A shock-resistant mobile phone glass cover plate

Abstract

The utility model provides a kind of anti-impact mobile phone glass cover plate, including glass substrate layer, coating layer, the top surface of glass substrate layer is covered with a coating layer, the edge of glass substrate layer top surface, the side of glass substrate layer is covered with ink masking layer.The utility model has the advantages that: ink masking layer is extended from top surface edge portion to the side edge (i.e. vertical surface) of glass substrate, forms an L-shaped structure, ink masking layer is epoxy resin material, which has shielding function and energy absorption capacity.In impact, this three-dimensional structure as the first line of defense, through elastic deformation to absorb energy.When external force acts on the edge, the extended lateral portion can disperse stress, reduce the direct stress of glass substrate.The optical adhesive layer is thickened, and the upper edge is connected with the ink masking layer, to enhance the buffer, the synergistic effect of ink masking layer and adhesive layer forms a "frame-buffer" system, which improves the edge stiffness as a whole.

Description

Technical Field

[0001] This utility model relates to the field of glass cover technology, and in particular to an impact-resistant mobile phone glass cover. Background Technology

[0002] As a key component protecting the display screen and touch module, the performance requirements for mobile phone glass covers are constantly increasing. In particular, impact resistance has become one of the core indicators for measuring the reliability of the cover. In daily life, mobile phones are easily impacted by accidental drops or collisions, with the edges and corners being the most vulnerable areas to breakage due to stress concentration.

[0003] Currently, most mainstream mobile phone glass covers use high-aluminosilicate glass as the substrate, and chemically strengthen it to increase surface compressive stress, thereby enhancing scratch and impact resistance. To further improve functionality, multiple functional films are typically applied to the glass substrate, for example: Surface coating layer: AF (anti-fingerprint) coating is adopted, which is achieved by depositing organosilicon material through PVD process to achieve hydrophobic and oleophobic properties; Ink masking layer: Epoxy resin ink is usually applied to the non-display area of ​​the top surface of the glass substrate by screen printing. It is used to hide internal components and decorate the frame; Optical adhesive layer (OCA): It is used to bond the cover plate to the display module and plays a role in bonding, optical conduction and buffering.

[0004] However, the existing technology still has the following obvious shortcomings: Weak edge impact resistance: Traditional ink masking layers only cover the top edge of the glass substrate, which is a two-dimensional planar structure. When the phone is hit by the edge, the impact force is directly transmitted to the junction of the side and top of the glass substrate. Due to the lack of effective stress dispersion and buffering mechanisms, cracks are easily generated and propagate inward.

[0005] Poor interlayer structural synergy: The ink masking layer and the optical adhesive layer are structurally and functionally independent. The optical adhesive mostly terminates at the bottom edge of the glass substrate and does not form a mechanical coupling with the ink layer. Upon impact, the layers are prone to peeling, and energy cannot be effectively absorbed and dissipated. Therefore, an impact-resistant mobile phone glass cover is proposed to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0007] Therefore, one objective of this utility model is to provide an impact-resistant mobile phone glass cover to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0008] To achieve the above objectives, one embodiment of the present invention provides an impact-resistant mobile phone glass cover, comprising a glass substrate layer and a coating layer. The top surface of the glass substrate layer is covered with a coating layer, and the edge of the top surface of the glass substrate layer and the side surface of the glass substrate layer are covered with an ink masking layer, wherein the ink masking layer is three-dimensional. An optical adhesive layer is fixedly connected to the edge of the bottom surface of the glass substrate layer, and the edge of the optical adhesive layer extends to the bottom of the ink masking layer. The optical adhesive layer is designed to be thickened.

[0009] Preferably, in any of the above embodiments, the glass substrate layer is made of high-alumina silicate glass, and the thickness of the glass substrate layer is greater than the thickness of the coating layer.

