US 12,454,128 B2
Drive controller, head unit, and liquid discharge apparatus
Takashi Kinokuni, Tokyo (JP); and Ryuji Tsukamoto, Kanagawa (JP)
Assigned to RICOH COMPANY, LTD., Tokyo (JP)
Filed by Takashi Kinokuni, Tokyo (JP); and Ryuji Tsukamoto, Kanagawa (JP)
Filed on May 9, 2023, as Appl. No. 18/144,873.
Claims priority of application No. 2022-079612 (JP), filed on May 13, 2022.
Prior Publication US 2023/0364906 A1, Nov. 16, 2023
Int. Cl. B41J 2/045 (2006.01); B05B 1/30 (2006.01)
CPC B41J 2/04588 (2013.01) [B05B 1/3046 (2013.01); B41J 2/04541 (2013.01); B41J 2/04581 (2013.01); B41J 2/04593 (2013.01); B41J 2202/05 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A drive controller comprising:
circuitry configured to:
generate multiple types of drive pulses to be applied to a driver of a liquid discharge head including a valve configured to open and close a discharge port; and
apply the multiple types of drive pulses to the driver to cause the driver to move the valve to open and close the discharge port,
wherein each of the multiple types of drive pulses causes the valve to:
move away from the discharge port at a valve-opening speed to open the discharge port;
keep opening the discharge port for an open time; and
move toward the discharge port at a valve-closing speed to close the discharge port,
wherein the circuitry is further configured to:
generate the multiple types of drive pulses, the open time and the valve-closing speed of which are different;
change the valve-closing speed according to the open time, and
individually control the valve-opening speed and the valve-closing speed according to the open time.