Patents by Inventor Utpal Kumar Sarkar
Utpal Kumar Sarkar has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9770926Abstract: 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.Type: GrantFiled: May 21, 2014Date of Patent: September 26, 2017Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: M. Isabel Borrell Bayona, Xavier Farina Vargas, Leticia Rubio, Utpal Kumar Sarkar
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Publication number: 20170173984Abstract: 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.Type: ApplicationFiled: May 21, 2014Publication date: June 22, 2017Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: M. Isabel Borrell Bayona, Xavier Farina Vargar, Leticia Rubio, Utpal Kumar Sarkar
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Patent number: 9686444Abstract: The present disclosure relates to a computer implemented method for color separation for a printer, systems, and methods for printing using a printer. In some examples, the method for color separation for a printer comprises forming a color gamut for the printer in the form of a hull in a color space, the hull having vertices corresponding to Neugebauer Primaries, predicting the colorimetry in the color space of at least one Neugebauer Primary lying outside of an ink limit for the printer, determining the Neugebauer Primary area coverages that can produce a desired color in the color space using at least one Neugebauer Primary lying outside of the ink limit.Type: GrantFiled: July 11, 2012Date of Patent: June 20, 2017Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Jan Morovic, Peter Morovic, Juan Manuel Garcia Reyero Viñas, Alejandro Manuel de Peña Hempel, Utpal Kumar Sarkar
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Patent number: 9656466Abstract: In some examples, a printing system includes a printhead comprising a nozzle array including plural columns of nozzles to deliver printing fluid to a print medium, wherein nozzles in a first column of the columns are offset from nozzles in a second column of the columns. A controller is to cause introduction of a grain pattern into an image printed using the printhead onto the print medium by, for each respective pass of a plurality of passes of the printhead over the print medium, controlling an advance of the print medium by an uneven advance step for a print mask pattern that controls firing of the nozzles of the printhead, where the advance of the print medium by the uneven advance step causes an irregular pattern of firing of the nozzles of the printhead in successive passes of the plurality of passes.Type: GrantFiled: July 29, 2016Date of Patent: May 23, 2017Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Andreas Muller, Utpal Kumar Sarkar
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Publication number: 20160325950Abstract: An example media handling system provides a print media (111) along a media path (131) and at least part of the media handling system includes an adhesive material for locating the print media (111) on the at least part of the media path (131).Type: ApplicationFiled: January 31, 2014Publication date: November 10, 2016Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Martin Urrutia Nebreda, Utpal Kumar Sarkar Sarkar
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Publication number: 20150273908Abstract: Print masks for multiple pass print modes are described herein. In at least some examples herein, the print mask includes mask matrices. The mask matrices define a single nozzle actuation pattern. The nozzle actuation pattern is irregular. In at least some examples herein, techniques for printing of an image on a substrate are described. During printing the image on the substrate a print mask is applied such that, for each pass, the inkjet nozzles in the print head are actuated according to the single nozzle actuation pattern.Type: ApplicationFiled: September 6, 2012Publication date: October 1, 2015Inventors: Jamie Fernandez, Ynqvar Rossow, Utpal Kumar Sarkar
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Patent number: 8905521Abstract: 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.Type: GrantFiled: January 30, 2013Date of Patent: December 9, 2014Assignee: Hewlett-Packard Development Company, L.P.Inventors: Andreas Mueller, Jacint Humet Pous, Jaime Fernandez del Rio, Utpal Kumar Sarkar
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Patent number: 8894174Abstract: In one example, a first swath is caused to be printed by a print unit on a media. The media is advanced with respect to the print unit. For a nominal second swath to be printed to beneath and adjacent to the first swath, a plurality of adjustment regions along the width of the nominal second swath are determined in accordance with a profile of non-constant advance errors for the media. An adjusted second swath is formed by, for each of the regions, adjusting the height of the nominal second swath in memory based on the determined amount of advancement error for the region. The print unit is caused to print the adjusted second swath on the media.Type: GrantFiled: February 29, 2012Date of Patent: November 25, 2014Assignee: Hewlett-Packard Development Company, L.P.Inventors: Yngvar Rossow Sethne, Utpal Kumar Sarkar, Marcos Casaldaliga Albisu
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Patent number: 8870320Abstract: 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.Type: GrantFiled: January 29, 2013Date of Patent: October 28, 2014Assignee: Hewlett-Packard Development Company, L.P.Inventors: Andreas Müller, Utpal Kumar Sarkar
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Publication number: 20140210888Abstract: 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.Type: ApplicationFiled: January 29, 2013Publication date: July 31, 2014Applicant: Hewlett-Packard Development Company, L.P.Inventors: Andreas Müller, Utpal Kumar Sarkar
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Publication number: 20140210911Abstract: 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.Type: ApplicationFiled: January 30, 2013Publication date: July 31, 2014Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Andreas Mueller, Jacint Humet Pous, Jaime Fernandez del Rio, Utpal Kumar Sarkar
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Patent number: 8651610Abstract: An image forming system includes a print unit to print a plurality of swaths to form an image on a media, a media transport unit to transport the media to the print unit and an advancement error determination unit to determine an amount of advancement error corresponding to the transportation of the media. The image forming system also includes a swath adjustment module to dynamically adjust a swath size of a respective swath.Type: GrantFiled: February 23, 2011Date of Patent: February 18, 2014Assignee: Hewlett-Packard Development Company, L.P.Inventors: Yngvar Rossow Sethne, Utpal Kumar Sarkar, Marcos Casaldaliga Albisu, Jesús Garcia Maza, Marina Ferran Farrés
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Publication number: 20140016143Abstract: The present disclosure relates to a computer implemented method for color separation for a printer, systems, and methods for printing using a printer. In some examples, the method for color separation for a printer comprises forming a color gamut for the printer in the form of a hull in a color space, the hull having vertices corresponding to Neugebauer Primaries, predicting the colorimetry in the color space of at least one Neugebauer Primary lying outside of an ink limit for the printer, determining the Neugebauer Primary area coverages that can produce a desired color in the color space using at least one Neugebauer Primary lying outside of the ink limit.Type: ApplicationFiled: July 11, 2012Publication date: January 16, 2014Inventors: Jan Morovic, Peter Morovic, Juan Manuel Garcia Reyero Viñas, Alejandro Manuel de Peña Hempel, Utpal Kumar Sarkar
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Publication number: 20120212527Abstract: In one example, a first swath is caused to be printed by a print unit on a media. The media is advanced with respect to the print unit. For a nominal second swath to be printed to beneath and adjacent to the first swath, a plurality of adjustment regions along the width of the nominal second swath are determined in accordance with a profile of non-constant advance errors for the media. An adjusted second swath is formed by, for each of the regions, adjusting the height of the nominal second swath in memory based on the determined amount of advancement error for the region. The print unit is caused to print the adjusted second swath on the media.Type: ApplicationFiled: February 29, 2012Publication date: August 23, 2012Inventors: Yngvar Rossow Sethne, Utpal Kumar Sarkar, Marcos Casaldaliga Albisu
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Publication number: 20120212535Abstract: An image forming system includes a print unit to print a plurality of swaths to form an image on a media, a media transport unit to transport the media to the print unit and an advancement error determination unit to determine an amount of advancement error corresponding to the transportation of the media. The image forming system also includes a swath adjustment module to dynamically adjust a swath size of a respective swath.Type: ApplicationFiled: February 23, 2011Publication date: August 23, 2012Inventors: Yngvar Rossow Sethne, Utpal Kumar Sarkar, Marcos Casaldalíga Albisu, Jesús Garcia Maza, Marina Ferran Farrés