LED drive circuit

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United States of America Patent

PATENT NO 9872354
SERIAL NO

15118181

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Abstract

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An LED drive circuit (1) includes a controller (5) which controls a duty ratio of a PWM signal and driving current for driving a blue LED chip (7B) with a blue LED driver (3B) based on blue light, green light, and red light which are received by a photo sensor (4).

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Patent Owner(s)

Patent OwnerAddress
SHARP KABUSHIKI KAISHASAKAI-SHI OSAKA 590-8522

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Yamashita, Atsushi Sakai, JP 135 3148

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