Liquid discharge head and printer
In accordance with an embodiment, a liquid discharge head comprises an actuator and a controller. The actuator drives a pressure chamber, which is filled with liquid and communicates with a nozzle in which a meniscus of the liquid is formed. The controller applies an acceleration pulse for accelerating vibration of the meniscus to the actuator after applying a discharge pulse for discharging the liquid in the pressure chamber from the nozzle.
1. A liquid discharge head, comprising:
an actuator configured to drive a pressure chamber comprising liquid and communicating with a nozzle in which a meniscus of the liquid is formed; and
a controller configured to apply an acceleration pulse for accelerating vibration of the meniscus to the actuator after applying a discharge pulse for discharging the liquid in the pressure chamber from the nozzle;
wherein the controller applies the acceleration pulse to the actuator after applying a cancellation pulse for suppressing vibration of the meniscus.
2. The liquid discharge head according to claim 1 , wherein
the pressure chamber contracts in response to the acceleration pulse.
3. The liquid discharge head according to claim 1 , wherein
the controller applies the acceleration pulse to the actuator after applying a plurality of discharge pulses.
4. The liquid discharge head according to claim 1 , wherein
the liquid discharge head is an inkjet head.
5. The liquid discharge head according to claim 1 , wherein
the actuator comprises a piezoelectric member.
6. The liquid discharge head according to claim 1 , wherein
the actuator comprises two piezoelectric members.
7. The liquid discharge head according to claim 1 , wherein
the liquid is ink.
8. The liquid discharge head according claim 1 , wherein
the acceleration pulse increases flow velocity of the meniscus to a predetermined velocity without discharging the liquid.
9. The liquid discharge head according to claim 8 , wherein
the acceleration pulse increases the flow velocity of the meniscus from 30% to 65% of a peak of a velocity generated according to the discharge pulse.
10. The liquid discharge head according to claim 8 , wherein
the acceleration pulse increases the flow velocity of the meniscus from 30% to 65% of a discharge threshold value.
11. A printer, comprising:
a conveyance section configured to convey a medium; and
a liquid discharge head, wherein
the liquid discharge head comprises:
an actuator configured to drive a pressure chamber comprising a liquid and communicating with a nozzle in which a meniscus of the liquid is formed; and
a controller configured to apply an acceleration pulse for accelerating vibration of the meniscus to the actuator after applying a discharge pulse for discharging the liquid in the pressure chamber from the nozzle;
wherein the controller applies the acceleration pulse to the actuator after applying a cancellation pulse for suppressing vibration of the meniscus.
12. The printer according to claim 11 , wherein
the pressure chamber contracts in response to the acceleration pulse.
13. The printer according to claim 11 , wherein
the controller applies the acceleration pulse to the actuator after applying a plurality of discharge pulses.
14. The printer according to claim 11 , wherein
the liquid discharge head is an inkjet head.
15. The printer according to claim 11 , wherein
the actuator comprises a piezoelectric member.
16. The printer according to claim 11 , wherein
the actuator comprises two piezoelectric members.
17. The printer according to claim 11 , wherein
the liquid is ink.
18. A liquid discharge method, comprising:
driving a pressure chamber comprising liquid with an actuator, the actuator communicating with a nozzle in which a meniscus of the liquid is formed;
applying an acceleration pulse for accelerating vibration of the meniscus to the actuator after applying a discharge pulse for discharging the liquid in the pressure chamber from the nozzle; and
applying the acceleration pulse to the actuator after applying a cancellation pulse for suppressing vibration of the meniscus.