US 12,459,250 B2
Liquid ejection apparatus and head unit
Makoto Miyazawa, Nagano (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Feb. 17, 2023, as Appl. No. 18/170,609.
Claims priority of application No. 2022-024406 (JP), filed on Feb. 21, 2022.
Prior Publication US 2023/0264471 A1, Aug. 24, 2023
Int. Cl. B41J 2/045 (2006.01)
CPC B41J 2/04541 (2013.01) [B41J 2/04581 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A liquid ejection apparatus comprising:
an ejection head including a drive element driven by a drive signal and ejecting a liquid by driving the drive element;
an ejection control circuit including a drive circuit that outputs the drive signal based on a base drive signal including a plurality of pieces of drive data;
a main control circuit that outputs, to the ejection control circuit, an ejection control signal including the base drive signal and a determination signal corresponding to the base drive signal; and
a cable that communicably couples the ejection control circuit and the main control circuit and through which the ejection control signal propagates,
the ejection control circuit further including a determination circuit that determines, using the determination signal that the main control circuit has output through the cable, whether the plurality of pieces of drive data are normal.