Solid-state lighting without operational uncertainty and free of fire hazard
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United States of America Patent
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Oct 24, 2017
Grant Date -
Aug 11, 2016
app pub date -
Apr 18, 2016
filing date -
Jun 15, 2012
priority date (Note) -
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Abstract
A light-emitting diode (LED)-based solid-state lamp (LED lamp) comprising four input ports, two bridge rectifiers, two interface modules, an LED driving circuit, and LED arrays operates normally for an input voltage applied from any two of the input ports without operational uncertainty and a fire hazard. The LED driving circuit is configured to provide a regulated power and current to drive the LED arrays. With a cycle-by-cycle triac switching and current control, an over-rated surge current is limited, preventing any fire hazards possibly occurred in the ballast when operated with the LED lamp. With various electrical connection terminals, the lamp can fit and operate in various lamp fixtures comprising two-pin, four-pin, or Edison-base sockets.
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