OCA bonding module with high adhesion

Abstract

The utility model relates to display equipment technical field especially a kind of OCA attachment module with high adhesion, including bearing reinforcement substrate, the front end surface of bearing reinforcement substrate is connected with stress dispersion layer by compression bonding, the front end surface of stress dispersion layer is adhered and is connected with strong adhesion layer, the front end surface of strong adhesion layer is adhered and is connected with OCA glue layer optimization structure, the front end surface of OCA glue layer optimization structure is provided with bright surface polaroid structure, the rear end surface of bearing reinforcement substrate is coated with moisture-proof barrier layer.The utility model relates to a kind of OCA attachment module with high adhesion, adopt bright surface polaroid design, after OCA attachment, bright surface polaroid adopts the design of bright surface and is attached with good adhesion effect, and effectively reduce bubble bad rate, the good attachment between bright surface polaroid and OCA glue layer optimization structure, avoid air residue, thereby reduce the probability of bubble generation, improve display quality, provide more clear, non-interference display picture for user.

Description

Technical Field

[0001] This utility model relates to the field of display device technology, and in particular to an OCA bonding module with high adhesion. Background Technology

[0002] In the field of display technology, OCA (Optical Clear Adhesive) is widely used in various display devices, and its performance directly affects the display effect and product quality. However, the polarizer on the existing OCA bonding surface adopts a sandblasted design. After OCA bonding, the sandblasted surface of the polarizer has poor adhesion, which makes it easy for the polarizer to fall off during use, affecting the normal use of the display device. At the same time, the sandblasted design also results in a high rate of air bubbles. These air bubbles will form visual interference in the display screen, reduce display quality, and seriously affect the user experience. Therefore, we have launched an OCA bonding module with high adhesion. Utility Model Content

[0003] The main objective of this invention is to provide an OCA bonding module with high adhesion, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An OCA bonding module with high adhesion includes a support and reinforcement substrate. A stress dispersion layer is pressed and connected to the front end face of the support and reinforcement substrate. A strong adhesion layer is adhered and connected to the front end face of the stress dispersion layer. An optimized OCA adhesive layer structure is adhered and connected to the front end face of the strong adhesion layer. A bright polarizer structure is provided on the front end face of the optimized OCA adhesive layer structure. A moisture barrier layer is coated on the rear end face of the support and reinforcement substrate.

[0006] Preferably, the glossy polarizer structure includes a glossy polarizer layer, the front end face of the glossy polarizer layer is provided with a wear-resistant protective layer, and the rear end face of the glossy polarizer layer is provided on the front end face of the OCA adhesive layer optimized structure.

[0007] By adopting the above technical solution, a glossy polarizer design is used. Compared with the traditional sandblasted structure, the surface flatness of the glossy polarizer layer is greatly improved. When bonded with the optimized structure of the OCA adhesive layer, the intermolecular contact area is increased, and higher adhesion is achieved through physical adsorption and chemical action, effectively avoiding the risk of detachment. At the same time, the smooth surface makes it easier for air to escape during the bonding process, significantly reducing the bubble defect rate, reducing light scattering and interference, ensuring clear and transparent display images, and improving the picture quality of display devices.

[0008] Preferably, the load-bearing and reinforcing substrate is made of polyethylene terephthalate, the stress dispersion layer is made of ethylene-vinyl acetate copolymer, and the moisture barrier layer is made of polyvinylidene chloride coating.

[0009] By adopting the above technical solution: the load-bearing and reinforcing substrate is made of polyethylene terephthalate, which has the characteristics of high strength and high rigidity, and can provide a stable support structure for the entire OCA bonding module.

[0010] The stress dispersion layer is made of ethylene-vinyl acetate copolymer, which, thanks to its excellent elasticity and flexibility, can quickly undergo elastic deformation when the module is subjected to external impact or thermal stress caused by temperature changes.

[0011] The moisture barrier layer uses a polyvinylidene chloride coating, which has extremely low water vapor permeability and can form a dense moisture barrier on the module surface.

