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US 10,371,129 B2Granted
Semiconductor device and sensor system
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsJun Koyama, Sho Nagao
Life of this patent
Estimating the term…
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.
Claims18
A semiconductor device comprising:
- a power generator;
- a wireless device;
- a sensing device configured to perform sensing;
- a sensing device controller;
- a power switch;
- a power switch controller;
- and
- a memory,
- wherein the memory includes a transistor whose channel formation region includes an oxide semiconductor,
- wherein the power switch and the power switch controller are configured to power off the sensing device controller and the memory when the sensing is not performed,
- wherein data obtained by the sensing device is transmitted through the wireless device, and
- wherein the sensing device uses power generated in the power generator.
9 more elements
A sensor system comprising:
- a power generator;
- a wireless device;
- a sensing device configured to perform sensing;
- a sensing device controller;
- a power switch;
- a power switch controller;
- and
- a memory,
- wherein the memory includes a transistor whose channel formation region includes an oxide semiconductor,
- wherein the power switch and the power switch controller are configured to power off the sensing device controller and the memory when the sensing is not performed,
- wherein data obtained by the sensing device is transmitted through the wireless device,
- wherein the sensing device uses power generated in the power generator, 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.