Seiko Epson Corporation

Hiroshi Uozumi

Naoki Gobara

Mikio Nagahara

Koichi Hatanaka

Maho Terashima

Ryota Hirakawa

An electronic apparatus including a power generation module including a power generation unit and a battery configured to store power generated by the power generation unit, a detection device, a drive unit including a plurality of circuits including a circuit configured to output a voltage to the detection device based on the power of the power generation module, a second capacitor unit electrically coupled in parallel to the battery, and a portable housing configured to accommodate the power generation module, the detection device, the drive unit, and the second capacitor unit.

Electronic apparatus having portable housing and power supply circuit

An electronic timepiece includes: a power source; a correlation computation unit executing correlation computation processing of sequentially computing a correlation value between a signal sample and a plurality of codes corresponding to a plurality of satellites; a power source voltage determination unit to which a voltage of a power source is inputted and which determines whether the inputted voltage is lower than a first threshold or not, or whether the voltage exceeds a second threshold set to be equal to or higher than the first threshold; and a correlation computation control unit controlling the correlation computation unit to interrupt the correlation computation processing when the power source voltage determination unit determines that the voltage is lower than the first threshold, and to resume the correlation computation processing when the power source voltage determination unit determines that the voltage exceeds the second threshold.

Electronic timepiece, satellite signal receiving device, and method for controlling satellite signal receiving device

A satellite signal receiver has a positioning error in a range from &#x2212;8 m to +8 m with a probability equal to or more than 95% when positioning in a reception environment with a signal strength equal to or more than &#x2212;135 dBm and average power consumption from start of positioning to first positioning equal to or less than 7 mW.

Satellite signal receiver

An integrated circuit for satellite signal reception includes a position calculation part and has a volume of 9.33 mmor less, and a time from measurement start to initial measurement of 120 seconds or less at a signal intensity of &#x2212;162 dBm or more and &#x2212;160 dBm or less.

Integrated circuit for satellite signal reception

A positioning system that uses a positioning terminal, an information provision device, and a communication network. The information provision device is configured to perform position calculations for the positioning terminal only when the results of position calculations can be considered to be successful. Thus, a load on the information provision device can be reduced.

Positioning system, positioning terminal, information provision device, positioning method, control program for positioning system, and computer-readable recording medium for recording control program for positioning system

Growing community of inventors

Matsumoto, Japan

Hiroshi Uozumi