protective film

Abstract

The utility model relates to a protective film, the protective film includes the main part, the main part has top surface and bottom surface, the bottom surface is used for with display screen and is pasted, top surface is equipped with etching texture, etching texture includes a plurality of polygonal pit, the etching texture of this protective film is constituted by a plurality of rules or half rules pit array, makes the uniform diffuse reflection when the outside light enters the protective film, and the optical performance is more uniform, thereby giving consideration to anti -dazzle effect and display definition.

Description

Technical Field

[0001] This utility model relates to the field of electronic product accessories, and in particular to a protective film for protecting the display screen of electronic products. Background Technology

[0002] Existing anti-glare tempered glass screen protectors have display problems: one type has good anti-glare effect but serious screen flickering when the screen is on and white when the screen is off; the other type has fewer flickering points but insufficient anti-glare, making it difficult to meet user needs. Utility Model Content

[0003] In view of this, the present invention provides a protective film to solve the problems of protective films in the prior art.

[0004] To achieve one, some, or all of the above objectives, or other objectives, this utility model proposes:

[0005] A protective film includes a body, the body having a top surface and a bottom surface, the bottom surface being for bonding with a display screen, and the top surface having an etched texture, the etched texture including multiple polygonal pits.

[0006] In some embodiments, the plurality of polygonal recesses are adjacent to each other, and the polygonal recesses include one or more of triangular recesses, quadrilateral recesses, pentagonal recesses, and hexagonal recesses.

[0007] In some embodiments, the body includes a planar portion and a bent portion, the bent portion being formed by bending the top surface of the body to the bottom surface and being disposed around the planar portion, and the etched texture being distributed on the planar portion and / or the bent portion.

[0008] In some embodiments, the circumcircle diameter of any of the polygonal recesses ranges from 0.1 to 1.5 micrometers.

[0009] In some embodiments, the depth of any of the polygonal pits in the thickness direction of the body ranges from 0.3 to 1 micrometer.

[0010] In some embodiments, the body includes a planar portion and a bent portion, the bent portion being formed by bending the top surface of the body to the bottom surface and being disposed around the planar portion.

[0011] In some embodiments, the main body further includes a cutting surface disposed on the bent portion, the cutting surface being a smooth inclined surface.

[0012] In some embodiments, the cutting surface is disposed on the top and / or bottom surface of the bend.

[0013] In some embodiments, the body further includes a screen printing layer disposed at the edge of the bottom surface of the bent portion, the screen printing layer at least covering the cutting surface.

[0014] In some embodiments, the screen printing layer at least covers the bent portion.

[0015] Implementing the embodiments of this utility model will have the following beneficial effects:

[0016] After adopting the above-mentioned protective film, the etched texture of the protective film is composed of multiple regular or semi-regular polygonal pits arranged adjacently, so that when external light enters the protective film, it produces uniform diffuse reflection, and the optical performance is more uniform, thus taking into account both anti-glare effect and display clarity. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram illustrating the separation of the protective film from the display screen in some embodiments, showing the AB adhesive separating from the main body;

[0019] Figure 2 Schematic diagram of the main body structure in some embodiments Figure 1 The top surface of the main body is shown therein;

[0020] Figure 3 Schematic diagram of the main body structure in some embodiments Figure 2 The bottom surface of the main body is shown therein;

[0021] Figure 4 This is a schematic diagram of a partial distribution of the etched texture in some embodiments, showing polygonal pits;

[0022] Figure 5 This is a partial cross-sectional view of the main body in some embodiments;

[0023] Figure 6 This is a schematic diagram of the preparation process of the protective film in some embodiments;

[0024] Figure 7 This is a schematic diagram of the main body in another embodiment;

[0025] in:

[0026] 1-Main body; 10-Top surface; 11-Bottom surface; 12-Flat surface; 13-Bent section; 14-Cutting surface; 15-Silk screen layer;

[0027] 2-Etched texture; 20-Polygonal pits;

[0028] 3-Transparent adhesive layer;

[0029] 4- Display screen. Detailed Implementation

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order.

[0031] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0033] See appendix Figure 1 -Appendix Figure 7 An embodiment of this utility model provides a protective film, which includes a main body 1. The main body 1 includes a top surface 10 and a bottom surface 11. The bottom surface 11 is used to adhere to the display screen 4, and the top surface 10 is provided with an etched texture 2.

