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. 16, 2016
Filed:
Jul. 10, 2015
Brother Kogyo Kabushiki Kaisha, Nagoya-shi, Aichi-ken, JP;
BROTHER KOGYO KABUSHIKI KAISHA, Nagoya-Shi, Aichi-Ken, JP;
Abstract
A brushless motor has a rotor and a stator, the stator having coils corresponding to respective phases of the brushless motor. A polygon mirror has a plurality of mirror surfaces and is configured to rotate together with the rotor. When executed by the processor, the instructions cause the processor to: detect first timing at which the light sensor receives a light beam emitted from the light source and reflected by one of the plurality of mirror surfaces when the rotor is rotating; acquire first information identifying a relationship between the first timing and second timing at which an inductive voltage reaches a particular reference value, the inductive voltage being generated in at least one coil in a non-energization state due to rotation of the rotor; and perform a phase switching control of the brushless motor based on the first timing and the first information.