WO2023221009A1 - 保护盖板及制作方法、显示装置 - Google Patents

保护盖板及制作方法、显示装置 Download PDF

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Publication number
WO2023221009A1
WO2023221009A1 PCT/CN2022/093707 CN2022093707W WO2023221009A1 WO 2023221009 A1 WO2023221009 A1 WO 2023221009A1 CN 2022093707 W CN2022093707 W CN 2022093707W WO 2023221009 A1 WO2023221009 A1 WO 2023221009A1
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WO
WIPO (PCT)
Prior art keywords
layer
protective film
thermoplastic
thermoplastic protective
ultra
Prior art date
Application number
PCT/CN2022/093707
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English (en)
French (fr)
Inventor
蔡宝鸣
杨学凯
徐策
Original Assignee
京东方科技集团股份有限公司
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Filing date
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Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to PCT/CN2022/093707 priority Critical patent/WO2023221009A1/zh
Priority to CN202280001255.2A priority patent/CN117794735A/zh
Publication of WO2023221009A1 publication Critical patent/WO2023221009A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • 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

Definitions

  • the present disclosure relates to the field of display technology, and in particular, to a protective cover, a manufacturing method, and a display device.
  • UTG Ultra-Thin Glass
  • inorganic material has many advantages in terms of high hardness, good optical properties, stable chemical properties, and ease of creases, and is the future development trend.
  • the protective cover includes an ultra-thin glass layer and at least one layer of thermoplastic protective film.
  • the ultra-thin glass layer has two opposing main surfaces. Wherein, at least one main surface is covered with the thermoplastic protective film.
  • the thickness of at least one layer of the thermoplastic protective film is greater than or equal to 10 ⁇ m.
  • At least part of the main surface is a plane
  • the plane includes a plurality of sides
  • the warpage of the plane is less than or equal to one-tenth of the longest side of the plane.
  • a first layer of the thermoplastic protective film is attached to the first main surface; the protective cover further includes: a functional film located on the first layer of the thermoplastic protective film facing away from the ultrasonic protective film. Thin glass layer on the surface.
  • the functional film includes: a hardened film and/or an anti-fingerprint film.
  • the thickness of the functional film ranges from 0.1 ⁇ m to 20 ⁇ m.
  • thermoplastic protective film is attached to the second major surface.
  • the thickness of the thermoplastic protective film ranges from 10 ⁇ m to 500 ⁇ m.
  • the Young's elastic modulus of the thermoplastic protective film is: 5Mpa ⁇ 10Gpa.
  • the material of the thermoplastic protective film includes at least one of thermoplastic polyurethane, polyamide, polycarbonate, polymethylmethacrylate, polyurethane, polyethylene, polyester resin, and transparent polyimide.
  • the thickness of the ultra-thin glass layer ranges from 10 ⁇ m to 100 ⁇ m.
  • the display device includes: a display panel and a protective cover as described in any of the above embodiments.
  • the protective cover is located on the display side of the display panel.
  • a method of manufacturing a protective cover includes: forming a thermoplastic protective film on the base layer; and transferring the thermoplastic protective film to at least one main surface of the ultra-thin glass layer through a heat press transfer process.
  • the step of forming a thermoplastic protective film on a base layer includes: forming a first layer of the thermoplastic protective film on a first base layer.
  • the step of transferring the thermoplastic protective film to at least one main surface of the ultra-thin glass layer through a hot press transfer process includes: transferring the first layer of the thermoplastic protective film through a hot press transfer process. printed onto the first major surface of the ultra-thin glass layer.
  • the step of forming a first layer of the thermoplastic protective film on the first base layer includes: coating a thermoplastic material on the first carrier layer, curing to form the first thermoplastic protective layer; and cutting the first thermoplastic protective film.
  • a bearing layer and the first thermoplastic protective layer form a first laminated structure.
  • the first laminated structure includes: the first base layer and the first layer of the thermoplastic protective film.
  • the step includes: forming a functional film on a surface of the first layer of the thermoplastic protective film facing away from the first base layer.
  • the step of transferring the first layer of the thermoplastic protective film to the first main surface of the ultra-thin glass layer through a hot press transfer process includes: using a hot press transfer process, covering the The first layer of the thermoplastic protective film having the functional film is transferred to the first major surface of the ultra-thin glass layer.
  • the step of forming a functional film on a surface of the first thermoplastic protective film facing away from the first base layer includes: forming a functional film on a surface of the first thermoplastic protective film facing away from the first carrier layer. Functional materials are coated on the surface and solidified to form a functional layer.
  • the step of cutting the first load-bearing layer and the first thermoplastic protective layer to form a first laminated structure includes: cutting the first load-bearing layer, the first thermoplastic protective layer and the functional layer, A first laminated structure is formed, and the first laminated structure includes: the first base layer, the first layer of the thermoplastic protective film and the functional film.
  • the step includes: forming a functional film on a surface facing away from the first layer of the thermoplastic protective film.
  • a first temporary protective film is formed on the surface.
  • the step of transferring the first layer of the thermoplastic protective film covered with the functional film to the first main surface of the ultra-thin glass layer through a hot press transfer process includes: removing the first layer of the thermoplastic protective film. A base layer; under set temperature and set pressure conditions, attach the surface of the first layer of the thermoplastic protective film toward the first base layer to the first main surface of the ultra-thin glass layer; remove The first temporary protective film.
  • the first layer of the thermoplastic protective film is attached to the first main surface of the ultra-thin glass layer toward the surface of the first base layer.
  • the method includes: treating the surface of the first layer of the thermoplastic protective film facing the first base layer to introduce acidic functional groups.
  • thermoplastic protective film covered with the functional film to the first main surface of the ultra-thin glass layer through a heat press transfer process , including: cutting the first layer of the thermoplastic protective film and the functional film so that the edges of the first layer of the thermoplastic protective film and the functional film are flush with the edge of the ultra-thin glass layer.
  • the step includes: The first layer of the thermoplastic protective film and the functional film are cut so that the first layer of the thermoplastic protective film, the functional film and the ultra-thin glass layer have the same shape and are equal in size.
  • the step of forming a thermoplastic protective film on a base layer includes: forming a second layer of the thermoplastic protective film on a second base layer.
  • the step of transferring the thermoplastic protective film to at least one main surface of the ultra-thin glass layer through a hot press transfer process includes: transferring the second layer of the thermoplastic protective film through a hot press transfer process. printed onto the second major surface of the ultra-thin glass layer.
  • the step of forming a second layer of the thermoplastic protective film on the second base layer includes: coating a thermoplastic material on the second carrier layer and curing to form the second thermoplastic protective layer; cutting the second layer of thermoplastic protective film.
  • the two carrier layers and the second thermoplastic protective layer form a second laminated structure, and the second laminated structure includes a second base layer and a second layer of the thermoplastic protective film.
  • the step includes: forming a second temporary layer on a surface of the second layer of the thermoplastic protective film facing away from the second base layer. Protective film.
  • the step of transferring the second layer of the thermoplastic protective film to the second main surface of the ultra-thin glass layer through a hot pressing transfer process includes: removing the second base layer; Under certain temperature and pressure conditions, the surface of the second layer of thermoplastic protective film facing the second base layer is bonded to the surface of the ultra-thin glass layer; and the second temporary protective film is removed.
  • the step includes: : Treating the surface of the second layer of the thermoplastic protective film facing the second base layer to introduce acidic functional groups.
  • the step includes: The two layers of thermoplastic protective film are cut so that the edge of the second layer of thermoplastic protective film is flush with the edge of the ultra-thin glass layer.
  • the step includes: The thermoplastic protective film is cut so that the second layer of thermoplastic protective film and the ultra-thin glass layer have the same shape and the same size.
  • the set temperature is 40°C to 200°C
  • the set pressure is 1Mpa to 20Mpa.
  • Figure 1 is a structural diagram of a display device according to some embodiments.
  • Figure 2 is a structural diagram of a display device according to some embodiments.
  • Figure 3 is a structural diagram of a display device according to some embodiments.
  • Figure 4 is a structural diagram of a display panel according to some embodiments.
  • Figure 5 is a structural diagram of a protective cover according to some embodiments.
  • Figure 6 is a structural diagram of a protective cover according to some embodiments.
  • Figure 7 is a structural diagram of a protective cover according to some embodiments.
  • Figure 8 is a flow chart of a method of manufacturing a protective cover according to some embodiments.
  • Figure 9 is a step diagram of a method of manufacturing a protective cover according to some embodiments.
  • Figure 10 is a structural diagram of a display device according to some embodiments.
  • Figure 11 is a flow chart of a method of manufacturing a protective cover according to some embodiments.
  • Figure 12 is a flow chart of a method of manufacturing a protective cover according to some embodiments.
  • Figure 13 is a step diagram of a method of manufacturing a protective cover according to some embodiments.
  • Figure 14 is a step diagram of a method of manufacturing a protective cover according to some embodiments.
  • Figure 15 is a structural diagram of a protective cover according to some embodiments.
  • Figure 16 is a flow chart of a method of manufacturing a protective cover according to some embodiments.
  • Figure 17 is a flow chart of a method of manufacturing a protective cover according to some embodiments.
  • Figure 18 is a step diagram of a method of manufacturing a protective cover according to some embodiments.
  • Figure 19 is a flow chart of a method of manufacturing a protective cover according to some embodiments.
  • Figure 20 is a flow chart of a method of manufacturing a protective cover according to some embodiments.
  • Figure 21 is a step diagram of a method of manufacturing a protective cover according to some embodiments.
  • Figure 22A is a flow chart of a method of manufacturing a protective cover according to some embodiments.
  • Figure 22B is a flow chart of a method of manufacturing a protective cover according to some embodiments.
  • Figure 23 is a step diagram of a method of manufacturing a protective cover according to some embodiments.
  • Figure 24 is a step diagram of a method of manufacturing a protective cover according to some embodiments.
  • Figure 25 is a step diagram of a method of manufacturing a protective cover according to some embodiments.
  • Figure 26 is a step diagram of a method of manufacturing a protective cover according to some embodiments.
  • Figure 27 is a structural diagram of a protective cover according to some embodiments.
  • Figure 28 is a flow chart of a method of manufacturing a protective cover according to some embodiments.
  • Figure 29 is a step diagram of a method of manufacturing a protective cover according to some embodiments.
  • Figure 30 is a flow chart of a method of manufacturing a protective cover according to some embodiments.
  • Figure 31 is a step diagram of a method of manufacturing a protective cover according to some embodiments.
  • Figure 32 is a flow chart of a method of manufacturing a protective cover according to some embodiments.
  • Figure 33 is a step diagram of a method of manufacturing a protective cover according to some embodiments.
  • Figure 34A is a flow chart of a method of manufacturing a protective cover according to some embodiments.
  • Figure 34B is a flow chart of a method of manufacturing a protective cover according to some embodiments.
  • Figure 35 is a step diagram of a method of manufacturing a protective cover according to some embodiments.
  • Figure 36 is a step diagram of a method of manufacturing a protective cover according to some embodiments.
  • Figure 37 is a step diagram of a method of manufacturing a protective cover according to some embodiments.
  • first and second are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as “first” and “second” may explicitly or implicitly include one or more of these features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.
  • connection and its derivatives may be used.
  • some embodiments may be described using the term “connected” to indicate that two or more components are in direct physical or electrical contact with each other.
  • the embodiments disclosed herein are not necessarily limited by the content herein.
  • At least one of A, B, and C includes the following combinations of A, B, and C: A only, B only, C only, a combination of A and B, a combination of A and C, a combination of B and C, and A , combination of B and C.
  • a and/or B includes the following three combinations: A only, B only, and a combination of A and B.
  • the term “if” is optionally interpreted to mean “when” or “in response to” or “in response to determining” or “in response to detecting,” depending on the context.
  • the phrase “if it is determined" or “if [stated condition or event] is detected” is optionally interpreted to mean “when it is determined" or “in response to the determination" or “on detection of [stated condition or event]” or “in response to detection of [stated condition or event]”.
  • Example embodiments are described herein with reference to cross-sectional illustrations and/or plan views that are idealized illustrations.
  • the thickness of layers and regions are exaggerated for clarity. Accordingly, variations from the shapes in the drawings due, for example, to manufacturing techniques and/or tolerances are contemplated.
  • example embodiments should not be construed as limited to the shapes of regions illustrated herein but are to include deviations in shapes that result from, for example, manufacturing. For example, an etched area shown as a rectangle will typically have curved features. Accordingly, the regions shown in the figures are schematic in nature and their shapes are not intended to illustrate the actual shapes of regions of the device and are not intended to limit the scope of the exemplary embodiments.
  • the display device 100 involved in the embodiments of the present disclosure may be, for example: a tablet computer, a mobile phone, an e-reader, a remote control, a personal computer (Personal Computer, for short). PC), laptop computer, personal digital assistant (Personal Digital Assistant, PDA for short), car equipment, Internet TV, wearable devices, televisions, etc.
  • the display device 100 may be a liquid crystal display (LCD).
  • the display device 100 may also be a self-luminous display device, such as an electroluminescent display device or a photoluminescent display device.
  • the electroluminescent display device may be an organic light-emitting diode (OLED) display device or a quantum dot light-emitting diode (Quantum Dot Light Emitting Diodes, QLED). ) display device.
  • the display device 100 is a photoluminescence display device
  • the photoluminescence display device may be a quantum dot photoluminescence display device. This disclosure does not limit the type of the display device 100 .
  • the display device 100 includes a display panel 200 and a protective cover 300 , where the protective cover 300 is located on the display side of the display panel 200 .
  • the display panel 200 is a liquid crystal display panel 200A.
  • the main structure of the liquid crystal display panel 200A includes an array substrate 21 , a cell alignment substrate 22 , and a liquid crystal layer 23 disposed between the array substrate 21 and the cell alignment substrate 22 .