[0034] Specifically, this protective film is mainly used on the display screen 4 of electronic products such as mobile phones, tablets, smartwatches, and automotive display devices. The display screen 4 can be in the form of a flat screen, a screen with a slightly curved edge, or a curved screen. The protective film is mainly composed of a transparent glass substrate, which serves as the main body 1, giving it a top surface 10 and a bottom surface 11. A transparent adhesive layer 3 (such as AB glue) can be provided on the bottom surface 11 to allow the main body 1 to adhere tightly to the display surface of the display screen 4. An etched texture 2 is provided on the top surface 10 of the main body 1. The etched texture 2 is formed using chemical etching and laser technology, resulting in multiple pits with clear boundaries and stable shapes. Specifically, a protective layer is first provided on the main body 1 (to prevent chemical etching). The protective layer is etched with a laser process to create the desired etch texture 2, exposing the glass substrate that forms the main body 1. Then, a chemical etching process is used to etch the exposed glass substrate surface, thus forming the final etch texture 2. Therefore, the etch texture 2 is formed by laser process to carve out the outer contour of multiple polygonal pits 20, and then by chemical etching to form multiple polygonal pits 20, ultimately forming an etch texture 2 composed of multiple polygonal pits 20. Compared with the irregular holes formed by traditional chemical etching, the etch texture 2 of this protective film is formed by multiple regular or semi-regular polygonal pits 20 arranged adjacently, so that when external light enters the protective film, it produces uniform diffuse reflection, and the optical performance is more uniform, thus taking into account both anti-glare effect and display clarity.

[0035] Reference Figure 4 In some embodiments, the etched texture 2 includes multiple polygonal pits 20. Specifically, the multiple polygonal pits 20 are closely adjacent to each other, and the multiple polygonal pits 20 are irregularly distributed. When the polygonal pits 20 are hexagonal pits, their close splicing can form a honeycomb-like structure. It should also be noted that the multiple polygonal pits 20 of the etched texture 2 may also include one or more combinations of triangular pits, quadrilateral pits, pentagonal pits, and hexagonal pits.

[0036] In some embodiments, the circumcircle diameter of any polygonal recess 20 ranges from 0.1 to 1.5 micrometers. Specifically, among the multiple polygonal recesses 20, the circumcircle diameter of the smallest polygonal recess 20 is not less than 0.1 micrometers, and the circumcircle diameter of the largest polygonal recess 20 is not greater than 1.5 micrometers. The lower limit of the aforementioned diameter is greater than the diffraction critical value of 4 pixels on the display screen, which can prevent the recess from being too small, resulting in insufficient light absorption and thus an insignificant anti-glare effect. The upper limit of the aforementioned diameter is less than the critical value of pixel pitch, which can prevent the recess from being too large, resulting in excessive local scattering, producing bright spots, or reducing display clarity. By controlling the diameter of the polygonal recess 20 within this range, the scattering effect and display resolution can be balanced.

[0037] In some embodiments, the depth of any polygonal recess 20 in the thickness direction of the body 1 ranges from 0.3 to 1 micrometer. Specifically, when the depth of the polygonal recess 20 is too shallow, i.e., less than 0.3 micrometers, the recess depth is insufficient to significantly change the incident light path, and most of the light passes through directly, making it difficult to form effective diffuse scattering, resulting in insufficient anti-glare performance. When the depth of the polygonal recess 20 is too large, i.e., greater than 1 micrometer, the scattering angle is too large, the haze value increases significantly, the brightness of the display screen 4 decreases, and it appears white or grayish when the screen is off. By controlling the depth of the polygonal recess 20 within the above range, moderate diffuse scattering can be achieved while ensuring light transmittance, thereby achieving a balance between anti-glare and display clarity. In addition, this depth range also matches the controllability of the laser etching process, avoiding boundary collapse or excessive roughness caused by excessive processing.

[0038] It should also be noted that the geometric dimensions of the polygonal recess 20 are not limited to the numerical ranges mentioned above. For example, for high-resolution micro-display devices, the diameter and depth parameters can be appropriately reduced; for low-resolution large-screen display devices, the size range can be appropriately widened to enhance the scattering effect. These are all optional embodiments of this utility model.

[0039] Reference Figure 7 In some embodiments, the main body 1 is a planar portion 12, which is a plate-like structure with flat and smooth surfaces on both sides, used to fit the screen. In other embodiments, the main body 1 may consist only of the planar portion 12 to adapt to a flat-screen display device.

