公开(公告)号：US20220001675A1

公开(公告)日：2022-01-06

申请号：US17258469

申请日：2019-03-29

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

Inventor： Praveen Boppana ,  Ranjit Bhaskar ,  Jay S. Gondek

IPC: B41J2/36 ,  B41J2/355 ,  B41J2/375

Abstract: An example is given of a non-transitory computer-readable medium to store machine-readable instructions to be executed by a controller. The controller controls a heating element to print pixels of an image. The controller calculates an estimated thermal energy accumulation based on control of the heating element. The controller controls the heating element to print subsequent pixels based on the estimated thermal energy accumulation.

公开(公告)号：US11445089B2

公开(公告)日：2022-09-13

申请号：US16609473

申请日：2018-05-15

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

Inventor： Morgan T. Schramm ,  Wesley R. Schalk ,  Ranjit Bhaskar

IPC: H04N1/00 ,  H04N1/405 ,  H04N1/52

Abstract: An image file is prepared for printing. The image file is received. The image file includes a cell having pixels. A pixel of the pixels of the cell corresponds with a command to apply a print substance to a medium. For the pixel, the command to apply the print substance is selectively replaced with a command to not apply the print substance.

公开(公告)号：US11258926B2

公开(公告)日：2022-02-22

申请号：US16609462

申请日：2018-04-27

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

Inventor： Morgan T. Schramm ,  Ranjit Bhaskar ,  Jesse Sutherland ,  Wesley R. Schalk

IPC: H04N1/60 ,  G06F3/12

Abstract: An example color resource is generated. A source color from a first color space is converted to a corresponding greyscale color in a greyscale color space. The greyscale color includes a first luminosity amount. A black channel amount is adjusted to a depletion color from a second color space to form a target color in the second color space. The depletion color corresponds with a transformation of the source color into the second color space. The depletion color includes a second luminosity amount, and adjusting the black channel includes matching the second luminosity amount in the target color with the first luminosity amount.

公开(公告)号：US20210122178A1

公开(公告)日：2021-04-29

申请号：US16661028

申请日：2019-10-23

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

Inventor： Angel Astorgano-Ballesteros ,  Ranjit Bhaskar ,  Praveen Boppana ,  Stuart Douglas Spencer

IPC: B41M5/385 ,  B41J25/308 ,  B41J29/393

Abstract: In one example in accordance with the present disclosure, a printing system is described. The printing system includes a media sensor to detect a presence of media at a particular point within the printing system. A stepper motor moves media through the printing system. A controller 1) monitors, for at least one pass of the media, a number of steps of the stepper motor to pass the media between the media sensor and a print position, 2) stores the number of steps of the stepper motor in a memory device, and 3) adjusts operation of subsequent passes of the media based on stored number of steps. A memory device of the printing system stores the number of steps of the stepper motor, for at least one pass of the media.

公开(公告)号：US20210368069A1

公开(公告)日：2021-11-25

申请号：US16609480

申请日：2018-05-15

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

Inventor： Morgan T Schramm ,  Ranjit Bhaskar

IPC: H04N1/60

Abstract: A color table is modulated. The color table includes nodes that correspond with a color input in a first color space and provides a print substance formulation in a second color space. For a set of the nodes, a determination is made as to whether a color amount based on the print substance formulation is outside of threshold value. For each node in which the color amount for the node is outside the threshold value, the print substance formulation is replaced with a replacement print substance formulation having a color amount that is within the threshold value.

公开(公告)号：US20210337083A1

公开(公告)日：2021-10-28

申请号：US16609462

申请日：2018-04-27

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

Inventor： Morgan T. Schramm ,  Ranjit Bhaskar ,  Jesse Sutherland ,  Wesley R. Schalk

IPC: H04N1/60 ,  G06F3/12

Abstract: An example color resource is generated. A source color from a first color space is converted to a corresponding greyscale color in a greyscale color space. The greyscale color includes a first luminosity amount. A black channel amount is adjusted to a depletion color from a second color space to form a target color in the second color space. The depletion color corresponds with a transformation of the source color into the second color space. The depletion color includes a second luminosity amount, and adjusting the black channel includes matching the second luminosity amount in the target color with the first luminosity amount.

公开(公告)号：US11647146B2

公开(公告)日：2023-05-09

申请号：US17519913

申请日：2021-11-05

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

Inventor： Morgan T. Schramm ,  Ranjit Bhaskar ,  Jesse Otto Sutherland ,  Wesley R. Schalk

IPC: H04N1/60 ,  G06F3/12

CPC classification number: H04N1/603 ,  G06F3/1208 ,  H04N1/6008 ,  H04N1/6066

Abstract: Example color resources are generated. A first luminosity amount of a greyscale color in a greyscale color space is determined. The greyscale color corresponds with a transformation of a source color in a first color space converted to the greyscale color. The source color corresponding with a depletion color in a second color space, and the depletion color has a second luminosity amount. A target color in a color resource is generated via adjusting a black channel amount in the depletion color to match the second luminosity amount with the first luminosity amount. The target color to correspond with the source color in the color resource.

公开(公告)号：US11214083B2

公开(公告)日：2022-01-04

申请号：US16661028

申请日：2019-10-23

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

Inventor： Angel Astorgano-Ballesteros ,  Ranjit Bhaskar ,  Praveen Boppana ,  Stuart Douglas Spencer

IPC: B41J13/00 ,  B41J11/00 ,  B41J29/393 ,  B41J25/308 ,  B41J29/38

Abstract: In one example in accordance with the present disclosure, a printing system is described. The printing system includes a media sensor to detect a presence of media at a particular point within the printing system. A stepper motor moves media through the printing system. A controller 1) monitors, for at least one pass of the media, a number of steps of the stepper motor to pass the media between the media sensor and a print position, 2) stores the number of steps of the stepper motor in a memory device, and 3) adjusts operation of subsequent passes of the media based on stored number of steps. A memory device of the printing system stores the number of steps of the stepper motor, for at least one pass of the media.

公开(公告)号：US20210409572A1

公开(公告)日：2021-12-30

申请号：US16609473

申请日：2018-05-15

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

Inventor： Morgan T. Schramm ,  Wesley R. Schalk ,  Ranjit Bhaskar

IPC: H04N1/405

Abstract: An image file is prepared for printing. The image file is received. The image file includes a cell having pixels. A pixel of the pixels of the cell corresponds with a command to apply a print substance to a medium. For the pixel, the command to apply the print substance is selectively replaced with a command to not apply the print substance.

公开(公告)号：US20210368068A1

公开(公告)日：2021-11-25

申请号：US16499307

申请日：2018-04-27

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

Inventor： Wesley R Schalk ,  Morgan T. Schramm ,  Jesse Sutherland ,  Ranjit Bhaskar ,  Erik A Anderson

IPC: H04N1/60 ,  G06F3/12

Abstract: An example printing device and method of the printing device is disclosed. A print substance formulation is modulated based on the process characteristic for a selected medium. A print substance is delivered to the selected medium according to the modulated print substance formulation.