Method for manufacturing folding cover plate, folding cover plate, display module and electronic device

Abstract

The application discloses a manufacturing method of a folding cover plate, the folding cover plate, a display module and an electronic device. The manufacturing method of the folding cover plate comprises the following steps: providing bendable glass; coating a first coating layer on the bendable glass and curing the first coating layer; coating a second coating layer on the surface of the first coating layer away from the bendable glass and curing the second coating layer, and the modulus of the second coating layer is higher than that of the first coating layer. The folding cover plate is manufactured by the manufacturing method, the manufacturing method adopts the method of coating the first coating layer and the second coating layer on the bendable glass, and the modulus of the second coating layer is higher than that of the first film layer, so that the folding cover plate forms a better impact-resistant layer, greatly relieves the stress received, improves the impact resistance of the glass, and also guarantees the material properties of the glass, and brings a better glass experience.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic devices, in particular to a manufacturing method of a folding cover plate, a folding cover plate, a display module and an electronic device. BACKGROUND

[0002] With the gradual maturity of flexible display screen technology, the display mode of terminal devices has changed. The mainstream foldable flexible screen mobile phones on the market use a cover plate of UTG (Ultra Thin Glass). However, the thickness of the current UTG is generally 30 um, similar to the thickness of paper. Although the UTG has good hardness, it is not resistant to impact. When subjected to strong impact, it is easy to break. At the same time, the UTG is too thin, and the overall glass texture is poor, resulting in poor user experience. SUMMARY

[0003] The present application provides a manufacturing method of a folding cover plate, a folding cover plate, a display module and an electronic device.

[0004] The manufacturing method of the folding cover plate of the present application embodiment comprises:

[0005] providing a bendable glass;

[0006] coating a first coating layer on the bendable glass and curing the first coating layer;

[0007] coating a second coating layer on the surface of the first coating layer away from the bendable glass and curing the second coating layer, the modulus of the second coating layer being higher than the modulus of the first coating layer.

[0008] The folding cover plate of the present application embodiment comprises a bendable glass, a first coating layer and a second coating layer, the first coating layer is coated on the bendable glass; the second coating layer is coated on the surface of the first coating layer away from the bendable glass, and the modulus of the second coating layer is higher than the modulus of the first coating layer.

[0009] The folding cover plate of the present application embodiment is manufactured by the manufacturing method, which coats a first coating layer and a second coating layer on the bendable glass, and the modulus of the second coating layer is higher than that of the first film layer, so that the folding cover plate forms a good impact-resistant layer, greatly relieves the stress received, improves the impact resistance of the glass, and also protects the properties of the glass material, bringing a better glass experience.

[0010] The display module of the present application embodiment adopts the folding cover plate to improve the impact resistance of the display module, thereby better protecting the display module.

[0011] The display module of the present application embodiment comprises the folding cover plate of any one of the above embodiments.

[0012] The display module of the embodiment of the present application adopts the folding cover plate to improve the impact resistance of the display module, thereby better protecting the display module.

[0013] The electronic device of the embodiment of the present application comprises the display module of the above-mentioned embodiment.

[0014] The electronic device of the embodiment of the present application is provided with the display module to improve the overall impact resistance of the electronic device.

[0015] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the references to the figures, in which:

[0017] Figure 1 is a flowchart of the control method of the folding cover plate of the embodiment of the present application;

[0018] Figure 2 is a structural diagram of the bendable glass of the embodiment of the present application;

[0019] Figure 3 is a structural diagram of the folding cover plate of the embodiment of the present application;

[0020] Figure 4 is a flowchart of the control method of the folding cover plate of the embodiment of the present application;

[0021] Figure 5 is a flowchart of the control method of the folding cover plate of the embodiment of the present application;

[0022] Figure 6 is a structural diagram of the display module of the embodiment of the present application;

[0023] Figure 7 is a structural diagram of the electronic device of the embodiment of the present application.

[0024] Explanation of main element symbols:

[0025] Electronic device 1000, display module 100, folding cover plate 10, bendable glass 11, bending area 111, non-bending area 112, groove 113, first coating layer 12, second coating layer 13, base layer 14, adhesive 15, display panel 20, shell 200. DETAILED DESCRIPTION

[0026] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein like or similar elements are denoted by the same or similar reference signs throughout the drawings. The embodiments described below are exemplary only, and are not intended to limit the present application.

[0027] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplification, the elements of the particular examples in the following description are described and illustrated in a particular arrangement and order. Of course, these are merely examples, and other arrangements, and / or orders can be possible, and the present application should not be construed as limited to the particular examples presented herein. Additionally, the present application can refer to a number of different embodiments and / or examples throughout the following disclosure. Such references are simply intended to serve as examples of the same or similar elements or features in the various embodiments and / or examples unless otherwise indicated.

