DRIVING DEVICE FOR ELECTROCHROMIC DEVICE, ELECTROCHROMIC APPARATUS, OPTICAL FILTER, IMAGING APPARATUS, LENS UNIT, AND WINDOW MEMBER INCLUDING ELECTROCHROMIC DEVICE, AND METHOD FOR DRIVING ELECTROCHROMIC DEVICE
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United States of America Patent
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Issued Date -
Oct 20, 2016
app pub date -
Dec 10, 2014
filing date -
Dec 26, 2013
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Abstract
The present invention provides a driving device for an electrochromic device, the driving device including a controller. An electrochromic device has a characteristic region in which a change in a Duty ratio from a to b brings a change in the light transmittance of the electrochromic device from TA to TB and in which a change in the Duty ratio from b to a brings a change in the light transmittance of the electrochromic device from TC different from TB to TD different from TA, and the a controller controls the electrochromic device such that a Duty ratio employed in the case where the light transmittance of the electrochromic device is decreased to the intended light transmittance T1 is different from a Duty ratio employed in the case where the light transmittance of the electrochromic device is increased to the intended light transmittance T1.
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