A conformable screen

Abstract

The present application relates to a kind of attached screen, including display component and protective lens, protective lens covers the front side of display component;The front side of display component is divided into display area and peripheral area, peripheral area has first adhesive surface, the rear side of protective lens has second adhesive surface, second adhesive surface and first adhesive surface are mutually adhered by adhesive layer between first adhesive surface, adhesive layer is silicone adhesive layer, the manufacturing process of silicone adhesive layer is as follows: pad spacer particle is mixed into silicone adhesive, the silicone adhesive mixed with pad spacer particle is coated between first adhesive surface and second adhesive surface, when attaching, pressure is applied to first adhesive surface and second adhesive surface, the silicone adhesive mixed with pad spacer particle is pressed thin, widened after first adhesive surface and second adhesive surface, and is cured to form silicone adhesive layer into silicone adhesive layer.This attached screen not only can make the adhesion of adhesive layer more firm, but also can make the adhesion of adhesive layer keep elasticity and mechanical property stable in low temperature environment, thereby reducing the risk of protective lens falling off.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically to a bonding screen. Background Technology

[0002] A laminated screen typically includes a display component (such as a liquid crystal display, an organic light-emitting display, or an LED display) and a protective lens that is bonded to the front of the display component. This protective lens is usually a glass plate and serves both to protect the display component and to enhance its aesthetics.

[0003] Currently, protective lenses are typically bonded to display components using adhesive layers. These bonding methods are mainly divided into two types: peripheral bonding (frame bonding) and full bonding. Peripheral bonding refers to bonding where the adhesive layer is only applied to the periphery of the display component, not within the display area itself. This method offers advantages such as simple manufacturing and high yield. For large-area displays, especially when a single protective lens needs to be bonded to two or more display components to form a multi-screen setup, peripheral bonding effectively ensures a high bonding yield, and even if bonding defects occur, disassembly and rework are easy.

[0004] However, since the adhesive layer is only placed in the peripheral area, the bonding surface is usually small. When the display screen area is large, the force is greater. Moreover, the adhesive layer is mostly made of foam double-sided tape, which is not tight enough and cannot make full contact with uneven bonding surfaces. Furthermore, its adhesion mainly relies on van der Waals forces, which are relatively weak physical adsorption forces. In addition, the adhesive layer is prone to becoming brittle in low-temperature environments (such as winter car environments), which leads to a further reduction or even complete loss of adhesion, thus greatly increasing the risk of the protective lens falling off. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a bonding screen that not only makes the adhesive layer bond more firmly, but also maintains the elasticity and mechanical stability of the adhesive layer in low-temperature environments, thereby reducing the risk of the protective lens falling off. The technical solution adopted is as follows:

[0006] A bonding screen includes a display component and a protective lens, the protective lens covering the front side of the display component; the front side of the display component is divided into a display area and a peripheral area surrounding the display area, the peripheral area having a first adhesive surface, and the rear side of the protective lens having a second adhesive surface opposite to the first adhesive surface, the second adhesive surface and the first adhesive surface being bonded together by an adhesive layer, characterized in that: the adhesive layer is a silicone adhesive layer, the specific manufacturing process of the silicone adhesive layer is as follows: spacer particles are mixed into silicone adhesive, the silicone adhesive mixed with spacer particles is applied between the first adhesive surface and the second adhesive surface, pressure is applied to the first adhesive surface and the second adhesive surface during bonding, the silicone adhesive mixed with spacer particles is thinned and widened by the first adhesive surface and the second adhesive surface and then cured to form a silicone adhesive layer.

[0007] Specifically, the spacer particles can be pre-mixed evenly into the silicone adhesive. These particles can be plastic or glass particles with a uniform particle size, which can be selected from approximately 50 to 200 μm. The spacer particles are used to maintain a uniform thickness throughout the adhesive layer, ensuring a relatively consistent spacing in the display area of ​​the display component. This avoids optical defects such as Newton's rings caused by excessively small spacing.

