CN114292603A (en) 2021-12-27 2021-12-27 Camera hole protective film, display device and display device detection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111616559.3A CN114292603A (en) 2021-12-27 2021-12-27 Camera hole protective film, display device and display device detection method

Publications (1)

Publication Number Publication Date
CN114292603A true CN114292603A (en) 2022-04-08

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CN202111616559.3A Pending CN114292603A (en) 2021-12-27 2021-12-27 Camera hole protective film, display device and display device detection method

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109375308A (en) * 2018-11-27 2019-02-22 上海天马微电子有限公司 polarizer film and display panel manufacturing method
CN212375211U (en) * 2019-10-08 2021-01-19 创维液晶器件(深圳)有限公司 Camera hole protection film
KR20210098108A (en) * 2020-01-31 2021-08-10 오지석 Smartphone camera lens protective film
WO2021168633A1 (en) * 2020-02-24 2021-09-02 京东方科技集团股份有限公司 Protective film module, display component and preparation method therefor, and heat dissipation component
CN214781607U (en) * 2020-12-30 2021-11-19 深圳市丽驰电子材料有限公司 Non-contact electronic camera hole protective film

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109375308A (en) * 2018-11-27 2019-02-22 上海天马微电子有限公司 polarizer film and display panel manufacturing method
CN212375211U (en) * 2019-10-08 2021-01-19 创维液晶器件(深圳)有限公司 Camera hole protection film
KR20210098108A (en) * 2020-01-31 2021-08-10 오지석 Smartphone camera lens protective film
WO2021168633A1 (en) * 2020-02-24 2021-09-02 京东方科技集团股份有限公司 Protective film module, display component and preparation method therefor, and heat dissipation component
CN214781607U (en) * 2020-12-30 2021-11-19 深圳市丽驰电子材料有限公司 Non-contact electronic camera hole protective film

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Application publication date: 20220408

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