Temperature detection circuit for recording head and...

Details Temperature detection circuit for recording head and... Temperature detection circuit for recording head and...

2007-07-03

2007-07-03

Huffman, Julian D. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Controller

C347S019000

Reexamination Certificate

active

10990673

ABSTRACT:
A recording head performing recording with thermal energy and having a temperature sensor. The sensor measures the temperature of the recording head with minimal susceptibility to common mode noise. The sensor includes a p-n junction of a semiconductor provided inside the recording head. Temperature detection is performed by converting a first voltage value at a P-side portion of the sensor and a second voltage value at a N-side portion of the sensor into respective digital data. A difference data of the respective digital data is calculated. Based on the difference data, the temperature of the recording head can be determined.

REFERENCES:
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patent: 5638097 (1997-06-01), Takayanagi et al.
patent: 5760797 (1998-06-01), Koizumi et al.
patent: 6890097 (2005-05-01), Tanaka
patent: 5-050590 (1993-03-01), None

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