Droplet ejection device and droplet ejection method

Incremental printing of symbolic information – Ink jet – Controller

Reexamination Certificate

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Details

Other Related Categories

C347S012000

Type

Reexamination Certificate

Status

active

Patent number

07604311

Description

ABSTRACT:
In a droplet ejection device, a latch circuit acquires discharge data in which a resolution is set up for each resolution section in a transport direction of a recording medium, and sets data elements in each resolution section for respective ones of a plurality of nozzles. An output enable signal generating unit generates an output enable signal periodically at intervals of a different distance. A drive waveform applying unit applies a drive waveform to a common electrode line of piezoelectric elements of the nozzles in synchronization with the output enable signal, the drive waveform having a time to discharge each piezoelectric element gradually. A switching circuit turns on or off a switch based on a logical AND of the output enable signal and the discharge data and grounds an individual electrode of each piezoelectric element.

REFERENCES:
patent: 6003969 (1999-12-01), Freret, Jr.
patent: 6331052 (2001-12-01), Murai et al.
patent: 2003/0107611 (2003-06-01), Kim
patent: 2004/0183842 (2004-09-01), Kobayashi et al.
patent: 2006/0087525 (2006-04-01), Jackson Pulver et al.
patent: 2002-120366 (2002-04-01), None
patent: 2002-273890 (2002-09-01), None

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