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:
Mar. 24, 2010
Hideyuki Nakane, Nishio, JP;
Hideyuki Nakane, Nishio, JP;
Denso Corporation, Kariya, JP;
Abstract
According to a method for initializing an indicating instrument for a vehicle, zero-reset processing is performed. In the zero-reset processing, a control device is made to control a drive signal to rotate a pointer in a zero-reset direction in order to force a step motor to lose synchronization. Furthermore, synchronization loss detection processing is performed. In the detection processing, a physical phenomenon generated in a rotary drive system due to forcible synchronization loss of the motor during the zero-reset processing, is detected. Then, an electrical angle of the drive signal at a time of detection of the phenomenon is selected as a synchronization loss electrical angle. Finally, zero point setting processing is performed. In the setting processing, the electrical angle phase-shifted from the synchronization loss electrical angle in an indication value increasing direction by 180 degrees or less, is set as a zero point stored in the control device.