Spliced film Sensor

Abstract

The embodiment of the utility model belongs to the technical field of display screens. The utility model also relates to a splicing type film sensor. The splicing type film sensor comprises a film sensor main body and a thin film wiring structure, the film Sensor main body comprises a visual area touch pattern and is used for receiving and processing a touch signal; and the thin film wiring structure is arranged on the peripheral side of the film Sensor main body and is used for realizing wiring. The thin film sensor is composed of the film sensor body and the thin film wiring structure, the effective layout of sensor wiring is guaranteed on the premise that the screen-to-body ratio and the bending performance are not sacrificed, specifically, the film sensor body serves as a main carrier of a touch pattern, and the size and the shape of the film sensor body can be customized according to the actual requirements of a screen; the thin film wiring structure serves as a carrier of the wiring area, has good flexibility and bendability and can adapt to deformation of the screen in the bending process, and perfect combination of the narrow frame design and the bent screen design can be achieved by splicing and fixedly connecting the thin film wiring structure and the screen.

Description

Technical Field

[0001] The utility model relates to the technical field of display screens, and more specifically, to a spliced ​​film sensor. Background Art

[0002] With the rapid advancement of smartphone technology, consumers' pursuit of mobile phone appearance and display effects is also increasing. Against this background, the concept of screen-to-body ratio came into being and became an important indicator in mobile phone design. Screen-to-body ratio, that is, the ratio of the screen to the front panel area of ​​the device, reflects the utilization value of the screen in a limited space. A higher screen-to-body ratio means a wider field of view and a more immersive visual experience, and is therefore enthusiastically sought after by consumers.

[0003] In order to achieve a higher screen-to-body ratio, mobile phone manufacturers have adopted narrow-frame design to reduce the width of the screen frame and increase the visible area of ​​the screen. However, as the screen-to-body ratio continues to increase, the space left for sensor routing becomes increasingly limited. Sensor routing is an important part of connecting the screen touch circuit and the motherboard. Its layout and design are directly related to the touch performance and stability of the mobile phone. How to ensure the reasonable layout of sensor routing while ensuring the narrow-frame design has become a major challenge for mobile phone manufacturers. Therefore, we have made improvements to this and proposed a spliced ​​film sensor.

[0004] For example, a Chinese patent (publication number CN213069785U) discloses a narrow-frame capacitive screen and its touch-type capacitive screen, and its specification discloses: large-size capacitive screens have a large area and a large number of channels (and the number of channels will be even larger in the future). More and more channels mean more and more data and more and more wiring. However, each wiring is independent and on the same plane, so the increase in wiring will inevitably lead to an increase in the area of ​​the wiring, causing the border of the capacitive screen to become visually wider, and the appearance of the whole device to look less beautiful. The above patents can prove the defects of the existing technology. Utility Model Content

[0005] The technical problem to be solved by the embodiments of the present invention is that in order to achieve a higher screen-to-body ratio, mobile phone manufacturers have adopted a narrow-frame design to reduce the width of the screen frame, thereby increasing the visible area of ​​the screen. However, as the screen-to-body ratio continues to increase, the space left for sensor routing becomes increasingly limited.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A spliced ​​film sensor comprises: a film sensor body and a film wiring structure; the film sensor body comprises a visual area touch pattern for receiving and processing touch signals; the film wiring structure is arranged on the outer peripheral side of the film sensor body for realizing wiring, and the film wiring structure is bendable to realize a narrow frame of the film sensor body.

[0008] As an improved approach of the present invention, the thin film wiring structure is further connected to an FPC body.

[0009] As an improved manner of the utility model, the film wiring structure includes a PET film layer, and the PET film layer is arranged on the outer peripheral side of the film sensor body.

[0010] As an improved manner of the utility model, a sensor wiring layer is arranged on the PET film layer, and the sensor wiring layer is connected to the film sensor body.

[0011] As an improvement of the utility model, the PET film layer is used to carry the sensor wiring layer, and the PET film layer can be bent toward the back of the film sensor body to achieve a narrow frame of the film sensor body while ensuring the wiring.

[0012] As an improvement of the utility model, the side of the sensor wiring layer away from the PET film layer is connected with an ACF conductive film layer.

