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:
Aug. 07, 2012
Filed:
Dec. 16, 2008
Shih-fang Wong, Taipei Hsien, TW;
Tsung-jen Chuang, Taipei Hsien, TW;
Lin-kun Ding, Shenzhen, CN;
Jiang-feng Shan, Shenzhen, CN;
Shih-Fang Wong, Taipei Hsien, TW;
Tsung-Jen Chuang, Taipei Hsien, TW;
Lin-Kun Ding, Shenzhen, CN;
Jiang-Feng Shan, Shenzhen, CN;
Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Shenzhen, Guangdong Province, CN;
Hon Hai Precision Industry Co., Ltd., Tu-Cheng, New Taipei, TW;
Abstract
A state switching device for switching the states of a device by detecting a battery voltage of the device is provided. The device includes a voltage dividing circuit to provide an output voltage in proportion to the battery voltage, and a detection unit which includes a voltage detection module, a comparison module, a control module and a state detection module to obtain the device's state. The voltage detection module produces a digital detection voltage according to the output voltage at normal time intervals, the comparison module detects whether the digital detection voltage is lower than a reference voltage corresponding to the state. If yes, the voltage detection module obtains digital detection voltage at abnormal time intervals. The comparison module compares a predetermined number of digital detection voltages with the reference voltage to produce comparison results. The control module determines whether to maintain the device's state according to the comparison results.