[0008] During the bonding process, a thicker or higher layer of silicone adhesive can be pre-applied to the first or second bonding surface using a dispensing machine or an adhesive coating machine. Then, a protective lens is placed over the front of the display component, and the first bonding surface of the display component and the second bonding surface of the protective lens are aligned and pressed together. Under pressure, the uncured silicone adhesive is thinned and widened by the first and second bonding surfaces, and in the process, it forms a tight bond with the first and second bonding surfaces. After curing (such as natural curing), an adhesive layer is formed, thereby forming an adhesive layer between the second and first bonding surfaces, thus producing the bonded screen. The above bonding process is simpler than using foam adhesive. Furthermore, the silicone adhesive, when pressed and spread thin in its uncured state, flows readily and forms a tight bond with the first and second bonding surfaces, effectively filling any unevenness. During the curing process, silicone adhesive generally undergoes a chemical reaction, forming not only van der Waals forces but also chemical bonds (such as hydrogen bonds with the glass surface) with the first and second bonding surfaces, resulting in a stronger bond. Moreover, due to its excellent low-temperature resistance, with a glass transition temperature (Tg) as low as -125°C, silicone adhesive maintains its elasticity and mechanical stability even at extreme temperatures ranging from -60°C to -55°C. Even when the bonded screen is placed in a low-temperature environment (such as a winter automotive environment), the adhesive layer will not become brittle, thus reducing the risk of the protective lens detaching.

[0009] The silicone sealant can be a one-component or a two-component silicone sealant. One-component silicone sealant generally cures by adsorbing air moisture and is suitable for narrow bonding areas. Two-component silicone sealant requires mixing components A and B before curing and is suitable for wider bonding areas. The silicone sealant can also be an acidic adhesive or a neutral adhesive that will not corrode the display component circuitry (such as silicone sealant using alcohols or ketoximes as curing agents). As a preferred embodiment of the invention, the silicone sealant is a high-viscosity silicone sealant. The viscosity of high-viscosity silicone sealant is generally 1000–5000 mPa·s. Therefore, the silicone sealant does not have self-flowing properties before curing, and it is less prone to cavitation when pressed thin by the first and second bonding surfaces, thus ensuring a tight connection between the protective lens and the display component.

[0010] Specifically, the display component can be a liquid crystal display, an organic light-emitting display, or an LED display. Its peripheral area generally refers to its non-display area, which typically contains non-pixel structures such as peripheral circuitry. The first bonding surface of the display component can be a portion of the exposed glass or plastic substrate (such as PI), or a portion of the surface of a plastic film (such as a polarizer or retardation film). The protective lens can be a glass plate, and its second bonding surface can be a portion of its rear surface. Specifically, it can be an exposed glass surface, an ink layer (such as black ink) disposed on the rear side of the protective lens, or a portion of the surface of a plastic film (such as an optical retardation film) attached to the rear side of the protective lens.

[0011] In a preferred embodiment of the present invention, the first bonding surface is an exposed glass surface. This allows the silanol groups (-Si-OH) on the adhesive layer surface to potentially form hydrogen bonds with the silicon-oxygen bonds (Si-O-Si) on the glass surface, enhancing interfacial adhesion. In addition, the first bonding surface can be subjected to plasma treatment to form Si-O-Si covalent bonds between the adhesive layer and the glass surface, resulting in even stronger interfacial adhesion.

[0012] In another preferred embodiment of the present invention, the front side of the display component is a glass surface, to which a plastic film extending to the peripheral area is attached. The first adhesive surface is a first uneven surface formed by the exposed glass surface and a portion of the surface of the plastic film, and the adhesive layer forms a mechanical fit with the first uneven surface. This makes the adhesion between the adhesive layer and the first adhesive surface more robust.

[0013] In a preferred embodiment of the present invention, the second bonding surface is an exposed glass surface. This allows the silanol groups (-Si-OH) on the adhesive layer surface to potentially form hydrogen bonds with the silicon-oxygen bonds (Si-O-Si) on the glass surface, enhancing interfacial adhesion. In addition, the second bonding surface can be subjected to plasma treatment to form Si-O-Si covalent bonds between the adhesive layer and the glass surface, resulting in even stronger interfacial adhesion.

[0014] In another preferred embodiment of the present invention, a shielding layer is provided in the peripheral area of ​​the protective lens, and the second adhesive surface is located within the shielding layer. Within the second adhesive surface, the shielding layer is partially hollowed out or left open to expose the glass surface of the protective lens. The second adhesive surface is a second uneven surface formed by the exposed glass surface and the surface of the shielding layer, and the adhesive layer forms a mechanical fit with the second uneven surface. This makes the adhesion between the adhesive layer and the second adhesive surface more robust. Specifically, the shielding layer can be an ink layer or enamel layer printed on the peripheral area of ​​the protective lens, or a dark (e.g., black) photosensitive resin coating with a pattern formed by a photoluminescence process, and the thickness of the shielding layer is at least 3 μm.

