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1. WO1996038812 - SERVO AND ADAPTIVE CORRECTOR OF PRINT SPEED IN A PRINTER

Publication Number WO/1996/038812
Publication Date 05.12.1996
International Application No. PCT/US1996/007592
International Filing Date 24.05.1996
Chapter 2 Demand Filed 20.12.1996
IPC
G06K 15/12 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
15Arrangements for producing a permanent visual presentation of the output data
02using printers
12by photographic printing
H04N 1/17 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
1Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
04Scanning arrangements
17the scanning speed being dependent on content of picture
CPC
G06K 15/12
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
15Arrangements for producing a permanent visual presentation of the output data ; , e.g. computer output printers
02using printers
12by photographic printing ; , e.g. by laser printers
G06K 15/1233
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
15Arrangements for producing a permanent visual presentation of the output data ; , e.g. computer output printers
02using printers
12by photographic printing ; , e.g. by laser printers
1233using a cathode-ray tube or an optical-fibre tube
G06K 2215/0005
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
2215Arrangements for producing a permanent visual presentation of the output data
0002Handling the output data
0005Accepting output data; Preparing data for the controlling system
H04N 1/17
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
1Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
04Scanning arrangements ; , i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
17the scanning speed being dependent on content of picture
Applicants
  • POLAROID CORPORATION [US]/[US]
Inventors
  • CRAWFORD, Timothy, R.
  • CAMPBELL, Thomas, K.
  • GRABEL, Vernon, C.
Agents
  • STECEWYCZ, Joseph
Priority Data
08/456,23031.05.1995US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SERVO AND ADAPTIVE CORRECTOR OF PRINT SPEED IN A PRINTER
(FR) SYSTEME DE REGLAGE ASSERVI ET ADAPTATIF DE LA VITESSE D'IMPRESSION DANS UNE IMPRIMANTE
Abstract
(EN)
A servo and adaptive corrector of print speed for an electronic printer is disclosed which uses adaptively adjust print speed to avoid running out of image data during printing. The print speed is adjusted by first monitoring how fast data is transferred from a computer to the printer and changing an exposure table therefor. Then, once the printing has begun, by monitoring the print speed and adjusting servo speed based on any changes in print requirements due to a compression ratio of the image data that has been transferred from the computer.
(FR)
L'invention se rapporte à un système de réglage asservi et adaptatif de la vitesse d'impression dans une imprimante électronique. Selon l'invention, un réglage adaptatif de la vitesse d'impression permet d'éviter que l'imprimante se trouve à cours de données d'image pendant l'impression. Le réglage de la vitesse se fait d'abord par contrôle de la rapidité de transfert des données entre un ordinateur et l'imprimante et par modification de la table d'exposition par rapport à cette rapidité, puis, une fois l'impression commencée, par contrôle de la vitesse d'impression et adaptation de cette vitesse en mode asservi selon les modifications des conditions d'impression requises imputables à un rapport de compression des données d'image transférées depuis l'ordinateur.
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