Light control device

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United States of America Patent

PATENT NO 10890791
APP PUB NO 20190353945A1
SERIAL NO

16526197

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A light control device includes: a light control element including a first layer stack and a second layer stack which include electrodes provided on base members, respectively, and a liquid crystal layer sandwiched between the first and second layer stacks; a switching element connected between an AC power supply and the light control element; a comparator that detects whether or not the AC power supply is higher than a first voltage that is higher than 0 V and is lower than a maximum value of the AC power supply; and a control circuit that performs PWM control or PFM control on the switching element if the AC power supply is higher than the first voltage.

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Patent Owner(s)

  • TOPPAN PRINTING CO LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Takahashi, Hiroshi Tokyo, JP 851 11449

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