  • Each sub-pixel of the array substrate 21 includes a thin film transistor 211 and a pixel electrode 212 located on the first substrate 210 .
  • the thin film transistor 211 includes an active layer, a source electrode, a drain electrode, a gate electrode, and a gate insulation layer. The source electrode and the drain electrode are respectively in contact with the active layer.
  • the pixel electrode 212 is electrically connected to the drain electrode of the thin film transistor 211.
  • the array substrate 21 further includes a common electrode 213 disposed on the first substrate 210 .
  • the pixel electrode 212 and the common electrode 213 may be disposed on the same layer.
  • both the pixel electrode 212 and the common electrode 213 have a comb-tooth structure including a plurality of strip-shaped sub-electrodes.
  • the pixel electrode 212 and the common electrode 213 may also be provided on different layers.
  • a first interlayer insulating layer 214 is provided between the pixel electrode 212 and the common electrode 213 .
  • a second interlayer insulating layer 215 is also provided between the common electrode 213 and the thin film transistor 211.
  • the array substrate 21 does not include the common electrode 213 .
  • the common electrode 213 may be located in the counter-cell substrate 22 .
  • the array substrate 21 further includes a flat layer 216 disposed on a side of the thin film transistor 211 and the pixel electrode 212 away from the first substrate 210 .
  • the cell alignment substrate 22 includes a color filter layer 221 disposed on the second substrate 220 .
  • the cell alignment substrate 22 may also be called a color filter substrate (Color Filter, CF for short).
  • the color filter layer 221 at least includes a red photoresist unit, a green photoresist unit and a blue photoresist unit.
  • the red photoresist unit, the green photoresist unit and the blue photoresist unit are respectively aligned with the sub-pixels on the array substrate 21. right.
  • the cell substrate 22 further includes a black matrix pattern 222 disposed on the second substrate 220.
  • the black matrix pattern 222 is used to separate the red photoresist unit, the green photoresist unit and the blue photoresist unit.
  • the liquid crystal display panel 200A further includes an upper polarizer 24 disposed on the side of the cell alignment substrate 22 away from the liquid crystal layer 23 and a lower polarizer 25 disposed on the side of the array substrate 21 away from the liquid crystal layer 23 .
  • the protective cover 300 is located on the side of the upper polarizer 24 away from the liquid crystal layer 23 .
  • the display panel 200 is an electroluminescent display panel 200B.
  • the display panel 200 is a flexible display panel.
  • OLED display panels have the advantages of being thin, flexible, colorful, high contrast, and fast response rate, and are currently one of the mainstream display panels.
  • the electroluminescent display panel 200B may include a display substrate 26 and an encapsulation layer 27 for encapsulating the display substrate 26 .
  • the encapsulation layer 27 may be an encapsulation film or an encapsulation substrate.
  • the above-mentioned sub-pixel includes a driving circuit and a light-emitting device provided on the third substrate 260 .
  • the driving circuit includes a plurality of thin film transistors 211 .
  • the light-emitting device includes an anode 261, a light-emitting functional layer 262, and a cathode 263.
  • the anode 261 is electrically connected to the drain of the thin film transistor 211 serving as a driving transistor among the plurality of thin film transistors 211.
  • the electroluminescent display panel 200B further includes a pixel defining layer 264.
  • the pixel defining layer 264 includes a plurality of opening areas, and the light-emitting functional layer 262 is disposed in one opening area.
  • light-emitting functional layer 262 includes a light-emitting layer.
  • the light-emitting functional layer 262 in addition to the light-emitting layer, also includes an electron transporting layer (Election Transporting Layer, referred to as ETL), an electron injection layer (Election Injection Layer, referred to as EIL), a hole transporting layer (Hole Transporting layer). Layer (HTL for short) and one or more layers of the Hole Injection Layer (HIL for short).
  • ETL electron transporting layer
  • EIL electron injection layer
  • Hole Transporting layer Hole Transporting layer
  • Layer HTL for short
  • HIL Hole Injection Layer
  • the electroluminescent display panel 200B further includes a flat layer 265 disposed between the driving circuit and the anode 261 .
  • the electroluminescent display panel 200B includes an active film layer 266 , a first gate metal layer Gate1 , a second gate metal layer Gate2 , and a first gate metal layer Gate2 .
  • the active film layer 266 and the first gate metal layer Gate1 are used to form at least part of the thin film transistor 211 in the driving circuit.
  • the active film layer 266 and the second gate metal layer Gate2 may be used to form the remaining parts of the driving circuit.
  • the transistor 211, and the first gate metal layer Gate1 and the second gate metal layer Gate2 are used to form a capacitor in the driving circuit.
  • the first source-drain metal layer SD and the second source-drain metal layer SD2 include a plurality of signal lines that transmit signals to the driving circuit, such as data lines, initialization signal lines, power signal lines, etc., which are not listed here.
  • the protective cover 300 is located on a side of the packaging layer 27 away from the third substrate 260 .
  • the display panel 200 includes a display area AA and a peripheral area BB located on at least one side of the display area AA.
  • the peripheral area BB is arranged around the display area AA.
  • a plurality of sub-pixels 210 (sub pixels) are provided in the display area AA.
  • the plurality of sub-pixels 210 are arranged in the display area AA according to specified rules.
  • the sub-pixels 210 are used for image display in the display panel 200.
  • the smallest unit, each sub-pixel 210 can display a single color, such as red, green or blue. By adjusting the brightness of sub-pixels 210 of different colors, color combination and superposition can achieve multiple color displays.
  • the display panel 200 has been introduced above, and the protective cover 300 will be introduced below.
  • Some embodiments of the present disclosure provide a protective cover 300. Refer to FIGS. 2 and 3.
  • the protective cover 300 may be located on the display side of the display panel 200.
  • the protective cover 300 includes an ultra-thin glass layer 310 and at least one thermoplastic protective film 320 .
  • the ultra-thin glass layer 310 has two opposite main surfaces 311 , and at least one main surface 311 is covered with a thermoplastic protective film 320 .
  • thermoplastic protective film 320 is provided on one main surface 311 of the ultra-thin glass layer 310 .
  • thermoplastic protective films 320 are provided on both main surfaces 311 of the ultra-thin glass layer 310 .
  • the thermoplastic protective film 320 has thermoplasticity, and under heating conditions, the thermoplastic protective film 320 has adhesiveness.
  • the protective cover 300 provided by some embodiments of the present disclosure can provide a good impact resistance effect on the main surface of the ultra-thin glass layer 310 by disposing a thermoplastic protective film 320 on at least one main surface 311 of the ultra-thin glass layer 310 , to improve the impact resistance of the protective cover 300 .
  • Some embodiments of the present disclosure provide a method of manufacturing a protective cover.
  • the method of manufacturing a protective cover includes the following steps S1 and S2.
  • thermoplastic protective film 320 on the base layer 400, please refer to FIG. 9 .
  • the thermoplastic protective film 320 may be formed through a coating process.
  • the thermoplastic protective film 320 has been formed before being transferred to the ultra-thin glass layer 310 .
  • thermoplastic protective film 320 Transfer the thermoplastic protective film 320 to at least one main surface 311 of the ultra-thin glass layer 310 through a hot pressing transfer process.
  • thermoplastic protective film 320 has thermoplasticity. Therefore, in step S2, under the hot pressing condition, the thermoplastic protective film 320 has viscosity. Therefore, when the thermoplastic protective film 320 is transferred to the main surface 311 of the ultra-thin glass layer 310, , the thermoplastic protective film 320 may be bonded to the ultra-thin glass layer 310.
  • the protective cover 300 includes an ultra-thin glass layer 310 and a thermosetting protective film located on one side of the ultra-thin glass layer 310, wherein the thermosetting protective film includes a thermosetting material.
  • the thermosetting material needs to be coated on the ultra-thin glass layer 310, and then dried to form a film.
  • shrinkage force will be generated on the ultra-thin glass layer 310, which may easily cause the ultra-thin glass layer 310 to warp.
  • the coating thickness of the thermosetting material can only be reduced, which will lead to a reduction in the thickness of the heat-fixed protective film.
  • the lower the thickness of the heat-fixed protective film the worse the impact resistance of the protective cover 300, and the easier it is for the ultra-thin glass layer 310 to break.
  • the ultra-thin glass layer 310 usually has a special shape, for example, as shown in FIG. 7 .
  • the thermoplastic protective film 320 has thermoplasticity, and the thermoplastic protective film 320 is formed on the surface of the ultra-thin glass layer 310 through a heat press transfer process.
  • thermoplastic protective film 320 has been formed before transfer, and there is no need to coat the surface of the ultra-thin glass layer 310 with thermoplastic material. Moreover, after the thermoplastic protective film 320 is transferred to the ultra-thin glass layer 310, it is not easy to cause damage to the ultra-thin glass layer 310. warping.
  • thermoplastic protective film 320 is formed on the main surface 311 of the ultra-thin glass layer 310 by heat transfer, it is not easy to cause the ultra-thin glass layer 310 to warp. Therefore, the thermoplastic protective film 320 can be made to have a larger The greater the thickness of the thermoplastic protective film 320, the better the impact resistance. Therefore, the protective cover 300 can have better impact resistance.
  • the thickness of at least one layer of thermoplastic protective film 320 is greater than or equal to 10 ⁇ m. Please refer to Figures 5 and 6.
  • the thickness of the thermoplastic protective film 320 is H1, and H1 ⁇ 10 ⁇ m, which can ensure that the protective cover 300 has a good impact resistance effect.
  • At least part of the main surface 311 is a plane, the plane includes multiple sides, and the warpage of the plane is less than or equal to one-tenth of the longest side in the plane.
  • a portion of the main surface 311 is a flat surface, and the remaining portion of the surface may be a curved surface.
  • the entire surface of the main surface 311 is a plane.
  • the main surface 311 includes multiple sides, and the multiple sides include a first side 3111 and a second side 3112 .
  • the length of the side 3111 is greater than the length of the second side 3112.
  • the length of the first side 3111 is L1.
  • the warpage of the plane is less than or equal to 0.1L1, that is, the maximum warpage height of the plane is less than or equal to 0.1L1.
  • the protective cover 300 provided by some embodiments of the present disclosure can still have a warpage of 0 or a small warpage when the thickness of the thermoplastic protective film 320 is relatively large. Spend. Therefore, when the protective cover 300 is disposed on the display panel 200, the protective cover 300 and the display panel 200 can be better fitted, thereby improving the display effect of the display panel 200.
  • thermoplastic protective film 320A is attached to the first major surface 311A.
  • thermoplastic protective film 320A is attached to the first main surface 311A of the ultra-thin glass layer 310 to protect the first main surface 311A of the ultra-thin glass layer 310 .
  • the second main surface 311B of the ultra-thin glass layer 310 can face the display panel 200 while the first main surface 311A faces away from the display panel 200 .
  • the first main surface 311A of the ultra-thin glass layer 310 is susceptible to impact. Therefore, by attaching the first layer of thermoplastic protective film 320A to the first main surface 311A of the ultra-thin glass layer 310, the protective cover 300 can have better impact resistance.
  • step S1 forming the thermoplastic protective film 320 on the base layer 400, including: S11, forming a first layer of thermoplastic protective film 320A on the first base layer 410.
  • step S11 a first layer of thermoplastic protective film 320A may be formed on the first base layer 410 through a coating process.
  • step S2 the step of transferring the thermoplastic protective film 320 to at least one main surface 311 of the ultra-thin glass layer 310 through a hot press transfer process, includes: S21, using a hot press transfer process, The first layer of thermoplastic protective film 320A is transferred to the first major surface 311A of the ultra-thin glass layer 310 .
  • the first base layer 410 Before transferring the first layer of thermoplastic protective film 320A to the first main surface 311A of the ultra-thin glass layer 310, the first base layer 410 can be removed, so that the first layer of thermoplastic protective film 320A faces the first base layer.
  • the surface of 410 is bonded to the first major surface 311A.
  • the surface of the first thermoplastic protective film 320A facing away from the first base layer 410 can be bonded to the first main surface 311A, and after transfer, the first base layer 410 is removed.
  • the step of forming a first layer of thermoplastic protective film 320A on the first base layer 410 includes: the following steps S111 and S112.
  • the first bearing layer 411 has a larger area, and the first bearing layer 411 may include multiple first base layers 410 .
  • step S111 a solution including a thermoplastic material can be coated on the first bearing layer 411, and then dried to evaporate the solvent in the solution, so that the thermoplastic material solidifies to form the first thermoplastic protective layer 321A.
  • the first thermoplastic protective layer 321A may be prepared in a roll-to-roll manner.
  • the first thermoplastic protective layer 321A may include a plurality of first thermoplastic protective films 320A. Therefore, in some embodiments of the present disclosure, multiple first-layer thermoplastic protective films 320A can be formed through a single coating process, without the need to separately make a first-layer thermoplastic protective film 320A for each ultra-thin glass layer 310. Therefore, The number of coating processes can be reduced, thereby reducing costs.
  • first bearing layer 411 can be arranged in a rectangular shape, so that when the first bearing layer 411 is coated with the thermoplastic material, the base will not be contaminated.
  • the first thermoplastic protective layer 321A and the first bearing layer 411 can be defined as the initial laminated structure 500 .
  • the first laminated structure 510 includes: a first base layer 410 and a first layer of thermoplastic protective film 320A.
  • the initial stacked structure 500 may be divided into a plurality of first stacked structures 510 .
  • the protective cover 300 further includes: a functional film 330 , the functional film 330 is located on the surface of the first thermoplastic protective film 320A facing away from the ultra-thin glass layer 310 .
  • the protective cover 300 can have other functions.
  • the thickness H2 of the functional film 330 is: 0.1 ⁇ m ⁇ 20 ⁇ m.
  • the thickness H2 of the functional film 330 is: 3 ⁇ m ⁇ 20 ⁇ m.
  • step S11 after the step of forming the first layer of thermoplastic protective film 320A on the first base layer 410, includes: S12, forming the first layer of thermoplastic protective film 320A away from the first layer.
