Incremental printing of symbolic information – Ink jet – Controller
Patent
1996-08-29
1998-09-08
Le, N.
Incremental printing of symbolic information
Ink jet
Controller
347 14, B41J 2938
Patent
active
058051775
ABSTRACT:
A driving method for driving an ink ejection device operated in shear mode. In order to stably eject ink independently of driving frequency and to obtain an excellent print quality regardless of temperature variation, a first drive waveform is used under a critical temperature, e.g., 25.degree. C., and a second drive waveform is used above the critical temperature. The first drive waveform includes a first pulse signal A for ejecting ink from a nozzle and a second pulse signal B for braking the retraction of meniscus. The second pulse signal B is applied to an actuator before the application of the first pulse signal A. A time duration of the first pulse signal A is substantially equal to a predetermined time duration T defined by a time duration for the pressure wave to propagate one end to the other in a lengthwise direction of an ink channel. The second drive waveform includes a third pulse signal C for ejecting ink and a fourth pulse signal D for canceling out pressure fluctuations remaining in the ink after ejection. The time duration of the third pulse signal C is substantially equal to 3 T, and that of the fourth pulse signal D, 1.7 T.
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Brother Kogyo Kabushiki Kaisha
Dickens C.
Le N.
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