[0012] Preferably, the bright polarizing film layer is a cellulose triacetate film, and the wear-resistant protective layer is a diamond-like carbon film.

[0013] By adopting the above technical solution: the bright polarizing film layer uses cellulose triacetate film, which has excellent surface flatness and can achieve close contact with the OCA adhesive layer when bonded, thus enhancing adhesion;

[0014] The wear-resistant protective layer uses a diamond-like carbon film, which has a hardness close to that of natural diamond and has excellent wear resistance and scratch resistance.

[0015] Preferably, the optimized structure of the OCA adhesive layer includes an elastic buffer layer, a highly active surface layer is provided on the front end face of the elastic buffer layer, an interface enhancement layer is provided on the front end face of the highly active surface layer, and the rear end face of the elastic buffer layer is adhered to the front end face of the strong adhesion layer.

[0016] Preferably, the elastic buffer layer is supplemented with a silane coupling agent, the highly active surface layer is made of polyurethane acrylate, and the interface reinforcement layer is made of silica aerogel film.

[0017] By adopting the above technical solution, the molecular structure of the silane coupling agent enhances the bonding strength between the elastic buffer layer and the adjacent layer, effectively resists interlayer delamination caused by external stress, and reduces microcracks caused by differences in the thermal expansion coefficients of materials or mechanical impact, thereby improving the structural stability and durability of the entire OCA bonding module.

[0018] The highly active surface layer of polyurethane acrylate material has both high viscosity and good elastic modulus. Its high viscosity ensures that it forms a tight physical adsorption and chemical bond with the elastic buffer layer and the interface reinforcement layer, while the moderate elastic modulus allows it to undergo reversible deformation under stress, effectively dispersing external stress. This characteristic allows the highly active surface layer to adhere between the reinforcement layers and work together with the elastic buffer layer to absorb impact energy, protecting the internal structure of the module from mechanical damage.

[0019] Silica aerogel films have an extremely high specific surface area (up to 800-1000 m²). 2 The silica aerogel film has a nanoporous structure, which allows it to form a large physical contact area when in contact with highly active surface layers and bright polarizing film layers. It achieves super-strong adsorption through van der Waals forces. At the same time, the nanoporous structure of the silica aerogel film can also effectively capture the tiny bubbles generated during the bonding process, significantly reducing the bubble defect rate and improving optical transmittance and display clarity.

[0020] Preferably, the interface enhancement layer is disposed on the rear end face of the glossy polarizer layer.

[0021] By adopting the above technical solution, the interface enhancement layer is set at the rear end of the glossy polarizer layer. Its special microstructure and material properties can effectively fill the microscopic defects on the surface of the glossy polarizer layer, increase the actual contact area with the OCA adhesive layer, and achieve tight bonding with the glossy polarizer layer by means of intermolecular forces. This reduces air residue during the bonding process, greatly reduces the probability of bubble formation, improves the bonding accuracy between optical components, and ensures that the display image is clear and flawless.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In this utility model, a glossy polarizer design is adopted. After OCA bonding, the glossy polarizer has good adhesion due to its glossy design. Moreover, the surface of the glossy polarizer is smooth, making it easier for air to escape during the bonding process, thereby reducing the defect rate of air bubbles, improving display quality, and providing users with a clearer and interference-free display. The strong adhesion layer is tightly connected with the stress dispersion layer and the elastic buffer layer, providing a reliable adhesion foundation. The elastic buffer layer reacts chemically with the stress dispersion layer and the highly active surface layer through a silane coupling agent, enhancing the interlayer bonding force. The highly active surface layer adheres tightly to the interface enhancement layer due to its high viscosity, thereby improving the adhesion of the entire module and effectively solving the problem of polarizers easily falling off in the prior art.

