Reversible polarity LED lamp module using current regulator and method therefor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 18, 2008
Grant Date -
Jul 6, 2006
app pub date -
Jan 5, 2005
filing date -
Jan 5, 2005
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lamp module has a base with first and second electrical contacts for inserting into a socket in alternate orientations. A printed circuit board is mounted to the base and has a reverse polarity circuit coupled to the first and second electrical contacts for converting a DC potential across the first and second electrical contacts to a power supply voltage. A current regulator has a first terminal receiving the DC power supply voltage from the reverse polarity circuit. A programming circuit provides a programming current to a second terminal of the current regulator to generate an output current in response to the programming current. An LED matrix is mounted to the base and has an input coupled for receiving the output current of the current regulator. The LED matrix has interconnected LEDs which emit a light intensity in response to the output current of the current regulator.
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