Anti-interference multi-point touch screen module

Abstract

The invention relates to the technical field of touch screens, in particular to an anti-interference multi-point touch screen module which comprises a touch screen module body and an LCD display panel, the touch screen module body is sequentially provided with a protection layer, a first induction layer, an insulation layer, a second induction layer and a shielding layer, the touch screen module body is further provided with a flexible circuit board, and the first induction layer, the insulation layer, the second induction layer and the shielding layer are sequentially arranged on the flexible circuit board. The flexible circuit board extends to the outside from the bottom of the second induction layer, a driving IC and an electronic component are integrated on the flexible circuit board, a circuit board shielding layer is arranged at the bottom of the flexible circuit board, the LCD display panel is tightly attached to the shielding layer, the shielding layer and the circuit board shielding layer are integrally formed, and the circuit board shielding layer is arranged on the flexible circuit board. A metal frame is arranged on the outer ring of the upper end of the LCD display panel. According to the anti-interference multi-point touch screen module, the circuit board shielding layer and the shielding layer are arranged at the bottom of the flexible circuit board and between the second induction layer and the LCD display panel respectively, so that the anti-interference capability can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of touch screens, and in particular to an anti-interference multi-point touch screen module. Background Art

[0002] A touch screen is an input device that allows users to interact by directly touching the screen surface. It greatly simplifies the human-machine interface, making operations more intuitive and convenient. It is widely used in smart phones, tablets, automatic teller machines (ATMs), information query terminals, industrial control panels, etc. Touch screens include resistive touch screens and capacitive touch screens. Among them, the capacitive touch screen module is mainly composed of a protective layer, a sensing layer, an insulating layer, a flexible circuit board, a control circuit, a backing layer, a display panel, a frame seal, etc. It has high sensitivity, fast response, and a good multi-touch experience.

[0003] Existing capacitive touch screens are susceptible to electromagnetic interference during use, which has an adverse effect on the performance of the touch screen. Usually, a metal frame is used for physical isolation, or an appropriate filtering circuit is added to the signal path, but the structure is complex and the anti-interference effect is poor. Summary of the invention

[0004] The purpose of the present invention is to provide an anti-interference multi-point touch screen module to solve the problem that the touch screen module on the market currently has a complex anti-interference structure but poor anti-interference effect, as mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an anti-interference multi-point touch screen module, comprising a touch screen module body and an LCD display panel, wherein the touch screen module body is provided with a protective layer, a first sensing layer, an insulating layer, a second sensing layer and a shielding layer in sequence, the touch screen module body is also provided with a flexible circuit board, and the flexible circuit board extends from the bottom of the second sensing layer to the outside, a driving IC and electronic components are integrated on the flexible circuit board, and a circuit board shielding layer is provided at the bottom of the flexible circuit board, the LCD display panel is tightly fitted with the shielding layer, and the shielding layer and the circuit board shielding layer are integrally formed, a metal frame is provided on the outer circle of the upper end of the LCD display panel, and a limiting opening corresponding to the position of the flexible circuit board is provided on the metal frame, and a circle of frame sealing layer is provided on the side of the touch screen module body.

[0006] Preferably, the protective layer is made of glass, and a scratch-resistant coating is evenly applied on the protective layer.

[0007] Preferably, the upper end of the anti-scratch coating is smooth and flat, and an anti-fingerprint film is tightly attached above the anti-scratch coating.

[0008] Preferably, a first transparent conductor is disposed at the bottom of the first sensing layer, and Y-axis electrodes are respectively disposed at both ends of the first transparent conductor.

[0009] Preferably, a second transparent conductor is disposed above the second sensing layer, and X-axis electrodes are respectively disposed at both ends of the second transparent conductor.

[0010] Preferably, the first transparent conductor and the second transparent conductor are both made of high-purity indium tin oxide.

[0011] Preferably, an isolation material is provided on the insulating layer, and the isolation material is made of epoxy resin material.

[0012] Preferably, the isolation material corresponds to the positions of the Y-axis electrode and the X-axis electrode respectively.

[0013] Preferably, the size of the protective layer is larger than the size of the LCD display panel, and the bottom of the protective layer is arranged above the metal frame.

[0014] Preferably, a circle of adhesive layer is provided on the upper end of the metal frame, and the adhesive layer is tightly fitted to the protective layer.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the anti-interference multi-point touch screen module can effectively improve the anti-interference ability by respectively setting a circuit board shielding layer and a shielding layer at the bottom of the flexible circuit board and between the second sensing layer and the LCD display panel. The anti-interference multi-point touch screen module makes the touch screen and the display panel fit closely together, reduces the air layer, indirectly improves the anti-interference ability, uses a metal frame for physical shielding, and improves the usability of the touch screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of an anti-interference multi-point touch screen module of the present invention; Figure 2 The present invention is an anti-interference multi-point touch screen module Figure 1 The enlarged structural diagram at A in the middle; Figure 3 An exploded diagram of an anti-interference multi-point touch screen module of the present invention; Figure 4 This is a schematic diagram of the position structure of the insulating layer relative to the first transparent conductor and the second transparent conductor of an anti-interference multi-point touch screen module of the present invention; Figure 5 The present invention is a schematic diagram of an adhesive layer structure of an anti-interference multi-point touch screen module.

