Touch display module of OFS structure
Patent Information
- Application Number
- CN202522103438.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-29
- Publication Date
- 2026-09-15
- Estimated Expiration
- 2035-09-29
AI Technical Summary
1、本实用新型通过采用单层柔性薄膜集成触控传感器，彻底摒弃了传统的玻璃盖板加双层薄膜（GFF）或玻璃基板（OGS），使触控功能模组的物理厚度减少和重量减轻，为终端设备释放了内部空间，为搭载更大容量电池或更复杂的元器件提供了可能。
Smart Images
Figure CN224759000U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of touch display technology, specifically an OFS structure touch display module. Background Technology
[0002] As mobile terminals evolve towards greater flexibility, foldability, and ultra-thinness, the thickness, weight, and optical performance of touch display modules, as core components of human-computer interaction, have become key indicators determining product competitiveness. Add-on touch solutions, especially One Film Solutions (OFS), demonstrate significant potential in flexible devices, wearable electronics, and mid-to-high-end differentiated products due to their inherent compatibility with flexible displays, lower cost, and thinner profile compared to glass-glass solutions. Utility Model Content
[0003] This utility model provides an OFS structure touch display module, which can adopt zero-bonding cover plate, frame-bonded cover plate or cover plate-free solution. It has a simple structure, low process difficulty and high production efficiency, while achieving the requirements of traditional On-Cell structure touch thinness.
[0004] An OFS-structured touch display module, comprising at least: Touch module: The touch module is a flexible touch module, including a base film and a touch functional layer. The touch functional layer includes a first touch electrode, an insulating layer, and a second touch electrode stacked sequentially. The base film is an anti-glare, anti-reflection, anti-fingerprint, hardened base film or a combination thereof, and its hardness is at least 1H. A black border is provided around the touch module, and the black border is located on the upper or lower surface of the touch module. The touch module includes an FPC, and the touch chip and its peripheral circuits of the touch module are located on the FPC, or the touch chip and its peripheral circuits are located on a PCB board, and the FPC is connected to the PCB board. First bonding adhesive: used for bonding touch modules and display modules; Display module.
[0005] The size of the touch module does not exceed the size of the display module, or the size of the touch module exceeds the size of the display module.
[0006] The OFS structure touch display module can adopt a coverless design, reducing the use of one cover layer and effectively reducing the thickness of the touch display module.
[0007] The touch module includes a cover plate and a second adhesive for bonding the cover plate. The cover plate is either a flexible cover plate or a rigid cover plate. Preferably, the cover plate is a flexible cover plate, using an AG base film or a hardened base film with a hardness of at least 3H. The black border is located on the upper or lower surface of the cover plate.
[0008] The total thickness of the touch module and the first adhesive does not exceed 0.65 mm.
[0009] The black border is formed by printing with black ink or by pasting with black adhesive material. The width of the black border is 0.1-40mm. The thickness of the black border formed by black ink does not exceed 30μm, and the thickness of the black border formed by black adhesive material does not exceed 100μm.
[0010] The touch functional layer is disposed on the upper and lower surfaces of the base film. When the touch functional layer is disposed on the upper surface of the base film, the touch module further includes a cover plate and a second adhesive for bonding the cover plate. Preferably, the touch functional layer is located on the lower surface of the base film. Preferably, the first touch electrode and the second touch electrode are made of transparent conductive material of silver nanowires or composite conductive material of silver nanowires.
[0011] The insulating layer is made of organic insulating materials, such as acrylates or modified polyimide.
[0012] The base film is a functionalized base film, and the functionalization methods include one or more of anti-glare, anti-fingerprint, anti-reflection, hardening, and anti-reflection. The functionalized layer is located on the non-conductive surface of the base film.
[0013] The flexible cover plate includes a functional layer, and the functionalization methods include one or more of anti-glare, anti-fingerprint, anti-reflection, hardening, and anti-reflection. The functional layer is located on the side of the flexible cover plate away from the display module.
