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：US20220363072A1

公开(公告)日：2022-11-17

申请号：US17771384

申请日：2019-11-05

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

Inventor： Wesley R. SCHALK ,  Jay S. GONDEK ,  Jason M. QUINTANA

IPC: B41J2/355 ,  B41J3/60 ,  B41J3/36

Abstract: In one example in accordance with the present disclosure, a printing device is described. The printing device includes a single thermal printhead that includes an array of heating elements. The array of heating elements are selectively powered to form content on both sides of thermal media passing thereby. Different sides of the thermal media have thermal dye layers with different activation sensitivities. The printing device also includes a media transport system to move the thermal media by the single thermal printhead. A controller of the printing device generates printed content on both sides of the thermal media in a single pass by powering the single thermal printhead based on both content to be formed on a first side and content to be formed on a second side.

公开(公告)号：US20220379628A1

公开(公告)日：2022-12-01

申请号：US17771987

申请日：2019-11-26

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

Inventor： Wesley SCHALK ,  Jay S. GONDEK ,  Jason M. QUINTANA ,  David BUCK

IPC: B41J2/355 ,  B41J2/525

Abstract: An image forming apparatus comprising a thermal printhead and a controller. The thermal printhead has heating elements. The controller is to receive an indicated print mode corresponding to a type of thermal medium to be used, determine a power profile based on the indicated print mode, and control power to be delivered to the thermal printhead based on the determined power profile.