  • a functional film 330 is formed on the surface of the base layer 410 .
  • step S21 the step of transferring the first layer of thermoplastic protective film 320A to the first main surface 311A of the ultra-thin glass layer 310 through a hot press transfer process, including: S22, transferring through hot press In a printing process, the first thermoplastic protective film 320A covered with the functional film 330 is transferred to the first main surface 311A of the ultra-thin glass layer 310 .
  • the functional film 330 has been formed on the first layer of thermoplastic protective film 320A before thermal pressure transfer.
  • the functional film 330 may be formed through a coating process.
  • step S22 the first base layer 410 on the first layer of thermoplastic protective film 320A may be removed first, thereby exposing the first layer of thermoplastic protective film 320A, and then the first layer of thermoplastic protective film 320A may face one side of the first base layer 410. The side is attached to the first major surface 311A of the ultra-thin glass layer 310 .
  • the step of forming the functional film 330 on the surface of the first thermoplastic protective film 320A facing away from the first base layer 410 includes: S121, forming the functional film 330 on the surface of the first thermoplastic protective film 320A facing away from the first base layer 410.
  • Functional material is coated on the surface of the carrier layer 411 and solidified to form the functional layer 331.
  • step S121 can be completed after step S111.
  • the functional layer 331 may be formed through a coating process.
  • a solution including the functional material is coated on the surface of the first thermoplastic protective layer 321A facing away from the first carrier layer 411 . Then, the solvent in the solution is evaporated, thereby solidifying the functional material to form the functional layer 331 .
  • the initial laminated structure 500 includes the first carrier layer 411 , the first thermoplastic protective layer 321A and the functional layer 331 .
  • step S112 cutting the first bearing layer 411 and the first thermoplastic protective layer 321A to form the first laminated structure 510 includes: S113, cutting the first bearing layer 411, the first thermoplastic protective layer 321A and The functional layer 331 forms a first laminated structure 510.
  • the first laminated structure 510 includes: a first base layer 410, a first layer of thermoplastic protective film 320A and a functional film 330.
  • the initial stacked structure 500 may be divided into a plurality of first stacked structures 510 .
  • the functional film 330 includes: a hardened film and/or an anti-fingerprint film.
  • the functional film 330 may only include a hardening film, and the hardening film may protect the first thermoplastic protective film 320A to prevent the first thermoplastic protective film 320A from being scratched during use of the display device 100 .
  • the thickness of the hardened film ranges from 0.1 ⁇ m to 20 ⁇ m.
  • the thickness of the hardened film is: 3 ⁇ m ⁇ 20 ⁇ m.
  • step S121 a solution including a hardening material is coated on the surface of the first thermoplastic protective layer 321A facing away from the first bearing layer 411 . Then the solvent in the solution is evaporated, so that the hardened material is solidified to form a hardened layer. At this time, the hardened layer is the above-mentioned functional layer 331.
  • the materials of the hardened film include polyester resin (PET), polymethyl methacrylate (PMMA), triacetate, cellulose ester (TAC), polycycloolefin (COP), polyimide (PI) at least one of them.
  • PET polyester resin
  • PMMA polymethyl methacrylate
  • TAC cellulose ester
  • COP polycycloolefin
  • PI polyimide
  • the functional film 330 may only include an anti-fingerprint film.
  • the anti-fingerprint film By providing the anti-fingerprint film, fingerprints formed on the surface of the protective cover 300 during use of the display device 100 can be reduced, thereby improving the user experience.
  • the thickness of the anti-fingerprint film is: 0.1 ⁇ m ⁇ 20 ⁇ m.
  • the thickness of the anti-fingerprint film is: 3 ⁇ m ⁇ 20 ⁇ m.
  • the anti-fingerprint film can be derived from a multifunctional (meth)acrylate polymer having (meth)acrylic groups, a multifunctional urethane having 6-15 (meth)acrylic groups as functional groups (Meth)acrylate oligomers, polyfunctional (meth)acrylate monomers having 2 to 6 (meth)acrylic acid groups, and fluorinated (meth)acrylate monomers.
  • the (meth)acrylic group is an expression indicating that it may have a methacrylate group or an acrylate group at the same time.
  • step S121 a solution including an anti-fingerprint material is coated on the surface of the first thermoplastic protective layer 321A facing away from the first bearing layer 411 . Then the solvent in the solution is evaporated, so that the anti-fingerprint material is solidified to form an anti-fingerprint layer. At this time, the anti-fingerprint layer is the above-mentioned functional layer 331.
  • the functional film 330 includes: a hardening film and an anti-fingerprint film.
  • the anti-fingerprint film is disposed on a surface of the hardening film facing away from the first thermoplastic protective layer 321A, so that the functional film 330 can protect both the first thermoplastic layer and the first thermoplastic protective layer 321A.
  • the protective film 320A also has anti-fingerprint function.
  • step S121 the step of coating a functional material on the surface of the first thermoplastic protective layer 321A away from the first bearing layer 411, and curing to form the functional layer 331, including the following steps: S1211 and S1212.
  • anti-fingerprint materials can also be doped into the cured film, so that the cured film can not only protect the first layer of thermoplastic protective film 320A, but also have an anti-fingerprint function.
  • step S12 forming the functional film 330 on the surface of the first thermoplastic protective film 320A facing away from the first base layer 410
  • the method includes: S13, forming the functional film 330 away from the first layer.
  • the first temporary protective film 610 is formed on the surface of the thermoplastic protective film 320A.
  • the first laminated structure 510 formed in step S13 includes a first base layer 410 , a first thermoplastic protective film 320A, a functional film 330 and a first temporary protective film 610 .
  • the first temporary protective film 610 can protect the functional film 330, thereby preventing the functional film 330 from being scratched before the first layer of thermoplastic protective film 320A is transferred to the ultra-thin glass layer 310.
  • the step of forming the first temporary protective film 610 on the surface of the functional film 330 facing away from the first thermoplastic protective film 320A includes: S131, forming the first temporary protective film 610 on the functional layer 331 facing away from the first thermoplastic protective film.
  • the first temporary protective layer 611 is attached to one side of the layer 321A.
  • step S131 may be executed after step S121.
  • the initial laminated structure 500 includes a first bearing layer 411 , a first thermoplastic protective layer 321A, a functional layer 331 and a first temporary protective layer 611 .
  • the step of cutting the first load-bearing layer 411, the first thermoplastic protective layer 321A and the functional layer 331 to form the first laminated structure 510 also includes: S114. Cutting the first load-bearing layer 411, the first thermoplastic protective layer 321A, and the functional layer. The layer 331 and the first temporary protective layer 611 form the first stacked structure 510. At this time, the first laminated structure 510 is formed as shown in FIG. 23 .
  • the first laminated structure 510 includes a first base layer 410 , a first layer of thermoplastic protective film 320A, a functional film 330 and a first temporary protective film 610 .
  • Step S114 is executed after step S131.
  • step S22 the step of transferring the first layer of thermoplastic protective film 320A covered with the functional film 330 to the first main surface 311A of the ultra-thin glass layer 310 through a hot pressing transfer process. , including: the following steps S221 to S224.
  • the step includes: S222, treating the surface of the first thermoplastic protective film 320A facing the first base layer 410 to introduce acidic functional groups.
  • step S222 the surface of the first thermoplastic protective film 320A can be treated through processes such as pickling, plasma treatment, etc., so that the acidic functional groups (such as -COOH, -C 2 H 2 ) on the surface of the first thermoplastic protective film 320A O 4 , etc.) increased.
  • the acidic functional groups such as -COOH, -C 2 H 2
  • Step S222 is before step S233 of laminating the surface of the first thermoplastic protective film 320A facing the first base layer 410 to the first main surface 311A of the ultra-thin glass layer 310 .
  • step S223 the surface of the first layer of thermoplastic protective film 320A facing away from the functional film 330 is bonded to the first main surface 311A.
  • the surface of the ultra-thin glass layer 310 has abundant catenary-OH structures.
  • the catenary-OH structure can undergo a lipid exchange reaction with acidic functional groups, that is, the catenary-OH structure Combining with acidic functional groups can further increase the bonding force between the ultra-thin glass layer 310 and the first thermoplastic protective film 320A, and increase the bonding effect between the ultra-thin glass layer 310 and the first thermoplastic protective film 320A.
  • the ultra-thin glass layer 310 also contains silicon dioxide (SiO2).
  • SiO2 silicon dioxide
  • the dipole effect between the polymer ester group in the first thermoplastic protective film 320A and the silicon dioxide layer can also increase the ultra-thin glass layer.
  • step S224 Remove the first temporary protective film 610.
  • step S224 after the first temporary protective film 610 is removed, the protective cover 300 as shown in FIG. 15 is formed.
  • the first layer of thermoplastic protective film 320A covered with the functional film 330 is transferred to the first main surface 311A of the ultra-thin glass layer 310 through a heat pressing transfer process.
  • the steps include: S231, cutting the first layer of thermoplastic protective film 320A and the functional film 330 so that the edges of the first layer of thermoplastic protective film 320A and the functional film 330 are flush with the edge of the ultra-thin glass layer 310.
  • the ultra-thin glass layer 310 is usually shaped, and the stacked structure formed by the first layer of thermoplastic protective film 320A and the functional film 330 is a rectangular structure.
  • the first layer of thermoplastic protective film 320A covered with the functional film 330 After being transferred to the ultra-thin glass layer 310, the edge of the laminated structure is located outside the area where the ultra-thin glass layer 310 is located.
  • the laminated structure is cut so that the edge of the laminated structure is in line with the edge of the ultra-thin glass layer 310. The edges are flush.
  • step S224 may be performed before step S231. In other examples, step S224 may be performed after step S231. At this time, in step S231, while cutting the first layer of thermoplastic protective film 320A, the first temporary protective film 610 is also cut. After cutting, , execute step S224 to remove the first temporary protective film 610 .
  • the first layer of thermoplastic protective film 320A covered with the functional film 330 is transferred to the first main surface of the ultra-thin glass layer 310 through a heat pressing transfer process.
  • step 311A include: S232, cutting the first thermoplastic protective film 320A and the functional film 330 so that the first thermoplastic protective film 320A, the functional film 330 and the ultra-thin glass layer 310 have the same shape and the same size.
  • the first layer of thermoplastic protective film 320A and the functional film 330 are cut, so that after the first layer of thermoplastic protective film 320A covered with the functional film 330 is transferred to the ultra-thin glass layer 310, The edges of the first thermoplastic protective film 320A and the functional film 330 may be flush with the edges of the ultra-thin glass layer 310 .
  • thermoplastic protective film 320B is attached to the second main surface 311B of the ultra-thin glass layer 310 .
  • thermoplastic protective film 320 is provided on the first main surface 311A and the second main surface 311B of the ultra-thin glass layer 310, which can further improve the impact resistance of the protective cover 300 and prevent the ultra-thin glass layer 310 from breaking. .
  • thermoplastic protective film 320 on the base layer 400 includes: S14. Forming a second layer of thermoplastic protective film 320B on the second base layer 420.
  • a second layer of thermoplastic protective film 320B may be formed on the second base layer 420 through a coating process.
  • step S2 the step of transferring the thermoplastic protective film 320 to at least one main surface 311 of the ultra-thin glass layer 310 through a hot press transfer process, includes: S24, using a hot press transfer process, The second layer of thermoplastic protective film 320B is transferred to the second major surface 311B of the ultra-thin glass layer 310 .
  • the second layer of thermoplastic protective film 320B has adhesiveness, thereby bonding with the ultra-thin glass layer 310 .
  • the step of forming a second layer of thermoplastic protective film 320B on the second base layer 420 includes: the following steps S141 and S142.
  • the second bearing layer 421 has a larger area, and the second bearing layer 421 may include multiple second base layers 420 .
  • step S141 a solution including a thermoplastic material can be coated on the second bearing layer 421, and then dried to evaporate the solvent in the solution, so that the thermoplastic material solidifies to form the second thermoplastic protective layer 321B.
  • the second thermoplastic protective layer 321B may include a plurality of second thermoplastic protective films 320B. Therefore, in some embodiments of the present disclosure, multiple second-layer thermoplastic protective films 320B can be formed through a single coating process, without the need to separately make a second-layer thermoplastic protective film 320B for each ultra-thin glass layer 310. Therefore, The number of coating processes can be reduced, thereby reducing costs.
  • the second laminated structure 520 includes the second base layer 420 and the second layer of thermoplastic protective film 320B.
  • step S142 referring to FIG. 31, the second bearing layer 421 and the second thermoplastic protective layer 321B are cut to form a second laminated structure 520 as shown in FIG. 29.
  • S14 after the step of forming the second layer of thermoplastic protective film 320B on the second base layer 420, includes: S15. After the second layer of thermoplastic protective film 320B faces away from the second base layer A second temporary protective film 620 is formed on the surface of 420 .
  • the second laminated structure 520 formed in step S15 includes a second base layer 420 , a second thermoplastic protective film 320B and a second temporary protective film 620 .
  • the second temporary protective film 620 can protect the second layer of thermoplastic protective film 320B, thereby preventing the second layer of thermoplastic protective film 320B from being scratched before the second layer of thermoplastic protective film 320B is transferred to the ultra-thin glass layer 310 hurt.
  • the step of forming the second temporary protective film 620 on the surface of the second thermoplastic protective film 320B facing away from the second base layer 420 includes: S151, the second thermoplastic protective layer 321B facing away from the second base layer 420.
  • a second temporary protective layer 621 is attached to one side of the second load-bearing layer 421, see Figure 35.
  • step S151 may be executed after step S141.
  • Cutting the second bearing layer 421 and the second thermoplastic protective layer 321B to form the second laminated structure 520 includes: S143. Cutting the second bearing layer 421, the second thermoplastic protective layer 321B and the second temporary protective layer 621 , forming the second stacked structure 520. At this time, the second laminated structure 520 includes: a second base layer 420, a second thermoplastic protective film 320B and a second temporary protective film 620.
