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:
Nov. 25, 2008
Filed:
Oct. 27, 2004
Hiroshi Asai, Kyoto, JP;
Yasuhiro Takemoto, Kyoto, JP;
Hiroshi Asai, Kyoto, JP;
Yasuhiro Takemoto, Kyoto, JP;
Dainippon Screen Mfg. Co., Ltd., Kyoto, JP;
Abstract
Halftone cells each serving as a unit for formation of a dot are arranged in irregular shapes at random and divided into two groups. The halftone cells () in the first group are fewer than the halftone cells () in the second group and dispersed, and the area of each of the halftone cells () in the first group is set larger than that in the second group. The dot growth speed of the halftone cells () in the first group is higher than that of the halftone cells () in the second group. This allows formation of fine halftone dots consisting of the halftone cells in the first and second groups, and it is possible to reduce banding appearing in a main scan direction during recording of the halftone dots, with low-frequency components in spatial frequency of the halftone dots caused by the halftone cells () in the first group.