Capacitive touch screen structure with anti-interference function

Abstract

The utility model relates to the technical field of capacitive touch screens, in particular to a capacitive touch screen structure with an anti-interference function, which comprises a frame body, a clamping plate is fixedly mounted on one side of the frame body, a clamping groove is arranged on the clamping plate, an overflow groove is arranged on one side of the frame body close to the clamping plate, and the overflow groove is communicated with the clamping plate. Tempered glass is fixedly installed on the side, away from the overflow groove, of the frame body, an insulating film is fixedly installed at the joint of the tempered glass and the frame body, a display mechanism is arranged in the frame body and comprises first OCA, the first OCA is fixedly installed in the frame body, the tempered glass is fixedly installed on one side of the first OCA, and the second OCA is fixedly installed on the other side of the frame body. Impedance loss is reduced through the ITO layer assembly, backlight energy consumption is reduced through the light guide plate, the overall service life is prolonged through self-repairing of the self-repairing insulating layer, the dynamic shielding film, the self-repairing insulating layer and the metal back plate are integrated through the OCA glue assembly to be grounded in a multi-point mode, triple anti-interference protection is achieved, and the service life is prolonged. And the touch precision and the display stability are still kept in a complex electromagnetic environment.

Description

Technical Field

[0001] This utility model relates to the field of capacitive touch screen technology, specifically a capacitive touch screen structure with anti-interference function. Background Technology

[0002] Capacitive touchscreens work by sensing the electrical current of the human body. They consist of a glass panel and an ITO conductive layer. They are divided into surface type (single-point touch, used in ATMs, etc.) and projected type (multi-point touch, commonly used in mobile phones / tablets). They have the advantages of high sensitivity and durability, but require direct finger contact and are relatively expensive.

[0003] However, existing capacitive touchscreens can cause screen jumps and program errors in complex electromagnetic environments, which can have a significant impact on their use. Utility Model Content

[0004] The purpose of this invention is to provide a capacitive touchscreen structure with anti-interference function to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A capacitive touchscreen structure with anti-interference function includes a frame, a card plate fixedly installed on one side of the frame, a card slot formed on the card plate, an overflow groove formed on the side of the frame near the card plate, tempered glass fixedly installed on the side of the frame away from the overflow groove, an insulating film fixedly installed at the connection between the tempered glass and the frame, and a display mechanism disposed inside the frame. The display mechanism includes a first OCA adhesive, which is fixedly installed inside the frame, and tempered glass fixedly installed on one side of the first OCA adhesive.

[0007] Preferably, the display mechanism further includes a first ITO layer, which is fixedly installed on one side of the first OCA adhesive, and a self-healing insulating layer is fixedly installed on the side of the first ITO layer away from the first OCA adhesive.

[0008] Preferably, a second ITO layer is fixedly installed on the side of the self-healing insulating layer away from the first ITO layer, and a second OCA adhesive is fixedly installed on the side of the second ITO layer away from the self-healing insulating layer.

[0009] Preferably, a filter is fixedly installed on the side of the second OCA adhesive away from the self-healing insulating layer, and a front polarizer is fixedly installed on the side of the filter away from the second OCA adhesive.

[0010] Preferably, a liquid crystal layer is fixedly mounted on the side of the front polarizer away from the filter, and a TFT glass is fixedly mounted on the side of the liquid crystal layer away from the front polarizer.

[0011] Preferably, a rear polarizer is fixedly installed on the side of the TFT glass away from the liquid crystal layer, a light guide plate is fixedly installed on the side of the rear polarizer away from the TFT glass, and a reflective sheet is fixedly installed on the side of the light guide plate away from the rear polarizer.

[0012] Preferably, a metal back plate is fixedly installed on the side of the reflector away from the light guide plate, and a touch controller is fixedly installed on the side of the metal back plate away from the reflector.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The capacitive touch screen structure with anti-interference function reduces impedance loss through the first ITO layer and the second ITO layer, reduces backlight energy consumption through the light guide plate, and extends the overall service life through the self-healing structure of the self-healing insulating layer.

