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公开(公告)号：US12277354B2
公开(公告)日：2025-04-15
申请号：US18185819
申请日：2023-03-17
Applicant: Hewlett-Packard Development Company, L.P.
Abstract: In example implementations, a method, a device, and a program are provided. The method includes detecting a power increase movement of a printer carriage. A location of the printer carriage is detected at a time of the detected power increase. Based on the detected location of the printer carriage, determine whether the print medium is damaged. The device includes a power monitor to detect a power increase during movement of a printer carriage. A locator detects a location of the printer carriage at the time of the detected power increase. A damage determiner determines, based on the detected location of the printer carriage, whether the print medium is damaged. The program detects a power increase during movement of a printer carriage. Location of printer carriage is detected at time of detected power increase. Based on detected location of the printer carriage, it is determined whether the print medium is damaged.
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公开(公告)号：US11745502B2
公开(公告)日：2023-09-05
申请号：US17419345
申请日：2019-07-15
Applicant: Hewlett-Packard Development Company, L.P.
CPC classification number: B41J2/04536 , B41J2/0451 , B41J2/2139
Abstract: In an example, a printing apparatus includes a controller, wherein the controller may be to compare a historic usage of a first printhead nozzle with a historic usage of a second printhead nozzle which is located on a same printhead as the first nozzle. The controller may be to determine that the historic usage of the first nozzle is higher than the historic usage of the second nozzle, and in response identify a currently operational third printhead nozzle, for which the second nozzle is able to compensate; and turn off the third nozzle, and operate the second nozzle at a higher firing frequency to compensate for the third nozzle.
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公开(公告)号：US20220088922A1
公开(公告)日：2022-03-24
申请号：US17419408
申请日：2019-06-07
Applicant: Hewlett-Packard Development Company, L.P.
IPC: B41J2/045
Abstract: Example implementations relate to a method to manage printhead operational life; the method comprising firing at least one nozzle of a printhead according to an associated firing parameter to produce a respective drop of print liquid, measuring a parameter associated with the drop of print liquid, and adjusting the firing parameter in response to the measuring to reduce the measured parameter associated with the drop of print liquid on a subsequent firing while maintaining the firing parameter at or above a predetermined parameter limit to maintain print image quality.
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公开(公告)号：US20220072883A1
公开(公告)日：2022-03-10
申请号：US17417256
申请日：2019-04-11
Applicant: Hewlett-Packard Development Company, L.P.
IPC: B41J29/393 , B41J11/00 , B41J29/26 , G06F3/12
Abstract: There is disclosed a device, method and program, wherein the method comprises detecting a power increase, during which power usage increases by at least a threshold amount over an expected power usage during movement of a printer carriage over a print medium along a scan axis. The increase method further comprises detecting a location of the printer carriage at a time of the detected power usage increase and determining, based on the detected location of the printer carriage, whether the print medium is damaged.
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公开(公告)号：US11635924B2
公开(公告)日：2023-04-25
申请号：US17417256
申请日：2019-04-11
Applicant: Hewlett-Packard Development Company, L.P.
IPC: B41J29/393 , B41J11/00 , B41J29/26 , G06F3/12
Abstract: There is disclosed a device, method and program, wherein the method comprises detecting a power increase, during which power usage increases by at least a threshold amount over an expected power usage during movement of a printer carriage over a print medium along a scan axis. The increase method further comprises detecting a location of the printer carriage at a time of the detected power usage increase and determining, based on the detected location of the printer carriage, whether the print medium is damaged.
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Patent Agency Ranking
公开(公告)号：US20220324226A1
公开(公告)日：2022-10-13
申请号：US17228915
申请日：2021-04-13
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Abstract: In one example in accordance with the present disclosure, a method, system, and non-transitory machine-readable storage medium are described. A drop characteristic measurement of a drop of print fluid ejected from a printhead is detected. The drop characteristic measurement includes at least one of a drop velocity and a drop weight. The drop characteristic measurement is compared against a threshold value. When the drop characteristic measurement is beyond the threshold value, a remedial action is triggered.
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公开(公告)号：US20220126571A1
公开(公告)日：2022-04-28
申请号：US17419345
申请日：2019-07-15
Applicant: Hewlett-Packard Development Company, L.P.
Abstract: In an example, a printing apparatus includes a controller, wherein the controller may be to compare a historic usage of a first printhead nozzle with a historic usage of a second printhead nozzle which is located on a same printhead as the first nozzle. The controller may be to determine that the historic usage of the first nozzle is higher than the historic usage of the second nozzle, and in response identify a currently operational third printhead nozzle, for which the second nozzle is able to compensate; and turn off the third nozzle, and operate the second nozzle at a higher firing frequency to compensate for the third nozzle.
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公开(公告)号：US20220024202A1
公开(公告)日：2022-01-27
申请号：US17311617
申请日：2019-01-30
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Abstract: There is disclosed a printhead control method, printhead controller and printer. The method may comprise determining whether ink drop variability is likely to occur based on a first time period in which a printhead is uncovered during a print action but before printing begins, and a second time period that is a minimum period for ink drop variability to occur when the printhead is uncovered. The method may further comprise setting a printhead firing frequency for the print action based on the determination.
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公开(公告)号：US11872811B2
公开(公告)日：2024-01-16
申请号：US17419408
申请日：2019-06-07
Applicant: Hewlett-Packard Development Company, L.P.
IPC: B41J2/045
CPC classification number: B41J2/04513 , B41J2/0456 , B41J2/0458 , B41J2/04561 , B41J2/04563 , B41J2/04581
Abstract: Example implementations relate to a method to manage printhead operational life; the method comprising firing at least one nozzle of a printhead according to an associated firing parameter to produce a respective drop of print liquid, measuring a parameter associated with the drop of print liquid, and adjusting the firing parameter in response to the measuring to reduce the measured parameter associated with the drop of print liquid on a subsequent firing while maintaining the firing parameter at or above a predetermined parameter limit to maintain print image quality.
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公开(公告)号：US11699055B2
公开(公告)日：2023-07-11
申请号：US17446311
申请日：2021-08-30
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Marc Gené Alujas , Joan Albert Jorba Closa , Andrei Alexandru Dafinoiu
IPC: G06K15/00
CPC classification number: G06K15/408 , G06K2215/0085 , G06K2215/101
Abstract: In some examples, a system detects an error in an printing device, and selects a combination of a medium advance error correction process to address a medium advance error and a faulty nozzle correction process to address a faulty nozzle, where the selecting of the combination is from a plurality of different combinations of the medium advance error correction process and the faulty nozzle correction process, and the selecting is based on a criterion relating to an interaction between the medium advance error and faulty nozzle correction processes.
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