Printhead and printing apparatus

Details Printhead and printing apparatus Printhead and printing apparatus

2008-11-13

2010-10-05

Huffman, Julian D (Department: 2853)

Incremental printing of symbolic information

Ink jet

Controller

C347S009000

Reexamination Certificate

active

07806492

ABSTRACT:
A printhead in which the voltage fluctuation absorption range of a MOS transistor serving as a constant current source is narrowed according to constant current driving. The printhead includes a controller which controls voltage fluctuations to adjust a current supplied to a plurality of printing elements. The printhead also includes a DC/DC converter which outputs a voltage of a voltage value to be applied to a plurality of printing elements from outside a printing element substrate.

REFERENCES:
patent: 5519417 (1996-05-01), Stephany et al.
patent: 6290334 (2001-09-01), Ishinaga et al.
patent: 2003/0142164 (2003-07-01), Nishida
patent: 2004/0125157 (2004-07-01), Edelen et al.
patent: 2005/0041049 (2005-02-01), Masuda
patent: 2005/0206685 (2005-09-01), Hirayama

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