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Electronic equipment with electro-magnetic shielding function

An electronic equipment and electromagnetic shielding technology, which is applied in the fields of magnetic field/electric field shielding, color TV parts, TV system parts, etc., can solve problems such as electromagnetic wave leakage, poor shielding effect, and affecting the performance of the whole machine. Effects of low cost and improved EMC performance

Active Publication Date: 2010-06-23
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the existence of opening slots, some electromagnetic waves are still leaked to the outside of the shielding shell, which affects the EMC performance of the whole machine
In addition, the reference ground of the external circuit board and the reference ground of the signal processing circuit board are connected by a long wire, and a certain impedance will be generated between the two reference grounds, and its resistance value is equal to the resistance value of the wire used as the ground wire, and the system The reference ground is only connected to the shielding shell through the screw hole on the signal processing circuit board, so that a potential difference is formed between the shielding ground and the reference ground of the external circuit board, which deteriorates the shielding effect

Method used

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  • Electronic equipment with electro-magnetic shielding function
  • Electronic equipment with electro-magnetic shielding function
  • Electronic equipment with electro-magnetic shielding function

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Embodiment Construction

[0020] In order to enable those skilled in the art to better understand the solution of the present invention, and to make the above-mentioned purpose, features and advantages of the present invention more obvious and easy to understand, the following takes a plasma TV as an example, and describes the present invention in conjunction with the accompanying drawings and specific embodiments. Further detailed instructions.

[0021] figure 1 Shown is a schematic diagram of a common plasma TV. As shown, plasma television 100 includes housing 110 . figure 2 Shown is a schematic structural diagram of a plasma TV, as shown in the figure, the plasma TV 100 includes a shielding shell 120, a signal processing circuit board 130, an external circuit board 140, a magnetic ring 150, and signal wires 160 and ground wires 170. Wherein, the external circuit board 140 includes functional circuit boards such as a keyboard, a remote control receiver, and an indicator light. As can be seen from...

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Abstract

The invention provides an electronic device with the function of electromagnetic shielding, which comprises a shielding case and an external circuit board. The shielding case is provided with openings which are used for installing the external circuit board. The external circuit board comprises a grounded part and at least one ground point connected with the shielding case. The electronic device with the function of electromagnetic shielding provided by the invention furthest makes up for the problem of the internal electromagnetic interference leakage caused by the damage of the integrality of the shielding case due to the placement of the external circuit, and has low cost and is easy for the implementation of direct improvement on the existing device type so as to improve the EMC performance of the electronic device.

Description

technical field [0001] The present invention relates to an electronic device, more specifically to an electronic device with an electromagnetic shielding function. Background technique [0002] Electromagnetic Compatibility (EMC) refers to "the performance of a device, equipment or system, which can make it work normally in its own environment without causing strong electromagnetic interference to any other equipment in this environment (IEEEC63.12-1987) .” For wireless transceivers, EMC performance can be partially achieved by using non-contiguous spectrum, but many related examples also show that EMC is not always possible. For example, there is high-frequency interference between laptop computers and test equipment, between printers and desktop computers, and between cell phones and medical instruments. We call this interference electromagnetic interference (EMI). [0003] All electrical and electronic equipment operates with intermittent or continuous changes in voltage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00H05K1/02H04N5/64
Inventor 陈杰洪胜峰
Owner HISENSE VISUAL TECH CO LTD