Electromagnetic shielding and sealing structure and method of display screen with external touch screen

An electromagnetic shielding and sealing structure technology, which is applied in the fields of magnetic field/electric field shielding, electrical components, instruments, etc., can solve the problems that the touch screen cannot increase the compression structure, cannot be applied to the external touch screen, and the shielding performance is reduced, so as to reduce the difficulty of installation and operation, Satisfy the effect of preventing rain and improving reliability

Active Publication Date: 2022-07-19
SHANDONG CHAOYUE DATA CONTROL ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shielding method of the touch screen itself is mentioned in the above patents, but the patents CN201110393137.4 and CN201510493246.1 do not specify how to install it. Although the installation structure is mentioned in the patent CN201510509848.1, it is limited to the installation of the built-in touch screen and cannot be applied external touch screen
To sum up, the shielding treatment of the traditional external touch screen is to paste a conductive shielding film on the contact surface between the inside of the touch screen and the case, so that it overlaps with the case to form a shield. The shielding performance depends on the lapping effect. The smaller the resistance, the better the shielding effect. , but the external touch screen cannot increase the compression structure, and can only be installed by bonding, which can easily cause poor conductive contact and reduce the shielding performance. At present, there is no good solution

Method used

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  • Electromagnetic shielding and sealing structure and method of display screen with external touch screen
  • Electromagnetic shielding and sealing structure and method of display screen with external touch screen
  • Electromagnetic shielding and sealing structure and method of display screen with external touch screen

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Embodiment Construction

[0033] Attached below figure 1 to the attached Figure 4 The present invention will be further described.

[0034] A method for electromagnetic shielding and sealing of a display screen with an external touch screen, comprising the following steps:

[0035] a) Paste a layer of shielding film 2 on the LCD screen 1, and there is no gap between the shielding film 2 and the LCD screen 1;

[0036] b) Paste a layer of anti-reflection film 3 on the shielding film 2. The size of the anti-reflection film 3 is smaller than the size of the shielding film 2. After the anti-anti-reflection film 3 is pasted, a circle of bare circles is formed on the periphery of the shielding film 2. conductive surface;

[0037] c) Paste a circle of conductive foam 4 on the exposed conductive surface of the shielding film 2;

[0038] d) The liquid crystal screen 1 is placed in the inner cavity of the lower end of the casing 5, the pressing force generated by the pressing device acts on the reverse side ...

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Abstract

An electromagnetic shielding and sealing structure and method for a display screen with an external touch screen. The conductive foam on the liquid crystal screen and the casing are conductively overlapped with each other. After receiving the pressing force of a pressing device, the conductive foam is Compression deformation, so that the shielding film forms a good overlap with the casing through the conductive foam, and the shielding film forms a complete electromagnetic shielding isolation layer for the LCD screen through the overlapping of the conductive foam and the casing, and the external touch screen or glass plate passes through The method of pasting is fixedly connected to the casing to achieve sealing. By treating the electromagnetic shielding and sealing separately, the difficulty of installation and operation can be reduced, and the reliability of the electromagnetic shielding and sealing of the display screen with the external touch screen can be improved. It can better meet the requirements of electromagnetic compatibility in the national military standard and meet the needs of rain protection.

Description

technical field [0001] The invention relates to the technical field of touch display screens, in particular to an electromagnetic shielding and sealing structure and method of a display screen with an external touch screen. Background technique [0002] In order to better meet the needs of operation and use, touch screens are widely used in human-computer interaction devices, especially external touch screens are widely used as display control devices because of their flat structure and beautiful appearance. For strengthening computer products, it is necessary to meet the requirements of the harsher electromagnetic compatibility environment, and ordinary touch screens cannot meet the needs. To this end, patent CN201110393137.4 mentioned a resistive touch screen, which meets the electromagnetic compatibility requirements by adding shielding glass inside the touch screen and combining filter circuits; patent CN201510493246.1 mentioned a touch screen with shielding function and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1333H05K9/00
CPCG02F1/1333G02F1/133308G02F1/13338H05K9/0054G02F1/133311G02F1/133334
Inventor 李义臣夏峰王雪
Owner SHANDONG CHAOYUE DATA CONTROL ELECTRONICS CO LTD
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