[0014] The base film is made of one of the following materials: polyester (PET), cyclic olefin polymer (COP), colorless polyimide (CPI), polypropylene (PP), polyethylene (PE), and triacetate cellulose (TAC). Optionally, the base film includes a post-processed base film. The post-processing methods include, but are not limited to, one or more of anti-reflective treatment, anti-reflective treatment, hardening treatment, and anti-glare treatment. The thickness of the base film is 10-300 μm.
[0015] The touch display module has a size of 1-150 inches.
[0016] The OFS structure of this utility model is an external touch technology that achieves touch display function by superimposing an OFS structure touch module on the outside of the display module.
[0017] The system connection of a touch display module typically relies on a flexible printed circuit board (FPC). One end of the FPC is bonded to the substrate of the display panel or the traces of the touch sensor using anisotropic conductive adhesive (ACF), while the other end is connected to a printed circuit board (PCB). This FPC and PCB setup achieves higher space utilization, better structural stability, and lower overall cost while ensuring module performance and reliability.
[0018] The technical effects of this utility model are: 1. This utility model completely eliminates the traditional glass cover plate plus double-layer film (GFF) or glass substrate (OGS) by adopting a single-layer flexible thin film integrated touch sensor, thereby reducing the physical thickness and weight of the touch function module, freeing up internal space for terminal devices, and making it possible to install larger capacity batteries or more complex components.
[0019] 2. The core functional layer of this utility model is based on flexible thin film material, which enables the module to have the characteristics of being flexible and rollable. This characteristic directly empowers the next generation of innovative electronic product forms such as foldable mobile phones, rollable TVs, and flexible wearable devices, and is a key enabling technology for the future flexible electronic ecosystem.
[0020] 3. This utility model adopts a single-layer thin film structure, which eliminates the need for a layer of thin film, a layer of optical adhesive (OCA) and the corresponding multi-layer lamination process, significantly reducing material costs and manufacturing costs.
[0021] 4. By reducing one thin film and one bonding interface, this utility model significantly reduces the reflection and scattering loss of light in the multi-layer medium, thereby improving the overall light transmittance of the touch module, making the screen display brighter and the colors more vibrant, while also reducing the power consumption of the device.
[0022] 5. The flexible film material of this invention can absorb and disperse impact energy, avoiding the risk of glass substrates being easily broken.
[0023] 6. This utility model innovatively utilizes a black border pattern design, which greatly enhances the light-blocking effect and more effectively covers the edge lines of the touch module. Attached Figure Description
[0024] In the accompanying drawings, the same reference numerals represent the same or similar components. For ease of understanding, some components in the drawings are infinitely enlarged. The specific shapes in the drawings are unrelated to the actual shapes of the components and are only for identification and explanation. Obviously, those skilled in the art can obtain other drawings based on these drawings without any inventive effort.
[0025] Figure 1This is a schematic diagram of a touch module according to an embodiment of this application, wherein the touch chip and its peripheral circuit of the OFS structure touch module are located on the FPC; Figure 2 This is a schematic diagram of a touch module according to an embodiment of this application, wherein the touch chip and peripheral circuit of the OFS structure touch module are located on the PCB board, and the FPC is connected to the PCB board; Figure 3 This is a schematic diagram of the stacked structure of the touch display module of this application, wherein the touch module includes a black border, which is not shown in the figure; Figure 4 This is a schematic diagram of a cover plate touch display module stacked structure according to an embodiment of the present application, wherein the touch module includes a black border, which is not shown in the figure; Figure 5 This is a schematic diagram of a cover plate touch display module stacked structure according to another embodiment of this application, wherein the touch module includes a black border, which is not shown in the figure; Figure 6 This is a schematic diagram showing the black border of this application located on the surface of the touch module; Figure 7 This is a schematic diagram showing the black border of this application located on the surface of the cover plate; Figure 8 This is a schematic diagram of the touch function layer of the OFS touch module in this application.
