公开(公告)号：US11059220B2

公开(公告)日：2021-07-13

申请号：US15745939

申请日：2015-10-19

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. ,  Leticia Rubio ,  Utpal Kumar Sarkar ,  Salvador Sanchez Ribes

Inventor： Leticia Rubio ,  Utpal Kumar Sarkar ,  Salvador Sanchez Ribes

IPC: B29C64/393 ,  B29C64/209 ,  B29C64/35 ,  B29C64/165 ,  B29C64/295 ,  B33Y40/00 ,  B33Y50/02 ,  B33Y10/00 ,  B33Y30/00 ,  B29K105/00

Abstract: In an example, a processor comprises an ancillary print agent distribution module to determine instructions for a print control module. The print control module may be to control the distribution of print agent onto a first region of a layer of build material in an object fabrication chamber in an additive manufacturing process in which at least one object is generated by selective solidification of each of a plurality of layers of build material and the selective solidification of build material is determined by the distribution of at least one print agent. The instructions determined by the ancillary print agent distribution module may be to cause the print control module to control the distribution of print agent in a second region of a layer of build material in an object fabrication chamber as part of a process which is ancillary to object generation. The first and second regions may be spatially distinct.

公开(公告)号：US10592790B1

公开(公告)日：2020-03-17

申请号：US16183904

申请日：2018-11-08

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

Inventor： Yafei Mao ,  Jan Allebach ,  Lluis Abello Rosello ,  Joan Vidal Fortia ,  Robert Ulichney ,  Utpal Kumar Sarkar

IPC: G06K15/02 ,  H04N1/405

Abstract: In some examples, an imaging device may include a controller including processing circuitry to detect, a first quantity of rows of pixels to be included as a first band of a contone image, process the pixels of each row of the first band in parallel raster order, detect a second quantity of rows of pixels to be included as a second band of the contone image; and process the pixels of each row of the second band in response to the completion of the pixels of the first band, where the rows of the second band are processed in parallel in serpentine order with respect to the first band.

公开(公告)号：US10587774B2

公开(公告)日：2020-03-10

申请号：US16342503

申请日：2017-01-27

Applicant: Hewlett-Packard Development Company, L.P. ,  Purdue Research Foundation

Inventor： Ruiyi Mao ,  Jan Allebach ,  Wanling Jiang ,  Lluis Abello Rosello ,  Robert Ulichney ,  Utpal Kumar Sarkar

IPC: H04N1/405 ,  B29C64/386 ,  G06K15/02 ,  B33Y50/00 ,  B29C64/112 ,  H04N1/52

Abstract: According to an example, an apparatus may include a processor and a memory. The memory may have stored thereon machine readable instructions that may cause the processor to access an initial halftone image of a three-dimensional (3D) object, the initial halftone image being generated from a continuous tone image of the 3D object. The instructions may also cause the processor to iteratively modify voxel data for the initial halftone image to identify updated voxel data that more accurately corresponds to the continuous tone image than the initial halftone image and to generate halftone image printing data for the 3D object containing the updated voxel data.

公开(公告)号：US09770926B2

公开(公告)日：2017-09-26

申请号：US15310171

申请日：2014-05-21

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

Inventor： M. Isabel Borrell Bayona ,  Xavier Farina Vargas ,  Leticia Rubio ,  Utpal Kumar Sarkar

IPC: B41J2/21 ,  B41J2/155 ,  G06K15/10 ,  B41J25/308 ,  B41J2/045 ,  B41J29/393

CPC classification number: B41J25/308 ,  B41J2/04505 ,  B41J2/04508 ,  B41J2/155 ,  B41J2/2132 ,  B41J2/2139 ,  B41J2/2146 ,  B41J29/393 ,  B41J2202/21 ,  G06K15/102 ,  G06K15/105 ,  G06K15/107

Abstract: Example implementations relate to swath height error compensation. Some examples may determine a density of an image to be printed in an overlap area of a printing material. The overlap area may include target pixels capable of being printed by a first set of drop ejection elements and a second set of drop ejection elements that are redundant to the first set of drop ejection elements. Some implementations may also determine a mask to apply to the first and second set of drop ejection elements based on the determined density, and the mask may designate at least one additional drop to apply to at least one target pixel in the overlap area by at least one of the first and second set of drop ejection elements. Some implementations may also apply the mask to the first set of drop ejection elements and the second set of drop ejection elements.

公开(公告)号：US08905521B2

公开(公告)日：2014-12-09

申请号：US13754198

申请日：2013-01-30

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

Inventor： Andreas Mueller ,  Jacint Humet Pous ,  Jaime Fernandez del Rio ,  Utpal Kumar Sarkar

IPC: B41J2/04

CPC classification number: B41J2/04 ,  G06K15/107 ,  H04N1/52 ,  H04N1/605

Abstract: An apparatus and method for use in printing a swath in a multipass printing device are disclosed. The method comprises selectively depositing a drop of ink associated with a pixel to be printed on a print media based on a substantially uniform print mask function during a first pass of a print head, and selectively depositing a further drop of ink associated with the pixel on the print media based on a ramp print mask function during a further pass of the print head.

Abstract translation: 公开了一种用于在多重打印装置中打印条带的装置和方法。 该方法包括在打印头的第一次通过期间基于基本上均匀的打印掩模功能选择性地沉积与要打印的像素相关联的墨滴，以及选择性地将与像素相关联的另一墨水滴放置在 所述打印介质基于所述打印头的进一步通过期间的斜坡打印掩模功能。

公开(公告)号：US20140210888A1

公开(公告)日：2014-07-31

申请号：US13752527

申请日：2013-01-29

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

Inventor： Andreas Müller ,  Utpal Kumar Sarkar

IPC: B41J2/13

CPC classification number: B41J2/13 ,  B41J2/2132 ,  G06K15/107

Abstract: A method and apparatus for processing image data is described. An example of a method involves applying a first mask to image data corresponding to an overlap zone of a first print region, the first mask representing a first mask pattern and applying a second mask to image data corresponding to the overlap zone of a second print region, the second mask representing a second mask pattern. Each of the first and second mask patterns define a periodic variation in a dimension corresponding to the first direction. First and second mask patterns for at least a second image plane are spatially separated in the dimension corresponding to the first direction in relation to first and second patterns of a first image plane.

Abstract translation: 描述用于处理图像数据的方法和装置。 一种方法的示例涉及将第一掩模应用于对应于第一印刷区域的重叠区域的图像数据，第一掩模表示第一掩模图案，并且将对应于第二印刷区域的重叠区域的图像数据应用第二掩模 ，所述第二掩模表示第二掩模图案。 第一和第二掩模图案中的每一个限定对应于第一方向的尺寸的周期性变化。 用于至少第二图像平面的第一和第二掩模图案相对于第一图像平面的第一和第二图案在与第一方向对应的尺寸中空间上分离。