[0017] In the figure: 1. touch screen module body; 2. protection layer; 201. anti-fingerprint film; 202. anti-scratch coating; 3. first sensing layer; 301. first transparent conductor; 302. Y-axis electrode; 4. flexible circuit board; 401. driver IC; 402. circuit board shielding layer; 403. electronic components; 5. insulation layer; 501. isolation material; 6. second sensing layer; 601. second transparent conductor; 602. X-axis electrode; 7. shielding layer; 8. LCD display panel; 801. metal frame; 802. limit opening; 9. frame sealing layer; 10. adhesive layer. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-5The present invention provides a technical solution: an anti-interference multi-point touch screen module, comprising a touch screen module body 1 and an LCD display panel 8, wherein a protective layer 2, a first sensing layer 3, an insulating layer 5, a second sensing layer 6 and a shielding layer 7 are sequentially arranged on the touch screen module body 1, the protective layer 2 is made of glass, and an anti-scratch coating 202 is evenly applied on the protective layer 2, and the anti-scratch coating 202 of this structure plays a role of wear resistance and protection, the upper end of the anti-scratch coating 202 is smooth and flat, and an anti-fingerprint film 201 is tightly attached to the top of the anti-scratch coating 202, and the anti-fingerprint film 201 of this structure plays a role of anti-fingerprint, improving the usability of the touch screen module body 1, and a flexible circuit board 4 is also arranged on the touch screen module body 1, and the flexible circuit board 4 is extended from the bottom of the second sensing layer 6 to the bottom of the second sensing layer 6. Extending to the outside, a first transparent conductor 301 is provided at the bottom of the first sensing layer 3, and Y-axis electrodes 302 are respectively provided at both ends of the first transparent conductor 301. In this structure, the first sensing layer 3 and the second sensing layer 6 constitute a double-layer design. The first sensing layer 3 and the second sensing layer 6 play the role of capacitive touch sensing, and the main function is to detect and locate the user's touch operation to achieve multi-point touch. At the same time, the double-layer design can play a better anti-interference role. A second transparent conductor 601 is provided above the second sensing layer 6, and X-axis electrodes 602 are respectively provided at both ends of the second transparent conductor 601. In this structure, the first sensing layer 3 and the second sensing layer 6 are aligned to avoid the problem of inaccurate touch response. The sensing layer matches the visible area size of the LCD display panel 8 to ensure the touch function. The entire display area can be covered. The first transparent conductor 301 and the second transparent conductor 601 are both made of high-purity indium tin oxide. The indium tin oxide of this structure has the advantages of being transparent and having good conductivity. The driving IC 401 and the electronic components 403 are integrated on the flexible circuit board 4. The driving IC 401 and the electronic components 403 play the role of signal processing and data transmission. A circuit board shielding layer 402 is provided at the bottom of the flexible circuit board 4. The LCD display panel 8 and the shielding layer 7 are tightly fitted, and the shielding layer 7 and the circuit board shielding layer 402 are integrally formed. The shielding layer 7 and the circuit board shielding layer 402 are metal meshes, which can be well grounded. An isolation material 501 is provided on the insulating layer 5, and the isolation material 501 is made of epoxy resin material. The structure makes the isolation material 501 have insulation performance. The insulation layer 5 is located between the first transparent conductor 301 and the second transparent conductor 601 to ensure the insulation treatment between the first sensing layer 3 and the second sensing layer 6. The isolation material 501 corresponds to the Y-axis electrode 302 and the X-axis electrode 602 respectively. This structure prevents the Y-axis electrode 302 and the X-axis electrode 602 from directly contacting each other, thereby avoiding the problem of short circuit between different conductive layers. A metal frame 801 is provided on the outer circle of the upper end of the LCD display panel 8, and a limiting opening 802 corresponding to the position of the flexible circuit board 4 is provided on the metal frame 801. A circle of frame sealing layer 9 is provided on the side of the touch screen module body 1. The frame sealing layer 9 plays a role of side sealing protection and achieves the purpose of reducing noise.The size of the protective layer 2 is larger than that of the LCD display panel 8, and the bottom of the protective layer 2 is arranged above the metal frame 801. This structure is externally protected by the protective layer 2 and is used for touch. The anti-fingerprint film 201 plays an anti-fingerprint role, and the anti-scratch coating 202 plays a wear-resistant protection role. A circle of adhesive layer 10 is arranged on the upper end of the metal frame 801, and the adhesive layer 10 is tightly attached to the protective layer 2. This structure allows the touch screen module body 1 to be between the protective layer 2 and the protective structure of the metal frame 801. The metal frame 801 also plays a role of physical isolation, which can block some external electromagnetic interference.

