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. 28, 2020
Filed:
Mar. 08, 2018
Canon Kabushiki Kaisha, Tokyo, JP;
Keisuke Kobayashi, Utsunomiya, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An image projection apparatus displays includes a lens attachable portion to which a plurality of projection lenses having different optical characteristics are interchangeably attached, a drive signal producer configured to produce, for each color light beam, a drive signal used to drive the light modulation element based on an input image signal, and an information acquirer configured to acquire information on an optical characteristic of the projection lens attached to the lens attachable portion. The information on the optical characteristic of the projection lens contains information on a chromatic aberration of the projection lens. The drive signal producer reduces influence of a shift below the modulation pixel caused by the chromatic aberration of the projection lens by using the information on the optical characteristic, and produces the drive signal corresponding to at least one of the plurality of color light beams.