[0015] 2. This capacitive touchscreen structure with anti-interference function integrates a dynamic shielding film, a self-healing insulating layer, and a metal backplate with multi-point grounding through the first and second OCA adhesives to achieve triple anti-interference protection. It maintains touch accuracy and display stability in complex electromagnetic environments and completes reliable interaction across the entire chain from fingertip touch to image response. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the frame of this utility model;

[0018] Figure 3 This is a schematic diagram of the display mechanism of this utility model;

[0019] Figure 4 This utility model Figure 2 Enlarged diagram of point A in the middle.

[0020] In the diagram: 101, frame; 102, card plate; 103, card slot; 104, overflow groove; 105, tempered glass; 106, insulating film; 201, display mechanism; 203, first OCA adhesive; 204, first ITO layer; 205, self-healing insulating layer; 206, second ITO layer; 301, filter; 302, front polarizer; 303, liquid crystal layer; 304, TFT glass; 305, rear polarizer; 306, light guide plate; 401, reflector; 403, metal backplate; 404, touch controller; 405, second OCA adhesive. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4 As shown, this utility model provides a technical solution:

[0023] A capacitive touchscreen structure with anti-interference function includes a frame 101. A card plate 102 is fixedly installed on one side of the frame 101. A card slot 103 is formed on the card plate 102. An overflow groove 104 is formed on the side of the frame 101 near the card plate 102. A tempered glass 105 is fixedly installed on the side of the frame 101 away from the overflow groove 104. An insulating film 106 is fixedly installed at the connection between the tempered glass 105 and the frame 101. A display mechanism 201 is provided inside the frame 101. The display mechanism 201 includes a first OCA adhesive 203, which is fixedly installed inside the frame 101. The tempered glass 105 is fixedly installed on one side of the first OCA adhesive 203.

[0024] The above solution allows for the installation and protection of the screen structure through the frame, the slots created by the card plate to facilitate frame assembly, the overflow channel to allow adhesive to overflow and prevent it from flowing onto the screen structure, the insulating film to prevent interference signals from being transmitted to the tempered glass, the tempered glass to protect the screen structure, and the first OCA adhesive to bond the tempered glass and the screen structure. Furthermore, the integrated electronically controlled liquid crystal film dynamically switches between transparent and shielded modes to suppress EMI.

[0025] In this embodiment, preferably, the display mechanism 201 further includes a first ITO layer 204, which is fixedly installed on one side of the first OCA adhesive 203, and a self-healing insulating layer 205 is fixedly installed on the side of the first ITO layer 204 away from the first OCA adhesive 203.

[0026] The above scheme improves signal attenuation resistance by using the first ITO layer of the driving electrode made of graphene-ITO composite material. The self-healing insulating layer can isolate the first ITO layer and the second ITO layer, and can automatically repair itself after damage to enhance ESD protection.

[0027] In this embodiment, preferably, a second ITO layer 206 is fixedly installed on the side of the self-healing insulating layer 205 away from the first ITO layer 204, and a second OCA adhesive 405 is fixedly installed on the side of the second ITO layer 206 away from the self-healing insulating layer 205.

[0028] The above scheme, through the composite electrode second ITO layer composed of graphene-ITO and a ring-shaped grounding protection ring, can capture the electric field distortion signal generated by finger touch, while the protection ring can absorb edge electric field interference.

[0029] In this embodiment, preferably, a filter 301 is fixedly installed on the side of the second OCA adhesive 405 away from the self-healing insulating layer 205, and a front polarizer 302 is fixedly installed on the side of the filter 301 away from the second OCA adhesive 405.