[0040] Reference Figure 2 and Figure 3 In some embodiments, the main body 1 includes a flat portion 12 and a bent portion 13. The bent portion 13 is formed by bending the top surface 10 of the main body 1 towards the bottom surface 11 and surrounds the flat portion 12. Specifically, the flat portion 12 is a double-sided, smooth, plate-like structure used to fit the main display area of ​​the screen. The flat portion 12 is located in the center of the main body 1, and the bent portion 13 surrounds the flat portion 12 to form a bent edge. The area of ​​the flat portion 12 is much larger than the area of ​​the bent portion 13. The flat portion 12 corresponds to the main display area of ​​the display screen 4. The bent portion 13 is formed by bending the main body 1 from the top surface 10 to the bottom surface 11, thereby enabling edge fitting with the display screen 4, which has an arc edge or curved surface structure. This ensures that the protective film not only tightly covers the display area but also smoothly connects at the screen edge transition, avoiding gaps or curling edges. It should also be noted that the bent portion 13 can be formed using a hot bending process.

[0041] In some embodiments, the etched texture 2 is distributed on the planar portion 12 and the bent portion 13, thereby enabling the anti-glare performance to cover the entire display area and the edge area.

[0042] In some embodiments, the etched texture 2 can be set to be distributed only on the planar portion 12. When the edge of the main body 1 is bent to form the bent portion 13, the etched texture 2 on the bent surface is deformed, resulting in uneven local scattering. When light is concentrated and reflected in certain areas, a phenomenon similar to "bright spots" or "flickering spots" will appear in the screen-on state. Therefore, by setting the etched texture 2 only on the planar portion 12, the phenomenon of flickering spots appearing in the bent portion 13 can be avoided, thus preventing optical defects.

[0043] As mentioned earlier, when the etched texture 2 extends to the bend 13, the etched texture 2 undergoes geometric deformation due to the curvature of the bend 13 during the hot bending process, resulting in optical defects. For example, the light scattering direction in local areas may shift, easily forming flashes when the screen is on; gloss difference lines may appear at the junction of the display area and the bezel area; and local whitening or abnormal haze may occur when the screen is off. These phenomena all affect display consistency and user experience. To address this, the main body 1 also includes a cutting surface 14 disposed on the bend 13. The cutting surface 14 is a smooth inclined surface formed after removing the etched texture 2. When light is incident on this smooth area, it will pass through by transmission or specular reflection, and will no longer be affected by uneven scattering caused by texture deformation, thus avoiding the generation of local flashes, eliminating gloss difference lines, and reducing the risk of whitening when the screen is off.

[0044] In some embodiments, the cutting surface 14 can be disposed on the top surface 10 of the bending portion 13 to adapt to the stress characteristics of the outer arc of the glass during hot bending; alternatively, the cutting surface 14 can be formed separately on the bottom surface 11 of the bending portion 13 to reduce interface non-uniformity when bonding the display screen 4. In other embodiments, the cutting surface 14 is disposed on both the top surface 10 and the bottom surface 11 of the bending portion 13 to achieve both stable hot bending and tight bonding.

[0045] Furthermore, the cutting surface 14 not only improves optical performance but also prevents the glass substrate 1 from cracking during hot bending. Because the stress concentration points of the etched texture 2 are removed, the bent portion 13 is less prone to cracking under heat or pressure, thereby improving the processing yield and reliability of the protective film.

[0046] Reference Figure 5 and Figure 6In some embodiments, the main body 1 further includes a screen printing layer 15, which is disposed on the bending portion 13. Specifically, the screen printing layer 15 is located in the bending portion 13 and its adjacent area, at least covering the cutting surface 14. Since the cutting surface 14 is a transparent and smooth area, if it is not covered, a difference in light transmission may occur between the flat portion 12 and the bending portion 13 at a certain angle. By forming a light-shielding layer in the bending portion 13 and its adjacent area, the screen printing layer 15 can effectively mask the cutting surface 14, thereby preventing the appearance of gloss difference lines on the display interface and ensuring the visual consistency of the display edges.

[0047] It should also be noted that the screen printing layer 15 is preferably formed of black optical ink with a thickness of 5 to 15 micrometers, which ensures both light-blocking effect and adhesion to the display screen 4. The area of ​​the screen printing layer 15 can be extended to the entire bending portion 13 as needed, so that the bent surface is no longer transparent, further improving the display quality. In addition, the screen printing layer 15 can also be set on the edge of the bottom surface 11 of the bending portion 13 of the main body 1. Since the top surface 10 of the protective film is the surface that the user directly contacts, if the screen printing layer 15 is formed on the top surface 10, it is easily damaged by friction, scratches or cleaning during daily operation, affecting the appearance and service life.

