EP 0649746 A1 19950426 - Variable halftone operation inkjet printheads.
Title (en)
Variable halftone operation inkjet printheads.
Title (de)
Tintenstrahldruckköpfe mit variablem Halbton-Betrieb.
Title (fr)
Têtes d'impression à jet d'encre pour l'opération à demi-teinte variable.
Publication
Application
Priority
US 14394593 A 19931026
Abstract (en)
A method of halftone printing with a thermal inkjet printer having a thermal inkjet printhead (19). The method includes the steps of determining a first pulse width and voltage that will cause the thermal inkjet printhead to deposit an ink drop having a first selected drop volume, operating the thermal inkjet printhead with said first pulse width and voltage to deposit an ink drop having the first selected drop volume, determining a second pulse width and voltage to produce a second selected drop volume that is different from said first selected drop volume, and operating the thermal inkjet printhead with said second pulse width and voltage to deposit an ink drop having the second selected drop volume. <IMAGE>
IPC 1-7
IPC 8 full level
B41J 2/05 (2006.01); B41J 2/01 (2006.01); B41J 2/205 (2006.01); B41J 2/21 (2006.01)
CPC (source: EP)
B41J 2/2128 (2013.01)
Citation (search report)
- [Y] US 4746935 A 19880524 - ALLEN ROSS R [US]
- [Y] US 5198833 A 19930330 - KUBOTA HIROSHI [JP]
- [A] EP 0373894 A2 19900620 - HEWLETT PACKARD CO [US]
- [A] EP 0517521 A2 19921209 - CANON KK [JP]
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 0649746 A1 19950426; JP 3471096 B2 20031125; JP H07178930 A 19950718
DOCDB simple family (application)
EP 94114840 A 19940921; JP 25656294 A 19941021