[0028] Referring to Figure 1 The manufacturing method of the folding cover plate 10 of the embodiments of the present application comprises:

[0029] S10: providing a bendable glass 11;

[0030] S20: coating a first coating layer 12 on the bendable glass 11 and curing the first coating layer 12;

[0031] S30: coating a second coating layer 13 on the surface of the first coating layer 12 away from the bendable glass 11 and curing the second coating layer 13, the modulus of the second coating layer 13 being higher than that of the first coating layer 12.

[0032] Referring to Figure 2 and Figure 3 The folding cover plate 10 of the embodiments of the present application comprises a bendable glass 11, a first coating layer 12 and a second coating layer 13, the first coating layer 12 being coated on the bendable glass 11; the second coating layer 13 being coated on the surface of the first coating layer 12 away from the bendable glass 11, the modulus of the second coating layer 13 being higher than that of the first coating layer 12.

[0033] The folding cover plate 10 of the embodiments of the present application is manufactured by the manufacturing method, which coats the first coating layer 12 and the second coating layer 13 on the bendable glass 11, and the modulus of the second coating layer 13 is higher than that of the first coating layer, so that the folding cover plate 10 forms a better impact-resistant layer, greatly relieves the stress received, improves the impact resistance of the glass, and at the same time, guarantees the material properties of the glass, and brings a better glass experience.

[0034] In particular, the manufacturing method of the folding cover plate 10 can be applied to the ultra-thin non-uniform thickness bendable glass 11, and can also be used on a touch panel cover plate glass. The bendable glass 11 of the folding cover plate 10 can be a glass with a thickness of 100-200 microns. The bendable glass 11 can be bent. The first coating layer 12 can be coated on one side surface of the bendable glass 11 in the thickness direction (X). The first coating layer 12 can be made of a material that has good impact resistance, can well absorb and dissipate energy, and has good protection for the bendable glass 11. For example, the first coating layer 12 can be an acrylic pressure-sensitive OCR, silicone, polyurethane, etc.

[0035] The second coating layer 13 can be coated on the surface of the first coating layer 12 away from the bendable glass 11. The second coating layer 13 can have a hardness and modulus that can maintain the glass stiffness and cool touch properties of the bendable glass 11. For example, the second coating layer 13 can be a bendable epoxy type coating or a bendable epoxy film, a high modulus bendable acrylic ester material, etc.

[0036] The modulus of the second coating layer 13 can be higher than that of the first film layer. The modulus of the first coating layer 12 and the second coating layer 13 can be selected differently according to the ambient temperature.

[0037] When the folding cover plate 10 is manufactured by the manufacturing method, the bendable glass 11 can be provided first in step S10. The number of bendable glasses 11 can be one or more. The bendable glass 11 can be cleaned as a whole. Then, in step S20, the first coating layer 12 can be coated on the bendable glass 11 and cured. The coating method can be an inkjet printing process or a slot coating process to coat the first coating layer 12 on the surface of the bendable glass 11 that needs to be coated. The first coating layer 12 can be cured by using a solvent type material or a light curing material, which can be cured by temperature or light.

[0038] Then, in step S30, the second coating layer 13 can be coated on the surface of the first coating layer 12 away from the bendable glass 11 and cured. The coating method can be an inkjet printing process or a slot coating process to coat the second coating layer 13 on the surface of the first coating layer 12 away from the bendable glass 11. The second coating layer 13 can be a thermosetting coating that is cured at a certain temperature and for a certain time, or a UV type coating that is cured using an LED or Hg lamp.

[0039] The modulus of the second coating layer 13 can be higher than that of the first coating layer 12. The modulus can be the modulus of the material. The modulus of the material of the second coating layer 13 can be higher than that of the first coating layer 12.

[0040] Please refer to Figure 4In some embodiments, the bendable glass 11 includes a bending region 111 and a non-bending region 112 connected to the bending region 111, and the thickness of the non-bending region 112 is less than the thickness of the bending region 111.

[0041] The first coating 12 is coated on the bendable glass 11 and solidified (step S20), including:

[0042] S21: The first coating 12 is coated on the bending region 111 and the non-bending region 112, and the surface of the first coating 12 away from the bendable glass 11 is flat; and

[0043] Referring to Figure 2 and Figure 3 In some embodiments, the bendable glass 11 includes a bending region 111 and a non-bending region 112 connected to the bending region 111, and the thickness of the non-bending region 112 is less than the thickness of the bending region 111, the bending region 111 and the non-bending region 112 are coated with the first coating 12, and the surface of the first coating 12 away from the bendable glass 11 is a flat surface.

