The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 23, 2010
Filed:
Apr. 03, 2007
Yoshiaki Takayanagi, Kanagawa-ken, JP;
Yoshiaki Takayanagi, Kanagawa-ken, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
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.