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. 14, 1992
Filed:
Jan. 09, 1990
Shigeo Ogino, Osaka, JP;
Yoshihiko Hirota, Osaka, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
An image forming device which can form an image by printing a plurality of dots based on an image information that contains a plurality of density data corresponding to a plurality of pixels defined by the fractionalization of the original image, and which can express the density of an image by controlling the number of dots to be printed within a predetermined tone unit area. The image forming device includes a threshold pattern generator for generating a threshold pattern which is a repetition of a basic pattern including a predetermined number 'L' of thresholds, a comparator for comparing respective density data with a predetermined number 'M' of thresholds selected from all 'L' of the thresholds in which 'L' is not an integer multiple of 'M', and for producing a predetermined number 'M' of print data corresponding to the respective density data; and a printer for printing on a printing sheet dots corresponding to the 'M' print data in a line along a main scanning direction.