[0044] In this way, by using the method of coating the first coating 12 and solidifying the first coating 12 on the bending region 111 and the non-bending region 112 of the bendable glass 11, the uneven bending region 111 and the non-bending region 112 form a flat surface, thereby improving the impact resistance of the flat surface of the folding cover plate 10 and better protecting the folding cover plate 10.

[0045] Specifically, the non-bending region on the bendable glass 11 can be a middle region of the bendable glass 11, and the thickness of the non-bending region can be 30 microns or more. The bending region can be a region extending from the middle to both ends of the bendable glass 11 connecting the non-bending region. Wherein, along the thickness direction (X) of the bendable glass 11, the thickness H1 of the non-bending region 112 is less than the thickness H2 of the bending region 111.

[0046] The step S20 of coating the first coating 12 on the bendable glass 11 and solidifying the first coating 12 in the manufacturing method can be first coating the first coating 12 on the bending region 111 and the non-bending region 112 through step S21, and then solidifying the first coating 12 through step S22.

[0047] Referring to 5, in some embodiments, step S21 includes:

[0048] S211: The bending region 111 is formed with a groove 113, the first coating 12 is coated on the bending region 111 and the non-bending region 112, and the first coating 12 is filled into the groove 113;

[0049] S212: adjusting the first coating layer 12 to be flat away from the surface of the bendable glass 11.

[0050] Please refer to 2 and Figure 3 In some embodiments, the bendable area 111 is formed with a groove 113, and the first coating layer 12 fills the groove 113.

[0051] In this way, the groove 113 formed by the bendable area 111 can facilitate the bending of the bendable glass 11, and the coating of the first coating layer 12 on the bendable area 111 and the non-bendable area 112 can facilitate the flatness of the bendable glass 11 after coating and improve the impact resistance of the bendable glass 11; in addition, the coating layer is filled in the groove 113 with different thicknesses, which has high adhesion and thin thickness.

[0052] Specifically, the groove 113 of the bendable area 111 can be an area formed by the inward recess of one side surface of the bendable glass 11. The bendable area 111 connects the non-bendable area 112 to form the bendable glass 11. In the manufacturing method, step S21 can be implemented by first taking step S211, coating the first coating layer 12 on the bendable area 111 and the non-bendable area 112, and making the first coating layer 12 fill into the groove 113; and then taking step S212, adjusting the first coating layer 12 to be flat away from the surface of the bendable glass 11.

[0053] In some embodiments, curing the first coating layer 12 (step S22) comprises:

[0054] S221: irradiating the first coating layer 12 with ultraviolet rays to cure the first coating layer 12.

[0055] In this way, the first coating layer 12 is cured by ultraviolet irradiation, which has good process control.

[0056] Specifically, the first coating layer 12 can be made of UV curing material, and the viscosity can be 10-50 cps. The first coating layer 12 can be cured by ultraviolet lamp, which can be LED lamp with wavelength of 365 nm, or mercury lamp with pre-curing energy of 50-1000 mj / cm2, preferably 300-800 mj / cm2, and complete curing energy of 500-3000 mj / cm2.

[0057] In some embodiments, the second coating layer 13 is cured (step S30), comprising:

[0058] S31: baking the second coating layer 13 to cure the second coating layer 13; or

[0059] S32: irradiating the second coating layer 13 with ultraviolet rays to cure the second coating layer 13.

[0060] In this way, the second coating layer 13 is cured by baking or ultraviolet irradiation, and the curing process is controllable.

[0061] Specifically, the curing of the second coating layer 13 in step S30 can be performed by baking the second coating layer 13 in step S31 to cure the second coating layer 13. The baking temperature can be 80-100 degrees, and the baking time can be controlled within 5-10 minutes, so that the hardness of the material of the second coating layer 13 is controlled to be 3-4H, the modulus is controlled to be 5-23GPa, and preferably, the optimal modulus can be controlled to be 5-15GPa.

[0062] Alternatively, the second coating layer 13 can be cured by ultraviolet irradiation in step S32. The curing can be performed by using ultraviolet LED or mercury lamp, and the curing energy can be 500-2000mJ / cm2.

[0063] Please refer to FIG. 2 and Figure 3 In some embodiments, the width of the groove 113 gradually decreases in the thickness direction (X) of the bendable glass 11.

[0064] In this way, the gradually decreasing width of the groove 113 can prevent interference after the non-bendable area 112 of the bendable glass 11 is folded.

