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. 10, 2023
Filed:
Sep. 26, 2017
Appotronics Corporation Limited, Shenzhen, CN;
APPOTRONICS CORPORATION LIMITED, Shenzhen, CN;
Abstract
A color wheel phase detection method and system, and a projection device. The phase detection system comprises a color wheel (), a color wheel motor () that drives the color wheel () to rotate, and a control circuit (); the color wheel motor () is a three-phase motor, and the control circuit () comprises a three-phase driving circuit () for driving the color wheel motor () to operate. The phase detection system further comprises a phase detection device () for detecting the three-phase driving circuit (); when detecting a preset phase, the phase detection device () sends a pulse signal to the control circuit () to implement color wheel phase detection. Therefore, the effects of low costs, high accuracy, and high reliability are achieved.