[0010] The above technical solution involves two parts: the main body, which is the glass substrate layer and forms the foundation of the cover, directly determining its mechanical strength, light transmittance, and weather resistance. The substrate requires cutting and polishing processes.

[0011] The second part is the functional layer, which includes a coating layer, an ink masking layer, and an optical adhesive layer. The coating layer forms a hydrophobic and oleophobic surface through vacuum coating (PVD), which reduces the adhesion of fingerprints and grease and keeps the screen clean.

[0012] The ink masking layer, which is black, is mainly used to cover the internal structures at the edges of the screen (such as ribbon cables and backlight modules), while also enabling branding or decorative design. It is applied to the non-display areas of the glass substrate.

[0013] The optical adhesive layer, located between the glass substrate layer and the underlying touch layer (TP) or display panel (such as OLED), serves both adhesive and optical transmission functions. It achieves bubble-free bonding through a lamination process (vacuum + heating). This eliminates air gaps between the glass and the display module, reducing light refraction loss and improving display clarity; it also buffers against external impacts, protecting the internal structure.

[0014] Preferably, the coating layer is an organosilicon layer, as described in any of the above schemes.

[0015] The above technical solution is adopted as follows: Cover plate composition: Body structure: Glass substrate layer: Made of high-alumina silicate glass with a thickness of 0.5-0.8mm. After CNC precision cutting and double-sided chemical polishing, the main structure of the cover plate is formed, which directly bears external loads and performs optical transmission functions.

[0016] Functional layer system: Coating layer: An 80-150nm organosilicon layer is formed on the top surface of the glass substrate layer by physical vapor deposition (PVD) to achieve hydrophobic and oleophobic properties.

[0017] Ink masking layer: made of black epoxy resin, with an L-shaped three-dimensional structure covering the top edge and sides of the glass substrate layer, with a thickness of 0.1-0.2mm.

[0018] Optical adhesive layer: Thickened OCA optical adhesive film, the epitaxial part of which forms a mechanically interlocked structure with the ink masking layer.

[0019] Preferably, in any of the above embodiments, the ink masking layer is made of epoxy resin, and the cross-sectional shape of the ink masking layer is L-shaped.

[0020] The improvement of this mobile phone glass cover using the above technical solution lies in upgrading the existing ink masking layer and optical adhesive layer into an integrated three-dimensional structure, forming a continuous energy absorption band at the edge of the glass substrate. This not only strengthens the edge but also improves the interlayer bonding strength, reducing stress concentration and crack propagation during impact. The ink masking layer extends from the top edge to the side edge (i.e., the vertical surface) of the glass substrate, forming an L-shaped structure. The ink masking layer is made of epoxy resin, which combines masking function and energy absorption capacity. During impact, this three-dimensional structure acts as the first line of defense, absorbing energy through elastic deformation. When external force acts on the edge, the extended lateral portion can disperse stress, reducing the direct force on the glass substrate. The optical adhesive layer is thickened and connects to the ink masking layer at its edge, enhancing buffering. The synergistic effect of the ink masking layer and the adhesive layer forms a "frame-buffer" system, improving the overall edge stiffness.

[0021] Preferably, in any of the above embodiments, the optical adhesive layer is an OCA film, and the optical adhesive layer is bonded to the ink masking layer.

[0022] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows: This impact-resistant mobile phone glass cover upgrades the existing ink masking layer and optical adhesive layer into an integrated three-dimensional structure, forming a continuous energy absorption band at the edge of the glass substrate. This not only strengthens the edges but also improves interlayer adhesion strength, reducing stress concentration and crack propagation during impact. The ink masking layer extends from the top edge to the side edge (i.e., the vertical surface) of the glass substrate, forming an L-shaped structure. The ink masking layer is made of epoxy resin, which combines masking function and energy absorption capacity. During impact, this three-dimensional structure acts as the first line of defense, absorbing energy through elastic deformation. When external force is applied to the edge, the extended lateral portion can disperse stress, reducing the direct force on the glass substrate. The optical adhesive layer is thickened and connects to the ink masking layer at its edge, enhancing cushioning. The synergistic effect of the ink masking layer and the adhesive layer forms a "frame-buffer" system, improving overall edge stiffness.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a first-view structural schematic diagram of the present invention; Figure 2 This is a structural schematic diagram of the present invention from a second perspective; Figure 3 This is a structural schematic diagram of the present invention from a third-view perspective; Figure 4 This is a schematic diagram of the layer structure of this utility model.

