公开(公告)号：US20220412807A1

公开(公告)日：2022-12-29

申请号：US16622512

申请日：2017-09-26

Applicant: APPOTRONICS CORPORATION LIMITED

Inventor： Zhengde Zhang ,  Qiang Lv ,  Le Pan ,  Yi Li

IPC: G01J9/00

Abstract: A color wheel phase detection method and system, and a projection device. The phase detection system comprises a color wheel (1), a color wheel motor (2) that drives the color wheel (1) to rotate, and a control circuit (3); the color wheel motor (2) is a three-phase motor, and the control circuit (3) comprises a three-phase driving circuit (31) for driving the color wheel motor (2) to operate. The phase detection system further comprises a phase detection device (4) for detecting the three-phase driving circuit (31); when detecting a preset phase, the phase detection device (4) sends a pulse signal to the control circuit (3) to implement color wheel phase detection. Therefore, the effects of low costs, high accuracy, and high reliability are achieved.

公开(公告)号：US11781915B2

公开(公告)日：2023-10-10

申请号：US16622512

申请日：2017-09-26

Applicant: APPOTRONICS CORPORATION LIMITED

Inventor： Zhengde Zhang ,  Qiang Lv ,  Le Pan ,  Yi Li

IPC: G01J9/00

CPC classification number: G01J9/00

Abstract: A color wheel phase detection method and system, and a projection device. The phase detection system comprises a color wheel (1), a color wheel motor (2) that drives the color wheel (1) to rotate, and a control circuit (3); the color wheel motor (2) is a three-phase motor, and the control circuit (3) comprises a three-phase driving circuit (31) for driving the color wheel motor (2) to operate. The phase detection system further comprises a phase detection device (4) for detecting the three-phase driving circuit (31); when detecting a preset phase, the phase detection device (4) sends a pulse signal to the control circuit (3) to implement color wheel phase detection. Therefore, the effects of low costs, high accuracy, and high reliability are achieved.