EP 3238941 B1 20201007 - METHOD FOR DRIVING DROPLET-DISCHARGING HEAD AND DROPLET-DISCHARGING DEVICE
Title (en)
METHOD FOR DRIVING DROPLET-DISCHARGING HEAD AND DROPLET-DISCHARGING DEVICE
Title (de)
VERFAHREN ZUR ANSTEUERUNG EINES TRÖPFCHENAUSSTOSSKOPFES UND TRÖPFCHENAUSSTOSSVORRICHTUNG
Title (fr)
PROCÉDÉ D'EXCITATION D'UNE TÊTE DE DÉGAGEMENT DE GOUTTELETTES ET DISPOSITIF DE DÉGAGEMENT DE GOUTTELETTES
Publication
Application
Priority
- JP 2014266521 A 20141226
- JP 2015086355 W 20151225
Abstract (en)
[origin: EP3238941A1] The present invention addresses the problem of efficiently and stably forming, when continuously discharging droplets from the same nozzle to coalesce the droplets and form large droplets, large droplets of increased liquid volume with a short drive cycle. When applying a drive signal to a pressure-generating means for expanding or contacting the volume of a pressure chamber, applying pressure on a liquid in the pressure chamber by driving said pressure-generating means, and discharging droplets from a nozzle, the above problem is solved by: a first drive signal PA1 comprising a first expanding pulse Pa1 for expanding the volume of the pressure chamber and contracting same after a specified period, a first contracting pulse Pa2 for contracting the volume of the pressure chamber and expanding same after a specified period, a second expanding pulse Pa3 for expanding the volume of the pressure chamber and contracting same after a specified period, and a second contracting pulse Pa4 for contracting the volume of the pressure chamber and expanding same after a specified period, in said order; and the pulse width PAW1 of the first expanding pulse Pa1 being greater than 2AL and less than 4 AL (AL being ½ of the acoustic resonance period of the pressure wave in the pressure chamber).
IPC 8 full level
B41J 2/01 (2006.01); B41J 2/015 (2006.01); B41J 2/045 (2006.01)
CPC (source: EP)
B41J 2/04581 (2013.01); B41J 2/04588 (2013.01); B41J 2/04593 (2013.01); B41J 2/04596 (2013.01); B41J 2202/06 (2013.01); B41J 2202/10 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3238941 A1 20171101; EP 3238941 A4 20180815; EP 3238941 B1 20201007; CN 107107614 A 20170829; CN 107107614 B 20200121; JP 6575534 B2 20190918; JP WO2016104756 A1 20171005; WO 2016104756 A1 20160630
DOCDB simple family (application)
EP 15873324 A 20151225; CN 201580070612 A 20151225; JP 2015086355 W 20151225; JP 2016566549 A 20151225