Patents by Inventor Hsue-Yang Liu
Hsue-Yang Liu 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).
-
Patent number: 11451686Abstract: Color values are measured for a set of color targets printed by a reference printing device on a medium of a reference media type. A different printing device prints a subset of the set of color targets on another medium of this reference media type. The color values of the subset of color targets printed by the different printing device are measured, and the different device calibrated based on the measured color values for both the set that the reference printing device printed and the subset that the different device printed. The different printing device can then also be calibrated for a different media type, based on a transformation of the set of color targets printed by the reference printing device on a medium of the different media type relative to the set of color targets printed by the reference device on the medium of the reference media type.Type: GrantFiled: March 13, 2018Date of Patent: September 20, 2022Assignee: Hewlett-Packard Development Company, L.P.Inventors: Miguel Angel Lopez Alvarez, Hsue-Yang Liu, Jay S Gondek
-
Publication number: 20220143986Abstract: In one example, a printing device can include a print zone that includes a print head and a print media area, wherein the print zone includes a paper to print head spacing (PPS) that corresponds to a distance between the print head and the print media area, and a computing device that includes instructions to determine a first print quality of an image on a print medium utilizing a first PPS value, and alter the first PPS value to a second PPS value based on the first print quality.Type: ApplicationFiled: July 25, 2019Publication date: May 12, 2022Applicant: Hewlett-Packard Development Company, L.P.Inventor: Hsue-Yang LIU
-
Patent number: 11108916Abstract: According to examples, an apparatus may include a processor and a memory on which is stored machine readable instructions that are to cause the processor to determine a size of a chip gap between a first sensor chip and a second sensor chip, access a model that estimates an amount of positional shift of a target centroid, and apply the determined chip gap size and the accessed model on an image captured using the first sensor chip and the second sensor chip to compensate for an estimated positional shift in a centroid of a calibration target in the captured image by causing a location of the calibration target centroid in the captured image to more accurately correspond to an actual location of the calibration target centroid on an object from which the captured image was captured.Type: GrantFiled: July 24, 2017Date of Patent: August 31, 2021Assignee: Hewlett-Packard Development Company, L.P.Inventor: Hsue-Yang Liu
-
Publication number: 20210211547Abstract: According to examples, an apparatus may include a processor and a memory on which is stored machine readable instructions that are to cause the processor to determine a size of a chip gap between a first sensor chip and a second sensor chip, access a model that estimates an amount of positional shift of a target centroid, and apply the determined chip gap size and the accessed model on an image captured using the first sensor chip and the second sensor chip to compensate for an estimated positional shift in a centroid of a calibration target in the captured image by causing a location of the calibration target centroid in the captured image to more accurately correspond to an actual location of the calibration target centroid on an object from which the captured image was captured.Type: ApplicationFiled: July 24, 2017Publication date: July 8, 2021Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventor: Hsue-Yang LIU
-
Publication number: 20200412914Abstract: Color values are measured for a set of color targets printed by a reference printing device on a medium of a reference media type. A different printing device prints a subset of the set of color targets on another medium of this reference media type. The color values of the subset of color targets printed by the different printing device are measured, and the different device calibrated based on the measured color values for both the set that the reference printing device printed and the subset that the different device printed. The different printing device can then also be calibrated for a different media type, based on a transformation of the set of color targets printed by the reference printing device on a medium of the different media type relative to the set of color targets printed by the reference device on the medium of the reference media type.Type: ApplicationFiled: March 13, 2018Publication date: December 31, 2020Inventors: Miguel Angel Lopez Alvarez, Hsue-Yang Liu, Jay S Gondek
