Invention Grant
- Patent Title: Electrochromic apparatus, optical filter, imaging apparatus, lens unit, window member, and method of driving an electrochromic apparatus
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Application No.: US15061828Application Date: 2016-03-04
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Publication No.: US09678402B2Publication Date: 2017-06-13
- Inventor: Jun Yamamoto
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Agency: Fitzpatrick, Cella, Harper & Scinto
- Priority: JP2015-050475 20150313
- Main IPC: G02F1/163
- IPC: G02F1/163 ; G02F1/153 ; G09G3/38 ; G09G3/19 ; G02F1/15 ; G02F1/155 ; G09G3/16 ; G09G3/20
Abstract:
An electrochromic apparatus includes an electrochromic element comprising a pair of electrodes and an electrochromic layer disposed between the pair of electrodes; and drive circuits connected to the electrochromic element, the drive circuits including a drive circuit A and a drive circuit B, in which, when no voltage is applied in a pulse width modulation (PWM) drive of the drive circuit A, a resistance value of the drive circuit A is larger than a resistance value of the electrochromic element, and in which when no voltage is applied in a PWM drive of the drive circuit B, the pair of electrodes is short-circuited.
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