Touch screen
By adopting a single-layer PET structure and nano-insulated wire layer in the touch screen, the existing touch screen materials are multiplied and complex production problems are solved, and a low-cost and high-stability touch screen design is achieved.
Patent Information
- Application Number
- CN202420174387.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-24
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-01-24
AI Technical Summary
The existing touch screen has many layers of GFF structural materials, complex production process, high cost, and is prone to problems such as bubble rebound and degumming.
Using a single-layer PET structure, the insulating wire layer is directly coated on the PET layer and bonded to the cover plate through the adhesive layer to simplify the structure, and use nano-insulated wires and double-layer PET to protect the flexural area to reduce the use of optical transparent glue.
The production process is simplified, manufacturing costs are reduced, product thickness is reduced, bubble rebound and degumming problems are avoided, and the structural stability is improved.
Smart Images
Figure CN223167095U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of touch control, and particularly relates to a touch screen. Background Art
[0002] The existing touch screen adopts a GFF structure, which is a five-layer structure touch screen (Touch Panel, abbreviated as: TP) formed by bonding a glass cover plate (Glass) and two layers of soft material films (Film) together with two layers of optical adhesives (OCA). The receiving signal layer (RX) and the transmitting signal layer (TX) of the two conductive lines are respectively engraved on the two layers of soft material films (Film), forming an RX Film layer and a TX Film layer respectively. The GFF five-layer structure is specifically divided into: the first layer is the Glass layer, the second layer is the OCA layer, the third layer is the RX Film layer, the fourth layer is the OCA layer, and the fifth layer is the TX Film layer. Among them, the first layer and the third layer, and the third layer and the fifth layer are separated from each other and must be bonded together through the optical adhesives of the second layer and the fourth layer. The production of the RX Film layer and the TX Film layer usually uses the Film material as a carrier, coats UV glue on the Film carrier, and then engraves the RX circuit and the TX circuit into the UV glue respectively to form a whole with the Film. The existing five-layer GFF structure has many material layers, a relatively complex production process, and a high production cost. Summary of the Utility Model
[0003] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a touch screen with a simplified structure and low cost.
[0004] The purpose of the utility model can be realized by the following technical solutions: a touch screen, including a first PET layer, a first adhesive layer is coated on one side of the first PET layer, an insulating wire layer is arranged on the first adhesive layer, a second adhesive layer covers the other side of the insulating wire layer, and a cover plate is bonded on the second adhesive layer.
[0005] Preferably, a flexure area for binding a flexible circuit board is provided on one side edge of the insulating wire layer. A third adhesive layer is coated on the side of the flexure area close to the cover plate, a second PET layer is bonded on the third adhesive layer, and the other side of the second PET layer is bonded to the cover plate through a fourth adhesive layer.
[0006] Preferably, the insulating wire layer includes a conductive RX circuit and a conductive TX circuit. The projections of the RX circuit and the TX circuit in the vertical direction are in a mesh shape and are not electrically connected to each other.
[0007] Preferably, both the RX circuit and the TX circuit are nano-insulating wires, and the nano-insulating wire includes a wire and an insulating layer coated on the outside of the wire.
[0008] Preferably, the first adhesive layer, the second adhesive layer, the third adhesive layer, and the fourth adhesive layer are all OCA optical adhesives.
[0009] The beneficial effects of the present utility model are as follows: 1. In the present utility model, the insulating wire layer is directly applied on the first adhesive layer coated on the surface of the first PET layer, and then the cover plate is adhered through the second adhesive layer, which greatly simplifies the product structure, makes the processing technology simpler, saves the manufacturing cost, and reduces the number of layers of the optical transparent adhesive used. The fewer the adhesive layers, on the one hand, it can effectively reduce the product thickness, and on the other hand, it can reduce problems such as bubble rebound and degumming caused by lamination.
[0010] 2. Since the structure of the single-layer PET at the connection between the wire routing and the FPC is fragile, a second PET layer is adhered through the third adhesive layer on the side of the flexure area close to the cover plate, and the other side of the second PET layer is adhered to the cover plate through the fourth adhesive layer, so that the flexure area has a double-layer PET structure for protection. The structure of this flexure area is improved to avoid functional abnormalities such as wire breakage caused by flexure during the assembly of the entire unit. Description of the Drawings
[0011] The present utility model is further described with the aid of the drawings, but the embodiments in the drawings do not constitute any limitation to the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the following drawings.
[0012] Figure 1 It is a schematic structural diagram of a touch screen of the present utility model.
[0013] Figure 2 It is a schematic cross-sectional diagram of a touch screen of the present utility model.
[0014] Figure 3 It is a schematic structural diagram of the binding of a touch screen of the present utility model and a flexible circuit board.
[0015] The reference numerals shown in the figure are: 1. First PET layer; 2. First adhesive layer; 3. Insulating wire layer; 301. RX line; 302. TX line; 303. Insulating layer; 4. Second adhesive layer; 5. Cover plate; 6. Third adhesive layer; 7. Second PET layer; 8. Fourth adhesive layer; 9. Flexure area; 10. Flexible circuit board. Detailed Embodiments
[0016] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.
[0017] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, such descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0018] Next, the technical solutions of the present utility model will be described clearly and completely in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the protection scope of the present utility model.