-
Patent number: 10377160Abstract: A method including printing a calibration pattern with a wide array printhead having a plurality of printhead dies. The method includes scanning the calibration pattern with a scanbar having a width less than a width of the wide array printhead by indexing the scanbar to a plurality of selected positions across a width of the calibration pattern and providing a scanned calibration image at each selected position, the calibration images together providing a scan of the full width of the calibration pattern, and measuring alignment between successive printhead dies based on the calibration images.Type: GrantFiled: November 19, 2015Date of Patent: August 13, 2019Assignee: Hewlett-Packard Development Company, L.P.Inventors: Hsue-Yang Liu, Matthew A Shepherd
-
Publication number: 20190215407Abstract: Example implementations relate to scan bar calibration. For example, a system for scan bar calibration may include instructions executable by a processing resource to implement a plurality of scanning settings at a scan bar index location of a scanning device. The system may further include instructions to execute a scan bar calibration of a calibration target at the scan bar index location, and generate a scan bar calibration table for the scan bar index location based on the executed scan bar calibration.Type: ApplicationFiled: September 9, 2016Publication date: July 11, 2019Inventors: Hsue-Yang Liu, Milan Crowley Justel, Curtis J Behrend
-
Patent number: 10343433Abstract: A skew sensor calibration unit including a scanner providing a scanned image of a sheet as the sheet is conveyed along a transport path, the scanned image including a leading edge of the sheet and a skew detection pattern printed thereon by a printhead. A calibration module measures a top skew of the sheet based on position signals from a plurality of skew sensors indicating a position of a leading edge of a sheet as the sheet is conveyed along the transport path, measure an image skew of the sheet relative to the printhead based on the scanned image, and generates a calibration factor that when applied to the measured top skew provides a calibrated top skew that matches the image skew.Type: GrantFiled: October 30, 2015Date of Patent: July 9, 2019Assignee: Hewlett-Packard Development Company, L.P.Inventors: Hsue-Yang Liu, Luke P. Sosnowski, Mark H. Mackenzie
-
Patent number: 10086606Abstract: A printer is disclosed. The printer has a print engine that mounts a first printhead and a second printhead adjacent to the first printhead in a staggered line of overlapping printheads. Each printhead has at least one row of nozzles. The blending nozzles in the first printhead overlap with blending nozzles in the second printhead. When printing, the non-overlapping nozzles in the first printhead use a default ink modulation amount and the blending nozzles in both printheads use a scaled ink modulation amount.Type: GrantFiled: April 8, 2014Date of Patent: October 2, 2018Assignee: Hewlett-Packard Development Company, L.P.Inventors: Matthew A Shepherd, Hsue-Yang Liu
-
Publication number: 20180244090Abstract: A method including printing a calibration pattern with a wide array printhead having a plurality of printhead dies. The method includes scanning the calibration pattern with a scanbar having a width less than a width of the wide array printhead by indexing the scanbar to a plurality of selected positions across a width of the calibration pattern and providing a scanned calibration image at each selected position, the calibration images together providing a scan of the full width of the calibration pattern, and measuring alignment between successive printhead dies based on the calibration images.Type: ApplicationFiled: November 19, 2015Publication date: August 30, 2018Inventors: Hsue-Yang Liu, Matthew A Shepherd
-
Publication number: 20180222231Abstract: A skew sensor calibration unit including a scanner providing a scanned image of a sheet as the sheet is conveyed along a transport path, the scanned image including a leading edge of the sheet and a skew detection pattern printed thereon by a printhead. A calibration module measures a top skew of the sheet based on position signals from a plurality of skew sensors indicating a position of a leading edge of a sheet as the sheet is conveyed along the transport path, measure an image skew of the sheet relative to the printhead based on the scanned image, and generates a calibration factor that when applied to the measured top skew provides a calibrated top skew that matches the image skew.Type: ApplicationFiled: October 30, 2015Publication date: August 9, 2018Inventors: Hsue-Yang Liu, Luke P. Sosnowski, Mark H. Mackenzie
-
