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1. (WO2019005490) A METHOD FOR CONTROLLING A PRINTHEAD IN A DIGITAL PRINTING SYSTEM AND A PRINT ENGINE ADAPTED TO PRINT IMAGE DATA
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Pub. No.:
WO/2019/005490
International Application No.:
PCT/US2018/037435
Publication Date:
03.01.2019
International Filing Date:
14.06.2018
IPC:
G03G 15/043
(2006.01) ,
G03G 15/04
(2006.01)
G
PHYSICS
03
PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G
ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
15
Apparatus for electrographic processes using a charge pattern
04
for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
043
with means for controlling illumination or exposure
G
PHYSICS
03
PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G
ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
15
Apparatus for electrographic processes using a charge pattern
04
for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
Applicants:
EASTMAN KODAK COMPANY
[US/US]; 343 State Street Rochester, NY 14650-2201, US
Inventors:
KUO, Chung-Hui
; US
BRENT, David, R.
; US
Priority Data:
15/635,560
28.06.2017
US
15/635,596
28.06.2017
US
Title
(EN)
A METHOD FOR CONTROLLING A PRINTHEAD IN A DIGITAL PRINTING SYSTEM AND A PRINT ENGINE ADAPTED TO PRINT IMAGE DATA
(FR)
DÉTERMINATION D'UNE FONCTION DE SYNCHRONISATION D'IMPULSION POUR UNE TÊTE D'IMPRESSION LINÉAIRE
Abstract:
(EN)
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.
(FR)
L'invention concerne un procédé de commande d'une tête d'impression comprenant un réseau de sources de lumière. Une fonction d'exposition prévue fournie donne une exposition prévue en fonction d'un nombre entier d'impulsions. Une fonction de synchronisation d'impulsion initiale également fournie définit un temps d'exposition en fonction du nombre d'impulsions. Une fonction de sortie de lumière pour les sources de lumière est déterminée en réponse à la fonction de synchronisation d'impulsions, la fonction de sortie de lumière fournissant une sortie de lumière des sources de lumière en fonction du temps d'exposition. La fonction de synchronisation d'impulsion est mise à jour en réponse à la fonction de sortie de lumière et à la fonction d'exposition prévue. Le processus est répété jusqu'à ce qu'un critère de fin d'itération prédéfini soit satisfait. La fonction de synchronisation d'impulsion déterminée est utilisée pour commander la tête d'impression, chaque source de lumière étant activée pour un comptage d'impulsions correspondant à une valeur de code de pixel d'un pixel d'image associé.
Designated States:
AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language:
English (
EN
)
Filing Language:
English (
EN
)