[0065] Specifically, along the thickness direction (X) of the bendable glass 11, the groove 113 of the non-bendable area gradually decreases into the bendable glass 11 along the thickness direction (X).

[0066] Please refer to FIG. 2 and Figure 3 In some embodiments, the material of the first coating layer 12 includes at least one of acrylic pressure-sensitive, silicone, and polyurethane; and the material of the second coating layer 13 includes at least one of epoxy-based material and acrylic ester-based material.

[0067] In this way, the material of the first coating layer 12 has good impact resistance and can well absorb and dissipate energy, and the material of the second coating layer 13 has the properties of maintaining the stiffness of the bendable glass 11 and the cool touch.

[0068] Specifically, the material of the first coating layer 12 can include at least one of acrylic pressure-sensitive, silicone, and polyurethane.

[0069] For example, the material of the first coating layer 12 can include low-modulus acrylic pressure-sensitive OCR, low-modulus silicone, and low-modulus polyurethane. The material of the second coating layer 13 can include at least one of epoxy-based material and acrylic ester-based material, for example, the material of the second coating layer 13 can include bendable epoxy coating or bendable epoxy film, and high-modulus bendable acrylic ester-based material.

[0070] Please refer toFigure 2 and Figure 3 In some embodiments, the modulus of the first coating layer 12 is in the range of 30-50 KPa at room temperature; and / or,

[0071] The modulus of the second coating layer 13 is in the range of 5-23 GPa at room temperature; and / or, the refractive index of the first coating layer 12 is in the range of 1.48-1.52; and / or, the refractive index of the second coating layer 13 is in the range of 1.48-1.52.

[0072] Thus, at room temperature, the first coating layer 12 has better performance in the modulus range of 30-50 KPa and the second coating layer 13 has better performance in the modulus range of 5-23 GPa. The difference in the refractive index range of the first coating layer 12 and the second coating layer 13 is not large, and it is not easy to produce light and shadow disorder.

[0073] Specifically, the bendable glass 11 is generally bent at room temperature, and the modulus of the first coating layer 12 can be selected to be 30-50 KPa. However, the bending requirements of the bendable glass 11 in different environments need to be considered, for example, it can also be used normally at -30°C in the northeast, and it can also be used in the extremely hot 65°C environment in Africa in summer, and the requirement for the modulus of the material will be extremely high. Therefore, the modulus of the first coating layer 12 at -30°C can be selected to be 200-300 KPa, the modulus of the first coating layer 12 at -20°C can be selected to be 60-180 KPa, the modulus of the first coating layer 12 at 65°C can be selected to be 15-30 KPa, and the modulus of the first coating layer 12 at 85°C can be selected to be 18-25 KPa.

[0074] Similarly, at room temperature, the modulus of the second coating layer 13 can be selected to be 25°C, and the modulus of the second coating layer 13 at -30°C can be selected to be 0.2-40 GPa. The modulus of the second coating layer 13 at -20°C can be selected to be 1-30 GPa, at room temperature, the modulus of the second coating layer 13 at 65°C can be selected to be 0.4-10 GPa.

[0075] Please refer to Figure 2 and Figure 3 In some embodiments, the folding cover plate 10 further comprises a base layer 14, and the base layer 14 is attached to the side of the bendable glass 11 away from the first coating layer 12.

[0076] Thus, the base layer 14 attached to the side of the bendable glass 11 away from the first coating layer 12 can improve the impact resistance of the bendable glass 11.

[0077] Specifically, the base layer 14 can be a substrate layer made of PET material, and the thickness of the PET can be 50 microns. The base layer 14 can be attached to the side of the bendable glass 11 away from the first coating layer 12 by the adhesive 15. The adhesive 15 can be OCA (optical glue), and the thickness of the OCA (optical glue) can be 50 microns.

[0078] In summary, the folding cover plate 10 made by the manufacturing method can pass the single pen drop test and the single reliability test:

[0079] Single pen drop test:

[0080] The pen drop can use a common writing pen on the market, with a weight of 12.5g and a pen core diameter of 0.5mm. The structure obtained by the test can be as shown in the following table.

[0081]

[0082] From the above data, the bendable glass 11 coated with the first coating 12 and the second coating 13 has a great improvement in the pen drop test.

