Invention Grant
- Patent Title: Timepiece and control method of a timepiece
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Application No.: US16816395Application Date: 2020-03-12
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Publication No.: US11669052B2Publication Date: 2023-06-06
- Inventor: Masaya Ninomiya
- Applicant: Seiko Epson Corporation
- Applicant Address: JP Tokyo
- Assignee: Seiko Epson Corporation
- Current Assignee: Seiko Epson Corporation
- Current Assignee Address: JP Tokyo
- Agency: Harness, Dickey & Pierce, P.L.C.
- Priority: JP 2019045757 2019.03.13
- Main IPC: G04F5/04
- IPC: G04F5/04 ; G04D7/00 ; G04G3/02

Abstract:
A timepiece reduces power consumption while maintaining required precision. The timepiece has a frequency divider that frequency divides an oscillation signal and outputs a reference signal; nonvolatile memory that stores information related to a temperature characteristic of the oscillation frequency of the crystal oscillator; multiple registers; a temperature measuring circuit; an evaluation circuit; and a temperature compensation circuit. The temperature compensation circuit reads the information from one of the registers and corrects the reference signal based on the read information and the temperature measurement information when the evaluation circuit determines the information stored in the multiple registers is the same; and when the evaluation circuit determines the information stored in the multiple registers is different, reads the information from the nonvolatile memory, stores the read information in the multiple registers, and corrects the reference signal based on the read information and the temperature measurement information.
Public/Granted literature
- US20200293002A1 Timepiece And Control Method Of A Timepiece Public/Granted day:2020-09-17
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