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公开(公告)号：US20240028853A1
公开(公告)日：2024-01-25
申请号：US18263396
申请日：2021-01-29
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Maria Nieves TORRES PLANELLS , Javier CASTRO SORIANO , Alexandre RODRIGUEZ LLOFRIU , Maurizio BORDONE
IPC: G06K15/02
CPC classification number: G06K15/188 , G06K15/1884
Abstract: A print mode determination method is disclosed. The method comprises receiving image data defining parameters of pixels of an image to be printed using a print apparatus; identifying, based on the image data, a first fill area in the image that exceeds a defined threshold area, wherein the first fill area is to be printed in a first color; determining, based on the image data, a first proportion of print agent of each of a plurality of colors to be used to print the first color; and determining, based on the determined first proportions of print agent, a print mode to be used by the print apparatus to print the image. An apparatus and a machine-readable medium are also disclosed.
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公开(公告)号：US20240059083A1
公开(公告)日：2024-02-22
申请号：US18259527
申请日：2021-01-27
Applicant: Hewlett-Packard Development Company, L.P.
IPC: B41J15/16
CPC classification number: B41J15/165
Abstract: In one example, the tension in a print media may be determined in a region between a roller for unwinding the print media and a print zone. In this example, the rotational speed of the roller may be controlled based on the determined tension of the print media.
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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.
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.
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公开(公告)号：US20230322007A1
公开(公告)日：2023-10-12
申请号：US18042803
申请日：2020-08-27
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Pau COSTAL FORNELLS , Andreas MÜLLER , Alexandre RODRIGUEZ LLOFRIU
IPC: B41M5/00
CPC classification number: B41M5/0017
Abstract: A printing system may be provided and the printing system may comprise, in an example, a controller, wherein the controller may cause a printing mechanism to selectively apply pre-treatment fluid and marking fluid on a recorded medium. The printing mechanism may comprise a first printhead to dispense pre-treatment fluid and a second printhead to dispense marking fluid, wherein the first printhead is arranged in line with the second printhead. The controller may cause the printing system to enter a first print mode, wherein in the first print mode, there are a plurality of passes of a printing mechanism where pre-treatment fluid and/or marking fluid is applied to the recorded medium, and wherein a first of the plurality of passes is to be of the pre-treatment fluid from the first printhead without the second printhead dispensing marking fluid.
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