Strong electromagnetic interference resistant capacitive touch screen

Abstract

The utility model relates to the technical field of capacitive touch screens, in particular to a strong electromagnetic interference resistant capacitive touch screen, which adopts the technical scheme that the strong electromagnetic interference resistant capacitive touch screen comprises a display screen component, a front shielding shell component and a rear shielding shell component, the front end and the rear end of the display screen assembly are respectively provided with a front shielding shell assembly and a rear shielding shell assembly. According to the utility model, the combination of the front shielding dustproof shell, the rear shielding dustproof shell and the electromagnetic shielding frame is matched with the electromagnetic shielding plate, so that the electromagnetic interference protection function on the circuit board is realized; and the signal anti-interference performance of an electronic component in a strong electromagnetic interference environment is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of capacitive touch screen, specifically relates to the capacitive touch screen of strong electromagnetic interference resistance. BACKGROUND

[0002] Capacitive touch screen is developed under the driving of the demand of modern electronic equipment wide application, along with the popularity of smart mobile phone, tablet computer and other portable equipment, people's demand for more convenient and intuitive man-machine interaction mode is increasing, capacitive touch screen gradually becomes the mainstream with its high sensitivity, smooth operation and other advantages.

[0003] In the strong electromagnetic interference environment, this working mechanism faces severe challenges, strong electromagnetic interference can produce additional electric field and magnetic field, interfere with the original stable capacitance value detection of capacitive touch screen, which leads to the data transmission and data processing of capacitive screen in the strong electromagnetic interference environment, on the one hand, the interference signal can be misjudged as touch signal, thus producing wrong input instruction, on the other hand, strong electromagnetic interference can also affect the normal transmission of data in transmission line, cause data loss or error, these errors not only seriously affect the user's experience, but also can bring serious safety hazard and economic loss in some operation accuracy requirement high scene, such as industrial control, medical equipment and other fields.

[0004] Therefore, in view of the above-mentioned existing capacitive touch screen, because its strong electromagnetic interference performance is low, the data transmission and data processing of capacitive screen in the strong electromagnetic interference environment are prone to errors, an anti-strong electromagnetic interference capacitive touch screen can be designed. INVENTION CONTENTS

[0005] In order to overcome the problem that the existing capacitive touch screen is prone to errors in data transmission and data processing in the strong electromagnetic interference environment because of its low strong electromagnetic interference performance.

[0006] The technical scheme of the utility model is: the capacitive touch screen of strong electromagnetic interference resistance, including display screen assembly, still including front shielding shell assembly, rear shielding shell assembly, the front and rear ends of display screen assembly are provided with front shielding shell assembly, rear shielding shell assembly respectively, display screen assembly includes capacitive touch screen, electromagnetic shielding plate, front shielding shell assembly includes front shielding dustproof shell, protection film, rear shielding shell assembly includes electromagnetic shielding frame, rear shielding dustproof shell, circuit board, shock pad, control button, multi-hole heat dissipation groove.

[0007] Preferably, the electromagnetic interference protection function of the circuit board is realized by the combination of the front shielding dustproof shell, the rear shielding dustproof shell and the electromagnetic shielding frame and the electromagnetic shielding plate, the signal anti-interference performance of the electronic components in the strong electromagnetic interference environment is greatly improved, and the problem that data transmission and data processing of the capacitive screen in the strong electromagnetic interference environment are prone to errors due to the low strong electromagnetic interference performance of the capacitive touch screen is solved.

[0008] Preferably, the rear end of the capacitive touch screen is provided with an electromagnetic shielding plate, and the electromagnetic shielding plate is fixedly connected with the capacitive touch screen; the front end of the capacitive touch screen is provided with a front shielding dustproof shell; and the inside of the front shielding dustproof shell is provided with a protective film.

[0009] Preferably, the rear end of the electromagnetic shielding plate is provided with an electromagnetic shielding frame; the rear end of the electromagnetic shielding frame is provided with a rear shielding dustproof shell, and the rear shielding dustproof shell is integrally formed with the electromagnetic shielding frame.

[0010] Preferably, the inside of the rear shielding dustproof shell is provided with a circuit board, and the wire of the capacitive touch screen is arranged to be electrically connected with the circuit board through the electromagnetic shielding plate.

[0011] Preferably, the two sides of the circuit board are provided with shock-absorbing pads, the shock-absorbing pads are fixedly connected with the electromagnetic shielding frame, and the shock-absorbing pads are arranged on the two sides of the rear end of the electromagnetic shielding plate.

