Anti-electromagnetic interference device
An anti-electromagnetic interference and voltage technology, which is applied in lighting devices, lamp circuit layout, output power conversion devices, etc., can solve the problems of shortening the life cycle of the lamp driving circuit and the lamp, and achieve the effect of preventing electromagnetic interference.
Active Publication Date: 2019-04-26
QUAN MEI TECHNOLOGY CO LTD
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Problems solved by technology
[0002] The existing car light driving circuit is suitable for use between a power supply and a car light. The car light driving circuit includes a driving chip electrically connected to a power supply to receive a driving voltage, and a plurality of electronic components. The cooperating action of the electronic parts can control the brightness of the car lamp, so that a user can adjust the brightness of the lamp according to the brightness of the surrounding environment and maintain a good line of sight to achieve safe driving. However, the existing car The lamp driving circuit has been designed with blind spots of Electromagnetic interference (EMI) for a long time, which often shortens the life cycle of the lamp driving circuit and the lamp
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[0020] Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same numerals.
[0021] refer to figure 1 and figure 2 An embodiment of the anti-electromagnetic interference device 30 of the present invention is suitable for driving a light emitting unit 34 , the anti-electromagnetic interference device 30 includes an anti-electromagnetic interference filter module 35 and a driving circuit 31 .
[0022] The anti-electromagnetic interference filter module 35 includes a surge absorber 36 , an anti-reverse connection circuit 37 , and an input filter unit 38 .
[0023] The surge absorber 36 receives an input signal V1, V2, V3, clamps the surge of the input signal V1, V2, and provides the input signal V11, V21 after clamping the surge, and the input signal V1, V2, V3 It includes a first voltage V1, a second voltage V2, and a third voltage V3, and the first voltage V1 is greater than the second ...
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Disclosed is an electromagnetic interference prevention apparatus suitable for driving a light emitting unit. The electromagnetic interference prevention apparatus comprises an electromagnetic interference prevention filtering module, and a group of driving circuits connected between the electromagnetic interference prevention filtering module and the light emitting unit; the electromagnetic interference prevention filtering module comprises a surge absorber which is used for receiving an input signal and controlling the surge of the input signal, and a group of inversion connection preventing circuits which are electrically connected with the surge absorber to receive the surge-controlled input signal; the inversion connection preventing circuits determine whether to generate an output signal related to the input signal or not according to the polarity of the surge-clamped input signal; the driving circuit receives the output signal from the electromagnetic interference prevention filtering module and a driving signal is generated by the driving circuit according to the output signal to drive the light emitting unit so as to actually realize electromagnetic interference prevention.
Description
technical field [0001] The invention relates to a device, in particular to an anti-electromagnetic interference device. Background technique [0002] The existing car light driving circuit is suitable for use between a power supply and a car light. The car light driving circuit includes a driving chip electrically connected to a power supply to receive a driving voltage, and a plurality of electronic components. The cooperating action of the electronic parts can control the brightness of the car lamp, so that a user can adjust the brightness of the lamp according to the brightness of the surrounding environment and maintain a good line of sight to achieve safe driving. However, the existing car The design of the lamp driving circuit has long had a blind spot of Electromagnetic interference (EMI), causing the life cycle of the lamp driving circuit and the lamp to be greatly shortened. Contents of the invention [0003] The object of the present invention is to provide an a...
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IPC IPC(8): H05B37/02H02M1/44
CPCH02M1/44H05B47/10
Inventor 张修铭黄国贤
Owner QUAN MEI TECHNOLOGY CO LTD