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Title:
DEVICE
Document Type and Number:
Japanese Patent JP2017125854
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a radiowave intensity measuring device in which the visibility of a display is improved even for weak long-distance radiowaves.SOLUTION: A radiowave intensity measuring device is provided which includes a battery as a power supply for supplying electric power, and the battery is charged with the received radiowaves. The electric power is stored in the battery, when the potential of a signal obtained by the received radiowaves is larger than the output potential of the battery. The electric power generated by the battery is used as the power supply to drive the radiowave intensity measuring device, when the potential of the signal obtained by the received radiowaves is smaller than the output potential of the battery. A thermochromic element or electrochromic element is used as an element for displaying the intensity of radiowaves.SELECTED DRAWING: Figure 1

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Inventors:
DENPO HIROKI
MIYAGUCHI ATSUSHI
Application Number:
JP2017017268A
Publication Date:
July 20, 2017
Filing Date:
February 02, 2017
Export Citation:
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Assignee:
SEMICONDUCTOR ENERGY LAB CO LTD
International Classes:
G01R29/08; G02F1/13; H04B1/16
Domestic Patent References:
JP2002366059A2002-12-20
JP2005339825A2005-12-08
JP2001338273A2001-12-07
JP2000138512A2000-05-16
JP2003168085A2003-06-13
JP2006237581A2006-09-07
JPH0429894A1992-01-31
JP2004264916A2004-09-24
JPH11268460A1999-10-05
Foreign References:
US20110267075A12011-11-03
US5773974A1998-06-30
WO2006101493A12006-09-28



 
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