Liquid discharge head and liquid discharge apparatus using...

Details Liquid discharge head and liquid discharge apparatus using... Liquid discharge head and liquid discharge apparatus using...

2011-05-31

2011-05-31

Nguyen, Lam S (Department: 2853)

Incremental printing of symbolic information

Ink jet

Controller

C347S005000, C347S014000

Reexamination Certificate

active

07950765

ABSTRACT:
A compact and highly reliable recording head enabling precise detection of temperature information for each nozzle and rapid as well as highly accurate detection of nozzles with a discharge defect can be achieved. An electrothermal transducing member is provided on a substrate to generate heat energy for discharging liquid from a discharge port. A temperature detecting circuit includes a temperature detecting element for measuring a temperature of the transducing member. The temperature detection circuit includes a constant current circuit, a voltage detecting circuit, and a switching element.

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