Method for driving ink jet recording head and apparatus therefor

Details Method for driving ink jet recording head and apparatus therefor Method for driving ink jet recording head and apparatus therefor

1994-01-25

1996-09-03

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Controller

347 15, 347 70, B41J 2045

Patent

active

055528090

ABSTRACT:
An ink jet printing head which prints image data with ink droplets without impairing print quality or causing the recording paper to be excessively wetted. The ink jet recording head includes pressure producing chambers communicating with nozzle openings, and piezoelectric vibrating elements for expanding and contracting the pressure producing chambers. Whether print data is graphics image data or text data is determined by a data judging unit, and as a result of the determination, a time constant of a variable time constant adjusting unit is set to a longer time in the case of printing image data than in the case of printing text data. Also the pressure producing chambers are caused to expand without undergoing damped oscillation for a time which is longer than the natural vibration cycle of the piezoelectric vibrating element.

REFERENCES:
patent: 4471363 (1984-09-01), Hanaoka
patent: 4561025 (1985-12-01), Tsuzuki
patent: 5146236 (1992-09-01), Hirata et al.
Patent Abstracts Of Japan vol. 14, No. 478 (M-1036) 18 Oct. 1990 (JPA 2 192 947).
Patent Abstracts Of Japan vol. 9, No. 34 (M-357) (1757) 14 Feb. 1985 (JPA 59 176 055).
Patent Abstracts Of Japan vol. 15, No. 452 (M-1180) 18 Nov. 1991 (JPA 03 193 456).

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