Electronic circuit for driving LED strings so as to reduce the light flicker
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United States of America Patent
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Jan 9, 2018
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N/A
app pub date -
Feb 1, 2017
filing date -
Dec 31, 2015
priority date (Note) -
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Abstract
LED strings cascaded to one another are driven by an electronic circuit that includes regulation modules and a brightness-compensation module. The regulation modules carry out in sequence a current-regulation phase, in which they regulate the current that flows in the corresponding LED strings. The regulation module includes: a compensation regulator coupled to a compensation LED string and to a capacitor and a generator that generates an electrical quantity indicating the luminous flux emitted by the LED strings and by the compensation LED string. The compensation regulator regulates a current that flows in the compensation LED string as a function of the electrical quantity, discharging the capacitor through the compensation LED string.
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