[0015] As a further preferred embodiment of the present invention, the adhesive layer is a dark-colored (e.g., black) silicone adhesive layer, and the shielding layer is a dark-colored (e.g., black) ink layer or enamel layer. Specifically, the adhesive layer can be a silicone adhesive colored with a dark dye (e.g., carbon). This ensures the consistency of color in the peripheral area of ​​the protective lens.

[0016] As a further preferred embodiment of the present invention, the shielding layer is partially hollowed out to form hollow areas that expose the glass surface, and the hollow areas are distributed in a fine dot pattern. This further ensures the color consistency of the surrounding area of ​​the protective lens.

[0017] In a preferred embodiment of the present invention, the adhesive layer is annular with at least one opening. When the aforementioned bonding screen is bonded, the opening is used to vent air from the display area of ​​the display component.

[0018] As a preferred embodiment of the present invention, a circular polarizer is further attached to the outer surface of the protective lens. The circular polarizer is used to eliminate air layer reflections in the display area, so that the laminated screen maintains a consistent appearance between the display area and the surrounding area.

[0019] As a preferred embodiment of the present invention, the bonding screen is a multi-screen display having at least two display components, each display component having a first adhesive surface; correspondingly, the protective lens has at least two second adhesive surfaces, and the first adhesive surfaces of each display component are respectively bonded to the corresponding second adhesive surfaces of the protective lens through an adhesive layer.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] This type of laminated screen uses a silicone adhesive layer as the bonding layer to achieve mutual adhesion between the first and second bonding surfaces when bonding the display components and protective lenses. The silicone adhesive layer is formed by applying silicone adhesive between the first and second bonding surfaces, which is then pressed thin by the first and second bonding surfaces and cured. The bonding operation is simpler than using foam adhesive, and the silicone adhesive, when pressed thin and widened in its uncured state, easily forms a tight bond with the first and second bonding surfaces due to its local flow, even if the first and second bonding surfaces are uneven, it can be fully filled. In contrast, silicone adhesive generally undergoes a chemical reaction during the curing process. In addition to van der Waals forces, it may also form chemical bonds (such as hydrogen bonds with the glass surface) with the first and second bonding surfaces, thus forming a stronger bond. This avoids the need for full lamination on all screens, greatly reducing the difficulty and cost of lamination. Moreover, due to the excellent low-temperature resistance of silicone adhesive, with a glass transition temperature (Tg) as low as -125°C, it can maintain elasticity and stable mechanical properties at extreme low temperatures of -60°C to -55°C. Even if the laminated screen is placed in a low-temperature environment (such as a winter car environment), the adhesive layer will not become brittle, thereby reducing the risk of the protective lens falling off. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the bonding screen provided in the preferred embodiment of the present invention, Example 1.

[0023] Figure 2 yes Figure 1 The diagram shows the fabrication process of the silicone adhesive layer in the bonding screen.

[0024] Figure 3 yes Figure 1 The diagram shows the structure of the shielding layer in the bonding screen.

[0025] Figure 4 This is a perspective view of the bonding screen provided in the preferred embodiment of the present invention, Example 2. Detailed Implementation

[0026] Example 1: As Figures 1-3As shown, this type of bonding screen includes a display component 1 and a protective lens 2, with the protective lens 2 covering the front side of the display component 1. The front side of the display component 1 is divided into a display area 101 and a peripheral area 102 surrounding the display area 101. The peripheral area 102 has a first adhesive surface 11, and the rear side of the protective lens 2 has a second adhesive surface 21 opposite to the first adhesive surface 11. The second adhesive surface 21 and the first adhesive surface 11 are bonded to each other by a silicone adhesive layer 3. The specific manufacturing process of the silicone adhesive layer 3 is as follows: spacer particles 31 are pre-uniformly mixed into silicone adhesive 30, and the silicone adhesive 30 mixed with spacer particles 31 is applied between the first adhesive surface 11 and the second adhesive surface 21. During bonding, pressure is applied to the first adhesive surface 11 and the second adhesive surface 21, and the silicone adhesive 30 mixed with spacer particles 31 is thinned and widened by the first adhesive surface 11 and the second adhesive surface 21 and then cured to form the silicone adhesive layer 3.

