Invention Grant
- Patent Title: Liquid crystal control circuit, electronic timepiece, and liquid crystal control method
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Application No.: US17014730Application Date: 2020-09-08
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Publication No.: US11295686B2Publication Date: 2022-04-05
- Inventor: Takahiro Ono , Fumiaki Ochiai , Yoshinori Asami , Eiji Yamakawa
- Applicant: CASIO COMPUTER CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: CASIO COMPUTER CO., LTD.
- Current Assignee: CASIO COMPUTER CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Seed IP Law Group LLP
- Priority: JPJP2018-054658 20180322
- Main IPC: G09G3/36
- IPC: G09G3/36 ; G04G9/12

Abstract:
A liquid crystal control circuit includes: a first terminal that outputs a rewriting signal for rewriting a plurality of pixels; a second terminal that periodically designates a start timing of the rewriting signal; a third terminal that outputs a polarity signal for designating polarity of AC voltage; a first circuit that identifies a next second inversion timing of any first inversion timing at which the polarity is inverted; a calculator that calculates a first start timing after the first inversion timing based on the start timing; a second circuit that determines whether the second inversion timing is within a period from a predetermined time before the first start timing to the first start timing; and an inversion unit that inverts polarity of the polarity signal after the rewriting signal starting from the first start timing is stopped, when the second inversion timing is within the period.
Information query
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