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. 12, 2005
Filed:
Jan. 29, 2002
Minoru Teshigawara, Kanagawa, JP;
Naoji Otsuka, Kanagawa, JP;
Hitoshi Sugimoto, Kanagawa, JP;
Kiichiro Takahashi, Kanagawa, JP;
Hitoshi Nishikori, Tokyo, JP;
Osamu Iwasaki, Tokyo, JP;
Takeshi Yazawa, Kanagawa, JP;
Toshiyuki Chikuma, Kanagawa, JP;
Minoru Teshigawara, Kanagawa, JP;
Naoji Otsuka, Kanagawa, JP;
Hitoshi Sugimoto, Kanagawa, JP;
Kiichiro Takahashi, Kanagawa, JP;
Hitoshi Nishikori, Tokyo, JP;
Osamu Iwasaki, Tokyo, JP;
Takeshi Yazawa, Kanagawa, JP;
Toshiyuki Chikuma, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A printing apparatus can reduce degradation in print quality of a printed image, notably in a highlight portion or an intermediate gradation portion, in the case where the image is printed by forming dots of a plurality of sizes. Specifically, data causing larger and smaller cyan ink droplets, respectively, to be ejected is independently subjected to a conversion to n-value process. Thus, the data for larger ink droplets is present in a portion of printing data which corresponds to the highlight portion or intermediate gradation portion of the image. During printing, larger dots are formed in this area, thereby making it difficult to perceive possible stripes caused by the offset of the positions at which smaller droplets impact a sheet.