Invention Grant
US09176176B2 Radio field intensity measurement device, and radio field intensity detector and game console using the same
有权
无线电场强度测量装置，无线电场强度检测器和游戏机使用相同
- Patent Title: Radio field intensity measurement device, and radio field intensity detector and game console using the same
- Patent Title (中): 无线电场强度测量装置，无线电场强度检测器和游戏机使用相同
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Application No.: US13706630Application Date: 2012-12-06
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Publication No.: US09176176B2Publication Date: 2015-11-03
- Inventor: Hiroki Dembo , Atsushi Miyaguchi
- Applicant: Semiconductor Energy Laboratory Co., Ltd.
- Applicant Address: JP Atsugi-shi, Kanagawa-ken
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP Atsugi-shi, Kanagawa-ken
- Agency: Robinson Intellectual Property Law Office, P.C.
- Agent Eric J. Robinson
- Priority: JP2006-309996 20061116
- Main IPC: G08B21/00
- IPC: G08B21/00 ; G01R29/08 ; H01Q1/24 ; H01Q1/28 ; H01Q1/38 ; H02J7/02 ; H02J17/00 ; H04B1/16
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.
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