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. 13, 2007
Filed:
Mar. 17, 2005
Noriaki Miyasaka, Okaya, JP;
Noriaki Miyasaka, Okaya, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A CPUacquires a zoom volume Z conveyed by a zoom lens position detector, and calculates a light valve white area Sq according to that zoom volume Z. The CPUrevises the adjustment pattern image based on the calculated light valve white area Sq, rewrites the contents of the pattern image memory, and gives instructions to project the image to an image processing unit, and a liquid crystal light valve drive unit, etc. On the liquid crystal light valveis formed a pattern image for which the white part area is revised to Sq, and that revised pattern image is enlarged and projected for display on the screen. The CPUgives instruction for sense to the imaging control unit By doing this, even when the zoom position of the zoom lens changes, it is possible to have the average value of the gradation value of the white part for the sensed image approximately maintain the desired gradation value.