[0027] In this embodiment, the spacer particles 31 can be plastic particles or glass particles with a uniform particle size, and the particle size can be selected to be approximately between 50 and 200 μm. The spacer particles 31 are used to maintain a uniform thickness throughout the silicone adhesive layer 3, so that the display area 101 of the display component 1 also maintains a relatively uniform spacing, thereby avoiding optical defects such as Newton's rings caused by excessively small spacing.

[0028] The silicone sealant 30 can be a one-component silicone sealant 30 or a two-component silicone sealant 30. One-component silicone sealant 30 generally cures by absorbing air moisture and is suitable for narrow bonding areas. Two-component silicone sealant 30 requires mixing components A and B before curing and is suitable for wider bonding areas. The silicone sealant 30 can also be an acidic adhesive or a neutral adhesive that will not corrode the circuitry of the display component 1 (such as silicone sealant 30 using alcohols or ketoximes as curing agents). In this embodiment, the silicone sealant 30 is a high-viscosity silicone sealant 30. The viscosity of high-viscosity silicone sealant 30 is generally 1000-5000 mPa·s. Therefore, the silicone sealant 30 does not have self-flowing properties before curing, and it is less prone to cavitation when pressed thin by the first bonding surface 11 and the second bonding surface 21, thus ensuring a tight connection between the protective lens 2 and the display component 1.

[0029] In this embodiment, the display component 1 can be a liquid crystal display, an organic light-emitting display, or an LED display. Its peripheral area 102 generally refers to its non-display area, which is generally provided with non-pixel structures such as peripheral lines.

[0030] In this embodiment, the front side of the display component 1 is a glass surface, to which a plastic film 4 extending to the peripheral area 102 is attached. Within the peripheral area 102, the first bonding surface 11 is a first uneven surface formed by the exposed glass surface 10 of the front side of the display component 1 and a portion of the surface 401 of the plastic film 4. The silicone adhesive layer 3 is mechanically interlocked with the first uneven surface. This allows the silanol groups (-Si-OH) on the surface of the silicone adhesive layer 3 to potentially form hydrogen bonds with the silicon-oxygen bonds (Si-O-Si) on the glass surface, enhancing interfacial adhesion. In addition, the first bonding surface can be plasma-treated to form Si-O-Si covalent bonds between the silicone adhesive layer 3 and the glass surface, resulting in stronger interfacial adhesion. Furthermore, the mechanical interlocking of the silicone adhesive layer 3 with the first uneven surface makes the adhesion between the silicone adhesive layer 3 and the first bonding surface 11 more robust.

[0031] In this embodiment, the peripheral area 102 of the protective lens 2 is provided with a shielding layer 5 with a thickness of at least 3μm, and the second adhesive surface 21 is within the range of the shielding layer 5; within the range of the second adhesive surface 21, the shielding layer 5 is partially hollowed out to form a hollow area 51 to expose the glass surface of the protective lens 2. The hollow area 51 is distributed in a fine dot pattern. The second adhesive surface 21 is formed by the glass surface 20 of the protective lens 2 exposed by the hollow area 51 and a part of the surface 501 of the shielding layer 5 to form a second high and low surface. The silicone adhesive layer 3 is mechanically fitted with the second high and low surface. This allows the silanol groups (-Si-OH) on the surface of the silicone adhesive layer 3 to potentially form hydrogen bonds with the silicon-oxygen bonds (Si-O-Si) on the glass surface, enhancing interfacial adhesion. In addition, plasma treatment can be applied to the second bonding surface to form Si-O-Si covalent bonds between the silicone adhesive layer 3 and the glass surface, resulting in stronger interfacial adhesion. Furthermore, the silicone adhesive layer 3 forms a mechanical interlock with the second high and low surfaces, making the adhesion between the silicone adhesive layer 3 and the second bonding surface 21 even stronger.

[0032] In this embodiment, the silicone adhesive layer 3 can be a silicone adhesive 30 colored with a dark dye (such as carbon); the shielding layer 5 can be a dark (such as black) ink layer or glaze layer printed on the peripheral area 102 of the protective lens 2, or a dark (such as black) photosensitive resin coating with a pattern formed by a photoluminescence process. This ensures the consistency of color in the peripheral area 102 of the protective lens 2.

[0033] In this embodiment, the silicone adhesive layer 3 is annular with at least one opening. When the aforementioned bonding screen is bonded, the opening is used to vent air from the display area 101 of the display component 1.