[0048] Reference Figure 6 The protective film of this utility model can be prepared by the following process:

[0049] S1 - Raw material preparation: Provide a glass sheet as the substrate of the main body 1, and set a protective layer on the top surface of the glass sheet. The glass substrate provides the material basis for subsequent processing to form the flat part 12 and the bent part 13.

[0050] S2-Nano Texture Processing: The outer contour of polygonal pits 20 is formed on the top surface of the glass substrate using laser etching process, and then etched into an etched texture 2 using chemical etching.

[0051] S3 - Cutting: Cut large-size glass into single pieces. At this time, the shape of the main body 1 is initially determined, forming the prototype of the planar part 12 of the protective film.

[0052] S4-CNC machining: Precision cutting of a single glass sheet to form the outer contour and 2.5D arc edge; during this process, the edge of the main body 1 is beveled, thereby pre-forming the cutting surface 14 at the bending part 13.

[0053] S5 - Screen Printing Protective Oil: Forms a protective layer in non-processed areas to maintain the integrity of the planar portion 12 and texture without altering the structure of the main body 1.

[0054] S6-Polishing: Polish the flat part 12 and edges of the main body 1 to improve light transmission and smoothness.

[0055] S7 - Deoiling: Removes protective oil, restores the glass surface, and ensures the integrity of the surface structure of the main body 1.

[0056] S8-Nano 3D Hot Bending: The edge of the main body 1 is hot bent so that the edge of the main body 1 bends from the top surface 10 toward the bottom surface 11, thereby forming a bent part 13 around the flat part 12.

[0057] S9-Temperature: The main body 1 is chemically strengthened to improve the mechanical strength and impact resistance of the flat part 12 and the bending part 13.

[0058] S10 - Silkscreen printing: A silkscreen layer 15 is formed on the edge of the bottom surface 11 of the main body 1, covering at least the bent portion 13 or the cutting surface 14.

[0059] S11-Coating: A nano-coating layer (such as an anti-fouling layer) is formed on the surface of the etched texture 2 to further enhance the anti-interference performance of the top surface 10.

[0060] S12 - Adhesive Application: A transparent adhesive layer 3 (such as AB glue) is applied to the bottom surface 11 of the main body 1 to ensure a tight fit between the main body 1 and the display screen 4.

[0061] S13 - Finished Product: After inspection and trimming, the final protective film product is obtained, which includes structures such as flat part 12, bent part 13, etched texture 2, and silkscreen layer 15.

[0062] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A protective film, comprising a body (1), said body (1) including a top surface (10) and a bottom surface (11), said bottom surface (11) for bonding with a display screen (4), characterized in that, The top surface (10) is provided with an etched texture (2), which includes multiple polygonal pits (20).

2. The protective film according to claim 1, characterized in that, The multiple polygonal recesses (20) are adjacent to each other, and the polygonal recesses (20) include one or more of triangular recesses, quadrilateral recesses, pentagonal recesses, and hexagonal recesses.

3. The protective film according to claim 1, characterized in that, The main body (1) includes a planar portion (12) and a bent portion (13). The bent portion (13) is formed by bending from the top surface (10) of the main body (1) to the bottom surface (11) and is disposed around the planar portion (12). The etched texture (2) is distributed on the planar portion (12) and / or the bent portion (13).

4. The protective film according to claim 1, characterized in that, The circumcircle diameter of any of the polygonal recesses (20) ranges from 0.1 to 1.5 micrometers.

5. The protective film according to claim 1, characterized in that, The depth of any of the polygonal pits (20) in the thickness direction of the main body (1) ranges from 0.3 to 1 micrometer.

6. The protective film according to claim 1, characterized in that, The main body (1) includes a flat portion (12) and a bent portion (13), the bent portion (13) being formed by bending the top surface (10) of the main body (1) towards the bottom surface (11) and being disposed around the flat portion (12).

7. The protective film according to claim 6, characterized in that, The main body (1) also includes a cutting surface (14) disposed on the bent portion (13), the cutting surface (14) being a smooth inclined surface.

8. The protective film according to claim 7, characterized in that, The cutting surface (14) is provided on the top surface (10) and / or bottom surface (11) of the bent portion (13).

9. The protective film according to claim 7, characterized in that, The main body (1) also includes a screen printing layer (15), which is disposed on the edge of the bottom surface (11) of the bent portion (13) and covers at least the cutting surface (14).

10. The protective film according to claim 9, characterized in that, The screen printing layer (15) at least covers the bent portion (13).

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