Driving method for ink jet recording head and ink jet recording

Details Driving method for ink jet recording head and ink jet recording Driving method for ink jet recording head and ink jet recording

1991-01-09

1993-06-22

Hartary, Joseph W.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346140R, B41J 2045

Patent

active

052219313

ABSTRACT:
A method of driving an ink jet head for gradient recording uses an electrical signal comprising an expanding pulse and a reducing, driving pulse. The signal is applied to a transducer such as a piezoelectric element to vary the space of an ink path and discharge ink as a droplet from a discharge port. The width and voltage of the driving pulse are only both increased or both decreased in response to changes in the recording data, with the ratio of the width to the voltage remaining constant. This driving method simplifies circuit construction, and provides for an increased range of droplet diameters and, accordingly, improved gradient recording. An apparatus for performing the method is also disclosed.

REFERENCES:
patent: 4521786 (1985-06-01), Bain
patent: 4561025 (1985-12-01), Tsuzuki
patent: 4563689 (1986-01-01), Murakami
patent: 4714935 (1987-12-01), Yamamoto
patent: 4897665 (1990-01-01), Aoki

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