[0034] In this embodiment, a circular polarizer 6 is also attached to the outer surface of the protective lens 2. The circular polarizer 6 is used to eliminate air layer reflection in the display area 101, so that the laminated screen has a consistent appearance between the display area 101 and the surrounding area 102.

[0035] The following is a brief description of the bonding method for this type of screen:

[0036] During bonding, a thicker or higher layer of silicone adhesive 30 can be pre-applied to the second bonding surface 21 using a dispensing machine or an adhesive coating machine. Then, the protective lens 2 is placed over the front of the display component 1, and the first bonding surface 11 of the display component 1 and the second bonding surface 21 of the protective lens 2 are aligned and pressed together. Under pressure, the uncured silicone adhesive 30 is thinned and widened by the first bonding surface 11 and the second bonding surface 21, and in the process, it forms a tight bond with the first bonding surface 11 and the second bonding surface 21. After curing (such as natural curing), a silicone adhesive layer 3 is formed between the second bonding surface 21 and the first bonding surface 11, thus obtaining the bonded screen.

[0037] Example 2: Reference Figure 4 While all other parts are the same as in Embodiment 1, the difference is that the bonding screen provided in this embodiment is a multi-screen, which has two display components 1, each display component 1 having a first adhesive surface 11; correspondingly, the protective lens 2 has two second adhesive surfaces 21, and the first adhesive surfaces 11 of each display component 1 are bonded to the corresponding second adhesive surfaces 21 of the protective lens 2 through a silicone adhesive layer 3.

[0038] Furthermore, it should be noted that the names of the various parts of the specific embodiments described in this specification may differ. All equivalent or simple variations made to the structure, features, and principles of this invention are included within the scope of protection of this invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this invention or exceed the scope defined by the claims, all of which should fall within the scope of protection of this invention.

Claims

1. A bonding screen, comprising a display component and a protective lens, the protective lens covering the front side of the display component; the front side of the display component is divided into a display area and a peripheral area surrounding the display area, the peripheral area having a first adhesive surface, and the rear side of the protective lens having a second adhesive surface opposite to the first adhesive surface, the second adhesive surface and the first adhesive surface being bonded together by an adhesive layer, characterized in that: The adhesive layer is a silicone adhesive layer. The specific manufacturing process of the silicone adhesive layer is as follows: spacer particles are mixed into the silicone adhesive. The spacer particles are plastic particles or glass particles with a uniform particle size, which is a value between 50 and 200 μm. The silicone adhesive mixed with spacer particles is applied between the first adhesive surface and the second adhesive surface. When bonding, pressure is applied to the first adhesive surface and the second adhesive surface. The silicone adhesive mixed with spacer particles is thinned and widened by the first adhesive surface and the second adhesive surface and then cured to form a silicone adhesive layer. The first bonding surface is an exposed glass surface. A plastic film is attached to the front side of the display component, extending to the peripheral area. The exposed glass surface and a portion of the plastic film form a first uneven surface. The silicone adhesive layer is mechanically fitted to the first uneven surface. The second bonding surface is an exposed glass surface. A shielding layer is provided in the peripheral area of ​​the protective lens. The second bonding surface is within the range of the shielding layer. Within the range of the second bonding surface, a partial perforation is formed in the shielding layer to create a perforation hole. The glass surface exposed by the perforation hole and a portion of the shielding layer form a second uneven surface. The silicone adhesive layer is mechanically fitted to the second uneven surface.

2. The bonding screen according to claim 1, characterized in that: The silicone sealant is a high-viscosity silicone sealant.

3. The bonding screen according to claim 1, characterized in that: The adhesive layer is a dark-colored silicone adhesive layer, and the masking layer is a dark-colored ink layer or glaze layer.

4. The bonding screen according to claim 1, characterized in that: The shielding layer has partial cutouts to expose the glass surface, and the cutout areas are distributed in a fine dot pattern.

5. A bonding screen according to claim 1, characterized in that: The adhesive layer is annular with at least one opening.

6. A bonding screen according to claim 1, characterized in that: A circular polarizer is also attached to the outer surface of the protective lens.

7. A bonding screen according to any one of claims 1-6, characterized in that: The bonding screen is a multi-screen unit with at least two display components, each display component having a first adhesive surface; correspondingly, the protective lens has at least two second adhesive surfaces, and the first adhesive surfaces of each display component are bonded to the corresponding second adhesive surfaces of the protective lens through an adhesive layer.

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