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US 2017/0248128 A1Published application
Semiconductor device and sensor system
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsJun KOYAMA, Sho NAGAO
Life of this patent
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Abstract
A sensor system that does not require wiring connection is provided. The sensor system includes a power generator, a power storage device, a wireless device, a sensing device, and a power switch (PSW). Data is transmitted and received wirelessly. Energy harvesting with vibration or the like is used as a power source, and supply of power to an unused portion of the PSW is stopped.
Claims20
A semiconductor device comprising:
- a power generator;
- a power storage device;
- a wireless device;
- a sensing device configured to perform sensing;
- a sensing device controller;
- a power switch;
- a power switch controller;
- and
- a timer,
- wherein the power switch and the power switch controller are configured to power off the sensing device controller when the sensing is not performed,
- wherein data obtained by the sensing device is transmitted through the wireless device, and
- wherein power generated in the power generator is used.
9 more elements
A sensor system comprising:
- a power generator;
- a power storage device;
- a wireless device;
- a sensing device configured to perform sensing;
- a sensing device controller;
- a power switch;
- a power switch controller;
- and
- a timer,
- wherein the power switch and the power switch controller are configured to power off the sensing device controller when the sensing is not performed,
- wherein data obtained by the sensing device is transmitted through the wireless device,
- wherein power generated in the power generator is used, and
- wherein at least one of temperature, humidity, atmospheric pressure, a light wavelength, light quantity, acceleration, and a gas concentration is obtained by the sensing device.
10 more elements
Dependencies are inferred from the claim text.