发明授权
US07616527B2 Electronic timepiece with calendar function and control method for same
有权
电子钟表具有日历功能和控制方式相同
- 专利标题： Electronic timepiece with calendar function and control method for same
- 专利标题（中）： 电子钟表具有日历功能和控制方式相同
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申请号： US11062469申请日： 2005-02-22
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公开(公告)号： US07616527B2公开(公告)日： 2009-11-10
- 发明人: Shuichi Tamura , Takashi Kawaguchi , Joji Kitahara
- 申请人： Shuichi Tamura , Takashi Kawaguchi , Joji Kitahara
- 申请人地址： JP Tokyo
- 专利权人： Seiko Epson Corporation
- 当前专利权人： Seiko Epson Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Global IP Counselors, LLP
- 优先权： JP2004-043462 20040219; JP2004-043497 20040219; JP2004-297139 20041012
- 主分类号： G04B19/20
- IPC分类号： G04B19/20
摘要：
An electronic timepiece with a calendar display function that drives a piezo-electric actuator to drive a rotation of a piezo-electric rotor, and stops the drive of the piezo-electric actuator when the amount of the piezo-electric rotor advances is detected by a spring switch. Photoreflectors are used for day detection accomplished using gears having a small speed reduction ratio relative to the piezo-electric rotor, and spring switches are used in month detection and year detection.