Ink droplet ejection drive method and apparatus using ink-nonemi

Details Ink droplet ejection drive method and apparatus using ink-nonemi Ink droplet ejection drive method and apparatus using ink-nonemi

1998-01-15

2000-10-31

Coles, Edward L.

Facsimile and static presentation processing

Static presentation processing

Dot matrix array

347 6, 347 9, 347 10, 347 11, 347 54, 347 57, 399 58, 399 67, G06F 1500

Patent

active

061411132

ABSTRACT:
In an ink droplet ejection drive method and apparatus, after plural ink emission pulses are generated for each one-dot print instruction or after plural ink emission pulses for plural one-dot print instructions, an ink nonemission pulse is generated to reduce residual pressure wave oscillation in an ink channel. The emission pulses and the nonemission pulse have the same voltage polarity and amplitude. The emission pulse has a time width corresponding to a one-way propagation time T of pressure wave in the ink channel, i.e., 8 .mu.sec., while the nonemission pulse has a time width in a range of 0.3 T to 0.7 T or 1.3 T to 1.8 T. A period between the end time of the last emission pulse and the intermediate time corresponding to the midpoint between the start time and the end time of the nonemission pulse is determined to be in a range of 2.35 T to 2.65 T.

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