HEAD SUBSTRATE, PRINTHEAD, HEAD CARTRIDGE AND PRINTING APPARATUS

WIPO Patent Application WO2006121204

A9

This invention is directed to: a printhead substrate which employs a constant current driving method and can suppress power consumption in a standby state, prevent an increase in printhead temperature, and stably discharge ink; a printhead using the printhead substrate; a head cartridge incorporating the printhead; and a printing apparatus using the printhead. The head substrate includes a plurality of printing elements; a plurality of driving elements which are provided in correspondence with the plurality of printing elements and drive the plurality of printing elements; a reference voltage generation circuit (105) which generates a reference voltage; a reference current generation circuit which generates a first reference current on the basis of the generated reference voltage; a plurality of constant current sources, each of which generates a constant current to drive the plurality of printing elements on the basis of the generated first reference current; and a switch (108) which controls supply of the first reference current in accordance with a printing operation.

JP2955396	[Title of Invention] Inkjet recording device
JP4137027	Inkjet head substrate, manufacturing method of the substrate, and inkjet head using the substrate
JPH11138819	INK-JET RECORDING HEAD AND ITS MANUFACTURE, AND INK-JET RECORDING DEVICE EQUIPPED WITH THE INK-JET RECORDING HEAD

HIRAYAMA NOBUYUKI (JP)
SAKURAI MASATAKA (JP)

PCT/JP2006/309883

February 28, 2008

May 11, 2006

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CANON KK (JP)
HIRAYAMA NOBUYUKI (JP)
SAKURAI MASATAKA (JP)

B41J2/05

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