公开(公告)号：US20230356522A1

公开(公告)日：2023-11-09

申请号：US18246158

申请日：2020-09-22

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

Inventor： Javier CASTRO SORIANO ,  Nestor LUID PINOL ,  Carles CARMONA CALPE ,  David VENDRELL TORNERO

IPC: B41J2/045 ,  B41J25/308

CPC classification number: B41J2/04505 ,  B41J2/04503 ,  B41J25/308

Abstract: A method is described in which a difference in height is determined between a current position and a calibration position of a printhead of a printer. An alignment value for the printhead is then determined based on the difference.

公开(公告)号：US20230062837A1

公开(公告)日：2023-03-02

申请号：US17411408

申请日：2021-08-25

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

Inventor： Maria VILA ABAD ,  Xavier QUINTERO RUIZ ,  David VENDRELL TORNERO ,  Carles CARMONA CALPE

IPC: B41J2/045 ,  G06F3/12

Abstract: Examples relate to computer-implemented methods for a printing system comprising a printhead, and to printing systems. A method for a printing system comprises retrieving a stored first offset applied to the printhead to align the printhead, the first offset determined based on a first user input signal; and further aligning the printhead according to a further offset determined based on a further user input signal, the further offset indicating a difference from the first offset.

公开(公告)号：US20240296301A1

公开(公告)日：2024-09-05

申请号：US18258635

申请日：2020-12-22

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

Inventor： Li QIAN ,  Maurizio BORDONE ,  Carles CARMONA CALPE

IPC: G06K15/02 ,  B29C64/393 ,  B33Y50/02 ,  G06K15/10 ,  G06K15/22

CPC classification number: G06K15/1825 ,  G06K15/027 ,  G06K15/102 ,  G06K15/1823 ,  G06K15/22 ,  B29C64/393 ,  B33Y50/02

Abstract: Examples include a method for mitigating decap in a printing system that comprises nozzles, in which printing data associated to a graphical representation and that comprise pixel data points are received. Some data points are associated with a corresponding nozzle and a corresponding direction of movement and at least one specific data point is associated with a specific direction of movement and a specific nozzle which has a decap time below a first predetermined threshold. The received printing data is modified by displacing the printing data of the specific data point in a direction opposite to the specific direction of movement in order to compensate for the decap time.

公开(公告)号：US20230162465A1

公开(公告)日：2023-05-25

申请号：US18153073

申请日：2023-01-11

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

Inventor： Carles CARMONA CALPE ,  Jordina TORRENTS BARRENA ,  Marcos CASALDALIGA ALBISU

IPC: G06V10/22 ,  H04N1/60 ,  G06F18/23213

CPC classification number: G06V10/22 ,  H04N1/6075 ,  G06F18/23213

Abstract: In some examples, a system detects a highlighted area in an image content. The system applies a color adjustment process in the highlighted area. The color adjustment process is not applied in areas of the image content outside the highlighted area, and the color adjustment process includes an operation of adjusting a color of the highlighted area. The adjusting of the colors of the highlighted area includes adjusting a color value of a specified color space.

公开(公告)号：US20240208228A1

公开(公告)日：2024-06-27

申请号：US18557635

申请日：2021-04-28

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

Inventor： Gianni CESSEL ,  Carles CARMONA CALPE ,  Marcos CASALDALIGA ALBISU ,  Pablo Carmelo MENA RODRIGUEZ ,  Lluis ABELLO ROSELLO ,  Ma. Pilar VELAZQUEZ GOMEZ ,  Ricard SILVESTRE ,  Jaume VERGES LLAHI ,  Dorkaitz Alain VAZQUEZ FERNANDEZ ,  Jordina TORRENTS BARRENA ,  Maurizio BORDONE

IPC: B41J2/165 ,  B41J2/045 ,  B41J2/21

CPC classification number: B41J2/16579 ,  B41J2/0451 ,  B41J2/04586 ,  B41J2/16535 ,  B41J2/2139 ,  B41J2/2142 ,  B41P2235/20

Abstract: A print apparatus is disclosed. The print apparatus comprises a print fluid application unit having a plurality of nozzles through which print fluid is to be deposited onto a printable medium during a printing operation. The print apparatus also comprises a nozzle cleaning surface to engage nozzles during a nozzle cleaning operation. The print apparatus also comprises a scanning unit and a controller. The controller is to control the print fluid application unit to deposit print fluid from nozzles of the plurality of nozzles according to an intended pattern onto the nozzle cleaning surface: control the scanning unit to scan the pattern formed on the nozzle cleaning surface: and responsive to determining. based on the scan, that print fluid from a nozzle of the plurality of nozzles has not been deposited according to the intended pattern, generate an instruction signal regarding maintenance of the print fluid application unit. A method and a machine-readable medium are also disclosed.

公开(公告)号：US20230267294A1

公开(公告)日：2023-08-24

申请号：US18004063

申请日：2020-07-02

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

Inventor： Marcos CASALDALIGA ALBISU ,  Maurizio BORDONE ,  Li QIAN ,  Carles CARMONA CALPE

IPC: G06K15/02 ,  G06K15/00 ,  B41J2/205 ,  B41J2/21

CPC classification number: G06K15/188 ,  G06K15/408 ,  B41J2/2056 ,  B41J2/2132

Abstract: A colorant value adjustment method is disclosed. The method comprises obtaining data defining colorant values for a plurality of print addressable locations representative of pixels of an image to be printed during a printing operation, wherein each colorant value is representative of an amount of colorant to be delivered from a print nozzle to a corresponding print addressable location as the print nozzle moves between the print addressable locations during the printing operation. The method comprises determining, based on the obtained data, a measure of time that the print nozzle is not to deposit colorant immediately prior reaching a first print addressable location. The method comprises determining, based on the determined measure of time, an adjustment to be applied to the colorant value at the first print addressable location. The method comprises applying the adjustment to the colorant value for the first print addressable location. An apparatus and a machine-readable medium are also disclosed.