[0026] Figure label: 100 is the touch module; 101 is the touch module stacked structure; 111 is the base film; 112 is the touch functional layer; 1121 is the first touch electrode; 1122 is the second touch electrode; 1123 is the insulating layer; 113 is the base film functionalization layer; 114 is the black border; 102 is the FPC; 103 is the PCB board; 120 is the second adhesive; 130 is the cover plate; 131 is the cover plate substrate; 132 is the cover plate functionalization layer; 200 is the first adhesive; 300 is the display module. Detailed Implementation
[0027] The following are examples of embodiments of this utility model. Those skilled in the art should understand that the listed embodiments are only some embodiments of this utility model and should not be regarded as specific limitations on this application.
[0028] Example 1 like Figure 3 The diagram shows the stacked structure of the touch display module, which includes, from top to bottom, a functional layer 113, a base film 111, a touch functional layer 112, a first adhesive 200, and a display module 300.
[0029] An OFS-structured touch display module, comprising at least: Touch module 100: The touch module is a flexible touch module, including a base film 111 and a touch functional layer 112, wherein the touch functional layer 112 is as follows: Figure 8 As shown, it includes a first touch electrode 1121, an insulating layer 1123, and a second touch electrode 1122. The base film is an anti-glare, anti-reflection, anti-fingerprint, hardened base film or a combination thereof, and its hardness is at least 1H. A black border 114 is provided around the touch module (e.g., ...). Figure 6 As shown), the black border is located on the upper or lower surface of the touch module; as Figure 1 As shown, the touch module 100 includes a touch module stack-up structure 101 and an FPC 102. The touch chip and its peripheral circuits of the touch module are located on the FPC, or as shown in the figure. Figure 2 As shown, the touch chip and peripheral circuits are located on the PCB board 103, and the FPC 102 is connected to the PCB board 103. First bonding adhesive 200: Used for bonding touch modules and display modules; Display module 300.
[0030] The total thickness of the touch module and the first adhesive does not exceed 0.65 mm.
[0031] The black border is formed by printing with black ink or by pasting with black adhesive material. The width of the black border is 0.1-40mm. The thickness of the black border formed by black ink does not exceed 30μm, and the thickness of the black border formed by black adhesive material does not exceed 100μm.
[0032] The touch-sensitive functional layer is disposed on the lower surface of the base film. The base film is a functionalized base film, and the functionalization methods include one or more of anti-glare, anti-fingerprint, anti-reflection, hardening, and anti-reflection. The functionalized layer is located on the upper surface of the base film.
[0033] The touch display module has a size of 1-150 inches.
[0034] Example 2 like Figure 4 The diagram shows a stacked structure of a touch display module, comprising, from top to bottom, a cover plate functional layer 132, a cover plate substrate 131, a second adhesive 120, a base film 111, a touch functional layer 112, a first adhesive 200, and a display module 300. The cover plate functional layer 132 and the cover plate substrate 131 together form the cover plate 130. The touch functional layer 112 is located on the lower surface of the base film 111.
[0035] Or, such as Figure 5The diagram shows a stacked structure of a touch display module, comprising, from top to bottom, a cover plate functional layer 132, a cover plate substrate 131, a second adhesive 120, a touch functional layer 112, a base film 111, a first adhesive 200, and a display module 300. The cover plate functional layer 132 and the cover plate substrate 131 together form the cover plate 130. The touch functional layer is located on the upper surface of the base film.