Patent number: 9782978Abstract: 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.Type: GrantFiled: May 29, 2014Date of Patent: October 10, 2017Assignee: Hewlett-Packard Development Company, L.P.Inventors: Bradley D Chung, Hsue-Yang Liu, Matthew A Shepherd, Mark H MacKenzie, Jason M Quintana
-
Publication number: 20170151808Abstract: Bidirectional error diffusion halftoning of data. Pixels are halftoned in one serpentine direction, and pixels are halftoned in an opposite serpentine direction.Type: ApplicationFiled: May 29, 2014Publication date: June 1, 2017Inventors: Bradley D Chung, Hsue-Yang Liu, Matthew A Shepherd, Mark H Mackenzie, Jason M Quintana
-
Patent number: 9579911Abstract: A sweep speed is determined for sweeping a printer head of a printer across a print medium for printing a swath of an image on the print medium. A distance by which to advance the print medium is at least partially determined in accordance with the determined sweep speed and the print medium is advanced by the determined distance.Type: GrantFiled: October 20, 2015Date of Patent: February 28, 2017Assignee: Hewlett-Packard Development Company, L.P.Inventors: David E. De Bellis, Teresa Gene Trueba Embree, Hsue-Yang Liu, Elizabeth Ezetta
-
Publication number: 20170028717Abstract: A printer is disclosed. The printer has a print engine that mounts a first printhead and a second printhead adjacent to the first printhead in a staggered line of overlapping printheads. Each printhead has at least one row of nozzles. The blending nozzles in the first printhead overlap with blending nozzles in the second printhead. When printing, the non-overlapping nozzles in the first printhead use a default ink modulation amount and the blending nozzles in both printheads use a scaled ink modulation amount.Type: ApplicationFiled: April 8, 2014Publication date: February 2, 2017Inventors: Matthew A SHEPHERD, Hsue-Yang LIU
-
Publication number: 20160039232Abstract: A sweep speed is determined for sweeping a printer head of a printer across a print medium for printing a swath of an image on the print medium. A distance by which to advance the print medium is at least partially determined in accordance with the determined sweep speed and the print medium is advanced by the determined distance.Type: ApplicationFiled: October 20, 2015Publication date: February 11, 2016Applicant: Hewlett-Packard Development Company, L.P.Inventors: David E. DE BELLIS, Teresa Gene TRUEBA EMBREE, Hsue-Yang LIU, Elizabeth EZETTA
-
Patent number: 9193158Abstract: A sweep speed is determined for sweeping a printer head of a printer across a print medium for printing a swath of an image on the print medium. A distance by which to advance the print medium is at least partially determined in accordance with the determined sweep speed and the print medium is advanced by the determined distance.Type: GrantFiled: September 23, 2011Date of Patent: November 24, 2015Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: David E. De Bellis, Teresa Gene Trueba Embree, Hsue-Yang Liu, Elizabeth Ezetta
-
Publication number: 20140204143Abstract: A sweep speed is determined for sweeping a printer head of a printer across a print medium for printing a swath of an image on the print medium. A distance by which to advance the print medium is at least partially determined in accordance with the determined sweep speed and the print medium is advanced by the determined distance.Type: ApplicationFiled: September 23, 2011Publication date: July 24, 2014Inventors: David E. De Bellis, Teresa Gene Trueba Embree, Hsue-Yang Liu, Elizabeth Ezetta
-
Publication number: 20100214338Abstract: A method of compensating for thermally induced misalignments in a printing system includes measuring two or more temperatures of a structure within the printing system, mathematically differencing the two or more temperatures to produce a differenced value, inputting the differenced value into a correlation equation, the correlation equation predicting a misalignment of a target printing system component, and compensating for the predicted misalignment of the target printing system component.Type: ApplicationFiled: February 26, 2009Publication date: August 26, 2010Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Michael Brookmire, Hsue-Yang Liu, Weiyun Sun
-
Patent number: 7708362Abstract: A method for calibrating one or more printheads includes printing a reference image using a first portion of image forming points of a first printhead, printing a diagnostic image using a second portion of image forming points of either the first printhead or a second printhead, detecting an optical density of the combined reference image and the diagnostic image and determining a compensation value based upon the optical density.Type: GrantFiled: April 21, 2004Date of Patent: May 4, 2010Assignee: Hewlett-Packard Development Company, L.P.Inventors: Tod S. Heiles, R. Joseph Megaw, Hsue-Yang Liu