Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
November 21, 2006
Patent Application Number
11022588
Date Filed
December 27, 2004
Patent Citations Received
Patent Primary Examiner
Patent abstract
An LED driving circuit that is directly activated by an AC power supply is disclosed. A driving circuit has a first and second pair of opposite branches. The first pair of opposite branches operates in a positive half cycle of the AC power supply and the second pair of branches operates in a negative half cycle of the AC power supply, so the lighting time for each LED is less than a half cycle time, in other words, the time for heat dissipation is prolonged.
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