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:
Feb. 14, 2006
Filed:
Mar. 31, 2005
Dong Won Choi, Suwon, KR;
Dong Won Choi, Suwon, KR;
Samsung Electro-Mechanics Co., Ltd., Suwon, KR;
Abstract
Disclosed herein is a dynamic aperture driving apparatus for adjusting the amount of light of a projection optical system and a method of controlling the same. The system includes a rotation means, a driving means, a first detection means and a first detection means. The rotation means is connected at the upper end thereof to the dynamic aperture to be rotated to the right and left within a range of rotating angles. The driving means rotates the rotation means to the right and left according to a predetermined electric signal. The first detection means detects the position of the rotation means using a Hall effect. The second detection means detects the operational error of the first detection means due to variation in temperature.