  • the second stacked structure 520 formed in step S142 is shown in FIG. 33 .
  • the step of transferring the second layer of thermoplastic protective film 320B to the second main surface 311B of the ultra-thin glass layer 310 through a hot press transfer process includes the following steps S241 to S244.
  • the step includes: S242, treating the surface of the second thermoplastic protective film 320B facing the second base layer 420 to introduce acidic functional groups.
  • the surface of the second thermoplastic protective film 320B facing the second base layer 420 is the surface of the second thermoplastic protective film 320B facing away from the second temporary protective film 620 .
  • step S242 the surface of the second thermoplastic protective film 320B can be treated through processes such as pickling and plasma treatment, so that the acidic functional groups (such as -COOH, -C 2 H 2 ) on the surface of the second thermoplastic protective film 320B O 4 , etc.) increased.
  • the acidic functional groups such as -COOH, -C 2 H 2
  • Step S242 is performed before step S243 of bonding the second layer of thermoplastic protective film 320B toward the surface of the second base layer 420 and the surface of the ultra-thin glass layer 310.
  • the surface of the second layer of thermoplastic protective film 320B facing away from the second temporary protective film 620 is bonded to the second main surface 311B.
  • the surface of the ultra-thin glass layer 310 has abundant catenary-OH structures.
  • the catenary-OH structure can undergo a lipid exchange reaction with acidic functional groups, that is, the catenary-OH structure and acidic
  • the combination of functional groups can further increase the bonding force between the ultra-thin glass layer 310 and the second layer of thermoplastic protective film 320B, and increase the bonding effect between the ultra-thin glass layer 310 and the second layer of thermoplastic protective film 320B.
  • the ultra-thin glass layer 310 also contains silicon dioxide (SiO2).
  • SiO2 silicon dioxide
  • the dipole effect between the polymer ester group in the second thermoplastic protective film 320B and the silicon dioxide layer can also increase the ultra-thin glass layer.
  • step S244 after the second temporary protective film 620 is removed, the protective cover 300 as shown in FIG. 27 is formed.
  • S24 after the step of transferring the second layer of thermoplastic protective film 320B to the second main surface 311B of the ultra-thin glass layer 310 through a heat press transfer process, includes: S251. Cut the second layer of thermoplastic protective film 320B so that the edge of the second layer of thermoplastic protective film 320B is flush with the edge of the ultra-thin glass layer 310.
  • the ultra-thin glass layer 310 is usually shaped, and the second layer of thermoplastic protective film 320B has a rectangular structure before transfer. After the second layer of thermoplastic protective film 320B is transferred to the ultra-thin glass layer 310, the second layer of thermoplastic protective film 320B The edge is located outside the area where the ultra-thin glass layer 310 is located. In step S251, the second layer of thermoplastic protective film 320B is cut so that the edge of the second layer of thermoplastic protective film 320B is flush with the edge of the ultra-thin glass layer 310.
  • step S244 may be performed before step S251. In other examples, step S244 may be performed after step S251. At this time, in step S251, while the second layer of thermoplastic protective film 320B is being cut, the second temporary protective film 620 is also cut. , execute step S244 to remove the second temporary protective film 620.
  • thermoplastic protective film 320B before the step of transferring the second layer of thermoplastic protective film 320B to the second main surface 311B of the ultra-thin glass layer 310 through a heat press transfer process, It includes: S252, cutting the second layer of thermoplastic protective film 320B so that the second layer of thermoplastic protective film 320B and the ultra-thin glass layer 310 have the same shape and the same size.
  • the second layer of thermoplastic protective film 320B is cut, so that after the second layer of thermoplastic protective film 320B is transferred to the ultra-thin glass layer 310, the edge of the second layer of thermoplastic protective film 320B can be aligned with the ultra-thin glass layer 310.
  • the thin glass layer 310 has flush edges.
  • cutting the second layer of thermoplastic protective film 320B in step S251 and cutting the first layer of thermoplastic protective film 320A and the functional film 330 in step S231 can be performed simultaneously.
  • the first main surface 311A of the ultra-thin glass layer 310 is only provided with the first layer of thermoplastic protective film 320A without the functional film 330. At this time, the first layer of thermoplastic protective film 320A and the second layer of thermoplastic protective film 320A are not provided with the functional film 330.
  • the thermoplastic protective layer 321B may be formed in one process.
  • the manufacturing method of the protective cover includes: coating a thermoplastic material on the bearing layer and curing to form a thermoplastic protective layer.
  • a protective layer is formed on a side of the thermoplastic protective layer facing away from the load-bearing layer.
  • the bearing layer, the thermoplastic protective layer and the protective layer are cut to form multiple third laminated structures; the third laminated structure includes a base layer, a thermoplastic protective film 320 and a temporary protective film.
  • the bearing layer may include multiple base layers, and the multiple base layers include a first base layer 410 and a second base layer 420 .
  • the plurality of protective layers may include a plurality of temporary protective films, including a first temporary protective film 610 and a second temporary protective film 620 .
  • the thermoplastic protective layer may include multiple thermoplastic protective films, wherein the multiple thermoplastic protective films include a first layer of thermoplastic protective film 320A and a second layer of thermoplastic protective film 320B.
  • the plurality of third laminated structures include a first laminated structure 510 and a second laminated structure 520, wherein the first laminated structure 510 includes a first base layer 410, a first layer of thermoplastic protective film 320A and a first layer of thermoplastic protective film 320A.
  • the first layer of thermoplastic protective film 320A is transferred to the first main surface 311A of the ultra-thin glass layer 310 through a heat press transfer process.
