The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 30, 2007
Filed:
Mar. 07, 2005
Yoshihiro Wakisaka, Kokubunji, JP;
Shunzo Yamashita, Musashino, JP;
Toshiyuki Odaka, Fuchu, JP;
Norio Ohkubo, Tokyo, JP;
Yoshihiro Wakisaka, Kokubunji, JP;
Shunzo Yamashita, Musashino, JP;
Toshiyuki Odaka, Fuchu, JP;
Norio Ohkubo, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A radio terminal device realizing reduced power consumption and prompt detection of detection object by using a first sensor and a second sensor whose ON/OFF states are opposite and whose operations are synchronized. When the first sensor detects a detection object, the first output voltage level is changed. When a processor detects the change of the output voltage level as an interrupt signal, the drive voltage level of the first sensor is switched to low and the drive voltage level of the second sensor is switched to high. Moreover, when the second sensor detects a detection object, the output voltage level of the second sensor is changed. When the processor detects the change of the output voltage level as an interrupt signal, the drive voltage level of the second sensor is switched to low and the drive voltage level of the first circuit is switched to high.