[0036] The touch function layer is as follows Figure 8 As shown, it includes a first touch electrode 1121, an insulating layer 1123, and a second touch electrode 1122; the black border 114 is disposed around the touch module (e.g., Figure 6 As shown), the black border is located on the upper or lower surface of the touch module, or the black border is located on the upper or lower surface of the cover plate (as shown). Figure 7 As shown); Figure 1 As shown, the touch module 100 includes a touch module stack-up structure 101 and an FPC 102. The touch chip and its peripheral circuits of the touch module are located on the FPC, or as shown in the figure. Figure 2 As shown, the touch chip and peripheral circuits are located on the PCB board 103, and the FPC 102 is connected to the PCB board 103. First bonding adhesive 200: Used for bonding touch modules and display modules; Display module 300.
[0037] The touch module includes a cover plate 130 and a second adhesive 120 for bonding the cover plate. The cover plate is either a flexible cover plate or a rigid cover plate. Preferably, the cover plate is a flexible cover plate, using an AG base film or a hardened base film, with a hardness of at least 3H. The black border is located on the upper or lower surface of the cover plate (e.g., Figure 7 (As shown).
[0038] The total thickness of the touch module and the first adhesive does not exceed 0.65 mm.
[0039] The black border is formed by printing with black ink or by pasting with black adhesive material. The width of the black border is 0.1-40mm. The thickness of the black border formed by black ink does not exceed 30μm, and the thickness of the black border formed by black adhesive material does not exceed 100μm.
[0040] The base film is a functionalized base film, and the functionalization method includes one or more of anti-glare, anti-fingerprint, anti-reflection, hardening, and anti-reflection. The functionalized layer is located on the non-conductive surface of the base film.
[0041] The flexible cover of the touch module uses a functionalized film. The functionalization methods include one or more of anti-glare, anti-fingerprint, anti-reflection, hardening, and anti-reflection. The functionalized layer is located on the side of the flexible cover away from the display module.
[0042] The touch display module has a size of 1-150 inches.
[0043] For any content not described in detail in this utility model, conventional technical knowledge in the field can be used.
[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solution of this utility model do not depart from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A touch display module of an OFS structure, characterized in that, At least including: Touch module: The touch module is a flexible touch module, including a base film and a touch functional layer. The touch functional layer includes a first touch electrode, an insulating layer, and a second touch electrode stacked sequentially. The base film is one of the following: anti-glare, anti-reflection, anti-fingerprint, and hardened base film, with a hardness of at least 1H. A black border is provided around the touch module, and the black border is located on the upper or lower surface of the touch module. The touch module includes an FPC, and the touch chip and its peripheral circuits of the touch module are located on the FPC, or the touch chip and its peripheral circuits are located on a PCB board, and the FPC is connected to the PCB board. First bonding adhesive: used for bonding touch modules and display modules; Display module. 2.The touch display module with OFS structure of claim 1, wherein, The touch module includes a cover plate and a second adhesive for bonding the cover plate, wherein the cover plate is either a flexible cover plate or a rigid cover plate; when the touch module includes a cover plate, the black border is located on the upper or lower surface of the cover plate. 3.The touch display module with OFS structure of claim 1, wherein, The total thickness of the touch module and the first adhesive does not exceed 0.65 mm.
4. The OFS structure touch display module according to claim 1, characterized in that, The black border is formed by printing with black ink or by pasting with black adhesive material. The width of the black border is 0.1-40mm. The thickness of the black border formed by black ink does not exceed 30μm, and the thickness of the black border formed by black adhesive material does not exceed 100μm.
5. The OFS structure touch display module according to claim 1, characterized in that, The touch function layer is disposed on the upper and lower surfaces of the base film; when the touch function layer is disposed on the upper surface of the base film, the touch module also includes a cover plate and a second adhesive for bonding the cover plate.
6. The OFS structure touch display module according to claim 2, characterized in that, The flexible cover plate uses a functionalized film, and the functionalization methods include one of anti-glare, anti-fingerprint, anti-reflection, hardening, and anti-reflection. The functionalized layer is located on the side of the flexible cover plate away from the display module.
7. A touch display module with an OFS structure according to any one of claims 1-6, characterized in that, The touch display module has a size of 1-150 inches.