[0013] As an improved manner of the utility model, the ACF conductive adhesive film layer is connected to the FPC body.

[0014] As an improved manner of the utility model, the thin film wiring structure further includes an optical adhesive layer, and the optical adhesive layer is adhered to a side of the PET thin film layer away from the sensor wiring layer.

[0015] As an improved manner of the utility model, a superelastic layer is connected to a side of the optical adhesive layer away from the PET film layer.

[0016] Compared with the prior art, the embodiments of the present invention mainly have the following beneficial effects:

[0017] In order to solve the problem in the prior art that as the screen-to-body ratio continues to increase, the space left for sensor routing becomes increasingly limited, the present application consists of a film sensor body and a thin film routing structure, which achieves an effective layout of the sensor routing without sacrificing the screen-to-body ratio and bending performance. Specifically, the film sensor body serves as the main carrier of the touch pattern, and its size and shape can be customized according to the actual needs of the screen; while the thin film routing structure serves as the carrier of the routing area, which has good flexibility and bendability, and can adapt to the deformation of the screen during the bending process. By splicing and fixing the two, a perfect combination of narrow bezel and curved screen design can be achieved. By bending the thin film routing structure, the routing area can be wrapped around the back of the display module, or combined with other diversified designs of the customer to achieve a narrow bezel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of the spliced ​​film sensor provided in this application;

[0019] Figure 2 The spliced ​​film sensor provided for this application Figure 1 Exploded diagram of

[0020] Figure 3 This is a stack diagram of the thin film routing structure of the spliced ​​film sensor provided in this application.

[0021] Indicated in the figure:

[0022] 1. Film sensor body; 2. Film routing structure; 201. PET film layer; 202. Sensor routing layer; 203. ACF conductive film layer; 204. Optical adhesive layer; 205. Superelastic layer; 3. FPC body. DETAILED DESCRIPTION

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present invention belongs; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. Reference to "embodiments" herein means that specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0024] As recorded in the background technology, in order to achieve a higher screen-to-body ratio, mobile phone manufacturers have adopted a narrow-frame design to reduce the width of the screen frame, thereby increasing the visible area of ​​the screen. However, as the screen-to-body ratio continues to increase, the space left for sensor routing has become increasingly limited. The sensor routing is an important part connecting the screen touch circuit and the motherboard. Its layout and design are directly related to the touch performance and stability of the mobile phone. How to ensure the reasonable layout of the sensor routing while ensuring the narrow-frame design has become a major challenge facing mobile phone manufacturers.

[0025] In order to solve this technical problem, the utility model provides a spliced ​​film sensor.

[0026] Specifically, please refer to Figure 1-Figure 2 , the spliced ​​film sensor specifically includes:

[0027] The film sensor body 1 and the film wiring structure 2; the film sensor body 1 includes a visual area touch pattern for receiving and processing touch signals; the film wiring structure 2 is arranged on the outer peripheral side of the film sensor body 1 for realizing wiring, and the film wiring structure 2 is bendable to realize the narrow frame of the film sensor body 1.

[0028] The spliced ​​film sensor provided by the utility model is composed of a film sensor body 1 and a thin film wiring structure 2, which realizes the effective layout of the sensor wiring without sacrificing the screen-to-body ratio and bending performance. Specifically, the film sensor body 1 serves as the main carrier of the touch pattern, and its size and shape can be customized according to the actual needs of the screen; and the thin film wiring structure 2 serves as the carrier of the wiring area, which has good flexibility and bendability, and can adapt to the deformation of the screen during the bending process. By splicing and fixing the two, a perfect combination of narrow frame and curved screen design can be achieved. By bending the thin film wiring structure 2, the wiring area can be wrapped around the back of the display module, or combined with other diversified designs of customers to achieve a narrow frame.

