SEMICONDUCTOR DEVICE AND HEATING SYSTEM

• US 20090071952A1
• Filed: 09/09/2008
• Published: 03/19/2009
• Est. Priority Date: 09/13/2007
• Status: Active Application

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: KUWABARA, Hideaki
• Granted Patent: US 10,257,884 B2
• Time in Patent Office: Days
• US Class Current: 219/494
• CPC Class Codes: H05B 1/0233 for semiconductors manufacturing

Abstract

A device that warms a surface of a living body required to be warmed at an appropriate timing at any place indoors and outdoors or the sea without causing low temperature burns. A sheet having a heat generating function including a circuit capable of receiving electric power without contact over a sheet containing plastic or a fibrous body, a heat generating circuit, and a circuit that controls the temperature of the heat generating circuit is manufactured. The user with the sheet transmits the radio signal from the transmission device outdoors or indoors to heat the heat generating circuit on the sheet and the heat can be conducted to the skin of the user. Temperature can be automatically adjusted by the circuit for controlling the temperature of the heat generating circuit.

Claims

1. A semiconductor device comprising:

an antenna provided over a sheet containing plastic or a fibrous body;

a converting circuit for converting a radio wave received by the antenna into electric power, the converting circuit being provided over the sheet;

a control circuit electrically connected to the converting circuit, the control circuit being provided over the sheet;

a heater electrically connected to the control circuit, the heater being provided over the sheet; and

a temperature sensor circuit for measuring temperature of the heater, the temperature sensor circuit being provided over the sheet.

2. The semiconductor device according to claim 1, further comprising, over the sheet, a charging circuit and a secondary battery electrically connected to the charging circuit.

3. The semiconductor device according to claim 1, wherein a plurality of the sheets is arranged to form part of a supporter, a container, gloves, headphones, a sheet, or a carpet being in contact with part of a surface of a living body.

4. A heating system comprising:

a semiconductor device; and

a transmission/reception device;

the semiconductor device comprising;

an antenna provided over a sheet containing plastic or a fibrous body,

a converting circuit for converting a radio wave received by the antenna into electric power, the converting circuit being provided over the sheet,

a control circuit electrically connected to the converting circuit, the control circuit being provided over the sheet,

a heater electrically connected to the control circuit, the heater being provided over the sheet, and

a temperature sensor circuit for measuring temperature of the heater, the temperature sensor circuit being provided over the sheet,

wherein the antenna receives a radio wave transmitted from the transmission/reception device,

wherein the converting circuit converts the radio wave into electric power,

wherein the heater is heated with electric power,

wherein the temperature sensor circuit measures temperature of the heater, and

wherein the control circuit determines whether heating the heater or not based on temperature of the heater.

5. A heating system comprising:

a semiconductor device; and

a transmission/reception device;

the semiconductor device comprising;

an antenna provided over a sheet containing plastic or a fibrous body,

a converting circuit for converting a radio wave received by the antenna into electric power, the converting circuit being provided over the sheet,

a control circuit electrically connected to the converting circuit, the control circuit being provided over the sheet,

a heater electrically connected to the control circuit, the heater being provided over the sheet, and

a temperature sensor circuit for measuring temperature of the heater, the temperature sensor circuit being provided over the sheet,

wherein the antenna receives a radio wave transmitted from the transmission/reception device,

wherein the converting circuit converts the radio wave into electric power,

wherein the heater is heated with electric power,

wherein the temperature sensor circuit measures temperature of the heater, and

wherein the control circuit transmits a temperature data of the heater to the transmission/reception device through the antenna

wherein the transmission/reception device determines whether heating the heater or not based on temperature of the heater.

6. The heating system according to claim 5, wherein the transmission/reception device stops transmitting a radio to stop heating the heater.