公开(公告)号：US20210300060A1

公开(公告)日：2021-09-30

申请号：US17057765

申请日：2018-10-31

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Jay S. GONDEK ,  Jason M. QUINTANA ,  Weiyun SUN

IPC: B41J2/32 ,  G06K15/02

Abstract: In some examples, simultaneous color development for thermally activated print media may include ascertaining an input image that is to be printed using a thermal printhead. Colors that are to be printed may be determined for a plurality of specified pixels of the input image. A plurality of frequencies may be clustered to print each color of the determined colors. Based on the clustered plurality of frequencies, operation of a printhead that is to print the plurality of specified pixels may be controlled.

公开(公告)号：US20210206171A1

公开(公告)日：2021-07-08

申请号：US16074835

申请日：2017-04-13

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： James D. PLYMALE ,  Donnell D. DANIELS ,  Kyle MANNARI ,  Jeffrey A. WAGNER ,  Weiyun SUN ,  Rachelle COBB

IPC: B41J2/165

Abstract: Printers and associated printer maintenance methods and apparatus are disclosed. An example printer includes a nozzle to dispense fluid; a wiper to wipe the nozzle during a maintenance event; and a controller to cause the nozzle to dispense fluid during the maintenance event while the wiping material engages or is immediately adjacent the nozzle to deter a substance from being present within the nozzle.