LED LUMINAIRE
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United States of America Patent
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Issued Date -
Jan 29, 2015
app pub date -
Jul 23, 2014
filing date -
Jul 25, 2013
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Abstract
A light-emitting diode (LED) luminaire includes a light-emitting part, a rectification unit configured to perform full-wave rectification of an alternating current (AC) voltage to supply a first drive voltage to the light-emitting part, a power factor compensation unit configured to be charged with the first drive voltage during a charge period and supply a second drive voltage to the light-emitting part during a compensation period, and an LED drive controller configured to determine a voltage level of the first drive voltage or the second drive voltage and control sequential driving of the first LED group to the nth LED group according to the determined voltage level, such that at least 60% of the LEDs comprising the light-emitting part emit light during the compensation period. The light-emitting part is configured to emit light by receiving the first drive voltage or the second drive voltage.
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