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:
Oct. 17, 2006
Filed:
Dec. 01, 2000
Hiroshi Hattori, Fuwa-gun, JP;
Hiroshi Hattori, Fuwa-gun, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
An image forming device according to the invention produces a continuous gray-scale image by using a dither matrix structured by orderly tiling a plurality of dither patterns. In each dither pattern, a plurality of gray level areas are arranged in the laser scanning sequence, in correspondence with the gray levels. Dither patterns are arranged in the dither matrix such that a gray level area at the end, with respect to a laser beam scanning direction, of at least one row of one dither pattern is adjacent to the next higher gray level area of another dither pattern. By the use of such a dither matrix, the image forming device forms dots continuously in the laser scanning direction, in correspondence with the gray levels.