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. 07, 2006
Filed:
Nov. 18, 1999
Masahiko Murata, Chofu, JP;
Tomoo Iizumi, Omiya, JP;
Masahiko Murata, Chofu, JP;
Tomoo Iizumi, Omiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
If Y, M, C, and K color component images are serially generated by one color component image generating device in four steps, it takes much time to perform image processing for printing a one-page full-color image. This makes it impossible to increase the printing speed. In addition, since conversion to Y, M, C, and K data is performed before rendering, rendering logic cannot be faithfully implemented, resulting in poor color reproducibility. In order to solve these problems, image generating devices () respectively render R, G, and B color component images in bitmap memoriesto, which are divided into areas in units of predetermined bands obtained by dividing a page, on the basis of a display list which is common to R, G, and B data and stored in a memory (). The rendered color component images on a band basis are converted into C, M, Y, and K color component images by a color space converter () in synchronism with the operation of a printer engine.