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公开(公告)号：US20190170542A1
公开(公告)日：2019-06-06
申请号：US15939523
申请日：2018-03-29
Applicant: PixArt Imaging Inc.
Inventor： CHUNG-TING YANG , KAI-HO TSAI , SHIH-KUAN LIU
Abstract: The present disclosure is related a technology of confirming a position using an optical sensor to detect reflected light coming through a through hole formed at a predetermined position on a rotation device. In the present disclosure, the optical sensor and a light source are formed at the same side of a rotatable element so as to reduce the occupied space and simplify the manufacturing process.
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