[0019] Referring to Figures 1 to 3 As shown, the structure of the present utility model is: a touch screen, including a first PET layer 1, a first adhesive layer 2 is coated on one side of the first PET layer 1, an insulating wire layer 3 is arranged on the first adhesive layer 2, a second adhesive layer 4 covers the other side of the insulating wire layer 3, and a cover plate 5 is adhered to the second adhesive layer 4. Specifically, in the present utility model, the insulating wire layer 3 is directly operated on the first adhesive layer 2 coated on the surface of the first PET layer, and then the cover plate 5 is adhered through the second adhesive layer 4, which greatly simplifies the product structure, the processing technology is also simpler, saves the manufacturing cost, and reduces the number of layers of optical transparent adhesive used. The fewer the adhesive layers, on the one hand, it can effectively reduce the product thickness, and on the other hand, it can reduce problems such as bubble rebound and degumming caused by lamination; among them, the second adhesive layer 4 has the following several functions, as a fixing layer for the insulating wire layer 3 to ensure the correctness of the touch pattern and the touch function, and at the same time as a protective layer for the insulating wire layer 3 to avoid the influence of water vapor, and can also be used as an adhesive layer for the cover plate 5.
[0020] Further, as shown in Figure 1 、 Figure 3As shown in the figure, one side of the insulating wire layer 3 is provided with a flexure area 9 for binding the flexible circuit board 10. A third adhesive layer 6 is coated on the side of the flexure area 9 close to the cover plate 5. A second PET layer 7 is bonded on the third adhesive layer 6, and the other side of the second PET layer 7 is bonded to the cover plate 5 through a fourth adhesive layer 8. Specifically, because the structure of the single-layer PET at the connection between the wiring and the flexible printed circuit (FPC) is fragile, a second PET layer 7 is bonded to the side of the flexure area 9 close to the cover plate 5 through a third adhesive layer 6, and the other side of the second PET layer 7 is bonded to the cover plate 5 through a fourth adhesive layer 8, so that the flexure area 9 has a double-layer PET structure for protection. The structure of this flexure area is improved to avoid abnormal functions such as wire breakage caused by flexure during the assembly of the whole machine.
[0021] Further, as shown in Figure 2 the figure, the insulating wire layer 3 includes a conductive RX line 301 and a conductive TX line 302. The projections of the RX line 301 and the TX line 302 in the vertical direction are in a mesh shape and are not electrically connected to each other.
[0022] Furthermore, both the RX line 301 and the TX line 302 are nano-insulating wires. The nano-insulating wire includes a wire and an insulating layer 303 coated on the outside of the wire. The characteristic of this nano-insulating wire is that an insulating layer 303 is coated outside the wire. In addition to having better signal shielding, the TX line and the RX line can be directly crossed and spanned together to form an induction point for touch signals.
[0023] Furthermore, the first adhesive layer 2, the second adhesive layer 4, the third adhesive layer 6, and the fourth adhesive layer are all OCA optical adhesives.
[0024] During specific use, first, the first adhesive layer 2 is formed on the first PET layer 1 by means of laminating or coating on the PET. The insulating wire layer 3 is implanted onto the first adhesive layer 2 by a wire implantation device according to a pre-designed pattern. This insulating wire layer 3 will form a touch sensing function. The insulating wire layer 3 includes a conductive RX line 301 and a conductive TX line 302. The projections of the RX line 301 and the TX line 302 in the vertical direction are in a mesh shape and are not electrically connected to each other. Both the RX line 301 and the TX line 302 are nano-insulating wires. The nano-insulating wire includes a wire and an insulating layer 303 coated on the outside of the wire. The characteristic of this nano-insulating wire is that an insulating layer 303 is coated outside the wire. In addition to having better signal shielding, the TX line and the RX line can be directly crossed and spanned together to form an induction point for touch signals. Next, the second adhesive layer 4 is coated or attached as an adhesive material for bonding with the cover plate 5. The second adhesive layer 4 has the following functions: as a fixing layer for the nano-insulating wire to ensure the correctness of the touch pattern and the touch function, as a protection layer for the nano-insulating wire to avoid the influence of moisture, and as an adhesive layer for the cover plate 5.
[0025] The above further describes the present utility model by means of specific embodiments. However, it should be understood that this specific description should not be construed as a limitation on the essence and scope of the present utility model. Various modifications made by those of ordinary skill in the art to the above embodiments after reading this specification all fall within the scope protected by the present utility model.
Claims
1. A touch screen, characterized in that: It includes a first PET layer (1), one side of the first PET layer (1) is coated with a first adhesive layer (2), an insulating wire layer (3) is arranged on the first adhesive layer (2), the other side of the insulating wire layer (3) is covered with a second adhesive layer (4), and a cover plate (5) is bonded to the second adhesive layer (4); a flexure area (9) for binding a flexible circuit board (10) is provided on one side edge of the insulating wire layer (3), a third adhesive layer (6) is coated on the side of the flexure area (9) close to the cover plate (5), a second PET layer (7) is bonded to the third adhesive layer (6), and the other side of the second PET layer (7) is bonded to the cover plate (5) through a fourth adhesive layer (8).
2. The touch screen according to claim 1, wherein: The insulating wire layer (3) includes a conductive RX line (301) and a conductive TX line (302), the projections of the RX line (301) and the TX line (302) in the vertical direction are in a mesh shape and are not electrically connected to each other.
3. A touch screen according to claim 2, characterized in that: Both the RX line (301) and the TX line (302) are nano-insulating wires, and the nano-insulating wire includes a wire and an insulating layer (303) coated on the outer side of the wire.
4. A touch screen according to claim 1, characterized in that: The first adhesive layer (2), the second adhesive layer (4), the third adhesive layer (6) and the fourth adhesive layer are all OCA optical adhesives.