[0024] 2. In this utility model, the load-bearing and reinforcing substrate is made of polyethylene terephthalate, which provides stable support for the entire module and prevents the module from deforming during use. The stress dispersion layer is made of ethylene-vinyl acetate copolymer, which can effectively disperse the stress caused by external force or temperature change, avoid stress concentration from damaging the module structure, and enable the module to remain stable under various environmental conditions, thereby improving the reliability and service life of the product.

[0025] 3. In this utility model, the diamond-like carbon film of the wear-resistant protective layer has high hardness, which can resist external scratches and wear, protect the optical performance of the bright polarizer layer, and prevent it from affecting the display effect due to surface damage. At the same time, the polyvinylidene chloride coating of the moisture-proof barrier layer can isolate external moisture and prevent water vapor from entering and causing aging of the OCA adhesive layer and deterioration of polarizer performance, thereby improving the environmental adaptability and optical performance stability of the module. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an OCA bonding module with high adhesion according to the present invention;

[0027] Figure 2 This is a rear view of the overall structure of an OCA bonding module with high adhesion according to this utility model;

[0028] Figure 3 This utility model relates to an OCA bonding module with high adhesion. Figure 2 Enlarged view of the structure at point A in the image;

[0029] Figure 4 This is an exploded view of the overall structure of an OCA bonding module with high adhesion according to this utility model;

[0030] Figure 5 This is a schematic diagram of the optimized OCA adhesive layer structure of an OCA bonding module with high adhesion according to this utility model.

[0031] Figure 6 This is a schematic diagram of the structure of a glossy polarizer for an OCA bonding module with high adhesion according to this utility model.

[0032] In the figure: 1. Supporting and reinforcing substrate; 2. Stress dispersion layer; 3. Strong adhesion layer; 4. Optimized OCA adhesive layer structure; 5. Glossy polarizer structure; 6. Moisture barrier layer; 41. Elastic buffer layer; 42. Highly active surface layer; 43. Interface enhancement layer; 51. Glossy polarizer layer; 52. Wear-resistant protective layer. Detailed Implementation

[0033] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0034] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] Please see Figure 1-6 This utility model provides a technical solution:

[0037] An OCA bonding module with high adhesion includes a support and reinforcement substrate 1, a stress dispersion layer 2 is pressed and connected to the front end face of the support and reinforcement substrate 1, a strong adhesion layer 3 is adhered and connected to the front end face of the stress dispersion layer 2, an OCA adhesive layer optimization structure 4 is adhered and connected to the front end face of the strong adhesion layer 3, a bright polarizer structure 5 is provided on the front end face of the OCA adhesive layer optimization structure 4, and a moisture barrier layer 6 is coated on the rear end face of the support and reinforcement substrate 1.

[0038] In this embodiment, the bright polarizer structure 5 includes a bright polarizer layer 51, with a wear-resistant protective layer 52 disposed on the front end face of the bright polarizer layer 51, and the rear end face of the bright polarizer layer 51 disposed on the front end face of the OCA adhesive layer optimized structure 4; the supporting and reinforcing substrate 1 is made of polyethylene terephthalate, the stress dispersion layer 2 is made of ethylene-vinyl acetate copolymer, and the moisture barrier layer 6 is made of polyvinylidene chloride coating; the bright polarizer layer 51 is made of cellulose triacetate film, and the wear-resistant protective layer 52 is made of diamond-like carbon. The carbon film; the optimized structure 4 of the OCA adhesive layer includes an elastic buffer layer 41, a highly active surface layer 42 is provided on the front end of the elastic buffer layer 41, an interface reinforcement layer 43 is provided on the front end of the highly active surface layer 42, and the rear end of the elastic buffer layer 41 is adhered to the front end of the strong adhesion layer 3; a silane coupling agent is added to the elastic buffer layer 41, the highly active surface layer 42 is made of polyurethane acrylate, and the interface reinforcement layer 43 is made of silica aerogel film; the interface reinforcement layer 43 is provided on the rear end of the glossy polarizer layer 51.

