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Electronic device, filtering module and method for reducing common mode noise

A filter module and electronic device technology, which is applied to output power conversion devices, electrical components, magnetic field/electric field shielding, etc., can solve problems such as complicated assembly procedures, falling off of connectors 14, and increased internal volume.

Inactive Publication Date: 2011-07-06
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when installing the filter ring 10 on the flexible flat cable 18, a space needs to be reserved during assembly, and the assembly procedure is relatively complicated.
If the flexible flat wire 18 required by the electronic device is larger, the filter ring 10 is also larger, not only the internal volume of the electronic device needs to be increased, but the flexible flat wire 18 is easy to be lost due to the heavy weight of the filter ring 10. Connector 14 comes off

Method used

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  • Electronic device, filtering module and method for reducing common mode noise
  • Electronic device, filtering module and method for reducing common mode noise
  • Electronic device, filtering module and method for reducing common mode noise

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Embodiment Construction

[0023] see Figure 2 to Figure 4 , figure 2 is an external view of an electronic device 3 according to an embodiment of the present invention, image 3 for figure 2 Schematic diagram of part of the internal parts of the electronic device 3 in Figure 4 for image 3 An enlarged view of the filter module 30 in . In this embodiment, the electronic device 3 can be a flat display device, such as a liquid crystal TV, a plasma TV, a digital photo frame, etc., but not limited thereto. like image 3 As shown, the electronic device 3 includes a filter module 30 , a motherboard 32 , a chip 34 , an electronic component 36 and a connecting wire 38 . When the electronic device 3 is a flat display device, the electronic element 36 can be a display panel, but not limited thereto. In addition, the connecting wire 38 can be a flexible flat wire. The motherboard 32 has at least one circuit wiring 320, and the chip 34 is disposed on the motherboard 32 and is electrically connected to th...

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PUM

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Abstract

The invention discloses an electronic device, a filtering module and a method for reducing common mode noise, wherein the filtering module comprises a circuit board, a connector, a filtering ring and a plurality of coils, the connector and the filtering ring are both arranged on the circuit board; and the plurality of coils are wound on the filtering ring and electrically connected with the connector.

Description

technical field [0001] The present invention relates to a filter module, in particular to a filter module for filtering common mode noise. Background technique [0002] Electromagnetic interference (Electromagnetic Interference, EMI) is a physical phenomenon that is pervasive in daily life. Generally speaking, noises that cause electromagnetic interference can be classified into differential mode noise and common mode noise. At present, all electronic devices that need to use flexible cables (Flat Printed Cable, FPC; Flat Flexible Cable, FFC) to connect electronic components have the problem of common mode noise. If the common mode noise is too large, it will make the electronic device fail the EMI test. [0003] see figure 1 , figure 1 It is a schematic diagram of using a filter loop (core) 10 to filter common mode noise for the background art. like figure 1 As shown, a general electronic device (not shown in the figure) has a mainboard 12, and a connector 14 and a ch...

Claims

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Application Information

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IPC IPC(8): H02M1/44H05K9/00
Inventor 束崇万邱智恒邹定基黄仲文
Owner TRANSCEND INFORMATION
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