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Title:
電子時計、通常駆動パルスの駆動ランク選択方法
Document Type and Number:
Japanese Patent JP7437283
Kind Code:
B2
Abstract:
To provide an electronic clock capable of suppressing power consumption and a drive rank selection method for a normal drive pulse.SOLUTION: An electronic clock 100 comprises a step motor ST, a normal drive pulse generation circuit 3, a rotation detection circuit 9, and a drive rank selection circuit 10. Drive ranks include at least a specific drive rank, a first drive rank to be selected when a rank is ranked down from the specific drive rank, and a second drive rank to be selected when the rank is ranked up from the specific drive rank. The drive rank selection circuit 10 performs different control in the selection of a drive rank between a case where the last output normal drive pulse SP is the first drive rank and the drive rank of the normal drive pulse SP to be output this time is ranked up, and a case where the last output normal drive pulse SP is the second drive rank and the drive rank of the normal drive pulse SP to be output this time is ranked down.SELECTED DRAWING: Figure 6

Inventors:
Yoko Higashi
Toshiaki Fukushima
Toshinari Maeda
Application Number:
JP2020171490A
Publication Date:
February 22, 2024
Filing Date:
October 09, 2020
Export Citation:
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Assignee:
Citizen Watch Co., Ltd.
International Classes:
G04C3/14
Domestic Patent References:
JP2018173419A
JP2011101576A
Attorney, Agent or Firm:
Patent Attorney Corporation Haruka International Patent Office