[0039] It should be noted that this utility model is an OCA bonding module with high adhesion. During use, the supporting and reinforcing substrate 1 is made of polyethylene terephthalate (PET), which provides stable support for the entire module due to its high strength, preventing deformation during use. The stress dispersion layer 2 is made of ethylene-vinyl acetate copolymer. When the module is subjected to external force or stress due to temperature changes, its elastic deformation, together with the internal structure, evenly disperses the stress, preventing stress concentration from damaging the module structure. The strong adhesion layer 3 is tightly connected to the stress dispersion layer 2 and the elastic buffer layer 41, providing a reliable adhesion base. The elastic buffer layer 41 is composed of polyurethane acrylate with added silane coupling agent. During bonding, it can effectively absorb external pressure and deformation. At the same time, through the chemical reaction between the silane coupling agent and the stress dispersion layer 2 and the highly active surface layer 42, it enhances the interlayer bonding force. The surface layer 42, with its high adhesion, adheres tightly to the silica aerogel film of the interface reinforcement layer 43. The special structure of the aerogel film surface increases the contact area, and a stable connection is achieved through intermolecular forces and the chemical action of the silane coupling agent. The interface reinforcement layer 43 and the glossy polarizer layer 51 are bonded together through intermolecular forces, and the glossy surface of the glossy polarizer layer 51 is designed to be in close contact with the silica aerogel film of the interface reinforcement layer 43 and the diamond-like carbon film of the wear-resistant protective layer 52, further enhancing adhesion. The diamond-like carbon film of the wear-resistant protective layer 52 has high hardness and can resist external scratches and wear, protecting the optical performance of the glossy polarizer layer 51 and preventing it from affecting the display effect due to surface damage. The polyvinylidene chloride coating of the moisture barrier layer 6 can isolate external moisture and prevent water vapor from entering and causing aging of the OCA adhesive layer and deterioration of polarizer performance, thereby improving the environmental adaptability and service life of the module.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An OCA bonding module with high adhesion, comprising a support and reinforcing substrate (1), characterized in that: The front end face of the support and reinforcement substrate (1) is press-fitted with a stress dispersion layer (2), the front end face of the stress dispersion layer (2) is adhered to a strong adhesion layer (3), the front end face of the strong adhesion layer (3) is adhered to an OCA adhesive layer optimized structure (4), the front end face of the OCA adhesive layer optimized structure (4) is provided with a bright polarizer structure (5), and the rear end face of the support and reinforcement substrate (1) is coated with a moisture barrier layer (6). The bright polarizer structure (5) includes a bright polarizer layer (51), the front end of the bright polarizer layer (51) is provided with a wear-resistant protective layer (52), and the rear end of the bright polarizer layer (51) is provided on the front end of the OCA adhesive layer optimization structure (4).

2. The OCA bonding module with high adhesion according to claim 1, characterized in that: The supporting and reinforcing substrate (1) is made of polyethylene terephthalate, the stress dispersion layer (2) is made of ethylene-vinyl acetate copolymer, and the moisture barrier layer (6) is made of polyvinylidene chloride coating.

3. The OCA bonding module with high adhesion according to claim 1, characterized in that: The bright polarizing film layer (51) is a cellulose triacetate film, and the wear-resistant protective layer (52) is a diamond-like carbon film.

4. The OCA bonding module with high adhesion according to claim 1, characterized in that: The optimized OCA adhesive layer structure (4) includes an elastic buffer layer (41), a highly active surface layer (42) is provided on the front end face of the elastic buffer layer (41), an interface enhancement layer (43) is provided on the front end face of the highly active surface layer (42), and the rear end face of the elastic buffer layer (41) is adhered to the front end face of the strong adhesion layer (3).

5. The OCA bonding module with high adhesion according to claim 4, characterized in that: The elastic buffer layer (41) is provided with a silane coupling agent, the highly active surface layer (42) is made of polyurethane acrylate, and the interface reinforcement layer (43) is made of silica aerogel film.

6. The OCA bonding module with high adhesion according to claim 4, characterized in that: The interface enhancement layer (43) is disposed on the rear end surface of the glossy polarizer layer (51).

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