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Patent Searching and Data


Title:
COLOR WHEEL PHASE DETECTION METHOD AND SYSTEM, AND PROJECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/233115
Kind Code:
A1
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 apparatus (4) for detecting the three-phase driving circuit (31); when detecting a preset phase, the phase detection apparatus (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.

Inventors:
ZHANG ZHENGDE (CN)
LV QIANG (CN)
PAN LE (CN)
LI YI (CN)
Application Number:
PCT/CN2017/103438
Publication Date:
December 27, 2018
Filing Date:
September 26, 2017
Export Citation:
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Assignee:
APPOTRONICS CORP LTD (CN)
International Classes:
G01J9/00
Foreign References:
CN102809664A2012-12-05
CN101232624A2008-07-30
CN104730821A2015-06-24
CN1655625A2005-08-17
KR20120026761A2012-03-20
CN103728824A2014-04-16
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