Printhead and printhead driving method

Details Printhead and printhead driving method Printhead and printhead driving method

2007-11-06

2007-11-06

Luu, Matthew (Department: 2861)

Incremental printing of symbolic information

Ink jet

Controller

C347S010000, C347S011000

Reexamination Certificate

active

10896074

ABSTRACT:
A printhead driving method in a power source device to output a printhead driving voltage, for generating an optimum voltage for a characteristic of the printhead attached to a printing apparatus, without controlling an output voltage with high accuracy. The printhead is provided with a reference voltage source to set an output voltage of a head driving power source. A head driving power circuit incorporated in the printing apparatus compares a value obtained by dividing the reference voltage with a value obtained by dividing the output voltage from the power circuit and performs control so as to eliminate an error. Further, the printhead is provided with a non-volatile memory, and data to supply driving energy to optimize a discharge characteristic of the printhead is obtained upon final test of manufacturing process by using a test device having a similar construction to that of the head driving power circuit incorporated in the printing apparatus. The data is written into the non-volatile memory. When the printhead is attached to the printing apparatus, the data is read from the memory and a driving pulse used in actual printing is determined based on the data.

REFERENCES:
patent: 4313124 (1982-01-01), Hara
patent: 4345262 (1982-08-01), Shirato et al.
patent: 4463359 (1984-07-01), Ayata et al.
patent: 5731828 (1998-03-01), Ishinaga et al.
patent: 6575548 (2003-06-01), Corrigan et al.
patent: 8-118628 (1996-05-01), None

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