[0012] Preferably, the shell of the circuit board is fixedly connected with the rear shielding dustproof shell through a screw rod; the electromagnetic shielding frame is fixedly connected with the front shielding dustproof shell through a screw; the two sides of the rear end of the electromagnetic shielding frame are provided with control buttons, and the control buttons are in information intercommunication connection with the circuit board.

[0013] Preferably, the upper end and the lower end of the rear shielding dustproof shell are provided with porous heat dissipation grooves, and the porous heat dissipation grooves are integrally formed with the rear shielding dustproof shell.

[0014] The capacitive touch screen has the advantages that:

[0015] The capacitive touch screen has the advantages that: the electromagnetic interference protection function of the circuit board is realized by the combination of the front shielding dustproof shell, the rear shielding dustproof shell and the electromagnetic shielding frame and the electromagnetic shielding plate, the signal anti-interference performance of the electronic components in the strong electromagnetic interference environment is greatly improved, and the problem that data transmission and data processing of the capacitive screen in the strong electromagnetic interference environment are prone to errors due to the low strong electromagnetic interference performance of the capacitive touch screen is solved.

[0016] By controlling the setting of the control button, the design of the back structure of the control button, the influence of the front strong electromagnetic interference is effectively avoided, and the electrical connection stability during the control of the electric control button is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A whole three-dimensional structure schematic diagram of the anti-strong electromagnetic interference capacitive touch screen is shown.

[0018] Figure 2 A whole back three-dimensional structure schematic diagram of the anti-strong electromagnetic interference capacitive touch screen is shown.

[0019] Figure 3 A whole explosion three-dimensional structure schematic diagram of the anti-strong electromagnetic interference capacitive touch screen is shown.

[0020] Figure 4 A whole cross-sectional three-dimensional structure schematic diagram of the anti-strong electromagnetic interference capacitive touch screen is shown.

[0021] The marks in the drawings are: 1, display screen assembly; 2, front shielding shell assembly; 3, rear shielding shell assembly; 101, capacitive touch screen; 102, electromagnetic shielding plate; 201, front shielding dustproof shell; 202, protective film; 301, electromagnetic shielding frame; 302, rear shielding dustproof shell; 303, circuit board; 304, shock pad; 305, control button; 306, porous heat dissipation groove. DETAILED DESCRIPTION

[0022] The utility model is further explained in connection with the drawings and examples.

[0023] Please refer to Figures 1-4 The utility model provides an example: anti-strong electromagnetic interference capacitive touch screen, including display screen assembly 1 still including front shielding shell assembly 2, rear shielding shell assembly 3, the front and rear ends of display screen assembly 1 are provided with front shielding shell assembly 2, rear shielding shell assembly 3 respectively, display screen assembly 1 includes capacitive touch screen 101, electromagnetic shielding plate 102, front shielding shell assembly 2 includes front shielding dustproof shell 201, protective film 202, rear shielding shell assembly 3 includes electromagnetic shielding frame 301, rear shielding dustproof shell 302, circuit board 303, shock pad 304, control button 305, porous heat dissipation groove 306.

[0024] Please refer to Figures 1-4In the embodiment, the rear end of the capacitive touch screen 101 is provided with an electromagnetic shielding plate 102, and the electromagnetic shielding plate 102 is fixedly connected with the capacitive touch screen 101; the front end of the capacitive touch screen 101 is provided with a front shielding dustproof shell 201; the inside of the front shielding dustproof shell 201 is provided with a protective film 202; the rear end of the electromagnetic shielding plate 102 is provided with an electromagnetic shielding frame 301; the rear end of the electromagnetic shielding frame 301 is provided with a rear shielding dustproof shell 302, and the rear shielding dustproof shell 302 is integrally formed with the electromagnetic shielding frame 301; the inside of the rear shielding dustproof shell 302 is provided with a circuit board 303, and the wire of the capacitive touch screen 101 passes through the electromagnetic shielding plate 102 and is electrically connected with the circuit board 303; both sides of the circuit board 303 are provided with shock-absorbing pads 304, the shock-absorbing pads 304 are fixedly connected with the electromagnetic shielding frame 301, and the shock-absorbing pads 304 are arranged on both sides of the rear end of the electromagnetic shielding plate 102; the shell of the circuit board 303 is fixedly connected with the rear shielding dustproof shell 302 through a screw rod; the electromagnetic shielding frame 301 is fixedly connected with the front shielding dustproof shell 201 through a screw; the rear end of both sides of the electromagnetic shielding frame 301 is provided with a control button 305, and the control button 305 is in information intercommunication connection with the circuit board 303; both ends of the rear shielding dustproof shell 302 are provided with a multi-hole heat dissipation groove 306, and the multi-hole heat dissipation groove 306 is integrally formed with the rear shielding dustproof shell 302.

