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:
Feb. 24, 2009
Filed:
Dec. 10, 2004
William John Testin, Indianapolis, IN (US);
William John Testin, Indianapolis, IN (US);
Thomson Licensing, Boulogne-Billancourt, FR;
Abstract
A temperature control apparatus is suitable for use in devices such as consumer electronics devices having different thermal characteristics. According to an exemplary embodiment, the temperature control apparatus includes a fan having a field winding (F) and a speed controller for providing a speed control signal to the field winding (F) responsive to a first control signal to control a rotating speed of the fan. First and second terminals of the fan enable operating power to be provided to the field winding (F) and the speed controller. At least one of the first and second terminals is operatively coupled to a first voltage source. A third terminal of the fan provides the first control signal to the speed controller, and is operatively coupled to a second voltage source. The temperature control apparatus further includes a temperature measuring circuit operative to measure a temperature and provide a temperature indicating signal indicating the measured temperature, a processor operative to provide a second control signal responsive to the temperature indicating signal, and control circuitry operative to provide the first control signal to the third terminal of the fan responsive to the second control signal.