US 12,466,180 B2
Signal generation device, liquid ejection device, and signal generation method capable of suppressing extension of liquid ejection interval
Daichi Kawano, Osaka (JP); Takashi Inoue, Osaka (JP); Keisuke Maeyama, Osaka (JP); Tatsuya Nakagawa, Osaka (JP); Satoshi Morimoto, Osaka (JP); and Minori Yamamoto, Osaka (JP)
Assigned to KYOCERA Document Solutions Inc., Osaka (JP)
Filed by KYOCERA Document Solutions Inc., Osaka (JP)
Filed on Sep. 27, 2023, as Appl. No. 18/475,537.
Claims priority of application No. 2022-156453 (JP), filed on Sep. 29, 2022.
Prior Publication US 2024/0109307 A1, Apr. 4, 2024
Int. Cl. B41J 2/045 (2006.01)
CPC B41J 2/04573 (2013.01) [B41J 2/04581 (2013.01); B41J 2/04588 (2013.01); B41J 2/04591 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A signal generation device, comprising:
a first signal generation portion configured to, based on a reference signal that includes a plurality of rectangular single-wave signals that are output at predetermined specific periods, generate an original common signal in which the rise times of the two or more of the single-wave signals included in the reference signal are extended so that they are different from each other, and the fall timing of one or more of the single-wave signals included in the reference signal is shifted;
an amplifying portion configured to amplify the original common signal; and
a second signal generating portion configured to generate a drive signal to be input to a piezoelectric element that ejects liquid from a nozzle by extracting a rising edge of any one of the single-wave signals, the rise time of which is extended, from the original common signal amplified by the amplifying portion, maintaining a signal level changed by extracting the rising edge of the single-wave signal, and extracting a falling edge of a single-wave signal occurring later than the single-wave signal.