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:
Apr. 15, 2008
Filed:
Aug. 30, 2005
Sea-huang Lee, Miao-Li County, TW;
Shou-chih Cheng, Miao-Li County, TW;
Sea-Huang Lee, Miao-Li County, TW;
Shou-Chih Cheng, Miao-Li County, TW;
Corentronic Corporation, Miao-Li County, TW;
Abstract
An optical projection device including a light source, a housing, an imaging unit, a projection lens and a dust protection device is provided. The light source is adopted for providing a light beam. The housing has a projection-lens-assembling opening. The imaging unit is disposed in the housing, and on the transmission path of the light beam. In addition, the projection lens in the housing, and exposed by the projection-lens-assembling opening. The dust protection device is disposed between the projection lens and the projection-lens-assembling opening. The optical projection device is thus protected from dust and displaying quality thereof is excellent.