发明授权
- 专利标题: Electronic timepiece equipped with battery life display
- 专利标题(中): 电子钟表配备电池寿命显示
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申请号: US882939申请日: 1978-03-02
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公开(公告)号: US4219999A公开(公告)日: 1980-09-02
- 发明人: Singo Ichikawa , Yoshiaki Kato
- 申请人: Singo Ichikawa , Yoshiaki Kato
- 申请人地址: JPX Tokyo
- 专利权人: Citizen Watch Company, Limited
- 当前专利权人: Citizen Watch Company, Limited
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX52-22202 19770303; JPX52-89671 19770726
- 主分类号: G04C3/14
- IPC分类号: G04C3/14 ; G04C10/04 ; G04C3/00 ; G04B37/12
摘要:
An electronic timepiece equipped with a battery life warning system, in which an output voltage of a battery are detected under a heavy load condition and a light load condition. In a first preferred embodiment, a time indicating means effects a display of time in a first predetermined more to provide an initial warning of the battery life when the output voltage drops below a first predetermined level during the heavy load condition and also effects of the display of time in a second predetermined mode to provide a second warning of the battery life when the output voltage of the battery drops below a second predetermined level lower than the first predetermined level. In a second preferred embodiment, when the output voltage of the battery drops below the first predetermined level, a drive signal for driving the time indicating means is produced so as to drive the time indicating means with a sufficient driving energy substantially equal to that of a drive signal being produced when there is no voltage drop in the battery. When the output voltage of the battery drops below the second predetermined level, a control signal is applied to the time indicating means, which is consequently rendered to display the time information in a modulated form for thereby providing a warning of the battery life.
公开/授权文献
- US5835284A Catadioptric optical system and adjusting method 公开/授权日:1998-11-10