[0025] In the diagram: 1-glass substrate layer, 2-coating layer, 3-ink masking layer, 4-optical adhesive layer. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] like Figure 1-4 As shown, this impact-resistant mobile phone glass cover includes a glass substrate layer 1 and a coating layer 2. The top surface of the glass substrate layer 1 is covered with a coating layer 2, and the edge of the top surface of the glass substrate layer 1 and the side surface of the glass substrate layer 1 are covered with an ink masking layer 3. The ink masking layer 3 is three-dimensional. An optical adhesive layer 4 is fixedly connected to the edge of the bottom surface of the glass substrate layer 1. The edge of the optical adhesive layer 4 extends to the bottom of the ink masking layer 3. The optical adhesive layer 4 is designed to be thickened.

[0029] Example 1: The glass substrate layer 1 is made of high-alumina silicate glass, and its thickness is greater than that of the coating layer 2. The coating layer 2 is specifically an organosilicon layer. The ink masking layer 3 is made of epoxy resin, and its cross-sectional shape is L-shaped. The optical adhesive layer 4 is specifically an OCA film, and it is bonded to the ink masking layer 3.

[0030] Example 2: This mobile phone glass cover consists of two parts: the main body, which is the glass substrate layer 1, the foundation of the cover, and directly determines its mechanical strength, light transmittance, and weather resistance. The substrate needs to undergo cutting and polishing processes.

[0031] The second part is the functional layer, which includes a coating layer 2, an ink masking layer 3, and an optical adhesive layer 4. The coating layer 2 forms a hydrophobic and oleophobic surface through vacuum coating (PVD), which reduces the adhesion of fingerprint grease and keeps the screen clean.

[0032] The ink masking layer 3, which is black, is mainly used to cover the internal structures (such as ribbon cables and backlight modules) at the edges of the screen, while also enabling branding or decorative design. It is typically placed in the non-display area of ​​the glass substrate.

[0033] Optical adhesive layer 4, located between glass substrate layer 1 and the underlying touch layer (TP) or display panel (such as OLED), serves as both adhesive and optical transmission layer. It achieves bubble-free bonding through a lamination process (vacuum + heating). This eliminates air gaps between the glass and the display module, reducing light refraction loss and improving display clarity; it also buffers external impacts and protects the internal structure. Cover plate composition: Body structure: Glass substrate layer 1: Made of high-alumina silicate glass, 0.5-0.8mm thick. After CNC precision cutting and double-sided chemical polishing, it forms the main structure of the cover plate, directly bearing external loads and providing optical transmission.

[0034] Functional layer system: Coating layer 2: An 80-150nm organosilicon layer is formed on the top surface of glass substrate layer 1 by physical vapor deposition (PVD) to achieve hydrophobic and oleophobic properties.

[0035] Ink masking layer 3: made of black epoxy resin, it covers the top edge and sides of the glass substrate layer 1 in an L-shaped three-dimensional structure, with a thickness of 0.1-0.2mm.

[0036] Optical adhesive layer 4: Thickened OCA optical adhesive film, the epitaxial portion of which forms a mechanical interlocking structure with ink masking layer 3.

