LED dimmer device adapted for use in dimmer
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United States of America Patent
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Mar 20, 2012
Grant Date -
Nov 4, 2010
app pub date -
May 4, 2009
filing date -
May 4, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A LED dimmer device for use in dimmer is provided. The LED dimmer device includes rectifier, voltage boost device, pre-voltage detection circuit and after-voltage detection circuit adapted for detect voltage, master chip adapted for driving circuit and elements to work, elementary transformer and secondary transformer adapter for changing voltage, secondary rectifier adapted for rectifying and secondary filter capacitance circuit adapter for filtering, and secondary switch tube. The rectifier is adapted for transforming alternating current into direct current. The voltage boost device includes a metal oxide semiconductor field effect transistor used to make dimmer entering into a normal edge state. The master chip includes integrated comparing element used to compare voltage. The secondary switch tube is used to driving elementary transformer and secondary transformer, secondary rectifier, secondary filter capacitance circuit so as to drive LED power supply to illuminate.
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