US 12,466,181 B2
Ink jet head
Ryutaro Kusunoki, Mishima Shizuoka (JP); and Noboru Nitta, Tagata Shizuoka (JP)
Assigned to RISO Technologies Corporation, Tokyo (JP)
Filed by RISO Technologies Corporation, Tokyo (JP)
Filed on Jul. 3, 2023, as Appl. No. 18/346,619.
Claims priority of application No. 2022-133445 (JP), filed on Aug. 24, 2022.
Prior Publication US 2024/0066862 A1, Feb. 29, 2024
Int. Cl. B41J 2/045 (2006.01)
CPC B41J 2/04588 (2013.01) [B41J 2/04541 (2013.01); B41J 2/04573 (2013.01); B41J 2/04581 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An ink jet head, comprising:
a piezoelectric member configured to drive a pressure chamber;
an electrode pair configured to apply a voltage to the piezoelectric member;
a common waveform generation circuit configured to generate a common waveform from a first output waveform for ejecting a first volume of liquid and a second output waveform for ejecting a second volume of the liquid that is different from the first volume, the common waveform alternately including an element of the first output waveform and an element of the second output waveform at a predetermined period;
a switch connected between a first electrode of the electrode pair and the common waveform generation circuit; and
a timing controller configured to supply a control signal to turn the switch on and off at the predetermined period.