发明名称 |
Time Correction Device, Timepiece Having a Time Correction Device, and Time Correction Method |
摘要 |
A time correction device including a positioning unit that receives signals from positioning information satellites orbiting the Earth and determines the position of the positioning unit; a time correction information storage unit that stores time correction information for correcting time information produced by a time information generating unit; a time information correction unit that corrects the time information based on the time correction information; a time correction basis information storage unit that stores time correction basis information, which is basis information for generating the time correction information; a time correction information generating unit that generates the time correction information based on the time correction basis information; and a selection information storage unit for storing selection information. The time correction basis information includes plural-satellite-referenced time correction basis information that is the basis information for generating the time correction information based on signals from a plurality of positioning information satellites; single-satellite-referenced time correction basis information that is the basis information for generating the time correction information based on signals from a single positioning information satellite using positioning information acquired when the time correction information generating unit generates the time correction information based on the plural-satellite-referenced time correction basis information; and partial-satellite-signal-referenced time correction basis information that is the basis information for generating the time correction information based on a time-related signal in the signals received from a single positioning information satellite using time difference information acquired when the time correction information generating unit generates the time correction information based on the single-satellite-referenced time correction basis information. The selection information is used by the time correction information generating unit to select from the time correction basis information and apply the plural-satellite-referenced time correction basis information, the single-satellite-referenced time correction basis information, or the partial-satellite-signal-referenced time correction basis information.
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申请公布号 |
US2008175105(A1) |
申请公布日期 |
2008.07.24 |
申请号 |
US20070777898 |
申请日期 |
2007.07.13 |
申请人 |
SEIKO EPSON CORPORATION |
发明人 |
URANO OSAMU;FUJISAWA TERUHIKO;HONDA KATSUYUKI;MATSUZAKI JUN |
分类号 |
G01S19/14;G01S19/34;G01S19/35;G04G5/00;G04R20/00 |
主分类号 |
G01S19/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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