Retrofit light emitting diode tube
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United States of America Patent
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Oct 24, 2017
Grant Date -
Apr 21, 2016
app pub date -
Jun 16, 2014
filing date -
Jun 27, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Light sources (10) for replacing fluorescent lamps comprise light circuits (3) with light emitting diodes, first and second terminals (1, 2) located at first and second ends of the light sources (10) for exchanging first signals with high-frequency ballasts, and converter circuits (4) for converting the first signals into second signals for feeding the light circuits (3). The converter circuits (4) comprise reactive circuits (5) for matching the light circuits (3) and the high-frequency ballasts and provide safety to persons when installing the light sources (10). The light sources (10) may further comprise protection circuits (7, 8) for protecting parts of the light sources (10) against problems. The protection circuits (7, 8) may comprise monitor circuits (7) for monitoring parameters of the light sources (10) and for in response to monitoring results short-circuiting outputs of the converter circuits (4), and fuses (8). The reactive circuits (5) may comprise protecting capacitors (51, 52).
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