公开(公告)号：US11167496B2

公开(公告)日：2021-11-09

申请号：US16074217

申请日：2016-09-20

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

Inventor： Wesley R Schalk ,  Matthew A Shepherd ,  Pierre J Kaiser ,  Al Olson

IPC: B29C64/393 ,  B29C64/153 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B29C64/35 ,  B29C64/165 ,  B29C64/25 ,  B33Y40/20

Abstract: According to one example, there is provided a method of generating three-dimensional objects in a three-dimensional printing system comprising a pair of movable build modules. The method comprises moving a first build module into a build position, executing a 3D print job in the first build module, moving the first build module into a post-build position, performing post-processing operations on the first build module, moving a second build module into the build position, and executing a 3D print job in the second build module.

公开(公告)号：US10602020B2

公开(公告)日：2020-03-24

申请号：US16337087

申请日：2016-10-31

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

Inventor： Jay S Gondek ,  Jason M Quintana ,  Matthew A Shepherd

IPC: H04N1/405 ,  H04N1/409 ,  B41J2/205

Abstract: In some examples, dynamic threshold based error diffusion may include determining whether a pixel associated with a pattern to be printed includes a lighter tone or a darker tone compared to an adjacent pixel. In response to a determination that the pixel associated with the pattern to be printed includes the lighter tone or the darker tone compared to the adjacent pixel, a firing threshold may be respectively increased or decreased to respectively decrease or increase a likelihood of printing of the pattern.

公开(公告)号：US20180297382A1

公开(公告)日：2018-10-18

申请号：US15767294

申请日：2016-02-16

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

Inventor： Mark H MacKenzie ,  Matthew A Shepherd ,  Vanessa Verzwyvelt ,  Bruce A Axten ,  Weiyun Sun

IPC: B41J25/308 ,  B41J2/155 ,  B41J13/00

Abstract: A method for inkjet nozzle spitting including conveying pages in a print direction along a transport through a printzone of a wide array printhead formed by a plurality of rows of nozzles disposed crosswise to the print direction, the nozzles to eject ink drops in accordance with print data. The method further includes maintaining a gap between pages as the gap moves through the printzone, and providing spit pattern data as print data to the printhead to successively activate each row of nozzles, in the print direction and in synchronism with movement of the gap, to eject ink drops from all nozzles of the row so that a position of the activated row of nozzles is maintained within the gap as the gap continuously moves through the printzone.

公开(公告)号：US11364687B2

公开(公告)日：2022-06-21

申请号：US16605067

申请日：2018-04-10

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

Inventor： Sergio Gonzalez ,  Matthew A Shepherd ,  Scott White ,  Barret Kammerzell

IPC: B29C64/393 ,  B33Y50/02 ,  G06T17/00

Abstract: In an example implementation, a method of compensating for dimensional variation in 3D printing includes receiving a 3D object model that represents a 3D part to be printed. The method also includes receiving a build material type and a position for printing the 3D part within a build volume. The method includes determining from the position, target subvolumes of the build volume into which the 3D part is to be printed, retrieving a dimensional compensation factor associated with each target subvolume, and then applying each dimensional compensation factor to the 3D object model to scale the 3D part according to the position of the 3D part within the build volume.

公开(公告)号：US11110704B2

公开(公告)日：2021-09-07

申请号：US16789890

申请日：2020-02-13

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

Inventor： Guan-Kwee Goh ,  Matthew A Shepherd ,  Mark Mackenzie

IPC: B41J2/14 ,  B41J2/175

Abstract: According to an example, a printing apparatus may include two drop ejecting elements, a fluid circulating element, and a logic device. The logic device may determine whether one or both of a first drop ejecting element and a second drop ejecting element have been fired within a predetermined period of time prior to a current time. In response to the determination, the logic device may selectively transmit an output signal that is to cause the fluid circulating element to be selectively fired, in which the fluid circulating element is positioned to circulate fluid adjacent to both the first drop ejecting element and the second drop ejecting element.

