US 12,377,650 B2
Liquid ejecting apparatus
Yu Shiozawa, Shiojiri (JP); Masaki Mori, Shiojiri (JP); Motoki Takabe, Shiojiri (JP); Hitoshi Takaai, Azumino (JP); and Eiju Hirai, Azumino (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Dec. 8, 2022, as Appl. No. 18/063,275.
Claims priority of application No. 2021-199904 (JP), filed on Dec. 9, 2021.
Prior Publication US 2023/0182465 A1, Jun. 15, 2023
Int. Cl. B41J 2/45 (2006.01); B41J 2/045 (2006.01); B41J 2/14 (2006.01)
CPC B41J 2/04536 (2013.01) [B41J 2/04513 (2013.01); B41J 2/04541 (2013.01); B41J 2/04563 (2013.01); B41J 2/04581 (2013.01); B41J 2/04588 (2013.01); B41J 2/14233 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A liquid ejecting apparatus comprising:
a liquid ejecting head including a pressure chamber substrate having a plurality of pressure chambers, individual electrodes individually provided for the plurality of pressure chambers, a common electrode provided in common for the plurality of pressure chambers, a piezoelectric body disposed between the individual electrodes and the common electrode and configured to apply pressure to liquid within the pressure chambers, and a drive wiring electrically coupled to the individual electrodes and the common electrode;
a controller that controls an ejection operation of the liquid ejecting head by applying a drive voltage to the individual electrodes and applying a reference voltage to the common electrode to drive the piezoelectric body; and
an acquirer that acquires information related to a cumulative number of times of the driving of the piezoelectric body, wherein
the controller drives the piezoelectric body such that, when the cumulative number of times of the driving is a first number of times, a voltage difference between the drive voltage and the reference voltage is a first value,
the controller drives the piezoelectric body such that, when the cumulative number of times of the driving is a second number of times greater than the first number of times, the voltage difference is a second value smaller than the first value,
the controller drives the piezoelectric body such that, when the cumulative number of times of the driving is the first number of times, the drive voltage is a first drive voltage value,
the controller drives the piezoelectric body such that, when the cumulative number of times of the driving is the second number of times, the drive voltage is a second drive voltage value smaller than the first drive voltage value, and
the controller drives the piezoelectric body such that a difference between a maximum value of the drive voltage and a minimum value of the drive voltage when the cumulative number of times of the driving is the first number of times is equal to a difference between a maximum value of the drive voltage and a minimum value of the drive voltage when the cumulative number of times of the driving is the second number of times.