[0029] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] Embodiment 1 of the spliced ​​film sensor of the utility model

[0033] Please refer to Figure 1-Figure 2 The utility model spliced ​​film sensor includes: a film sensor body 1 and a film wiring structure 2; the film sensor body 1 includes a visual area touch pattern for receiving and processing touch signals; the film wiring structure 2 is arranged on the outer peripheral side of the film sensor body 1 for realizing wiring, and the film wiring structure 2 is bendable to realize a narrow frame of the film sensor body 1. The present application is composed of the film sensor body 1 and the film wiring structure 2, which realizes the sensor without sacrificing the screen ratio and bending performance. Effective layout of wiring. Specifically, the film sensor body 1 is the main carrier of the touch pattern, and its size and shape can be customized according to the actual needs of the screen; while the thin film wiring structure 2 is the carrier of the wiring area, which has good flexibility and bendability and can adapt to the deformation of the screen during bending. By splicing and fixing the two, the perfect combination of narrow frame and curved screen design can be achieved. By bending the thin film wiring structure 2, the wiring area can be bypassed behind the display module, or combined with other diversified designs of customers to achieve a narrow frame;

[0034] Film sensors are a special type of sensor used primarily in touchscreen technology, especially when used in conjunction with display technologies such as LCD or OLED displays. Film sensors are usually made of a layer of transparent conductive material with fine touch patterns engraved on it. These touch patterns, when touched by a user's finger or other object, produce tiny current changes. These current changes are then converted into electronic signals that are analyzed and interpreted by the device's processor.

[0035] Film Sensor can accurately detect the touch position of the user's finger or other objects, and convert this information into electronic signals for use by the device's processor; Film Sensor usually supports multi-touch, which means it can detect multiple touch points at the same time and accurately determine their position and movement trajectory. This function allows users to interact with the device using multiple fingers or different parts of the palm, thereby achieving more complex operations and gestures; In addition to basic touch detection, Film Sensor can also be combined with software algorithms to recognize user gestures. For example, users can control objects on the screen or execute specific commands through gestures such as sliding, zooming, and rotating; By providing precise, fast and responsive touch experience, Film Sensor allows users to interact with electronic devices more naturally and intuitively; Film Sensor is highly flexible and adaptable, and can be customized and optimized according to different application requirements, for example, in mobile phones, tablets, laptops, vehicle systems, self-service terminals and other fields.

[0036] Embodiment 2 of the spliced ​​film sensor of the utility model

[0037] The utility model spliced ​​film sensor further includes: Figure 1-Figure 2 As shown, the thin film wiring structure 2 is also connected to an FPC body 3. FPC is a flexible printed circuit board made of polyimide or polyester film as a substrate, and has the characteristics of high reliability, excellent flexibility, high wiring density, light weight, thin thickness, and good bendability. The high flexibility and flexibility of FPC enable it to adapt to various complex wiring requirements, especially in touch screen applications that require bending, folding or rotation. This flexibility ensures the stability and reliability of the touch screen in various forms and usage scenarios. The light weight and thin thickness of FPC make the entire touch screen system lighter and more compact, which is particularly important for mobile devices such as mobile phones and tablets, because they need to reduce weight and size as much as possible to improve user portability and usage experience. The high temperature resistance of FPC ensures that it can still maintain stability and reliability at higher operating temperatures.

[0038] In this application, the film sensor body 1 is responsible for detecting the user's touch operations and converting these operations into electronic signals; while the FPC body 3 is responsible for transmitting these electronic signals to the device's processor for processing and analysis. This combination enables the touch screen system to achieve an accurate, fast and responsive touch experience, thereby improving the user's experience and satisfaction.

[0039] Further, such as Figure 3As shown, the film wiring structure 2 includes a PET film layer 201, and the PET film layer 201 is arranged on the outer peripheral side of the film sensor body 1. The PET film has good transparency and gloss, excellent mechanical properties, and the best toughness among all thermoplastics. Its tensile strength and impact strength are much higher than those of ordinary films, and it has good strength and stable dimensions. The PET film has good heat resistance and cold resistance, remains stable at high temperatures, and has excellent oil resistance and acid resistance, but poor alkali resistance.

[0040] Optical properties: PET film has low haze, high light transmittance and high surface finish, making it very suitable for use as high-end vacuum aluminum-plated products and laser anti-counterfeiting base films.

