Wireless sensor device

• US 8,242,903 B2
• Filed: 05/31/2011
• Issued: 08/14/2012
• Est. Priority Date: 09/28/2006
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Koyama, Jun
• Primary Examiner(s): Tweel, Jr., John A
• Application Number:
  US13/118,872
• Publication Number:
  US 20110228065A1
• Time in Patent Office: 441 Days
• Field of Search: 340/539.12, 340/572.1, 340/870.01, 600/300
• US Class Current: 340/539.12
• CPC Class Codes: A61B 2560/0219 of externally powered implanted units
• CPC Class Codes: A61B 2562/166 the sensor is mounted on a specially adapted printed circuit board
• CPC Class Codes: A61B 5/0002 Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network A61B5/07 takes precedence; transmission systems for measured values G08C; transmission H04B; transmission of digital information H04L; wireless communication networks H04W
• CPC Class Codes: A61B 5/0031 Implanted circuitry
• CPC Class Codes: A61B 5/07 Endoradiosondes
• CPC Class Codes: A61B 5/076 Permanent implantations telemetry using implanted circuitry A61B5/0031; implanted stimulators for therapy A61N1/3605, A61N1/362, A61N1/372
• CPC Class Codes: G16H 40/63 for local operation
• CPC Class Codes: G16H 40/67 for remote operation
• CPC Class Codes: H01G 11/22 Electrodes
• CPC Class Codes: H01L 2223/6677 for antenna, e.g. antenna included within housing of semiconductor device antennas per se H01Q
• CPC Class Codes: H01L 23/60 Protection against electrostatic charges or discharges, e.g. Faraday shields
• CPC Class Codes: H01L 23/66 High-frequency adaptations
• CPC Class Codes: H01L 27/13 combined with thin-film or thick-film passive components
• CPC Class Codes: H04B 1/1607 Supply circuits converters H02M; filters therefor H02M1/14; voltage stabilisers G05F1/46
• CPC Class Codes: H04B 13/005 Transmission systems in which the medium consists of the human body
• CPC Class Codes: H05K 1/118 specially for flexible printed circuits, e.g. using folded portions
• CPC Class Codes: H05K 7/00 Constructional details common to different types of electric apparatus casings, cabinets, drawers H05K5/00

Abstract

A wireless sensor device capable of constant operation without replacement of batteries. The wireless sensor device is equipped with a rechargeable battery and the battery is recharged wirelessly. Radio waves received at an antenna circuit are converted into electrical energy and stored in the battery. A sensor circuit operates with the electrical energy stored in the battery, and acquires information. Then, a signal containing the information acquired is converted into radio waves at the antenna circuit, whereby the information can be read out wirelessly.

Claims

1. A wireless sensor device comprising:

a substrate provided with a circuit;

an antenna circuit for transmission and reception of radio waves, wherein the antenna circuit is formed on the substrate;

a battery for storing electrical energy obtained from the radio waves;

an image pickup device over the substrate; and

a package packing the substrate, the antenna circuit, the battery and the image pickup device,

wherein the substrate is over the battery, and

wherein the circuit includes a rectifier circuit, a demodulation circuit, a modulation circuit and a logic circuit.

3. The wireless sensor device according to claim 1, further comprising a ferrite interposed between the substrate and the battery.

5. The wireless sensor device according to claim 1, further comprising a flexible printed board electrically connecting the circuit and the battery.

7. The wireless sensor device according to claim 1, further comprising a memory circuit for storing information of an image acquired by the image pickup device.

9. The wireless sensor device according to claim 1, wherein the wireless sensor device is used inside the living body.

11. The wireless sensor device according to claim 1, wherein the image pickup device is a CCD or a CMOS sensor.

13. The wireless sensor device according to claim 1, wherein the battery is any one of a secondary battery, a thin-film secondary battery or a high-capacity capacitor.

2. A wireless sensor device comprising:

a substrate provided with a circuit;

a first antenna circuit formed on the substrate;

a second antenna circuit formed on the substrate;

a battery;

an image pickup device over the substrate; and

a package packing the substrate, the first antenna circuit, the second antenna circuit, the battery and the image pickup device,

wherein the circuit includes a rectifier circuit, a demodulation circuit, a modulation circuit and a logic circuit,

wherein the substrate is over the battery,

wherein radio waves are converted into electrical energy at the first antenna circuit;

wherein the electrical energy is stored in the battery after rectified by the rectifier circuit; and

wherein radio waves containing information of an image acquired by the image pickup device are radiated from the second antenna circuit.

4. The wireless sensor device according to claim 2, further comprising a ferrite interposed between the substrate and the battery.

6. The wireless sensor device according to claim 2, further comprising a flexible printed board electrically connecting the circuit and the battery.

8. The wireless sensor device according to claim 2, further comprising a memory circuit for storing the information of the image acquired by the image pickup device.

10. The wireless sensor device according to claim 2, wherein the wireless sensor device is used inside the living body.

12. The wireless sensor device according to claim 2, wherein the image pickup device is a CCD or a CMOS sensor.

14. The wireless sensor device according to claim 2, wherein the battery is any one of a secondary battery, a thin-film secondary battery or a high-capacity capacitor.