Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Johnson Chiang0
Date of Patent
January 24, 2006
0Patent Application Number
104401170
Date Filed
May 19, 2003
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A LED driving device includes a plurality of LEDs, a voltage detecting circuit, and a current switching circuit. When the voltage detecting circuit detects the different voltage level of power source without coupling to a filtering capacitor, it sends a signal to the current switching circuit and then the current switching circuit is automatically activated to electrically rearrange the configuration of LEDs with a predetermined current value by lighting the greatest number of LEDs that improving the power factor and efficiency.
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