[0041] Further, such as Figure 3 As shown, a sensor wiring layer 202 is disposed on the PET film layer 201 , the sensor wiring layer 202 is connected to the film sensor body 1 , and the PET film layer 201 can carry the sensor wiring layer 202 .

[0042] Further, such as Figure 3 As shown, the PET film layer 201 is used to carry the sensor wiring layer 202, and the PET film layer 201 can be bent toward the back of the film sensor body 1 to achieve a narrow frame of the film sensor body 1 while ensuring wiring.

[0043] Further, such as Figure 3 As shown, the side of the sensor wiring layer 202 away from the PET film layer 201 is connected to the ACF conductive film layer 203. The ACF conductive film is a conductive material used in the connection of electronic components. Its main feature is that it has electrical conductivity in the vertical direction and insulation in the horizontal direction. This property is called anisotropic conductivity. The ACF conductive film is mainly composed of a polymer substrate and metal particles, wherein the polymer substrate provides basic support and insulation, while the metal particles are responsible for achieving electrical conduction in the vertical direction. The special structure of the ACF conductive film enables it to avoid short circuits between adjacent electrodes while maintaining high conductivity.

[0044] Further, such as Figure 1-Figure 2 As shown, the ACF conductive film layer 203 is connected to the FPC body 3 .

[0045] Embodiment 3 of the spliced ​​film sensor of the utility model

[0046] The utility model spliced ​​film sensor further includes: Figure 3As shown, the thin film wiring structure 2 also includes an optical adhesive layer 204, which is attached to the side of the PET thin film layer 201 away from the sensor wiring layer 202. The optical adhesive layer 204 is OCA optical adhesive, which is a special adhesive used to bond transparent optical components and belongs to the category of pressure-sensitive adhesive. Its main features include colorless and transparent, high light transmittance, high adhesion, water and high temperature resistance, UV resistance, good bonding strength, and small curing shrinkage.

[0047] Further, such as Figure 3 As shown, the optical adhesive layer 204 is connected to a superelastic layer 205 on one side away from the PET film layer 201. The superelastic layer includes a rubber superelastic layer, a gel superelastic layer, and a polyurethane superelastic layer. Through the design of the superelastic layer 205, the film wiring structure 2 has flexibility, so that the film wiring structure 2 can recover after bending.

[0048] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A spliced ​​film sensor, characterized in that: include: A film sensor body (1) and a thin film wiring structure (2); the film sensor body (1) comprises a visual area touch pattern for receiving and processing touch signals; the thin film wiring structure (2) is arranged on the outer peripheral side of the film sensor body (1) for realizing wiring, and the thin film wiring structure (2) is bendable to realize a narrow frame of the film sensor body (1).

2. The spliced ​​film sensor according to claim 1, characterized in that: The thin film wiring structure (2) is also connected to an FPC body (3).

3. The spliced ​​film sensor according to claim 2, characterized in that: The film wiring structure (2) comprises a PET film layer (201), and the PET film layer (201) is arranged on the outer peripheral side of the film sensor body (1).

4. The spliced ​​film sensor according to claim 3, characterized in that: A sensor wiring layer (202) is provided on the PET film layer (201), and the sensor wiring layer (202) is connected to the film sensor body (1).

5. The spliced ​​film sensor according to claim 4, characterized in that: The PET film layer (201) is used to carry the sensor wiring layer (202), and the PET film layer (201) can be bent toward the back of the film sensor body (1) to achieve a narrow frame of the film sensor body (1).

6. The spliced ​​film sensor according to claim 5, characterized in that: A side of the sensor wiring layer (202) away from the PET film layer (201) is connected to an ACF conductive adhesive film layer (203).

7. The spliced ​​film sensor according to claim 6, characterized in that: The ACF conductive adhesive film layer (203) is connected to the FPC body (3).

8. The spliced ​​film sensor according to claim 7, characterized in that: The thin film wiring structure (2) further comprises an optical adhesive layer (204), wherein the optical adhesive layer (204) is adhered to a side of the PET thin film layer (201) away from the sensor wiring layer (202).

9. The spliced ​​film sensor according to claim 8, characterized in that: A superelastic layer (205) is connected to a surface of the optical adhesive layer (204) that is away from the PET film layer (201).

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