[0037] The working principle of this utility model is as follows: Stress dispersion stage: The impact energy is first absorbed by the vertical sidewalls of the ink masking layer 3, and the elastic deformation of the epoxy resin consumes the impact kinetic energy. Energy transfer stage: Residual stress is conducted to the thickened optical adhesive layer 4 through the bonding interface between the ink masking layer 3 and the optical adhesive layer 4, and the colloidal compression deformation consumes energy twice. Crack blocking stage: The L-shaped ink masking layer 3 forms a physical barrier at the edge of the glass substrate layer 1, blocking the crack from propagating along the side of the glass substrate layer 1; Synergistic protection stage: The thickened design of the optical adhesive layer 4 increases the impact force dispersion area, and together with the ink masking layer 3, it forms a "rigid-flexible composite protection ring", which improves the drop resistance performance compared with the traditional structure.

[0038] Manufacturing process flow: Substrate processing: High-alumina silicate glass sheets are CNC cut into the cover plate outline; double-sided chemical polishing is performed; Functional layer fabrication: The deposition of the second coating layer is completed in the vacuum chamber: glass substrate layer 1, plasma cleaning, preheating at 150°C, and finally magnetron sputtering of SiOxCyHz film layer; Ink masking layer 3 stereolithography: mask positioning, then 360° inkjet printing, then 80℃ pre-curing, and finally UV secondary curing to form an L-shaped outline.

[0039] Lamination Assembly: Pre-cut optical adhesive layer 4: Extend 0.2mm beyond the edge of glass substrate layer 1. Vacuum lamination process: Lamination parameters: 160℃ / 0.5MPa / 120s, hold pressure and cool to below 45℃. Edge bonding: The extension of optical adhesive layer 4 forms a 0.1-0.15mm overlap area with the bottom surface of ink masking layer 3.

[0040] Compared with the prior art, the present invention has the following advantages: The existing ink masking layer 3 and optical adhesive layer 4 are upgraded into an integrated three-dimensional structure, forming a continuous energy absorption band at the edge of the glass substrate. This not only strengthens the edge but also improves interlayer adhesion strength, reducing stress concentration and crack propagation during impact. The ink masking layer 4 extends from the top edge to the side edge (i.e., the vertical surface) of the glass substrate, forming an L-shaped structure. The ink masking layer 4 is made of epoxy resin, which combines masking function and energy absorption capacity. During impact, this three-dimensional structure acts as the first line of defense, absorbing energy through elastic deformation. When external force is applied to the edge, the extended lateral portion can disperse stress, reducing the direct force on the glass substrate. The optical adhesive layer 4 is thickened, and its upper edge connects to the ink masking layer 3 to enhance buffering. The synergistic effect of the ink masking layer and the adhesive layer forms a "frame-buffer" system, improving the overall edge stiffness.

Claims

1. An impact-resistant mobile phone glass cover, characterized in that, It includes a glass substrate layer (1) and a coating layer (2). The top surface of the glass substrate layer (1) is covered with a coating layer (2). The edge of the top surface of the glass substrate layer (1) and the side surface of the glass substrate layer (1) are covered with an ink masking layer (3). The ink masking layer (3) is three-dimensional. An optical adhesive layer (4) is fixedly connected to the edge of the bottom surface of the glass substrate layer (1). The edge of the optical adhesive layer (4) extends to the bottom of the ink masking layer (3). The optical adhesive layer (4) is designed to be thickened.

2. The impact-resistant mobile phone glass cover as described in claim 1, characterized in that: The glass substrate layer (1) is made of high aluminosilicate glass, and the thickness of the glass substrate layer (1) is greater than the thickness of the coating layer (2).

3. The impact-resistant mobile phone glass cover as described in claim 2, characterized in that: The coating layer (2) is specifically an organosilicon layer.

4. The impact-resistant mobile phone glass cover as described in claim 3, characterized in that: The ink masking layer (3) is made of epoxy resin and has an L-shaped cross-section.

5. The impact-resistant mobile phone glass cover as described in claim 4, characterized in that: The optical adhesive layer (4) is specifically an OCA adhesive film, and the optical adhesive layer (4) is bonded to the ink masking layer (3).

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