[0030] The above solution allows for the bonding of the touch component and the display component using a second OCA adhesive. It also integrates an electro-controlled liquid crystal film that dynamically switches between transparent and shielded modes to suppress EMI, ensuring a seamless connection between the touch component and the display component. RGB colors can be generated using a filter, the polarization direction of incident light can be controlled using a front polarizer, and an anti-glare coating reduces ambient light reflection.

[0031] In this embodiment, preferably, a liquid crystal layer 303 is fixedly installed on the side of the front polarizer 302 away from the filter 301, and a TFT glass 304 is fixedly installed on the side of the liquid crystal layer 303 away from the front polarizer 302.

[0032] The above scheme enables image display by controlling the amount of light transmitted through molecular deflection in the liquid crystal layer. The liquid crystal can be driven by TFT glass, and the internal ITO + metal mesh dual shielding suppresses broadband noise.

[0033] In this embodiment, preferably, a rear polarizer 305 is fixedly installed on the side of the TFT glass 304 away from the liquid crystal layer 303, a light guide plate 306 is fixedly installed on the side of the rear polarizer 305 away from the TFT glass 304, and a reflector 401 is fixedly installed on the side of the light guide plate 306 away from the rear polarizer 305.

[0034] The above solution utilizes a rear polarizer and a front polarizer to form an orthogonal optical switch, enhancing display contrast. A light guide plate purifies the light spectrum, eliminating infrared / ultraviolet stray light interference. A reflective sheet recovers backlight and grounds it, suppressing high-frequency backlight noise.

[0035] In this embodiment, preferably, the reflective sheet 401 has a metal back plate 403 on the side away from the light guide plate 306, and a touch controller 404 is fixedly installed on the side of the metal back plate 403 away from the reflective sheet 401.

[0036] The above solution allows for mechanical support and multi-point grounding via a metal backplate, dissipating electromagnetic interference charges. By integrating quantum dot narrowband filtering into the touch controller, the adsorption characteristics of quantum dot materials for specific high-frequency noise can be utilized to control the touch coordinate calculation error within ±0.1mm.

[0037] In this embodiment, a capacitive touchscreen structure with anti-interference function is used by the user by assembling the tempered glass 105, the frame 101, and the screen structure. After assembly, the touch controller 404 is connected, and the frame 101 is installed using the clip 102 and adhesive applied near the overflow groove 104. During display, the light guide plate 306 is a photonic crystal light guide plate 306 (PC-LGP), which improves the LED backlight refraction efficiency to 98% through a periodic nanostructure. After the light is reused by the reflector 401 with a conductive coating, it passes through the TFT glass 304 with double-layer electromagnetic shielding (ITO + metal mesh). The shielding layer prevents the touch signal from being cross-linked with the liquid crystal driving signal. Interference is reduced by more than 40dB. The liquid crystal molecules in the liquid crystal layer 303 twist their angle under the TFT driving voltage, and together with the front / rear polarizers 305 and the filter 301, pixel-level light intensity modulation is completed. Finally, the image is output through the dynamic shielding film integrated in the second OCA adhesive 405. This film layer dynamically adjusts its working state according to the ambient electromagnetic field strength: it switches to shielding mode when the EMI strength exceeds 10V / m, maintains 90% light transmittance under normal conditions to ensure display clarity, and can switch to low reflection mode in strong light environment to improve visibility. When a finger touches the surface of the tempered glass 105, the high-frequency electric field signal emitted by the first ITO layer 204 of the driving electrode made of graphene-ITO composite material is interfered with, and the tempered glass 105... The first OCA adhesive 203 below 5 integrates an electronically controlled liquid crystal shielding film that senses environmental electromagnetic noise in real time and adjusts the shielding frequency to suppress external interference such as 5G / Wi-Fi. Subsequently, the electric field distortion signal generated by finger touch penetrates the self-healing insulating layer 205 and is captured by the second ITO layer 206, a composite electrode composed of graphene-ITO and a ring-shaped grounding protection ring. The self-healing insulating layer 205 contains microencapsulated repair agents with self-healing capabilities, which automatically release the repair agents to fill the cracks when damaged. After capturing the electric field distortion signal, the second ITO layer 206 has a protective ring on its structure that eliminates edge touch signals through surrounding grounding. The resulting touch signal is then transmitted to the touch controller 40 via a flexible circuit shielded by a copper mesh. 4. The touch controller 404 integrates a quantum dot noise filter to perform frequency domain purification of the signal. By utilizing the adsorption characteristics of quantum dot materials for specific high-frequency noise, the touch coordinate calculation error is controlled within ±0.1mm. The entire structure reduces impedance loss through graphene-ITO electrodes, reduces backlight power consumption through photonic crystal light guide plate 306, and extends service life through self-healing structure. Furthermore, it achieves triple anti-interference protection through dynamic shielding film (transparent / shielded dual-mode switching), self-healing insulating layer 205 (microcapsule automatic repair), and multi-point grounding of metal back plate 403. It maintains touch accuracy and display stability even in complex electromagnetic environments, completing a reliable interaction from fingertip touch to image response.

