公开(公告)号：US11964472B2

公开(公告)日：2024-04-23

申请号：US17261048

申请日：2018-11-28

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

Inventor： Li Qian ,  Diego Lopez Ubieto ,  Francisco Guerrero Carvajal

IPC: B41J11/46 ,  B41J11/42 ,  B41J11/44 ,  G01P3/38 ,  G06V10/22

CPC classification number: B41J11/46 ,  B41J11/42 ,  B41J11/44 ,  G01P3/38 ,  G06V10/225

Abstract: An optical sensor device (10) includes an application module (12) for applying an irregular pattern of marks to a surface of a medium and an optical detector module (14). The optical detector module (14) acquires images of the applied marks and may determine an advancement speed of the medium based on the acquired images.

公开(公告)号：US11379163B2

公开(公告)日：2022-07-05

申请号：US16603560

申请日：2018-06-15

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

Inventor： Li Qian ,  Francisco Guerrero Carvajal ,  Secundino Vicente Vicente

IPC: G06F3/12 ,  B41J2/21 ,  G06K15/02

Abstract: In an example, there is provided a method and apparatus for generating a print output file, the method comprising receiving at least one image to be printed, determining a printing area corresponding to a region containing the at least one image to be printed and a non-printing area corresponding to a remaining region, providing a spit-on-page dot pattern limited to the non-printing area, and generating the print output file comprising the dot pattern and the at least one image.

公开(公告)号：US20220078310A1

公开(公告)日：2022-03-10

申请号：US17419085

申请日：2019-02-21

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

Inventor： Maxime Rosello ,  Li Qian ,  Jaime Juan Munoz

IPC: H04N1/60 ,  H04N1/00 ,  B41J2/045

Abstract: A method is described in which image data of an image to be printed is obtained wherein the image data includes data of each colorant to be printed. The image data of each colorant to be printed is analysed to detect areas of the image in which dye-enriched colorant will occur during printing. The image data is modified to compensate for over-saturation due to the dye-enriched colorant in the detected areas and the image is printed based on the modified image data.

公开(公告)号：US20210339533A1

公开(公告)日：2021-11-04

申请号：US17271781

申请日：2018-11-20

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

Inventor： Li Qian

IPC: B41J2/165 ,  B41J2/17

Abstract: An example of a printing apparatus is disclosed. The printing apparatus comprises a carriage comprising a printhead to spit a printing fluid, the carriage to move over a service zone and a print zone. The printing apparatus also comprises a controller to determine a spit location within the service zone associate with the printing fluid; and spit, during the service operation, an amount of the printing fluid at the spit location of the service zone associated to the printing fluid.

公开(公告)号：US10382652B2

公开(公告)日：2019-08-13

申请号：US15540908

申请日：2015-01-29

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

Inventor： Li Qian ,  Xavier Domingo Reguant ,  Secundino Vicente Vicente

IPC: H04N1/58 ,  B41J3/60 ,  G06T7/194

Abstract: According to one example, there is provided a method of generating a day/night image on a media. The method comprises obtaining an image to be printed as a front-to-back image, printing the obtained image on a first side of the media, processing the obtained image by flipping the image, applying a degree of edge removal, and applying a degree blur. The method further comprises printing the processed image on a reverse side of the media, such that the first printed image and printed modified image are substantially aligned with one another.

公开(公告)号：US11413895B2

公开(公告)日：2022-08-16

申请号：US17049749

申请日：2018-06-15

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

Inventor： Li Qian

IPC: B41M3/00 ,  B41J29/393 ,  B41J2/21 ,  G01J3/50 ,  H04N1/60

Abstract: In an example there is provided a printing method comprising receiving first and second image data for first and second images to be printed on a substrate, determining first print data for the first image on the basis of the first image data and a white layer to be printed between the first image and second image, to achieve a nominal color profile for the first image; determining second print data for the second image on the basis of the first image data, second image data, the white layer and one or more properties of the substrate to achieve a nominal color profile for the second image; communicating the print data for the first and second images to a printing device to print the first and second images and white layer on the substrate.

公开(公告)号：US20210368071A1

公开(公告)日：2021-11-25

申请号：US17049749

申请日：2018-06-15

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

Inventor： Li Qian

IPC: H04N1/60 ,  B41M3/00 ,  G01J3/50

Abstract: In an example there is provided a printing method comprising receiving first and second image data for first and second images to be printed on a substrate, determining first print data for the first image on the basis of the first image data and a white layer to be printed between the first image and second image, to achieve a nominal color profile for the first image; determining second print data for the second image on the basis of the first image data, second image data, the white layer and one or more properties of the substrate to achieve a nominal color profile for the second image; communicating the print data for the first and second images to a printing device to print the first and second images and white layer on the substrate.

公开(公告)号：US20210331480A1

公开(公告)日：2021-10-28

申请号：US16498641

申请日：2018-05-15

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

Inventor： Li Qian ,  Francisco Guerrero Carvajal

IPC: B41J2/165

Abstract: A method comprising: soaking a portion of a web in a printing device with printing liquid from a first print head (110) of the printing device; and wiping at least one nozzle of a second print head (120) in the printing device with the soaked portion of the web. The method provides a servicing method for print heads in the printing device.

公开(公告)号：US20210039408A1

公开(公告)日：2021-02-11

申请号：US16963931

申请日：2018-02-26

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

Inventor： Antonio Gracia Verdugo ,  Andrei Alexandru Dafinoiu ,  Li Qian

IPC: B41J19/14 ,  B41J2/21 ,  B29C64/223 ,  B29C64/386 ,  B29C64/147

Abstract: In an example a system includes a carriage with a print head receiving station, a color variation engine, and a delay engine. The color variation engine identifies a potential color variation condition corresponding to an area fill region. The delay engine applies a carriage delay strategy according to the identified potential color variation condition and the size of the area fill region.

公开(公告)号：US20190049305A1

公开(公告)日：2019-02-14

申请号：US16073376

申请日：2016-05-10

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

Inventor： Li Qian ,  Xavier Domingo ,  Alfonso Sanchez ,  Secundino Vicente Vicente

IPC: G01J3/52 ,  B41M3/00 ,  G01J3/46 ,  H04N1/60

CPC classification number: G01J3/52 ,  B41M3/00 ,  B41M3/008 ,  B41M5/0047 ,  B41M5/0064 ,  G01J3/462 ,  G01J3/463 ,  H04N1/60 ,  H04N1/6005 ,  H04N1/6038

Abstract: Examples herein provide a method. The method includes printing first color patches at a first location on a first side of a print medium. The method includes generating an international color consortium (“ICC”) profile of the first side by characterizing the first color patches using a spectrophotometer. The method includes printing, using the ICC profile of the first side, second color patches at a second location on the first side of the print medium. The method includes printing third color patches on a second side of the print medium, the third patches being a registered mirrored copy of the second patches. The method includes generating an ICC profile of the second side by characterizing the registered second and third patches using the spectrophotometer.