[0083] The single reliability test includes:

[0084] The reliability verification of the bendable glass 11 coated with the first coating 12 and the second coating 13 with a dynamic bending angle R = 2.0 can be shown in the following table:

[0085] Coating reliability verification Coating cracking condition -20℃ bending 100,000 times No cracking, no warping 25℃ bending 300,000 times No cracking, no warping 65℃ bending 200,000 times No cracking, no warping

[0086] The reliability verification of the static bending of the bendable glass 11 coated with the first coating 12 and the second coating 13 can be shown in the following table:

[0087]

[0088]

[0089] The reliability verification of the bendable glass 11 coated with the first coating 12 and the second coating 13 under the conditions of dynamic bending, 85℃ temperature, 85% RH, ultraviolet aging, water boiling hundred grid, steel wire 1kg load, artificial sweat, cosmetics, etc. can be shown in the following table:

[0090]

[0091] Please refer to 6, the display module 100 of the embodiment of the application includes the folding cover plate 10 of any of the above embodiments.

[0092] The display module 100 of the embodiment of the application uses the folding cover plate 10 to improve the impact resistance of the display module 100, thereby better protecting the display module 100.

[0093] Specifically, the folding cover plate 10 can be arranged on the display panel 20 and can be used to increase the strength of the display panel 20.

[0094] Please refer to 7, the electronic device 1000 of the embodiment of the application includes the display module 100 of the above embodiment.

[0095] The electronic device 1000 of the embodiments of the present application is provided with the display module 100, which can improve the overall impact resistance of the electronic device 1000.

[0096] Specifically, the electronic device 1000 includes, but is not limited to, a foldable mobile phone, a tablet computer, an electronic reader, an electronic photo album, a display screen, and the like. The display module 100 can be arranged in the housing 200 of the electronic device 1000.

[0097] In the description of the present specification, the description referring to the terms "one embodiment", "certain embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0098] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the present application, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for manufacturing a folding cover plate, characterized in that, include: Provide a bendable glass; Apply a first coating to the bendable glass and allow the first coating to cure. A second coating is applied to the surface of the first coating away from the bendable glass and the second coating is cured, wherein the modulus of the second coating is higher than that of the first coating; The modulus of the first coating is in the range of 30-50 kPa at room temperature; the modulus of the second coating is in the range of 5-23 GPa at room temperature; the refractive index of the first coating is in the range of 1.48-1.52; and the refractive index of the second coating is in the range of 1.48-1.

52.

2. The manufacturing method according to claim 1, characterized in that, The bendable glass includes a bendable region and a non-bendable region connected to the bendable region, wherein the thickness of the non-bendable region is less than the thickness of the bendable region; Applying a first coating to the bendable glass and curing the first coating includes: The first coating is applied to both the bending area and the non-bending area, and the first coating is made flat away from the surface of the bendable glass. The first coating is cured.

3. The manufacturing method according to claim 2, characterized in that, The bending area has a groove. The first coating is applied to both the bending area and the non-bending area, and the first coating is made to fill the groove. Adjust the first coating away from the surface of the bendable glass until it is flat.

4. The manufacturing method according to claim 2, characterized in that, The curing of the first coating includes: The first coating is cured by irradiating it with ultraviolet light.

5. The manufacturing method according to claim 1, characterized in that, The process of curing the second coating includes: The second coating is baked to cure it; or The second coating is cured by irradiating it with ultraviolet light.

6. A folding cover, characterized in that, include: Bendable glass; A first coating applied to the bendable glass; A second coating is applied to the surface of the first coating that is opposite to the bendable glass, the modulus of the second coating being higher than that of the first coating; The modulus of the first coating is in the range of 30-50 kPa at room temperature; the modulus of the second coating is in the range of 5-23 GPa at room temperature; the refractive index of the first coating is in the range of 1.48-1.52; and the refractive index of the second coating is in the range of 1.48-1.

52.

7. The folding cover plate according to claim 6, characterized in that, The bendable glass includes a bending area and a non-bending area connected to the bending area. The thickness of the non-bending area is less than the thickness of the bending area. Both the bending area and the non-bending area are coated with the first coating layer. The first coating layer is a flat surface away from the surface of the bendable glass.

8. The folding cover plate according to claim 7, characterized in that, The bending area has a groove, and the first coating fills the groove.

9. The folding cover plate according to claim 8, characterized in that, The width of the groove gradually decreases in the thickness direction of the bendable glass.

10. The folding cover plate according to claim 6, characterized in that, The material of the first coating includes at least one of acrylic pressure-sensitive material, silicone material, and polyurethane material; the material of the second coating includes at least one of epoxy material and acrylic ester material.

11. The folding cover plate according to claim 6, characterized in that, The folding cover also includes a base layer, which is adhered to the side of the bendable glass opposite to the first coating.

12. A display module, characterized in that, Includes the folding cover plate as described in any one of claims 6 to 11.

13. An electronic device, characterized in that, Includes the display module as described in claim 12.

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