[0038] 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 preferred examples and are not intended to limit the 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 claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A capacitive touch screen structure with anti-interference function, characterized in that: Including frame (101), one side fixed mounting of frame (101) has card board (102), card slot (103) is seted up on card board (102), overflow groove (104) is seted up on frame (101) close to card board (102) one side, the toughened glass (105) is fixedly installed on frame (101) away from overflow groove (104) one side, the insulating film (106) is fixedly installed on the junction of toughened glass (105) and frame (101), display mechanism (201) is arranged in frame (101) inside, display mechanism (201) includes first OCA adhesive (203), first OCA adhesive (203) is fixedly installed in frame (101) inside, first OCA adhesive (203) one side fixed mounting has toughened glass (105).

2. The capacitive touch screen structure with anti-interference function according to claim 1, characterized in that: The display mechanism (201) further comprises a first ITO layer (204), the first ITO layer (204) is fixedly installed on the side of the first OCA adhesive (203), and the self-repairing insulation layer (205) is fixedly installed on the side of the first ITO layer (204) away from the first OCA adhesive (203).

3. The capacitive touch screen structure with anti-interference function according to claim 2, characterized in that: The second ITO layer (206) is fixedly installed on the side of the self-repairing insulation layer (205) away from the first ITO layer (204), and the second OCA adhesive (405) is fixedly installed on the side of the second ITO layer (206) away from the self-repairing insulation layer (205).

4. The capacitive touch screen structure with anti-interference function according to claim 3, characterized in that: The second OCA adhesive (405) is fixedly installed on the side of the self-repairing insulation layer (205) away from the first ITO layer (204), and the second OCA adhesive (405) is fixedly installed on the side of the second ITO layer (206) away from the self-repairing insulation layer (205).

5. The capacitive touch screen structure with anti-interference function according to claim 4, characterized in that: The front polaroid (302) is fixedly installed on the side of the filter (301) away from the liquid crystal layer (303), and the TFT glass (304) is fixedly installed on the side of the front polaroid (302) away from the liquid crystal layer (303).

6. The capacitive touch screen structure with anti-interference function according to claim 5, characterized in that: The rear polaroid (305) is fixedly installed on the side of the TFT glass (304) away from the liquid crystal layer (303), the light guide plate (306) is fixedly installed on the side of the rear polaroid (305) away from the TFT glass (304), and the reflective sheet (401) is fixedly installed on the side of the light guide plate (306) away from the rear polaroid (305).

7. The capacitive touch screen structure with anti-interference function according to claim 6, characterized in that: The metal back plate (403) is fixedly installed on the side of the reflective sheet (401) away from the light guide plate (306), and the touch controller (404) is fixedly installed on the side of the metal back plate (403) away from the reflective sheet (401).

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