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. 06, 1993
Filed:
Jun. 03, 1991
Applicant:
Inventors:
Susumu Tsujihara, Neyagawa, JP;
Yasuaki Sakanishi, Ibaraki, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358 60 ; 358 64 ; 358 10 ; 31536813 ;
Abstract
An image correction apparatus in which adjustment of a projector unit for widening projection with a plurality of projector tubes can be eliminated by setting specifications of the projecting optical system and by automatically calculating converging angles at which images of light of respective colors are formed on a screen, so as to automatically compute various correction data for geometrical distortion, luminance reduction and focus error.