Switch device and power supply control system

• US 7,939,972 B2
• Filed: 12/21/2007
• Issued: 05/10/2011
• Est. Priority Date: 12/27/2006
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Fukutome, Takahiro
• Primary Examiner(s): Fureman; Jared J
• Assistant Examiner(s): AMAYA, CARLOS DAVID
• Application Number:
  US12/003,279
• Publication Number:
  US 20080157606A1
• Time in Patent Office: 1,236 Days
• Field of Search: 307/112, 307/126, 307/129
• US Class Current: 307/112
• CPC Class Codes: H01H 63/36 Circuit arrangements for ensuring correct or desired operation and not adapted to a particular application of the selector switch
• CPC Class Codes: H02B 1/24 Circuit arrangements for boards or switchyards
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H04B 1/0003 Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain digital baseband systems H04L25/00; digital modulation/demodulation H04L27/00; CDMA H04B1/707; TDMA H04B7/2643; image transmission H04N5/00
• CPC Class Codes: H04L 12/10 Current supply arrangements
• CPC Class Codes: H04M 1/73 Battery saving arrangements
• CPC Class Codes: H04W 52/0225 using monitoring of external events, e.g. the presence of a signal
• CPC Class Codes: H04W 52/0251 using monitoring of local events, e.g. events related to user activity
• CPC Class Codes: H04W 52/0254 detecting a user operation or a tactile contact or a motion of the device
• CPC Class Codes: H04W 52/0261 managing power supply demand, e.g. depending on battery level
• CPC Class Codes: H04W 52/0274 by switching on or off the equipment or parts thereof
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y04S 20/20 End-user application control systems

Abstract

The switch device includes a control switch that turns on/off an electrical connection between an apparatus and the power supply, a condition judging circuit that judges conditions of driving the control switch, an electric wave reception circuit that receives an electric wave, and a power supply circuit that generates power from the electric wave received by the electric wave reception circuit. An electric wave transmission device that transmits an electric wave for making the switch device operate is arranged in a space, whereby the electric wave can be received by the electric wave reception device in the specific space. The switch device controls the control switch to be turned off/on when the electric wave is received. Alternatively, when the electric wave is not received, the switch device turns on/off the control switch.

Claims

1. A switch device adapted to be incorporated in an apparatus having a circuit, the switch device comprising:

an electric wave reception circuit to receive an electric wave;

a power supply circuit to generate a power from the electric wave that is received by the electric wave reception circuit;

a condition judging circuit to judge a status of the generation of the power in the power supply circuit;

a control switch adapted to turn on/off an electrical connection between the circuit and a power supply in accordance with an output of the condition judging circuit; and

a sensor circuit, wherein the sensor circuit is electrically connected to the condition judging circuit so as to be operationally connected to the condition judging circuit.

2. A switch device adapted to be incorporated in an apparatus having a control circuit which controls supply of a first power from a power supply, the switch device comprising:

an electric wave reception circuit to receive an electric wave;

a power supply circuit to generate a second power from the electric wave that is received by the electric wave reception circuit;

a condition judging circuit to judge a status of the generation of the second power in the power supply circuit; and

a sensor circuit, wherein the sensor circuit is electrically connected to the condition judging circuit so as to be operationally connected to the condition judging circuit,

wherein an output side of the condition judging circuit is connected to the control circuit, and

wherein the condition judging circuit is configured to output a signal that controls supply of the first power to the apparatus.

3. An electronic device comprising:

a switch device; and

a circuit electrically connected to a power supply through the switch device,

wherein the switch device comprises;

an electric wave reception circuit configured to receive an electric wave;

a power supply circuit configured to generate a power from the electric wave received by the electric wave reception circuit;

a condition judging circuit configured to judge a status of the generation of the power in the power supply circuit;

a control switch configured to control an electrical connection between the circuit and the power supply; and

a sensor circuit, wherein the sensor circuit is electrically connected to the condition judging circuit so as to be operationally connected to the condition judging circuit,

wherein the condition judging circuit is configured to control the control switch to be turned on/off.

4. An electronic device comprising:

a switch device; and

a control circuit which controls supply of a first power from a power supply,

wherein the switch device comprises;

an electric wave reception circuit configured to receive an electric wave;

a power supply circuit configured to generate a second power from the electric wave received by the electric wave reception circuit;

a condition judging circuit configured to judge a status of the generation of the second power in the power supply circuit; and

a sensor circuit, wherein the sensor circuit is electrically connected to the condition judging circuit so as to be operationally connected to the condition judging circuit,

wherein the condition judging circuit is configured to output a signal that controls supply of the first power to the electronic device.

5. A power supply control system comprising:

a switch device adapted to be incorporated in an apparatus having a circuit; and

an electric wave transmission device to transmit an electric wave,

wherein the switch device comprises;

an electric wave reception circuit to receive the electric wave;

a power supply circuit to generate a power from the electric wave that is received by the electric wave reception circuit;

a condition judging circuit to judge a status of the generation of the power in the power supply circuit;

a control switch adapted to turn on/off an electrical connection between the circuit and a power supply in accordance with an output of the condition judging circuit; and

a sensor circuit, wherein the sensor circuit is electrically connected to the condition judging circuit so as to be operationally connected to the condition judging circuit.

6. The switch device of the power supply control system according to claim 5, further comprising:

a hand-operated switch that turns on/off the electrical connection between the circuit and the power supply by hand.

7. A power supply control system comprising:

a switch device adapted to be incorporated in an apparatus having a circuit; and

an electric wave transmission device to transmit an electric wave,

wherein the switch device comprises;

an electric wave reception circuit to receive the electric wave;

a power supply circuit to generate a first power from the electric wave that is received by the electric wave reception circuit;

a condition judging circuit to judge a status of the generation of the first power in the power supply circuit; and

a sensor circuit, wherein the sensor circuit is electrically connected to the condition judging circuit so as to be operationally connected to the condition judging circuit,

wherein the condition judging circuit outputs a signal that controls supply of a second power from a power supply to the apparatus.

8. The switch device of the power supply control system according to claim 7, further comprising:

a hand-operated switch that turns on/off the electrical connection between the circuit and the power supply by hand.