公开(公告)号：US10560584B2

公开(公告)日：2020-02-11

申请号：US15761490

申请日：2015-12-11

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

Inventor： Dawn M Beachnau Hood ,  Matthew A Shepherd ,  Mark H MacKenize ,  Weiyun Sun ,  Milan Justel ,  Robert Yraceburu ,  Steve O Rasmussen

IPC: H04N1/00 ,  G06K15/00 ,  H04N1/23 ,  G06K15/16 ,  B41J2/045 ,  H04N1/17 ,  B33Y50/02 ,  B29C64/112 ,  B29C64/386 ,  B29C64/393 ,  G05B19/4099 ,  B33Y30/00

Abstract: In an example, a print system include a component device that is operation in a number of state, a density engine, and a component engine. An example density engine identifies a plane region of a plane where print fluid is to be printed based on data of a print job and determines a density classifier for the plane based on a location of the plane region on the plane. An example component engine causes an adjustment of a component attribute of the component device based on the density classifier.

公开(公告)号：US20180077315A1

公开(公告)日：2018-03-15

申请号：US15558944

申请日：2015-06-26

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

Inventor： Jay S Gondek ,  Matthew A Shepherd

IPC: H04N1/393 ,  H04N1/409

Abstract: Examples include computing devices, processes, and/or machine-readable storage mediums. Examples analyze a region of pixels for a digital image to determine a set of diagonal direction pixel differences corresponding to a target pixel. Examples analyze the region of pixels to determine diagonal variances corresponding to the target pixel. Examples scale the digital image by processing the target pixel into a set of subpixels based at least in part on the set of diagonal direction pixel differences and the diagonal variances.

公开(公告)号：US11526150B2

公开(公告)日：2022-12-13

申请号：US16076241

申请日：2017-07-28

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

Inventor： Vanessa Verzwyvelt ,  Matthew A Shepherd ,  Morgan T Schramm ,  Andrew E Fitzhugh ,  Lihua Zhao ,  Jacob Tyler Wright ,  Hector Lebron

IPC: G06N5/04 ,  G05B19/4099 ,  B33Y50/00

Abstract: In an example, a method includes receiving object model data describing at least a portion of an object to be generated by additive manufacturing. Object generation instructions for generating the object in its entirety may be derived based on the object model data. Where it is determined that the object model data comprises a data deficiency for deriving the object generation instructions, at least one attribute for the object may be inferred and object generation instructions may be derived based on the object model data and the inferred attribute.

公开(公告)号：US20200233400A1

公开(公告)日：2020-07-23

申请号：US16605230

申请日：2017-10-14

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

Inventor： Jake Wright ,  Matthew A Shepherd

IPC: G05B19/4093 ,  B33Y50/00 ,  B29C64/386

Abstract: In an example implementation, a method of processing a 3D object model includes receiving render data of a 2D slice of a 3D object model and generating distance values indicating how far away voxels in the 2D slice are from a nearest edge of the 3D object model. The method also includes detecting a feature of the 3D object model from the distance values, and generating modified render data to be subsequently used in a 3D printing system to produce the feature in a 3D part.

公开(公告)号：US10596814B2

公开(公告)日：2020-03-24

申请号：US16067309

申请日：2016-04-29

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

Inventor： Guan-Kwee Goh ,  Matthew A Shepherd ,  Mark Mackenzie

IPC: B41J2/14 ,  B41J2/165 ,  B41J2/175

Abstract: According to an example, a printing apparatus may include two drop ejecting elements, a fluid circulating element, and a logic device. The logic device may determine whether one or both of a first drop ejecting element and a second drop ejecting element have been fired within a predetermined period of time prior to a current time. In response to the determination, the logic device may selectively transmit an output signal that is to cause the fluid circulating element to be selectively fired, in which the fluid circulating element is positioned to circulate fluid adjacent to both the first drop ejecting element and the second drop ejecting element.