Method for compensating shift in on resistance of transistor...

Details Method for compensating shift in on resistance of transistor... Method for compensating shift in on resistance of transistor...

2008-07-02

2011-10-25

Luu, Matthew (Department: 2861)

Incremental printing of symbolic information

Ink jet

Controller

C347S010000, C347S014000

Reexamination Certificate

active

08042897

ABSTRACT:
Disclosed is a method for compensating a shift in an ON resistance of a transistor in a chip of a printhead of an inkjet printer. The method includes determining a value of a life indication parameter of the printhead and comparing the determined value of the life indication parameter of the printhead with at least one predetermined value of the life indication parameter. The at least one predetermined value of the life indication parameter of the printhead is stored in at least one of a memory of the inkjet printer and a memory of the chip of the printhead. Thereafter, a gate voltage input to the transistor is modified based on a difference between the determined value of the life indication parameter and the at least one predetermined value of the life indication parameter of the printhead for compensating the shift in the ON resistance of the transistor.

REFERENCES:
patent: 2005/0140707 (2005-06-01), Imanaka et al.
patent: 2005/0200657 (2005-09-01), Nakazawa

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