Remote control system

• US 9,312,390 B2
• Filed: 06/26/2013
• Issued: 04/12/2016
• Est. Priority Date: 07/05/2012
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Yamazaki, Shunpei
• Primary Examiner(s): McNally, Kerri
• Assistant Examiner(s): Dorsey, Renee
• Application Number:
  US13/927,827
• Publication Number:
  US 20140009270A1
• Time in Patent Office: 1,021 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G08C 17/02 using a radio link
• CPC Class Codes: G08C 19/00 Electric signal transmission systems G08C17/00 takes precedence
• CPC Class Codes: G08C 2201/00 Transmission systems of control signals via wireless link
• CPC Class Codes: G08C 2201/12 Power saving techniques of remote control or controlled devices
• CPC Class Codes: G08C 2201/93 Remote control using other portable devices, e.g. mobile phone, PDA, laptop
• CPC Class Codes: H01L 27/1207 combined with devices in contact with the semiconductor body, i.e. bulk/SOI hybrid circuits
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H01L 29/7869 having a semiconductor body comprising an oxide semiconductor material, e.g. zinc oxide, copper aluminium oxide, cadmium stannate
• CPC Class Codes: H02M 1/088 for the simultaneous control of series or parallel connected semiconductor devices
• CPC Class Codes: H02M 7/44 by static converters
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

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.

Claims

1. 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.

2. The remote control system according to claim 1, wherein the portable information terminal and the server are connected to each other through a telephone line or an internet line.

3. The remote control system according to claim 1, wherein the server and the electric device are connected to each other by wireless communication.

4. The remote control system according to claim 1, wherein the semiconductor is an oxide semiconductor.

9. The remote control system according to claim 1, wherein the server and the electric device are inside a house, and the portable information terminal transmits the information from outside the house.

5. 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.

6. The remote control system according to claim 5, wherein the portable information terminal and the server are connected to each other through a telephone line or an internet line.

7. The remote control system according to claim 5, wherein the server and the electric device are connected to each other by wireless communication.

8. The remote control system according to claim 5, wherein the semiconductor is an oxide semiconductor.

10. The remote control system according to claim 5, wherein the server and the electric device are inside a house, and the portable information terminal transmits the information from outside the house.