WO2019005490A3 - A method for controlling a printhead in a digital printing system and a print engine adapted to print image data - Google Patents

A method for controlling a printhead in a digital printing system and a print engine adapted to print image data Download PDF

Info

Publication number
WO2019005490A3
WO2019005490A3 PCT/US2018/037435 US2018037435W WO2019005490A3 WO 2019005490 A3 WO2019005490 A3 WO 2019005490A3 US 2018037435 W US2018037435 W US 2018037435W WO 2019005490 A3 WO2019005490 A3 WO 2019005490A3
Authority
WO
WIPO (PCT)
Prior art keywords
function
printhead
controlling
light output
exposure
Prior art date
Application number
PCT/US2018/037435
Other languages
French (fr)
Other versions
WO2019005490A2 (en
Inventor
Chung-Hui Kuo
David R. BRENT
Original Assignee
Eastman Kodak Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US15/635,560 external-priority patent/US10036975B1/en
Priority claimed from US15/635,596 external-priority patent/US10192150B2/en
Application filed by Eastman Kodak Company filed Critical Eastman Kodak Company
Priority to EP18737476.4A priority Critical patent/EP3646119B1/en
Priority to EP22157341.3A priority patent/EP4020088A1/en
Priority to CN201880043701.XA priority patent/CN111164518B/en
Publication of WO2019005490A2 publication Critical patent/WO2019005490A2/en
Publication of WO2019005490A3 publication Critical patent/WO2019005490A3/en

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/043—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for controlling illumination or exposure
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/04036—Details of illuminating systems, e.g. lamps, reflectors
    • G03G15/04045—Details of illuminating systems, e.g. lamps, reflectors for exposing image information provided otherwise than by directly projecting the original image onto the photoconductive recording material, e.g. digital copiers
    • G03G15/04054—Details of illuminating systems, e.g. lamps, reflectors for exposing image information provided otherwise than by directly projecting the original image onto the photoconductive recording material, e.g. digital copiers by LED arrays

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)

Abstract

A method is described for controlling a printhead including an array of light sources. An aim exposure function is provided which gives an aim exposure as a function of an integer pulse count. An initial pulse timing function is also provided which defines an exposure time as a function of pulse count. A light output function for the light sources is determined responsive to the pulse timing function, wherein the light output function gives a light output of the light sources as a function of exposure time. The pulse timing function is updated responsive to the light output function and the aim exposure function. The process is repeated until a predefined iteration termination criterion is satisfied. The determined pulse timing function is used to control the printhead, wherein each light source is activated for a pulse count corresponding to a pixel code value of an associated image pixel.
PCT/US2018/037435 2017-06-28 2018-06-14 Determining a pulse timing function for a linear printhead WO2019005490A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP18737476.4A EP3646119B1 (en) 2017-06-28 2018-06-14 A method for controlling a printhead in a digital printing system and a print engine adapted to print image data
EP22157341.3A EP4020088A1 (en) 2017-06-28 2018-06-14 Determining a pulse timing function for a linear printhead
CN201880043701.XA CN111164518B (en) 2017-06-28 2018-06-14 Determining pulse timing function for linear print head

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US15/635,560 US10036975B1 (en) 2017-06-28 2017-06-28 Determining a pulse timing function for a linear printhead
US15/635,596 2017-06-28
US15/635,560 2017-06-28
US15/635,596 US10192150B2 (en) 2017-06-28 2017-06-28 Print engine with print-mode-dependent pulse timing functions

Publications (2)

Publication Number Publication Date
WO2019005490A2 WO2019005490A2 (en) 2019-01-03
WO2019005490A3 true WO2019005490A3 (en) 2019-02-07

Family

ID=62817092

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2018/037435 WO2019005490A2 (en) 2017-06-28 2018-06-14 Determining a pulse timing function for a linear printhead

Country Status (3)

Country Link
EP (2) EP3646119B1 (en)
CN (1) CN111164518B (en)
WO (1) WO2019005490A2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003182143A (en) * 2001-12-14 2003-07-03 Fuji Xerox Co Ltd Imaging apparatus
US20050062831A1 (en) * 2003-09-24 2005-03-24 Fuji Photo Film Co., Ltd. Image forming apparatus and image forming method
US20080042045A1 (en) * 2006-06-26 2008-02-21 Seiko Epson Corporation Electro optical device, correction value determining method, and electronic apparatus

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7079287B1 (en) 2000-08-01 2006-07-18 Eastman Kodak Company Edge enhancement of gray level images
US7079281B1 (en) 2000-08-01 2006-07-18 Eastman Kodak Company Edge enhancement processor and method with adjustable threshold setting
US7286259B2 (en) * 2000-09-05 2007-10-23 Fuji Xerox Co., Ltd. Self-scanned light-emitting device array, its driving method, and driving circuit
JP3782689B2 (en) * 2001-08-09 2006-06-07 シャープ株式会社 Image forming apparatus and image forming method
US7830569B2 (en) 2006-03-31 2010-11-09 Eastman Kodak Company Multilevel halftone screen and sets thereof
US9030516B2 (en) 2009-10-12 2015-05-12 Eastman Kodak Company Printer nonuniformity compensation for halftone screens
US9147232B1 (en) 2014-03-26 2015-09-29 Eastman Kodak Company Reducing halo artifacts in electrophotographic printing systems
JP6436007B2 (en) * 2015-07-06 2018-12-12 株式会社リコー Light source drive control device, image forming apparatus, and light source drive method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003182143A (en) * 2001-12-14 2003-07-03 Fuji Xerox Co Ltd Imaging apparatus
US20050062831A1 (en) * 2003-09-24 2005-03-24 Fuji Photo Film Co., Ltd. Image forming apparatus and image forming method
US20080042045A1 (en) * 2006-06-26 2008-02-21 Seiko Epson Corporation Electro optical device, correction value determining method, and electronic apparatus

Also Published As

Publication number Publication date
EP4020088A1 (en) 2022-06-29
EP3646119A2 (en) 2020-05-06
WO2019005490A2 (en) 2019-01-03
EP3646119B1 (en) 2022-02-23
CN111164518A (en) 2020-05-15
CN111164518B (en) 2022-10-11

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