[0020] Working principle: When using the anti-interference multi-point touch screen module, first, the touch screen module body 1 is composed of a protective layer 2, a first sensing layer 3, a flexible circuit board 4, an insulating layer 5, a second sensing layer 6 and a shielding layer 7. The protective layer 2 is treated with a scratch-resistant coating 202 for wear resistance and scratch resistance. The anti-fingerprint film 201 plays an anti-fingerprint role. The first sensing layer 3 and the second sensing layer 6 are respectively formed by a first transparent conductor 301 and a second transparent conductor 601 to form a conductor structure. The Y-axis electrode 302 and the X-axis electrode 602 are prevented from direct contact by an isolation material 501. A circuit board shielding layer 402 formed integrally with the shielding layer 7 is provided at the bottom of the flexible circuit board 4 to improve the anti-interference shielding effect. At the same time, the circuit board shielding layer 402 and the shielding layer 7 can be safely grounded. The adhesive layer 10 is connected to the shielding layer 7. The protective layer 2 and the metal frame 801 are tightly connected, the LCD display panel 8 is used for the overall positioning of the touch screen module body 1, the metal frame 801 plays a role in physical anti-interference, the frame sealing layer 9 provides a sealing protection between the touch screen module body 1 and the metal frame 801, and the limiting opening 802 allows the flexible circuit board 4 to extend to the outside so that the flexible circuit board 4 can connect the touch screen sensor and the controller IC on the main board, and cooperate with the control circuit. The control circuit is responsible for processing data from the touch screen, calculating the precise touch position, and passing the information to the processor of the device. The controller IC is also responsible for executing the multi-touch algorithm and filtering out interference such as noise. The driver IC 401 and the electronic components 403 are used for signal processing and data transmission, thereby completing a series of tasks.

[0021] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-interference multi-point touch screen module, comprising a touch screen module body (1) and an LCD display panel (8), characterized in that: The touch screen module body (1) is provided with a protective layer (2), a first sensing layer (3), an insulating layer (5), a second sensing layer (6) and a shielding layer (7) in sequence. The touch screen module body (1) is also provided with a flexible circuit board (4), and the flexible circuit board (4) extends from the bottom of the second sensing layer (6) to the outside. The flexible circuit board (4) is integrated with a driver IC (401) and electronic components (403), and a circuit board shielding layer (402) is provided at the bottom of the flexible circuit board (4). The LCD display panel (8) is tightly fitted with the shielding layer (7), and the shielding layer (7) and the circuit board shielding layer (402) are integrally formed. A metal frame (801) is provided on the outer ring of the upper end of the LCD display panel (8), and a limit opening (802) corresponding to the position of the flexible circuit board (4) is provided on the metal frame (801). A circle of frame sealing layer (9) is provided on the side of the touch screen module body (1).

2. The anti-interference multi-point touch screen module according to claim 1, characterized in that: The protective layer (2) is made of glass, and a scratch-resistant coating (202) is evenly applied on the protective layer (2).

3. The anti-interference multi-point touch screen module according to claim 2, characterized in that: The upper end of the anti-scratch coating (202) is smooth and flat, and an anti-fingerprint film (201) is tightly attached to the top of the anti-scratch coating (202).

4. The anti-interference multi-point touch screen module according to claim 1, characterized in that: A first transparent conductor (301) is provided at the bottom of the first sensing layer (3), and two ends of the first transparent conductor (301) are respectively provided with Y-axis electrodes (302).

5. The anti-interference multi-point touch screen module according to claim 4, characterized in that: A second transparent conductor (601) is provided above the second sensing layer (6), and X-axis electrodes (602) are respectively provided at two ends of the second transparent conductor (601).

6. The anti-interference multi-point touch screen module according to claim 5, characterized in that: The first transparent conductor (301) and the second transparent conductor (601) are both made of high-purity indium tin oxide.

7. The anti-interference multi-point touch screen module according to claim 6, characterized in that: An isolation material (501) is provided on the insulating layer (5), and the isolation material (501) is made of epoxy resin material.

8. The anti-interference multi-point touch screen module according to claim 7, characterized in that: The isolation material (501) corresponds to the positions of the Y-axis electrode (302) and the X-axis electrode (602) respectively.

9. The anti-interference multi-point touch screen module according to claim 1, characterized in that: The size of the protective layer (2) is larger than the size of the LCD display panel (8), and the bottom of the protective layer (2) is arranged above the metal frame (801).

10. The anti-interference multi-point touch screen module according to claim 9, characterized in that: A circle of adhesive layer (10) is provided on the upper end of the metal frame (801), and the adhesive layer (10) is tightly attached to the protective layer (2).

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