公开(公告)号：US20240198676A1

公开(公告)日：2024-06-20

申请号：US18538324

申请日：2023-12-13

Applicant: CANON KABUSHIKI KAISHA

Inventor： SHINGO NISHIOKA ,  TAKAYOSHI KIKUCHI ,  HAJIME NAGAI ,  SHIN GENTA ,  AYUMI YASUDA ,  KEIJI KURIYAMA ,  SERENA YOSHIKAWA ,  SATOSHI WADA ,  FUMIHIRO GOTO ,  DAISUKE YOSHITOKU ,  NAOKO BABA ,  HIROSHI KAWAFUJI ,  YOSHIYUKI HONDA ,  AKIHIRO MOURI ,  SHUNSUKE KAKEI

IPC: B41J2/15 ,  B41J2/21 ,  B41J3/62

CPC classification number: B41J2/15 ,  B41J2/21 ,  B41J3/62

Abstract: A printing apparatus includes a printing-medium conveyance unit, a printhead, and a control unit. The printhead has a first array of ejection ports ejecting a first ink and a second array of ejection ports ejecting a second ink, with the ports arranged in a printing-medium conveyance direction and the arrays arranged in a predetermined direction intersecting the conveyance direction. The control unit performs control to print an image of a foundation layer and images in stack and non-stack regions on the printing medium by having the conveyance unit convey the printing medium while scanning the printhead. The control unit performs control so that in printing in the non-stack region, the image of the foundation layer is printed using an ejection-port group in the first array at the same position as an ejection-port group in the second array for printing the image in the non-stack region, in an ejection-port arrangement direction.

公开(公告)号：US20250117609A1

公开(公告)日：2025-04-10

申请号：US18904665

申请日：2024-10-02

Applicant: CANON KABUSHIKI KAISHA

Inventor： YUKI MORITA ,  SATOSHI WADA ,  SHINGO NISHIOKA ,  AYUMI YASUDA ,  NAOKO BABA ,  TAKUMI OTANI

IPC: G06K15/10 ,  G06K15/02

Abstract: A printing apparatus operable to form dots on a printing medium by repeating a forward scan and a backward scan comprises a generation unit configured to generate first data of a dot pattern to be formed in a forward scan and second data of a dot pattern to be formed in a backward scan. The generation unit generates the first data and the second data such that the dot pattern to be formed in the forward scan and the dot pattern to be formed in the backward scan have either a blue noise characteristic or a green noise characteristic as a spatial frequency characteristic, and the number of dots to be formed in the forward scan and the number of dots to be formed in the backward scan are substantially the same.

公开(公告)号：US20250083452A1

公开(公告)日：2025-03-13

申请号：US18802178

申请日：2024-08-13

Applicant: CANON KABUSHIKI KAISHA

Inventor： AYUMI YASUDA ,  KEIJI KURIYAMA ,  SERENA SAITO ,  HAJIME NAGAI ,  SHINGO NISHIOKA ,  SHIN GENTA ,  SATOSHI WADA

IPC: B41J2/21 ,  B41J11/00 ,  B41M3/00

Abstract: A printing apparatus includes a feed unit that feeds a printing medium; a print unit including first and second arrays of print elements for applying first ink and second ink, respectively, onto the printing medium; and a fixation unit located downstream of the print unit in a feed direction to fixate an image printed on the printing medium. The print unit prints a first image on the printing medium by applying the first ink. The feed unit feeds the printing medium having the first image printed thereon to the fixation unit from upstream to downstream in the feed direction. The fixation unit fixates the first image. The feed unit back-feeds the printing medium having the first image fixated thereon to the print unit from downstream to upstream in the feed direction. The print unit prints a second image on the first image by applying the second ink.