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:
Nov. 19, 2013
Filed:
Dec. 01, 2010
Fu-shiung Shih, Tai-Chung Hsien, TW;
Chun-ming Shen, Taipei, TW;
Fu-Shiung Shih, Tai-Chung Hsien, TW;
Chun-Ming Shen, Taipei, TW;
Qisda Corporation, Taoyuan County, TW;
Abstract
An optical sensing apparatus with anti-dust structure, for sensing a rotation device which has a rotation surface rotating along a rotation direction, includes a base, an optical sensor, and a stop block. The stop block is located beside the optical sensor and disposed with the optical sensor on the base in accordance with the order of the rotation direction. A distance between a stagnation surface of the stop block and the rotation surface is shorter than a distance between a sensing surface of the optical apparatus and the rotation surface. When an air flow passes between the stagnation surface and the rotation surface, dust within the air flow could be partially deposited on the stagnation surface so as to reduce the deposition amount of the dust on the sensing surface. A filter apparatus with the optical sensing apparatus and a projector with the filter apparatus are also disclosed.