Back to results
US 6,186,611 B1Granted
Gradation record control apparatus for ink jet printer
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsTadashi Shiraishi, Masakazu Mizusaki, Shinsuke Sato
Life of this patent
Estimating the term…
Abstract
In a graduation record control apparatus, as a power source, a voltage of a sawtooth waveform is generated and used, and a part of this sawtooth waveform voltage is used at different timings to apply different voltages to the electrodes. Thus, a satisfactory gradation recording is carried out by changing the dot sizes.
Claims16
A gradation record control apparatus for an ink jet printer, said gradation record control apparatus comprising:
- a plurality of nozzles;
- ink jet energy generating means, provided for each of said plurality of nozzles, for generating an energy to jet ink of different quantities from said plurality of nozzles according to a voltage value to be inputted,
- modulation voltage generating means for generating a modulation voltage having a value which changes at a predetermined cycle that is equal to a printing cycle which determines a printing timing of each of said nozzles, and
- output means for outputting a variable part of said predetermined cycle of said modulation voltage to said ink jet energy generating means as said voltage value to control a quantity of said ink to be jetted.
1 more element
A gradation record control apparatus for an ink jet printer, said gradation record control apparatus comprising:
- a plurality of nozzles;
- ink jet energy generating means, provided for each of said plurality of nozzles, for generating an energy to jet ink of different quantities from said plurality of nozzles according to a voltage value to be inputted,
- modulation voltage generating means for generating a modulation voltage having a value which changes at a predetermined cycle that is equal to a printing cycle which determines a printing timing of each of said nozzles,
- control signal generating means for outputting to selecting means, at said predetermined cycle, control signals of different phases according to a quantity of ink to be jetted, said selecting means for, responsive to said control signals, selecting a variable part of said predetermined cycle of said modulation voltage, and
- output means for outputting said variable part of said predetermined cycle of said modulation voltage to said ink jet energy generating means as said voltage value.
2 more elements
Dependencies are inferred from the claim text.