[0025] In the working process, the electromagnetic interference protection function of the circuit board 303 is realized by the combination of the front shielding dustproof shell 201, the rear shielding dustproof shell 302 and the electromagnetic shielding frame 301 cooperating with the electromagnetic shielding plate 102, which greatly improves the signal anti-interference performance of the electronic components in the strong electromagnetic interference environment; and the problem that the data transmission and data processing of the capacitive screen are prone to errors in the strong electromagnetic interference environment is solved.

[0026] Then, the design of the back structure of the control button 305 effectively avoids the influence of strong electromagnetic interference on the front, and improves the electrical connection stability during the control of the electric control button.

[0027] Through the above steps, the electromagnetic interference protection function of the circuit board 303 is realized by the combination of the front shielding dustproof shell 201, the rear shielding dustproof shell 302 and the electromagnetic shielding frame 301 cooperating with the electromagnetic shielding plate 102, which greatly improves the signal anti-interference performance of the electronic components in the strong electromagnetic interference environment, and avoids the problem that the data transmission and data processing of the capacitive screen are prone to errors in the strong electromagnetic interference environment because the capacitive touch screen 101 has low performance for strong electromagnetic interference.

[0028] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A capacitive touchscreen resistant to strong electromagnetic interference, comprising a display assembly (1), characterized in that: It also includes a front shielding housing assembly (2) and a rear shielding housing assembly (3); the front and rear ends of the display assembly (1) are respectively provided with a front shielding housing assembly (2) and a rear shielding housing assembly (3); the display assembly (1) includes a capacitive touch screen (101) and an electromagnetic shielding plate (102); the front shielding housing assembly (2) includes a front shielding dustproof housing (201) and a protective film (202); the rear shielding housing assembly (3) includes an electromagnetic shielding frame (301), a rear shielding dustproof housing (302), a circuit board (303), a shock-absorbing pad (304), control buttons (305), and a multi-hole heat dissipation groove (306).

2. The anti-strong electromagnetic interference capacitive touchscreen according to claim 1, characterized in that: An electromagnetic shielding plate (102) is provided at the rear end of the capacitive touch screen (101), and the electromagnetic shielding plate (102) is fixedly connected to the capacitive touch screen (101); a front shielding dustproof shell (201) is provided at the front end of the capacitive touch screen (101); a protective film (202) is provided inside the front shielding dustproof shell (201).

3. The anti-strong electromagnetic interference capacitive touchscreen according to claim 2, characterized in that: An electromagnetic shielding frame (301) is provided at the rear end of the electromagnetic shielding plate (102); a rear shielding dustproof shell (302) is provided at the rear end of the electromagnetic shielding frame (301), and the rear shielding dustproof shell (302) and the electromagnetic shielding frame (301) are integrally formed.

4. The anti-strong electromagnetic interference capacitive touchscreen according to claim 3, characterized in that: The rear dustproof housing (302) contains a circuit board (303), and the ribbon cable of the capacitive touch screen (101) passes through the electromagnetic shielding plate (102) and is electrically connected to the circuit board (303).

5. The anti-strong electromagnetic interference capacitive touchscreen according to claim 4, characterized in that: Both sides of the circuit board (303) are provided with shock-absorbing pads (304), and the shock-absorbing pads (304) are fixedly connected to the electromagnetic shielding frame (301). The shock-absorbing pads (304) are provided on both sides of the rear end face of the electromagnetic shielding plate (102).

6. The anti-strong electromagnetic interference capacitive touchscreen according to claim 4, characterized in that: The outer shell of the circuit board (303) is fixedly connected to the rear shielding dustproof shell (302) by screws; the electromagnetic shielding frame (301) is fixedly connected to the front shielding dustproof shell (201) by screws; control buttons (305) are provided on both rear ends of the electromagnetic shielding frame (301), and the control buttons (305) are interconnected with the circuit board (303).

7. The anti-strong electromagnetic interference capacitive touchscreen according to claim 3, characterized in that: Both ends of the rear shielding dustproof housing (302) are provided with perforated heat dissipation grooves (306), and the perforated heat dissipation grooves (306) are integrally formed with the rear shielding dustproof housing (302).

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