  • the first base layer 410 can be removed first, so that the surface of the first thermoplastic protective film 320A facing the first base layer 410 is exposed, and then the surface of the first thermoplastic protective film 320A facing the first base layer 410 is processed. to increase the acidic functional groups on the surface of the first thermoplastic protective film 320A facing the first base layer 410, and then transfer the first thermoplastic protective film 320A to the first layer of the ultra-thin glass layer 310 under the set temperature and set pressure. A main surface 311A. After that, the first temporary protective film 610 is removed. Finally, the first layer of thermoplastic protective film 320A is cut so that the edge of the first layer of thermoplastic protective film 320A is flush with the edge of the ultra-thin glass layer 310 .
  • the second layer of thermoplastic protective film 320B is transferred to the second main surface 311B of the ultra-thin glass layer 310 through a heat press transfer process.
  • the second base layer 420 can be removed first, so that the surface of the second thermoplastic protective film 320B facing the second base layer 420 is exposed, and then the surface of the second thermoplastic protective film 320B facing the second base layer 420 is processed. to increase the acidic functional groups on the surface of the second layer of thermoplastic protective film 320B facing the second base layer 420, and then transfer the second layer of thermoplastic protective film 320B to the second layer of the ultra-thin glass layer 310 under the set temperature and set pressure. A main surface 311B. After that, the second temporary protective film 620 is removed. Finally, the second layer of thermoplastic protective film 320B is cut so that the edge of the second layer of thermoplastic protective film 320B is flush with the edge of the ultra-thin glass layer 310 .
  • first layer of thermoplastic protective film 320A and the second layer of thermoplastic protective film 320B may be cut simultaneously.
  • the set temperature is 40°C to 200°C
  • the set pressure is 1Mpa to 20Mpa.
  • thermoplastic protective film 320 is transferred to the ultra-thin glass layer 310, which can make the thermoplastic protective film 320 and the ultra-thin glass layer 310 have stronger characteristics.
  • the binding force ensures that the protective cover 300 has good stability.
  • the thickness H1 of the thermoplastic protective film 320 is 10 ⁇ m ⁇ 500 ⁇ m.
  • thermoplastic protective film 320 includes a first layer of thermoplastic protective film 320A and/or a second layer of thermoplastic protective film 320B.
  • 10 ⁇ m ⁇ H1 ⁇ 500 ⁇ m prevents the thickness H1 of the plastic protective film 320 from being too large (for example, greater than 500 ⁇ m), causing the plastic protective film 320 to be difficult to bend.
  • the thickness H1 of the first layer of thermoplastic protective film 320A is too small (for example, less than 10 ⁇ m), resulting in poor impact resistance of the protective cover 300 .
  • the thickness H1 of the thermoplastic protective film 320 is 160 ⁇ m ⁇ 350 ⁇ m.
  • the Young's elastic modulus of the thermoplastic protective film 320 is: 5Mpa ⁇ 10Gpa.
  • the modulus of the thermoplastic protective film 320 is too large (for example, greater than 10 Gpa), causing the thermoplastic protective film 320 to be difficult to bend.
  • the modulus of the thermoplastic protective film 320 is too small (for example, less than 5 MPa), resulting in poor impact resistance of the protective cover 300 .
  • the material of the thermoplastic protective film 320 includes at least one of thermoplastic polyurethane, polyamide, polycarbonate, polymethyl methacrylate, polyurethane, polyethylene, polyester resin, and transparent polyimide.
  • the thickness H3 of the ultra-thin glass layer 310 is: 10 ⁇ m ⁇ 100 ⁇ m.
  • the display device 100 provided by some embodiments of the present disclosure includes the protective cover 300 provided by any of the above embodiments. Therefore, the display device 100 provided by some embodiments of the present disclosure has the protective cover provided by any of the above embodiments. All beneficial effects of the board 300 will not be described in detail here.

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Abstract

一种保护盖板。保护盖板（300）包括超薄玻璃层（310）和至少一层热塑性保护膜（320），超薄玻璃层（310）具有相对的两个主表面（311），至少一个主表面（311）上贴覆有热塑性保护膜（320）。

Description

保护盖板及制作方法、显示装置 技术领域
本公开涉及显示技术领域，尤其涉及一种保护盖板及制作方法、显示装置。
背景技术
近年来，终端显示屏出现了很多新型设计，其中折叠终端大放异彩。
在现有技术中，一般使用高分子材料作为第一表面，但其光学性能差、硬度低、折痕严重等一直限制其继续发展。UTG(Ultra-Thin Glass，超薄玻璃)作为无机材料，其具有硬度高、光学性能好、化学性能稳定、缓解折痕等方面有很有优势，是未来发展的趋势。
发明内容
一方面，提供一种保护盖板。所述保护盖板包括超薄玻璃层和至少一层热塑性保护膜。所述超薄玻璃层具有相对的两个主表面。其中，至少一个主表面上贴覆有所述热塑性保护膜。
在一些实施例中，至少一层所述热塑性保护膜的厚度大于或等于10μm。
在一些实施例中，所述主表面中的至少部分表面为平面，所述平面包括多个边，所述平面的翘曲度小于或等于所述平面中最长边的十分之一。
在一些实施例中，第一个所述主表面上贴附有第一层所述热塑性保护膜；所述保护盖板还包括：功能膜，位于第一层所述热塑性保护膜背离所述超薄玻璃层的表面。
在一些实施例中，所述功能膜包括：硬化膜和/或防指纹膜。
在一些实施例中，所述功能膜的厚度为：0.1μm～20μm。
在一些实施例中，第二个所述主表面上贴附有第二层所述热塑性保护膜。
在一些实施例中，所述热塑性保护膜的厚度为10μm～500μm。
在一些实施例中，所述热塑性保护膜的杨氏弹性模量为：5Mpa～10Gpa。
在一些实施例中，所述热塑性保护膜的材料包括热塑性聚氨酯、聚酰胺、聚碳酸酯、聚甲基丙烯酸甲酯、聚氨酯、聚乙烯、涤纶树脂、透明聚酰亚胺中的至少一个。
在一些实施例中，所述超薄玻璃层的厚度为：10μm～100μm。
另一方面，提供一种显示装置。所述显示装置包括：显示面板和如上述任一实施例所述的保护盖板。所述保护盖板位于所述显示面板的显示侧。
又一方面，提供一种保护盖板的制作方法。所述保护盖板的制作方法包 括：在基层上形成热塑性保护膜；通过热压转印工艺，将所述热塑性保护膜转印至超薄玻璃层的至少一个主表面上。
在一些实施例中，所述在基层上形成热塑性保护膜的步骤，包括：在第一基层上形成第一层所述热塑性保护膜。
所述通过热压转印工艺，将所述热塑性保护膜转印至超薄玻璃层的至少一个主表面上的步骤，包括：通过热压转印工艺，将第一层所述热塑性保护膜转印至所述超薄玻璃层的第一个所述主表面上。
在一些实施例中，所述在第一基层上形成第一层所述热塑性保护膜的步骤，包括：在第一承载层上涂覆热塑性材料，固化形成第一热塑性保护层；切割所述第一承载层和所述第一热塑性保护层，形成第一叠层结构，所述第一叠层结构包括：所述第一基层和第一层所述热塑性保护膜。
在一些实施例中，所述在第一基层上形成第一层所述热塑性保护膜的步骤之后，包括：在第一层所述热塑性保护膜背离所述第一基层的表面上形成功能膜。
所述通过热压转印工艺，将第一层所述热塑性保护膜转印至所述超薄玻璃层的第一个所述主表面上的步骤，包括：通过热压转印工艺，将覆盖有所述功能膜的第一层所述热塑性保护膜转印至所述超薄玻璃层的第一个所述主表面上。
在一些实施例中，所述在第一层所述热塑性保护膜背离所述第一基层的表面上形成功能膜的步骤，包括：在所述第一热塑性保护层背离所述第一承载层的表面上涂覆功能材料，固化形成功能层。
所述切割所述第一承载层和所述第一热塑性保护层，形成第一叠层结构的步骤，包括：切割所述第一承载层、所述第一热塑性保护层和所述功能层，形成第一叠层结构，所述第一叠层结构包括：所述第一基层、第一层所述热塑性保护膜和所述功能膜。
在一些实施例中，所述在第一层所述热塑性保护膜背离所述第一基层的表面上形成功能膜的步骤之后，包括：在所述功能膜背离第一层所述热塑性保护膜的表面上形成第一临时保护膜。
所述通过热压转印工艺，将覆盖有所述功能膜的第一层所述热塑性保护膜转印至超薄玻璃层的第一个所述主表面上的步骤，包括：去除所述第一基层；在设定温度和设定压力条件下，将第一层所述热塑性保护膜朝向所述第一基层的表面与所述超薄玻璃层的第一个所述主表面贴合；去除所述第一临时保护膜。
在一些实施例中，在所述去除所述第一基层的步骤之后，且第一层所述热塑性保护膜朝向所述第一基层的表面与超薄玻璃层的第一个所述主表面贴合的步骤之前，包括：对第一层所述热塑性保护膜朝向所述第一基层的表面进行处理，以引入酸性官能团。
在一些实施例中，所述通过热压转印工艺，将覆盖有所述功能膜的第一层所述热塑性保护膜转印至超薄玻璃层的第一个所述主表面上的步骤之后，包括：对第一层所述热塑性保护膜和所述功能膜进行切割，使第一层所述热塑性保护膜和所述功能膜的边缘与所述超薄玻璃层的边缘平齐。
或者，所述通过热压转印工艺，将覆盖有所述功能膜的第一层所述热塑性保护膜转印至超薄玻璃层的第一个所述主表面上的步骤之前，包括：对第一层所述热塑性保护膜和所述功能膜进行切割，使第一层所述热塑性保护膜、所述功能膜与所述超薄玻璃层的形状相同，大小相等。
在一些实施例中，所述在基层上形成热塑性保护膜的步骤，包括：在第二基层上形成第二层所述热塑性保护膜。
所述通过热压转印工艺，将所述热塑性保护膜转印至超薄玻璃层的至少一个主表面上的步骤，包括：通过热压转印工艺，将第二层所述热塑性保护膜转印至所述超薄玻璃层的第二个所述主表面上。
在一些实施例中，所述在第二基层上形成第二层所述热塑性保护膜的步骤，包括：在第二承载层上涂覆热塑性材料，固化形成第二热塑性保护层；切割所述第二承载层和所述第二热塑性保护层，形成第二叠层结构，所述第二叠层结构包括第二基层和第二层所述热塑性保护膜。
在一些实施例中，所述在第二基层上形成第二层所述热塑性保护膜的步骤之后，包括：在所述第二层所述热塑性保护膜背离第二基层的表面上形成第二临时保护膜。
所述通过热压转印工艺，将第二层所述热塑性保护膜转印至所述超薄玻璃层的第二个所述主表面上的步骤，包括：去除所述第二基层；在设定温度和设定压力条件下，将第二层所述热塑性保护膜朝向所述第二基层的表面与超薄玻璃层的表面贴合；去除所述第二临时保护膜。
在一些实施例中，在所述去除所述第二基层的步骤之后，且第二层所述热塑性保护膜朝向所述第二基层的表面与超薄玻璃层的表面贴合的步骤之前，包括：对第二层所述热塑性保护膜朝向所述第二基层的表面进行处理，以引入酸性官能团。
在一些实施例中，所述通过热压转印工艺，将第二层所述热塑性保护膜 转印至所述超薄玻璃层的第二个所述主表面上的步骤之后，包括：对第二层所述热塑性保护膜进行切割，使第二层所述热塑性保护膜的边缘与所述超薄玻璃层的边缘平齐。
或者，所述通过热压转印工艺，将第二层所述热塑性保护膜转印至所述超薄玻璃层的第二个所述主表面上的步骤之前，包括：对第二层所述热塑性保护膜进行切割，使第二层所述热塑性保护膜与所述超薄玻璃层的形状相同，大小相等。
在一些实施例中，所述设定温度为40℃～200℃，所述设定压力为1Mpa～20Mpa。
附图说明
