The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 2012
Filed:
May. 04, 2009
Dezhi Zou, Shenzhen, CN;
Dezhi Zou, Shenzhen, CN;
Civilight Shenzhen Semiconductor Lighting Co. Ltd., Shenzhen, CN;
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.