公开(公告)号：US20230023168A1

公开(公告)日：2023-01-26

申请号：US17778359

申请日：2019-11-22

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

Inventor： Sara ECHEVARRIA BENITO ,  Ruben RECASENS OROS ,  Alexandre RODRIGUEZ LLOFRIU

IPC: B41J2/17 ,  B41J2/21 ,  H04N1/405

Abstract: A method is disclosed. The method comprises receiving a matrix representation of a source image to be printed, the matrix representation defining a colorant value for each of a plurality of print addressable locations, wherein the colorant values are representative of amounts of print colorant to be delivered to the print addressable locations during a printing operation. The method may comprise identifying, by processing circuitry, a region in the matrix representation having a first print addressable location and an adjacent second print addressable location, wherein a difference between colorant values of the first print addressable location and the second print addressable location meets or exceeds a defined colorant value threshold. The method may comprise determining, by processing circuitry, an amount of treatment fluid to be delivered to each of the plurality of print addressable locations during the printing operation, wherein an amount of treatment fluid to be delivered in the identified region is determined to be greater than an amount of treatment fluid to be delivered to adjacent print addressable locations having colorant values which differ by less than the defined colorant value threshold. An apparatus and a machine-readable medium are also disclosed.

公开(公告)号：US20210086522A1

公开(公告)日：2021-03-25

申请号：US16977756

申请日：2018-04-23

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Li QIAN ,  Javier CASTRO SORIANO ,  Ruben RECASENS OROS

IPC: B41J2/21 ,  B41J29/393 ,  B41J2/045

Abstract: A method comprises printing an image using a printhead cartridge including a number of dies, each die comprising a nozzle array, the printing comprising: determining a drop parameter of fluid drops ejected from nozzles of the nozzle array of at least one die; comparing the drop parameter to a threshold value; and determining an image characteristic of an image to be printed; and if the image characteristic meets a defined criterion and if the drop parameter exceeds the threshold value, applying a second print mask for printing the image; and if the image characteristic does not meet the defined criterion or if the drop parameter does not exceed the threshold value, applying a first print mask for printing the image, wherein the second print mask uses less nozzles of the nozzle arrays than the first print mask.