为了更清楚地说明本公开中的技术方案，下面将对本公开一些实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例的附图，对于本领域普通技术人员来讲，还可以根据这些附图获得其他的附图。此外，以下描述中的附图可以视作示意图，并非对本公开实施例所涉及的产品的实际尺寸、方法的实际流程、信号的实际时序等的限制。
图1为根据一些实施例的显示装置的结构图；
图2为根据一些实施例的显示装置的结构图；
图3为根据一些实施例的显示装置的结构图；
图4为根据一些实施例的显示面板的结构图；
图5为根据一些实施例的保护盖板的结构图；
图6为根据一些实施例的保护盖板的结构图；
图7为根据一些实施例的保护盖板的结构图；
图8为根据一些实施例的保护盖板的制作方法的流程图；
图9为根据一些实施例的保护盖板的制作方法的步骤图；
图10为根据一些实施例的显示装置的结构图；
图11为根据一些实施例的保护盖板的制作方法的流程图；
图12为根据一些实施例的保护盖板的制作方法的流程图；
图13为根据一些实施例的保护盖板的制作方法的步骤图；
图14为根据一些实施例的保护盖板的制作方法的步骤图；
图15为根据一些实施例的保护盖板的结构图；
图16为根据一些实施例的保护盖板的制作方法的流程图；
图17为根据一些实施例的保护盖板的制作方法的流程图；
图18为根据一些实施例的保护盖板的制作方法的步骤图；
图19为根据一些实施例的保护盖板的制作方法的流程图；
图20为根据一些实施例的保护盖板的制作方法的流程图；
图21为根据一些实施例的保护盖板的制作方法的步骤图；
图22A为根据一些实施例的保护盖板的制作方法的流程图；
图22B为根据一些实施例的保护盖板的制作方法的流程图；
图23为根据一些实施例的保护盖板的制作方法的步骤图；
图24为根据一些实施例的保护盖板的制作方法的步骤图；
图25为根据一些实施例的保护盖板的制作方法的步骤图；
图26为根据一些实施例的保护盖板的制作方法的步骤图；
图27为根据一些实施例的保护盖板的结构图；
图28为根据一些实施例的保护盖板的制作方法的流程图；
图29为根据一些实施例的保护盖板的制作方法的步骤图；
图30为根据一些实施例的保护盖板的制作方法的流程图；
图31为根据一些实施例的保护盖板的制作方法的步骤图；
图32为根据一些实施例的保护盖板的制作方法的流程图；
图33为根据一些实施例的保护盖板的制作方法的步骤图；
图34A为根据一些实施例的保护盖板的制作方法的流程图；
图34B为根据一些实施例的保护盖板的制作方法的流程图；
图35为根据一些实施例的保护盖板的制作方法的步骤图；
图36为根据一些实施例的保护盖板的制作方法的步骤图；
图37为根据一些实施例的保护盖板的制作方法的步骤图。
具体实施方式
下面将结合附图，对本公开一些实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开所提供的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本公开保护的范围。
除非上下文另有要求，否则，在整个说明书和权利要求书中，术语“包括(comprise)”及其其他形式例如第三人称单数形式“包括(comprises)”和现在分词形式“包括(comprising)”被解释为开放、包含的意思，即为“包含，但不限于”。在说明书的描述中，术语“一些实施例(some embodiments)”、“示例(example)”、或“一些示例(some examples)”等旨在表明与该实施例或示例相关的特定特征、结构、材料或特性包括在本公开的至少一个实 施例或示例中。上述术语的示意性表示不一定是指同一实施例或示例。此外，所述的特定特征、结构、材料或特点可以以任何适当方式包括在任何一个或多个实施例或示例中。
以下，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本公开实施例的描述中，除非另有说明，“多个”的含义是两个或两个以上。
在描述一些实施例时，可能使用了“连接”及其衍伸的表达。例如，描述一些实施例时可能使用了术语“连接”以表明两个或两个以上部件彼此间有直接物理接触或电接触。这里所公开的实施例并不必然限制于本文内容。
“A、B和C中的至少一个”包括以下A、B和C的组合：仅A，仅B，仅C，A和B的组合，A和C的组合，B和C的组合，及A、B和C的组合。
“A和/或B”，包括以下三种组合：仅A，仅B，及A和B的组合。
如本文中所使用，根据上下文，术语“如果”任选地被解释为意思是“当……时”或“在……时”或“响应于确定”或“响应于检测到”。类似地，根据上下文，短语“如果确定……”或“如果检测到[所陈述的条件或事件]”任选地被解释为是指“在确定……时”或“响应于确定……”或“在检测到[所陈述的条件或事件]时”或“响应于检测到[所陈述的条件或事件]”。
另外，“基于”的使用意味着开放和包容性，因为“基于”一个或多个所述条件或值的过程、步骤、计算或其他动作在实践中可以基于额外条件或超出所述的值。
应当理解的是，当层或元件被称为在另一层或基板上时，可以是该层或元件直接在另一层或基板上，或者也可以是该层或元件与另一层或基板之间存在中间层。
本文参照作为理想化示例性附图的剖视图和/或平面图描述了示例性实施方式。在附图中，为了清楚，放大了层和区域的厚度。因此，可设想到由于例如制造技术和/或公差引起的相对于附图的形状的变动。因此，示例性实施方式不应解释为局限于本文示出的区域的形状，而是包括因例如制造而引起的形状偏差。例如，示为矩形的蚀刻区域通常将具有弯曲的特征。因此，附图中所示的区域本质上是示意性的，且它们的形状并非旨在示出设备的区域的实际形状，并且并非旨在限制示例性实施方式的范围。
本公开的一些实施例提供一种显示装置100，请参阅图1，本公开实施例涉及的显示装置100例如可以是：平板电脑、手机、电子阅读器、遥控器、 个人计算机(Personal Computer，简称PC)、笔记本电脑、个人数字助理(Personal Digital Assistant，简称PDA)、车载设备、网络电视、可穿戴设备、电视机等。
该显示装置100可以为液晶显示装置(Liquid Crystal Display，LCD)，该显示装置100也可以为自发光显示装置，例如，电致发光显示装置或光致发光显示装置。在该显示装置100为电致发光显示装置的情况下，该电致发光显示装置可以为有机发光二极管(Organic Light-Emitting Diode，OLED)显示装置或量子点发光二极管(Quantum Dot Light Emitting Diodes，QLED)显示装置。在该显示装置100为光致发光显示装置的情况下，该光致发光显示装置可以为量子点光致发光显示装置。本公开对于显示装置100的类型不进行限定。
请参阅图2和图3，显示装置100包括显示面板200和保护盖板300，其中，保护盖板300位于显示面板200的显示侧。
请参阅图2，在显示装置100可以为液晶显示装置的情况下，显示面板200为液晶显示面板200A。液晶显示面板200A的主要结构包括阵列基板21、对盒基板22以及设置在阵列基板21和对盒基板22之间的液晶层23。
阵列基板21的每个亚像素均包括位于第一衬底210上的薄膜晶体管211和像素电极212。薄膜晶体管211包括有源层、源极、漏极、栅极及栅绝缘层，源极和漏极分别与有源层接触，像素电极212与薄膜晶体管211的漏极电连接。在一些实施例中，阵列基板21还包括设置在第一衬底210上的公共电极213。像素电极212和公共电极213可以设置在同一层，在此情况下，像素电极212和公共电极213均为包括多个条状子电极的梳齿结构。像素电极212和公共电极213也可以设置在不同层，在此情况下，如图2所示，像素电极212和公共电极213之间设置有第一层间绝缘层214。在公共电极213设置在薄膜晶体管211和像素电极212之间的情况下，如图2所示，公共电极213与薄膜晶体管211之间还设置有第二层间绝缘层215。而在另一些实施例中，阵列基板21不包括公共电极213，此时，公共电极213可以位于对盒基板22中。
请参阅图2，阵列基板21还包括设置在薄膜晶体管211和像素电极212远离第一衬底210一侧的平坦层216。
请参阅图2，对盒基板22包括设置在第二衬底220上的彩色滤光层221，在此情况下，对盒基板22也可以称为彩膜基板(Color Filter，简称CF)。其中，彩色滤光层221至少包括红色光阻单元、绿色光阻单元以及蓝色光阻单 元，红色光阻单元、绿色光阻单元以及蓝色光阻单元分别与阵列基板21上的亚像素一一正对。对盒基板22还包括设置在第二衬底220上的黑矩阵图案222，黑矩阵图案222用于将红色光阻单元、绿色光阻单元以及蓝色光阻单元间隔开。
请参阅图2，液晶显示面板200A还包括设置在对盒基板22远离液晶层23一侧的上偏光片24以及设置在阵列基板21远离液晶层23一侧的下偏光片25。
请参阅图2，在显示面板200为液晶显示面板200A的情况下，保护盖板300位于上偏光片24背离液晶层23的一侧。
请参阅图3，在该显示装置100为电致发光显示装置的情况下，显示面板200为电致发光显示面板200B。此时，显示面板200为柔性显示面板。OLED显示面板具有轻薄、可绕性、色彩绚丽、对比度高、响应速率快等优势，是目前主流显示面板之一。
请参阅图3，电致发光显示面板200B可以包括显示用基板26和用于封装显示用基板26的封装层27。此处，封装层27可以为封装薄膜，也可以为封装基板。
请参阅图3，上述亚像素包括设置在第三衬底260上的驱动电路和发光器件，驱动电路包括多个薄膜晶体管211。发光器件包括阳极261、发光功能层262以及阴极263，阳极261和多个薄膜晶体管211中作为驱动晶体管的薄膜晶体管211的漏极电连接。电致发光显示面板200B还包括像素界定层264，像素界定层264包括多个开口区，发光功能层262设置在一个开口区中。在一些实施例中，发光功能层262包括发光层。在另一些实施例中，发光功能层262除包括发光层外，还包括电子传输层(Election Transporting Layer，简称ETL)、电子注入层(Election Injection Layer，简称EIL)、空穴传输层(Hole Transporting Layer，简称HTL)以及空穴注入层(Hole Injection Layer，简称HIL)中的一层或多层。
请参阅图3，电致发光显示面板200B还包括设置在驱动电路和阳极261之间的平坦层265。
在一些实施例中，请参阅图3，电致发光显示面板200B包括依次设置于第三衬底260上的有源膜层266、第一栅金属层Gate1、第二栅金属层Gate2、第一源漏金属层SD1和第二源漏金属层SD2。其中，有源膜层266和第一栅金属层Gate1用于形成驱动电路中的至少部分薄膜晶体管211。在有源膜层266和第一栅金属层Gate1用于形成驱动电路中的部分薄膜晶体管211的情况下， 有源膜层266和第二栅金属层Gate2可以用于形成驱动电路中的其余部分晶体管211，而第一栅金属层Gate1和第二栅金属层Gate2用于形成驱动电路中的电容。第一源漏金属层SD和第二源漏金属层SD2中包括多条向驱动电路传输信号的信号线，例如数据线、初始化信号线、电源信号线等，在此不一一列举。
在显示装置100为电致发光显示装置的情况下，保护盖板300位于封装层27背离第三衬底260的一侧。
请参阅图4，显示面板200中包括显示区AA和位于显示区AA至少一侧的周边区BB。在一些示例中，周边区BB绕显示区AA设置一周。显示区AA内设置有多个亚像素210(sub pixel)，多个亚像素210在显示区AA内按照指定规则排列于显示区AA内，其中，亚像素210是显示面板200内进行画面显示的最小单元，每个亚像素210可以显示单一的颜色，例如红色、绿色或蓝色，通过调节不同颜色的亚像素210的亮度，使得颜色组合和叠加可以实现多种颜色的显示。
以上对显示面板200进行了介绍，以下对保护盖板300进行介绍。
本公开的一些实施例提供了一种保护盖板300，请参阅图2和图3，保护盖板300可以位于显示面板200的显示侧。
请参阅图5和图6，保护盖板300包括超薄玻璃层310和至少一层热塑性保护膜320。其中，超薄玻璃层310具有相对的两个主表面311，至少一个主表面311上贴覆有热塑性保护膜320。
其中，在一些示例中，请参阅图5，超薄玻璃层310的一个主表面311上设置有热塑性保护膜320。在另一些实施例中，请参阅图6，超薄玻璃层310的两个主表面311上均设置有热塑性保护膜320。热塑性保护膜320具有热塑性，在加热的条件下，热塑性保护膜320具有粘性。
本公开的一些实施例所提供的保护盖板300，通过在超薄玻璃层310的至少一个主表面311上设置热塑性保护膜320，可以使得超薄玻璃层310的主表面具有良好的抗冲击效果，提高保护盖板300的抗冲击性能。
下面，对保护盖板的制作方法，进行举例说明。
本公开的一些实施例提供了一种保护盖板的制作方法，请参阅图8，保护盖板的制作方法包括以下步骤S1和S2。
S1、在基层400上形成热塑性保护膜320，请参阅图9。
示例性的，在步骤S1中，可以通过涂布工艺形成热塑性保护膜320。热塑性保护膜320在转印至超薄玻璃层310之前，热塑性保护膜320已经形成。
S2、通过热压转印工艺，将热塑性保护膜320转印至超薄玻璃层310的至少一个主表面311上。
其中，热塑性保护膜320具有热塑性，因此，在步骤S2中，在热压条件下，热塑性保护膜320具有粘性，因此，在热塑性保护膜320转印到超薄玻璃层310的主表面311上时，热塑性保护膜320可以与超薄玻璃层310粘合。
在一种实现方式中，保护盖板300包括超薄玻璃层310和位于超薄玻璃层310一侧的热固性保护膜，其中，热固定保护膜中包括热固性材料。此时，在制备保护盖板300的过程中，需要将热固性材料涂布在超薄玻璃层310上，而后对其进行干燥使其成膜。然而在热固性材料干燥成膜的过程中，会对超薄玻璃层310产生收缩力，容易造成超薄玻璃层310翘曲。而为了不让超薄玻璃层310翘曲，只能减小热固性材料的涂布厚度，这样便会导致热固定保护膜的厚度降低。然而热固定保护膜的厚度越低，保护盖板300的抗冲击能力越差，超薄玻璃层310越容易碎裂。
此外，保护盖板300大多为异形，因此，超薄玻璃层310多为异形，例如图7所示。在热固性材料涂布到CC区域时，由于CC区域没有超薄玻璃层310，此时热固性材料会喷涂在基台上，造成基台污染。
而本公开的一些实施例所提供的保护盖板300的制作方法中，热塑性保护膜320具有热塑性，且热塑性保护膜320通过热压转印工艺形成在超薄玻璃层310的表面上。
其中，热塑性保护膜320在转印之前已经形成，无需在超薄玻璃层310的表面涂布热塑性材料，且热塑性保护膜320转印在超薄玻璃层310之后，不容易引起超薄玻璃层310翘曲。
除此之外，由于热塑性保护膜320通过热压转印形成在超薄玻璃层310的主表面311上，不易引起超薄玻璃层310翘曲，因此，可以使得热塑性保护膜320具有较大的厚度，而热塑性保护膜320的厚度越大，抗冲击能力越好，因此，可以使得保护盖板300具有较好的抗冲击能力。
在一些实施例中，至少一层热塑性保护膜320的厚度大于或等于10μm。请参阅图5和图6，热塑性保护膜320的厚度为H1，H1≥10μm，可以保证保护盖板300具有良好的抗冲击效果。
在一些实施例中，主表面311中的至少部分表面为平面，平面包括多个边，平面的翘曲度小于或等于平面中最长边的十分之一。
在一些示例中，主表面311的部分表面为平面，剩余部分表面可以为曲面。
在另一些示例中，请参阅图7，主表面311的全部表面为平面，此时，主表面311包括多条边，多条边中包括第一条边3111和第二条边3112，第一条边3111的长度大于第二条边3112的长度。第一条边3111的长度为L1。其中，平面的翘曲度小于或等于0.1L1，即平面最大的翘曲高度小于或等于0.1L1。
因此，本公开一些实施例所提供的保护盖板300，在热塑性保护膜320的厚度较大的情况下，依旧可以使得保护盖板300的翘曲度为0，或者可以具有较小的翘曲度。因此，将保护盖板300设置于显示面板200时，可以使得保护盖板300与显示面板200之间更好的贴合，提高显示面板200的显示效果。
在一些实施例中，请参阅图10，第一个主表面311A上贴附有第一层热塑性保护膜320A。
其中，在超薄玻璃层310的第一个主表面311A贴附第一层热塑性保护膜320A，可以对超薄玻璃层310的第一个主表面311A进行保护。
在保护盖板300设置于显示面板200上时，可以使得超薄玻璃层310的第二个主表面311B朝向显示面板200，而第一个主表面311A背离显示面板200。此时，超薄玻璃层310的第一个主表面311A易受到冲击。因此，在超薄玻璃层310的第一个主表面311A贴附第一层热塑性保护膜320A，便可以使得保护盖板300具有较好的抗冲击能力。
