US 12,070,940 B2
Printhead control circuit and liquid ejecting apparatus
Shuichi Nakano, Shiojiri (JP); Motonori Chikamoto, Shiojiri (JP); Jun Sato, Shiojiri (JP); and Toshihito Takagi, Chino (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Jul. 7, 2022, as Appl. No. 17/859,035.
Claims priority of application No. 2021-113637 (JP), filed on Jul. 8, 2021; and application No. 2021-215408 (JP), filed on Dec. 29, 2021.
Prior Publication US 2023/0010396 A1, Jan. 12, 2023
Int. Cl. B41J 2/045 (2006.01); B41J 2/14 (2006.01)
CPC B41J 2/04541 (2013.01) [B41J 2/04581 (2013.01); B41J 2/14201 (2013.01); B41J 2002/14491 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A printhead control circuit causing a printhead to execute printing, the printhead performing abnormality detection in response to a first signal inputted to a second terminal in a state in which a potential of a first terminal is a first potential and a second signal inputted to the second terminal in a state in which the potential of the first terminal is a second potential, the printhead control circuit comprising:
a signal circuit configured to output the first and second signals;
a first wire electrically coupled to the first terminal; and
a second wire electrically coupled to the second terminal, wherein
at least one of the first and second potentials is higher than potentials of the first and second signals, and
the signal circuit outputs the first signal to the second wire in a state in which the first wire is being supplied with a first voltage signal at the first potential and outputs the second signal to the second wire after outputting the first signal in a state in which the first wire is being supplied with a second voltage signal at the second potential, which is different from the first potential, to cause the printhead to execute the abnormality detection in response to the first signal, the second signal, the first voltage signal, and the second voltage signal.