Radio field intensity measurement device, and radio field intensity detector and game console using the same

• US 8,330,607 B2
• Filed: 05/24/2012
• Issued: 12/11/2012
• Est. Priority Date: 11/16/2006
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Dembo, Hiroki, Miyaguchi, Atsushi
• Primary Examiner(s): PHAM, TOAN NGOC
• Application Number:
  US13/479,401
• Publication Number:
  US 20120229097A1
• Time in Patent Office: 201 Days
• Field of Search: 340/635, 340/539.1, 340/636.2, 340/636.1, 340/641, 340/657, 340/691.1, 340/691.6, 702/2, 320/2, 320/56, 320/108
• US Class Current: 340/635
• CPC Class Codes: G01R 27/32 in circuits having distributed constants , e.g. having very long conductors or involving high frequencies
• CPC Class Codes: G01R 29/08 Measuring electromagnetic field characteristics
• CPC Class Codes: G01R 29/0857 Dosimetry, i.e. measuring the time integral of radiation intensity; Level warning devices for personal safety use nuclear radiation dosimetry G01T
• CPC Class Codes: G01R 29/0878 Sensors; antennas; probes; detectors wave guide measuring sections G01R1/24
• CPC Class Codes: H01Q 1/248 provided with an AC/DC converting device, e.g. rectennas
• CPC Class Codes: H01Q 1/28 Adaptation for use in or on aircraft, missiles, satellites, or balloons
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 7/0047 with monitoring or indicating devices or circuits
• CPC Class Codes: H04B 1/1607 Supply circuits converters H02M; filters therefor H02M1/14; voltage stabilisers G05F1/46
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

The present invention provides a radio field intensity measurement device having a display portion with improved visibility, in the case of measuring a weak radiowave from a long distance. In the radio field intensity measurement device, a battery is provided as a power source for power supply and the battery is charged by a received radiowave. When a potential of a signal obtained from the received radiowave is higher than an output potential of the battery, the power is stored in the battery. On the other hand, when the potential of the signal obtained from the received radiowave is lower than the output potential of the battery, power produced by the battery is used as power to drive the radio field intensity measurement device. As an element to display the radio field intensity, a thermochromic element or an electrochromic element is used.

Claims

1. A device comprising:

a circuit comprising a transistor attached to a sheet material;

an antenna electrically connected to the transistor;

a thin film secondary battery electrically connected to the antenna through an anisotropic conductive film or an anisotropic conductive paste;

a display element electrically connected to the circuit,

wherein the antenna is configured to convert a received radiowave to an induction signal;

wherein the thin film secondary battery is charged by a direct signal generated from the induction signal.

2. The device according to claim 1, wherein the sheet material is a film in which an antistatic material is dispersed in a resin, or a film to which an antistatic material is attached.

3. The device according to claim 1, wherein the device is a radio field intensity measurement device.

4. The device according to claim 1, wherein the transistor comprises ZnO or InGaZnO.

5. The device according to claim 1, wherein the antenna is one selected from the group consisting of a dipole antenna, a loop antenna, a Yagi antenna, a patch antenna, and a minute antenna.

6. The device according to claim 1, wherein the display element comprises a resistance heating element and a thermochromic element.

7. The device according to claim 1, wherein the display element comprises a voltage application element and an electrochromic element.

8. A device comprising:

a circuit comprising a transistor attached to a sheet material;

an antenna electrically connected to the transistor;

a thin film secondary battery electrically connected to the antenna through an anisotropic conductive film or an anisotropic conductive paste;

a display element electrically connected to the circuit,

wherein the antenna is configured to convert a received radiowave to an induction signal,

wherein the thin film secondary battery is charged by a direct signal generated from the induction signal,

wherein a color of the display element is changed in accordance with a magnitude of the direct signal.

9. The device according to claim 8, wherein the radiowave is sent from a computer or a stick including a radiowave emitter.

10. The device according to claim 8, wherein the sheet material is a film in which an antistatic material is dispersed in a resin, or a film to which an antistatic material is attached.

11. The device according to claim 8, wherein the device is a radio field intensity measurement device.

12. The device according to claim 8, wherein the transistor comprises ZnO or InGaZnO.

13. The device according to claim 8, wherein the antenna is one selected from the group consisting of a dipole antenna, a loop antenna, a Yagi antenna, a patch antenna, and a minute antenna.

14. The device according to claim 8, wherein the display element comprises a resistance heating element and a thermochromic element.

15. The device according to claim 8, wherein the display element comprises a voltage application element and an electrochromic element.