基于此，在一些实施例中，请参阅图11，步骤S1、在基层400上形成热塑性保护膜320的步骤，包括：S11、在第一基层410上形成第一层热塑性保护膜320A。在步骤S11中，可以通过涂布工艺，在第一基层410上形成第一层热塑性保护膜320A。
请参阅图11，步骤S2、通过热压转印工艺，将热塑性保护膜320转印至超薄玻璃层310的至少一个主表面311上的步骤，包括：S21、通过热压转印工艺，将第一层热塑性保护膜320A转印至超薄玻璃层310的第一个主表面311A上。
其中，在将第一层热塑性保护膜320A转印至超薄玻璃层310的第一个主表面311A上之前，可以将第一基层410去除，进而使得第一层热塑性保护膜320A朝向第一基层410的表面与第一个主表面311A贴合。除此之外，还可以使得第一层热塑性保护膜320A背离第一基层410的表面与第一个主表面311A贴合，在转印之后，将第一基层410去除。
在一些实施例中，请参阅图12，S11、在第一基层410上形成第一层热塑性保护膜320A的步骤，包括：以下步骤S111和S112。
S111、在第一承载层411上涂覆热塑性材料，固化形成第一热塑性保护 层321A。
其中，可参阅图13，第一承载层411的面积较大，第一承载层411可以包括多个第一基层410。
在步骤S111中，可以在第一承载层411上涂布包括热塑性材料的溶液，而后进行干燥，将溶液中的溶剂蒸发，使得热塑性材料固化形成第一热塑性保护层321A。
在一些示例中，可以通过卷对卷的方式制备第一热塑性保护层321A。
其中，请参阅图13和图14，第一热塑性保护层321A可以被包括多个第一层热塑性保护膜320A。因此，在本公开的一些实施例中，可以通过一次涂布工艺形成多个第一层热塑性保护膜320A，无需为每个超薄玻璃层310单独制作一个第一层热塑性保护膜320A，因此，可以减少涂布工艺的次数，进而降低成本。
此外，第一承载层411可以设置为矩形，在第一承载层411进行涂布热塑性材料时，不会造成基台污染。
为了方便叙述，请参阅图13，可以将第一热塑性保护层321A和第一承载层411定义为初始叠层结构500。
S112、切割第一承载层411和第一热塑性保护层321A，形成第一叠层结构510，第一叠层结构510包括：第一基层410和第一层热塑性保护膜320A。
请参阅图13，初始叠层结构500可以被分割成多个第一叠层结构510。
在一些实施例中，请参阅图15，保护盖板300还包括：功能膜330，功能膜330位于第一层热塑性保护膜320A背离超薄玻璃层310的表面。
通过在第一层热塑性保护膜320A上设置功能膜330，可以使得保护盖板300具有其他功能。
在一些实施例中，请参阅图15，功能膜330的厚度H2为：0.1μm～20μm。
其中，功能膜330的厚度越大，其越不容易弯折。在本公开的一些示例中，0.1μm≤H2≤20μm，因此可以避免功能膜330的厚度H2过大(例如大于20μm)导致保护盖板300不易弯折。此外，还可以避免功能膜330的厚度H2过小(例如小于0.1μm)，导致功能膜不具有其所需的功能。
在一些示例中，功能膜330的厚度H2为：3μm～20μm
基于此，在一些实施例中，请参阅图16，步骤S11、在第一基层410上形成第一层热塑性保护膜320A的步骤之后，包括：S12、在第一层热塑性保护膜320A背离第一基层410的表面上形成功能膜330。
请参阅图16，步骤S21、通过热压转印工艺，将第一层热塑性保护膜320A 转印至超薄玻璃层310的第一个主表面311A上的步骤，包括：S22、通过热压转印工艺，将覆盖有功能膜330的第一层热塑性保护膜320A转印至超薄玻璃层310的第一个主表面311A上。
其中，在进行热压转印之前，功能膜330已经形成于第一层热塑性保护膜320A上。在一些示例中，可以通过涂布工艺形成功能膜330。
在步骤S22中，可以先将第一层热塑性保护膜320A上的第一基层410去除，进而使得第一层热塑性保护膜320A暴露，而后使得第一层热塑性保护膜320A朝向第一基层410的一侧贴附于超薄玻璃层310的第一个主表面311A上。
在一些实施例中，请参阅图17，S12、在第一层热塑性保护膜320A背离第一基层410的表面上形成功能膜330的步骤，包括：S121、在第一热塑性保护层321A背离第一承载层411的表面上涂覆功能材料，固化形成功能层331。
其中，请参阅图17，步骤S121可以在步骤S111之后完成。
在一些示例中，请参阅图18，在步骤S121中，可以通过涂布工艺形成功能层331。示例性的，将包括功能材料的溶液涂布在第一热塑性保护层321A背离第一承载层411的表面上。而后将溶液中的溶剂蒸发出去，以此使得功能材料固化形成功能层331。
此时，请参阅图18，初始叠层结构500中包括第一承载层411、第一热塑性保护层321A和功能层331。
请参阅图17，步骤S112、切割第一承载层411和第一热塑性保护层321A，形成第一叠层结构510的步骤，包括：S113、切割第一承载层411、第一热塑性保护层321A和功能层331，形成第一叠层结构510，第一叠层结构510包括：第一基层410、第一层热塑性保护膜320A和功能膜330。请参阅图18，初始叠层结构500可以被分割成多个第一叠层结构510。
在一些实施例中，功能膜330包括：硬化膜和/或防指纹膜。
在一些示例中，功能膜330可以仅包括硬化膜，硬化膜可以对第一层热塑性保护膜320A进行保护，避免在使用显示装置100的过程中，将第一层热塑性保护膜320A划伤。
在一些示例中，硬化膜的厚度为：0.1μm～20μm。
在一些示例中，硬化膜的厚度为：3μm～20μm。
基于此，在步骤S121中，涂布包括硬化材料的溶液涂布在第一热塑性保护层321A背离第一承载层411的表面上。而后将溶液中的溶剂蒸发出去，以 此使得硬化材料固化形成硬化层，此时，硬化层即为上述功能层331。
在一些示例中，硬化膜的材料包括涤纶树脂(PET)、聚甲基丙烯酸甲酯(PMMA)、三醋酸、纤维素酯(TAC)、聚环烯烃(COP)、聚酰亚胺(PI)中的至少一种。
在一些示例中，功能膜330可以仅包括防指纹膜，通过设置防指纹膜，可以减少显示装置100使用过程中，保护盖板300的表面所形成的指纹，进而提高用户的使用体验度。
在一些示例中，防指纹膜的厚度为：0.1μm～20μm。
在一些示例中，防指纹膜的厚度为：3μm～20μm。
在一些示例中，防指纹膜可以衍生自具有(甲基)丙烯酸基的多官能(甲基)丙烯酸酯聚合物、具有6-15个(甲基)丙烯酸基作为官能团的多官能氨基甲酸酯(甲基)丙烯酸酯低聚物、具有2-6个(甲基)丙烯酸基的多官能(甲基)丙烯酸酯单体和氟化(甲基)丙烯酸酯单体。(甲基)丙烯酸基是表示可以同时具有甲基丙烯酸酯基或丙烯酸酯基的表述。
基于此，在步骤S121中，涂布包括防指纹材料的溶液涂布在第一热塑性保护层321A背离第一承载层411的表面上。而后将溶液中的溶剂蒸发出去，以此使得防指纹材料固化形成防指纹层，此时，防指纹层即为上述功能层331。
在一些示例中，功能膜330包括：硬化膜和防指纹膜，此时，防指纹膜设置于硬化膜背离第一热塑性保护层321A的表面，以此使得功能膜330既能够保护第一层热塑性保护膜320A，还具有防指纹的功能。
基于此，请参阅图19，步骤S121、在第一热塑性保护层321A背离第一承载层411的表面上涂覆功能材料，固化形成功能层331的步骤，包括：以下步骤：S1211和S1212。
S1211、在第一热塑性保护层321A背离第一承载层411的表面上涂覆硬化材料，固化形成硬化层。
S1212、在硬化层背离第一热塑性保护层321A的表面上涂覆防指纹材料，固化形成防指纹层。
在另一些示例中，还可以在硬化膜中掺杂防止指纹材料，进而使得硬化膜既能够保护第一层热塑性保护膜320A，还具有防指纹的功能。
在一些实施例中，请参阅图20，步骤S12、在第一层热塑性保护膜320A背离第一基层410的表面上形成功能膜330的步骤之后，包括：S13、在功能膜330背离第一层热塑性保护膜320A的表面上形成第一临时保护膜610。
请参阅图21，在步骤S13中所形成的第一叠层结构510包括第一基层410、 第一层热塑性保护膜320A、功能膜330和第一临时保护膜610。
其中，第一临时保护膜610可以对功能膜330进行保护，以此能够避免功能膜330在第一层热塑性保护膜320A转印到超薄玻璃层310之前被划伤。
在一些示例中，请参阅图22A，S13、在功能膜330背离第一层热塑性保护膜320A的表面上形成第一临时保护膜610的步骤，包括：S131、在功能层331背离第一热塑性保护层321A的一侧贴附第一临时保护层611。
其中，步骤S131可以在步骤S121之后执行。
此时，请参阅图21，初始叠层结构500包括第一承载层411、第一热塑性保护层321A、功能层331和第一临时保护层611。
S113、切割第一承载层411、第一热塑性保护层321A和功能层331，形成第一叠层结构510的步骤，还包括：S114、切割第一承载层411、第一热塑性保护层321A、功能层331和第一临时保护层611，形成第一叠层结构510。此时，形成的第一叠层结构510如图23所示，第一叠层结构510包括第一基层410、第一层热塑性保护膜320A、功能膜330和第一临时保护膜610。
步骤S114在步骤S131之后执行。
请参阅图20和图22A，步骤S22、通过热压转印工艺，将覆盖有功能膜330的第一层热塑性保护膜320A转印至超薄玻璃层310的第一个主表面311A上的步骤，包括：以下步骤S221～S224。
S221、去除第一基层410，请参阅图24。此时，第一层热塑性保护膜320A背离功能膜330的表面暴露。
在一些实施例中，在S221、去除第一基层410的步骤之后，包括：S222、对第一层热塑性保护膜320A朝向第一基层410的表面进行处理，以引入酸性官能团。
在步骤S222中，可以通过酸洗、等离子处理等工艺对第一层热塑性保护膜320A的表面进行处理，进而使得第一层热塑性保护膜320A表面的酸性官能团(例如-COOH，-C 2H 2O 4等)增多。
S223、在设定温度和设定压力条件下，将第一层热塑性保护膜320A朝向第一基层410的表面与超薄玻璃层310的第一个主表面311A贴合。
其中，步骤S222在步骤233、将第一层热塑性保护膜320A朝向第一基层410的表面与超薄玻璃层310的第一个主表面311A贴合之前。
请参阅图25，在步骤S223中，第一层热塑性保护膜320A背离功能膜330的表面与第一个主表面311A贴合。
此外，超薄玻璃层310的表面具有丰富的悬链-OH结构，在步骤S223中， 在热压条件下，悬链-OH结构可以与酸性官能团发生脂基交换反应，即悬链-OH结构与酸性官能团结合，进而能够增加超薄玻璃层310与第一层热塑性保护膜320A之间的结合力，增加超薄玻璃层310与第一层热塑性保护膜320A之间的粘接效果。
除此之外，超薄玻璃层310中还具有二氧化硅(SiO2)，第一层热塑性保护膜320A中的高分子脂基与二氧化硅层间的偶极作用，也可增加超薄玻璃层310与第一层热塑性保护膜320A之间的结合力。
S224、去除第一临时保护膜610。在步骤S224中，去除第一临时保护膜610后，形成如图15所示的保护盖板300。
在一些实施例中，请参阅图22A，S22、通过热压转印工艺，将覆盖有功能膜330的第一层热塑性保护膜320A转印至超薄玻璃层310的第一个主表面311A上的步骤之后，包括：S231、对第一层热塑性保护膜320A和功能膜330进行切割，使第一层热塑性保护膜320A和功能膜330的边缘与超薄玻璃层310的边缘平齐。
请参阅图26，超薄玻璃层310通常为异形，而第一层热塑性保护膜320A与功能膜330所形成的叠层结构为矩形结构，将覆盖有功能膜330的第一层热塑性保护膜320A转印至超薄玻璃层310后，叠层结构的边缘位于超薄玻璃层310所在区域之外，在步骤S231对叠层结构进行切割，可以使得叠层结构的边缘与超薄玻璃层310的边缘平齐。
在一些示例中，步骤S224可以在步骤S231之前执行。在另一些示例中，步骤S224可以在步骤S231之后执行，此时，在步骤S231中，在对第一层热塑性保护膜320A进行切割的同时，还对第一临时保护膜610进行切割，切割之后，执行步骤S224，将第一临时保护膜610去除。
在其他的一些实施例中，请参阅图22B，S22、通过热压转印工艺，将覆盖有功能膜330的第一层热塑性保护膜320A转印至超薄玻璃层310的第一个主表面311A上的步骤之前，包括：S232、对第一层热塑性保护膜320A和功能膜330进行切割，使第一层热塑性保护膜320A、功能膜330与超薄玻璃层310的形状相同，大小相等。
在热压转印工艺之前，对第一层热塑性保护膜320A和功能膜330进行切割，以此使得在覆盖有功能膜330的第一层热塑性保护膜320A转印到超薄玻璃层310后，第一层热塑性保护膜320A和功能膜330的边缘可以与超薄玻璃层310的边缘平齐。
除了第一层热塑性保护膜320A之外，在一些实施例中，请参阅图27， 超薄玻璃层310的第二个主表面311B上贴附有第二层热塑性保护膜320B。
其中，超薄玻璃层310的第一个主表面311A与第二个主表面311B上均设置有热塑性保护膜320，可以进一步提高保护盖板300的抗冲击效果，避免超薄玻璃层310碎裂。
基于此，在一些实施例中，请参阅图28和图29，S1、在基层400上形成热塑性保护膜320的步骤，包括：S14、在第二基层420上形成第二层热塑性保护膜320B。
在步骤S14中，可以通过涂布工艺，在第二基层420上形成第二层热塑性保护膜320B。
请参阅图28，步骤S2、通过热压转印工艺，将热塑性保护膜320转印至超薄玻璃层310的至少一个主表面311上的步骤，包括：S24、通过热压转印工艺，将第二层热塑性保护膜320B转印至超薄玻璃层310的第二个主表面311B上。
在热压条件下，第二层热塑性保护膜320B具有粘性，以此与超薄玻璃层310粘接。
在一些实施例中，请参阅图30，S14、在第二基层420上形成第二层热塑性保护膜320B的步骤，包括：以下步骤S141和S142。
S141、在第二承载层421上涂覆热塑性材料，固化形成第二热塑性保护层321B。
其中，可参阅图31，第二承载层421的面积较大，第二承载层421可以包括多个第二基层420。
在步骤S141中，可以在第二承载层421上涂布包括热塑性材料的溶液，而后进行干燥，将溶液中的溶剂蒸发，使得热塑性材料固化形成第二热塑性保护层321B。
第二热塑性保护层321B可以被包括多个第二层热塑性保护膜320B。因此，在本公开的一些实施例中，可以通过一次涂布工艺形成多个第二层热塑性保护膜320B，无需为每个超薄玻璃层310单独制作一个第二层热塑性保护膜320B，因此，可以减少涂布工艺的次数，进而降低成本。
S142、切割第二承载层421和第二热塑性保护层321B，形成第二叠层结构520，第二叠层结构520包括第二基层420和第二层热塑性保护膜320B。
在步骤S142中，请参阅图31，对第二承载层421和第二热塑性保护层321B进行切割，可以形成如图29所示的第二叠层结构520。
在一些实施例中，请参阅图32和图33，S14、在第二基层420上形成第 二层热塑性保护膜320B的步骤之后，包括：S15、在第二层热塑性保护膜320B背离第二基层420的表面上形成第二临时保护膜620。
请参阅图33，在步骤S15中所形成的第二叠层结构520包括第二基层420、第二层热塑性保护膜320B和第二临时保护膜620。
其中，第二临时保护膜620可以对第二层热塑性保护膜320B进行保护，以此能够避免第二层热塑性保护膜320B在第二层热塑性保护膜320B转印到超薄玻璃层310之前被划伤。
在一些示例中，请参阅图34A，S15、在第二层热塑性保护膜320B背离第二基层420的表面上形成第二临时保护膜620的步骤，包括：S151、第二热塑性保护层321B背离第二承载层421的一侧贴附第二临时保护层621，可参阅图35。
其中，步骤S151可以在步骤S141之后执行。
S142、切割第二承载层421和第二热塑性保护层321B，形成第二叠层结构520的步骤，包括：S143、切割第二承载层421、第二热塑性保护层321B和第二临时保护层621，形成第二叠层结构520。此时，第二叠层结构520包括：第二基层420、第二层热塑性保护膜320B和第二临时保护膜620。
在步骤S142中所形成的第二叠层结构520如图33所示。
