公开(公告)号：US20170151808A1

公开(公告)日：2017-06-01

申请号：US15313161

申请日：2014-05-29

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

Inventor： Bradley D Chung ,  Hsue-Yang Liu ,  Matthew A Shepherd ,  Mark H Mackenzie ,  Jason M Quintana

IPC: B41J2/21 ,  B41J2/01

CPC classification number: B41J2/2121 ,  B41J2/01 ,  B41J2/145 ,  B41J2/155 ,  B41J2/2146 ,  B41J2/5056 ,  B41J19/16 ,  B41J2202/20 ,  H04N1/2307 ,  H04N1/233

Abstract: Bidirectional error diffusion halftoning of data. Pixels are halftoned in one serpentine direction, and pixels are halftoned in an opposite serpentine direction.

公开(公告)号：US09782978B2

公开(公告)日：2017-10-10

申请号：US15313161

申请日：2014-05-29

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

Inventor： Bradley D Chung ,  Hsue-Yang Liu ,  Matthew A Shepherd ,  Mark H MacKenzie ,  Jason M Quintana

IPC: B41J2/21 ,  B41J2/01 ,  B41J2/505 ,  B41J2/155 ,  H04N1/23 ,  B41J19/16 ,  B41J2/145

CPC classification number: B41J2/2121 ,  B41J2/01 ,  B41J2/145 ,  B41J2/155 ,  B41J2/2146 ,  B41J2/5056 ,  B41J19/16 ,  B41J2202/20 ,  H04N1/2307 ,  H04N1/233

Abstract: A printer includes a printbar having plural dice partially overlap in the direction of rows and a halftoner. The dice receive nozzle firing data which determines when and where the individual print nozzles are to be operated in order to emit the colorant onto the media so as to form the desired printed image on a media. The halftoner is a bidirectional error diffusion halftoner that is structured to generate halftoned data. The halftoned data is mappable into the firing data. The halftoner includes a serpentine direction reverser which is structured to halftone print data image pixels in a first serpentine direction to form halftoned data and then to halftone print data image pixels in an opposite serpentine direction to form the halftoned data.

公开(公告)号：US20210129525A1

公开(公告)日：2021-05-06

申请号：US16478420

申请日：2017-01-27

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

Inventor： Huy Le ,  Bradley D Chung ,  Thomas P Abadilla ,  Jeffrey K Pew

IPC: B41J2/045 ,  G05D23/19

Abstract: In some examples, printing device temperature management may include ascertaining a print speed associated with a print job, and comparing the print speed to a print speed threshold. Printing device temperature management may further include actuating a power supply associated with a print bar at a start position of physical medium to be utilized for printing for the print job, or at or beyond a specified location along a path associated with traversal of the physical medium from the start position to a print zone to reduce an operational temperature associated with the print bar.

公开(公告)号：US10994530B1

公开(公告)日：2021-05-04

申请号：US16478420

申请日：2017-01-27

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

Inventor： Huy Le ,  Bradley D Chung ,  Thomas P Abadilla ,  Jeffrey K Pew

IPC: B41J2/045 ,  G05D23/19

Abstract: In some examples, printing device temperature management may include ascertaining a print speed associated with a print job, and comparing the print speed to a print speed threshold. Printing device temperature management may further include actuating a power supply associated with a print bar at a start position of physical medium to be utilized for printing for the print job, or at or beyond a specified location along a path associated with traversal of the physical medium from the start position to a print zone to reduce an operational temperature associated with the print bar.

公开(公告)号：US20190389206A1

公开(公告)日：2019-12-26

申请号：US16481362

申请日：2017-03-23

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

Inventor： Bradley D Chung ,  David E De Bellis ,  Lisa A Underwood

IPC: B41J2/045 ,  B41J25/308

Abstract: A process for servicing and maintaining nozzles of a print head may comprise determining an idle time of a nozzle. The determined nozzle idle time may be used as part of printing fluid drop ejection.