Remote control system
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorShunpei Yamazaki
Life of this patent
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Abstract
Provided is a remote control system with which leakage current flowing in a switch can be reduced so that power consumption can be reduced. The remote control system includes a portable information terminal, a server, and an electric device. The on/off of the switch included in the electric device is controlled using information transmitted from the portable information terminal to the server. The switch includes a transistor formed using a semiconductor whose band gap is larger than that of single crystal silicon in a channel formation region.
Claims10
A remote control system comprising:
- a portable information terminal;
- a server transmitting/receiving information to/from the portable information terminal;
- and
- an electric device, wherein the electric device comprises:
- a communication circuit;
- a power supply circuit including a first transistor, a second transistor, a voltage regulator circuit and a power switch control circuit;
- and
- a load,
- wherein the electric device transmits/receives the information to/from the server by the communication circuit,
- wherein a gate of each of the first transistor and the second transistor is electrically connected to the power switch control circuit,
- wherein one of source and drain of each of the first transistor and the second transistor is electrically connected to the voltage regulator circuit,
- wherein the voltage regulator circuit supplies power to the load, and
- wherein each of the first transistor and the second transistor contains a semiconductor whose band gap is larger than that of a single crystal silicon in a semiconductor layer where a channel is formed.
A remote control system comprising:
- a portable information terminal;
- a server transmitting/receiving information to/from the portable information terminal;
- and
- an electric device including a bathroom controller,
- wherein the electric device comprises:
- a communication circuit;
- a power supply circuit including a first transistor, a second transistor, a voltage regulator circuit and a power switch control circuit;
- and
- a load,
- wherein the electric device transmits/receives the information to/from the server by the communication circuit,
- wherein a gate of each of the first transistor and the second transistor is electrically connected to the power switch control circuit,
- wherein one of source and drain of each of the first transistor and the second transistor is electrically connected to the voltage regulator circuit,
- wherein the voltage regulator circuit supplies power to the load, and
- wherein each of the first transistor and the second transistor contains a semiconductor whose band gap is larger than that of a single crystal silicon in a semiconductor layer where a channel is formed.
Dependencies are inferred from the claim text.