请参阅图32，S24、通过热压转印工艺，将第二层热塑性保护膜320B转印至超薄玻璃层310的第二个主表面311B上的步骤，包括：以下步骤S241～S244。
S241、去除第二基层420。此时，请参阅图36，第二层热塑性保护膜320B背离第二临时保护膜620的表面暴露。
在一些实施例中，在S241、去除第二基层420的步骤之后，包括：S242、对第二层热塑性保护膜320B朝向第二基层420的表面进行处理，以引入酸性官能团。
其中，第二层热塑性保护膜320B朝向第二基层420的表面即为第二层热塑性保护膜320B背离第二临时保护膜620的表面。
在步骤S242中，可以通过酸洗、等离子处理等工艺对第二层热塑性保护膜320B的表面进行处理，进而使得第二层热塑性保护膜320B表面的酸性官能团(例如-COOH，-C 2H 2O 4等)增多。
S243、在设定温度和设定压力条件下，将第二层热塑性保护膜320B朝向第二基层420的表面与超薄玻璃层310的表面贴合。
其中，步骤S242在步骤S243将第二层热塑性保护膜320B朝向第二基层 420的表面与超薄玻璃层310的表面贴合之前执行。
请参阅图37，第二层热塑性保护膜320B背离第二临时保护膜620的表面与第二个主表面311B贴合。
超薄玻璃层310的表面具有丰富的悬链-OH结构，在步骤S243中，在热压条件下，悬链-OH结构可以与酸性官能团发生脂基交换反应，即悬链-OH结构与酸性官能团结合，进而能够增加超薄玻璃层310与第二层热塑性保护膜320B之间的结合力，增加超薄玻璃层310与第二层热塑性保护膜320B之间的粘接效果。
除此之外，超薄玻璃层310中还具有二氧化硅(SiO2)，第二层热塑性保护膜320B中的高分子脂基与二氧化硅层间的偶极作用，也可增加超薄玻璃层310与第二层热塑性保护膜320B之间的结合力。
S244、去除第二临时保护膜620。
在步骤S244中，去除第二临时保护膜620后，形成如图27所示的保护盖板300。
在一些实施例中，请参阅图34A，S24、通过热压转印工艺，将第二层热塑性保护膜320B转印至超薄玻璃层310的第二个主表面311B上的步骤之后，包括：S251、对第二层热塑性保护膜320B进行切割，使第二层热塑性保护膜320B的边缘与超薄玻璃层310的边缘平齐。
超薄玻璃层310通常为异形，而第二层热塑性保护膜320B在转印之前为矩形结构，将第二层热塑性保护膜320B转印至超薄玻璃层310后，第二层热塑性保护膜320B的边缘位于超薄玻璃层310所在区域之外，在步骤S251中对第二层热塑性保护膜320B进行切割，可以使得第二层热塑性保护膜320B的边缘与超薄玻璃层310的边缘平齐。
在一些示例中，步骤S244可以在步骤S251之前执行。在另一些示例中，步骤S244可以在步骤S251之后执行，此时，在步骤S251中，在对第二层热塑性保护膜320B进行切割的同时，还对第二临时保护膜620进行切割，切割之后，执行步骤S244，将第二临时保护膜620去除。
在其他的一些实施例中，请参阅图34B，S24、通过热压转印工艺，将第二层热塑性保护膜320B转印至超薄玻璃层310的第二个主表面311B上的步骤之前，包括：S252、对第二层热塑性保护膜320B进行切割，使第二层热塑性保护膜320B与超薄玻璃层310的形状相同，大小相等。
在热压转印之前，对第二层热塑性保护膜320B进行切割，以此使得第二层热塑性保护膜320B转印到超薄玻璃层310之后，第二层热塑性保护膜320B 的边缘可以与超薄玻璃层310的边缘平齐。
此外，在一些示例中，步骤S251中对第二层热塑性保护膜320B进行切割和步骤S231中对第一层热塑性保护膜320A和功能膜330进行切割，可以同时进行。
在一些实施例中，超薄玻璃层310的第一个主表面311A仅设置有第一层热塑性保护膜320A，而未设置有功能膜330，此时，第一层热塑性保护膜320A和第二热塑性保护层321B可以在一次工艺中形成。
基于此，保护盖板的制作方法包括：在承载层上涂布热塑性材料，并固化形成热塑性保护层。
在热塑性保护层背离承载层的一侧形成保护层。
切割承载层、热塑性保护层和保护层形成多个第三叠层结构；第三叠层结构包括基层、热塑性保护膜320和临时保护膜。其中，承载层可以包括多个基层，多个基层中包括第一基层410和第二基层420。多个保护层可以包括多个临时保护膜，多个临时保护膜中包括第一临时保护膜610和第二临时保护膜620。而热塑性保护层可以包括多个热塑性保护膜，其中，多个热塑性保护膜中包括第一层热塑性保护膜320A和第二层热塑性保护膜320B。此时，多个第三叠层结构中包括第一叠层结构510和第二叠层结构520，其中，第一叠层结构510包括第一基层410、第一层热塑性保护膜320A和第一临时保护膜610，而第二叠层结构520包括第二基层420、第二层热塑性保护膜320B和第二临时保护膜620。
通过热压转印工艺将第一层热塑性保护膜320A转印至超薄玻璃层310的第一个主表面311A上。在该步骤中，可以先将第一基层410去除，使得第一层热塑性保护膜320A朝向第一基层410的表面暴露，而后对第一层热塑性保护膜320A朝向第一基层410的表面进行处理，以增多第一层热塑性保护膜320A朝向第一基层410的表面的酸性官能团，而后在设定温度和设定压力下，将第一层热塑性保护膜320A转印至超薄玻璃层310的第一个主表面311A。之后，去除第一临时保护膜610。最后，对第一层热塑性保护膜320A进行切割以使得第一层热塑性保护膜320A的边缘与超薄玻璃层310的边缘平齐。
通过热压转印工艺将第二层热塑性保护膜320B转印至超薄玻璃层310的第二个主表面311B上。在该步骤中，可以先将第二基层420去除，使得第二层热塑性保护膜320B朝向第二基层420的表面暴露，而后对第二层热塑性保护膜320B朝向第二基层420的表面进行处理，以增多第二层热塑性保护膜320B朝向第二基层420的表面的酸性官能团，而后在设定温度和设定压力下， 将第二层热塑性保护膜320B转印至超薄玻璃层310的第二个主表面311B。之后，去除第二临时保护膜620。最后，对第二层热塑性保护膜320B进行切割以使得第二层热塑性保护膜320B的边缘与超薄玻璃层310的边缘平齐。
在一些示例中，可以同时切割第一层热塑性保护膜320A和第二层热塑性保护膜320B。
在一些实施例中，在热压转印工艺中，设定温度为40℃～200℃，设定压力为1Mpa～20Mpa。
其中，在温度为40℃～200℃，压力为1Mpa～20Mpa的条件下，将热塑性保护膜320转印至超薄玻璃层310上，可以使得热塑性保护膜320与超薄玻璃层310具有较强的结合力，保证保护盖板300具有良好的稳定性。
在一些实施例中，请参阅图5和图6，热塑性保护膜320的厚度H1为10μm～500μm。
其中，热塑性保护膜320包括第一层热塑性保护膜320A和/或第二层热塑性保护膜320B。
其中，10μm≤H1≤500μm，避免塑性保护膜320的厚度H1过大(例如大于500μm)，导致塑性保护膜320不易弯折。此外，还避免第一层热塑性保护膜320A的厚度H1过小(例如小于10μm)，导致保护盖板300的抗冲击能力较差。
在一些示例中，热塑性保护膜320的厚度H1为160μm～350μm。
在一些实施例中，热塑性保护膜320的杨氏弹性模量为：5Mpa～10Gpa。
其中，热塑性保护膜320的杨氏弹性模量越大，其抗冲击能力越强，且越不容易弯折。在本公开的一些实施例中，可以避免热塑性保护膜320的模量过大(例如大于10Gpa)，导致热塑性保护膜320不易弯折。此外，还避免了热塑性保护膜320的模量过小(例如小于5Mpa)，导致保护盖板300的抗冲击能力较差。
在一些实施例中，热塑性保护膜320的材料包括热塑性聚氨酯、聚酰胺、聚碳酸酯、聚甲基丙烯酸甲酯、聚氨酯、聚乙烯、涤纶树脂、透明聚酰亚胺中的至少一个。
在一些实施例中，请参阅图5和图6，超薄玻璃层310的厚度H3为：10μm～100μm。
其中，10μm≤H3≤100μm，以此避免超薄玻璃层310的厚度H3过大(例如大于100μm)，导致超薄玻璃层310不易弯折；还可以避免超薄玻璃层310的厚度H3过小(例如小于10μm)，导致超薄玻璃层310的强度较低。
本公开的一些实施例所提供的显示装置100包括以上任一实施例所提供的保护盖板300，因此，本公开一些实施例所提供的显示装置100具有以上任一实施例所提供的保护盖板300的全部有益效果，在此不进行赘述。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (26)

  1. 一种保护盖板，包括：
    超薄玻璃层，具有相对的两个主表面；
    至少一层热塑性保护膜；其中，至少一个主表面上贴覆有所述热塑性保护膜。
  2. 根据权利要求1所述的保护盖板，其中，
    至少一层所述热塑性保护膜的厚度大于或等于10μm。
  3. 根据权利要求1或2所述的保护盖板，其中，
    所述主表面中的至少部分表面为平面，所述平面包括多个边，所述平面的翘曲度小于或等于所述平面中最长边的十分之一。
  4. 根据权利要求1～3中任一项所述的保护盖板，其中，
    第一个所述主表面上贴附有第一层所述热塑性保护膜；
    所述保护盖板还包括：功能膜，位于第一层所述热塑性保护膜背离所述超薄玻璃层的表面。
  5. 根据权利要求4所述的保护盖板，其中，
    所述功能膜包括：硬化膜和/或防指纹膜。
  6. 根据权利要求4或5所述的保护盖板，其中，
    所述功能膜的厚度为：0.1μm～20μm。
  7. 根据权利要求1～6中任一项所述的保护盖板，其中，
    第二个所述主表面上贴附有第二层所述热塑性保护膜。
  8. 根据权利要求1～7中任一项所述的保护盖板，其中，
    所述热塑性保护膜的厚度为10μm～500μm。
  9. 根据权利要求1～8中任一项所述的保护盖板，其中，
    所述热塑性保护膜的杨氏弹性模量为：5Mpa～10Gpa。
  10. 根据权利要求1～9中任一项所述的保护盖板，其中，
    所述热塑性保护膜的材料包括热塑性聚氨酯、聚酰胺、聚碳酸酯、聚甲基丙烯酸甲酯、聚氨酯、聚乙烯、涤纶树脂、透明聚酰亚胺中的至少一个。
  11. 根据权利要求1～10中任一项所述的保护盖板，其中，
    所述超薄玻璃层的厚度为：10μm～100μm。
  12. 一种显示装置，包括：
    显示面板；
    如权利要求1～11中任一项所述的保护盖板，位于所述显示面板的显示侧。
  13. 一种保护盖板的制作方法，包括：
    在基层上形成热塑性保护膜；
    通过热压转印工艺，将所述热塑性保护膜转印至超薄玻璃层的至少一个主表面上。
  14. 根据权利要求13所述的保护盖板的制作方法，其中，
    所述在基层上形成热塑性保护膜的步骤，包括：
    在第一基层上形成第一层所述热塑性保护膜；
    所述通过热压转印工艺，将所述热塑性保护膜转印至超薄玻璃层的至少一个主表面上的步骤，包括：
    通过热压转印工艺，将第一层所述热塑性保护膜转印至所述超薄玻璃层的第一个所述主表面上。
  15. 根据权利要求14所述的保护盖板的制作方法，其中，
    所述在第一基层上形成第一层所述热塑性保护膜的步骤，包括：
    在第一承载层上涂覆热塑性材料，固化形成第一热塑性保护层；
    切割所述第一承载层和所述第一热塑性保护层，形成第一叠层结构，所述第一叠层结构包括：所述第一基层和第一层所述热塑性保护膜。
  16. 根据权利要求14或15所述的保护盖板的制作方法，其中，
    所述在第一基层上形成第一层所述热塑性保护膜的步骤之后，包括：
    在第一层所述热塑性保护膜背离所述第一基层的表面上形成功能膜；
    所述通过热压转印工艺，将第一层所述热塑性保护膜转印至所述超薄玻璃层的第一个所述主表面上的步骤，包括：
    通过热压转印工艺，将覆盖有所述功能膜的第一层所述热塑性保护膜转印至所述超薄玻璃层的第一个所述主表面上。
  17. 根据权利要求16所述的保护盖板的制作方法，其中，
    所述在第一层所述热塑性保护膜背离所述第一基层的表面上形成功能膜的步骤，包括：
    在所述第一热塑性保护层背离所述第一承载层的表面上涂覆功能材料，固化形成功能层；
    所述切割所述第一承载层和所述第一热塑性保护层，形成第一叠层结构的步骤，包括：
    切割所述第一承载层、所述第一热塑性保护层和所述功能层，形成第一叠层结构，所述第一叠层结构包括：所述第一基层、第一层所述热塑性保护膜和所述功能膜。
  18. 根据权利要求16或17所述的保护盖板的制作方法，其中，
    所述在第一层所述热塑性保护膜背离所述第一基层的表面上形成功能膜的步骤之后，包括：
    在所述功能膜背离第一层所述热塑性保护膜的表面上形成第一临时保护膜；
    所述通过热压转印工艺，将覆盖有所述功能膜的第一层所述热塑性保护膜转印至超薄玻璃层的第一个所述主表面上的步骤，包括：
    去除所述第一基层；
    在设定温度和设定压力条件下，将第一层所述热塑性保护膜朝向所述第一基层的表面与所述超薄玻璃层的第一个所述主表面贴合；
    去除所述第一临时保护膜。
  19. 根据权利要求18所述的保护盖板的制作方法，其中，
    在所述去除所述第一基层的步骤之后，且第一层所述热塑性保护膜朝向所述第一基层的表面与超薄玻璃层的第一个所述主表面贴合的步骤之前，包括：
    对第一层所述热塑性保护膜朝向所述第一基层的表面进行处理，以引入酸性官能团。
  20. 根据权利要求18或19所述的保护盖板的制作方法，其中，
    所述通过热压转印工艺，将覆盖有所述功能膜的第一层所述热塑性保护膜转印至超薄玻璃层的第一个所述主表面上的步骤之后，包括：
    对第一层所述热塑性保护膜和所述功能膜进行切割，使第一层所述热塑性保护膜和所述功能膜的边缘与所述超薄玻璃层的边缘平齐；
    或者，所述通过热压转印工艺，将覆盖有所述功能膜的第一层所述热塑性保护膜转印至超薄玻璃层的第一个所述主表面上的步骤之前，包括：
    对第一层所述热塑性保护膜和所述功能膜进行切割，使第一层所述热塑性保护膜、所述功能膜与所述超薄玻璃层的形状相同，大小相等。
  21. 根据权利要求13所述的保护盖板的制作方法，其中，
    所述在基层上形成热塑性保护膜的步骤，包括：
    在第二基层上形成第二层所述热塑性保护膜；
    所述通过热压转印工艺，将所述热塑性保护膜转印至超薄玻璃层的至少一个主表面上的步骤，包括：
    通过热压转印工艺，将第二层所述热塑性保护膜转印至所述超薄玻璃层的第二个所述主表面上。
  22. 根据权利要求21所述的保护盖板的制作方法，其中，
    所述在第二基层上形成第二层所述热塑性保护膜的步骤，包括：
    在第二承载层上涂覆热塑性材料，固化形成第二热塑性保护层；
    切割所述第二承载层和所述第二热塑性保护层，形成第二叠层结构，所述第二叠层结构包括第二基层和第二层所述热塑性保护膜。
  23. 根据权利要求21或22所述的保护盖板的制作方法，其中，
    所述在第二基层上形成第二层所述热塑性保护膜的步骤之后，包括：
    在所述第二层所述热塑性保护膜背离第二基层的表面上形成第二临时保护膜；
    所述通过热压转印工艺，将第二层所述热塑性保护膜转印至所述超薄玻璃层的第二个所述主表面上的步骤，包括：
    去除所述第二基层；
    在设定温度和设定压力条件下，将第二层所述热塑性保护膜朝向所述第二基层的表面与超薄玻璃层的表面贴合；
    去除所述第二临时保护膜。
  24. 根据权利要求23所述的保护盖板的制作方法，其中，
    在所述去除所述第二基层的步骤之后，且第二层所述热塑性保护膜朝向所述第二基层的表面与超薄玻璃层的表面贴合的步骤之前，包括：
    对第二层所述热塑性保护膜朝向所述第二基层的表面进行处理，以引入酸性官能团。
  25. 根据权利要求23或24所述的保护盖板的制作方法，其中，
    所述通过热压转印工艺，将第二层所述热塑性保护膜转印至所述超薄玻璃层的第二个所述主表面上的步骤之后，包括：
    对第二层所述热塑性保护膜进行切割，使第二层所述热塑性保护膜的边缘与所述超薄玻璃层的边缘平齐；
    或者，所述通过热压转印工艺，将第二层所述热塑性保护膜转印至所述超薄玻璃层的第二个所述主表面上的步骤之前，包括：
    对第二层所述热塑性保护膜进行切割，使第二层所述热塑性保护膜与所述超薄玻璃层的形状相同，大小相等。
  26. 根据权利要求18或23所述的保护盖板的制作方法，其中，
    所述设定温度为40℃～200℃，所述设定压力为1Mpa～20Mpa。
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