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:
Apr. 08, 2014
Filed:
Sep. 21, 2010
Yutaka Uratani, Shiga-ken, JP;
Mikihiro Yamashita, Shiga-ken, JP;
Yutaka Uratani, Shiga-ken, JP;
Mikihiro Yamashita, Shiga-ken, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A Peltier element cooling control circuit that accurately controls a small number of elements with a simple structure. First and second amplification circuits are connected between a current detection resistor detecting current of a Peltier element and a current control circuit performing current control on the Peltier element based on voltage proportional to the current. One of two resistors determines the amplification rate of the first amplification circuit includes a thermistor. When the ambient temperature is equal to a predetermined temperature or greater, the output voltage of the second amplification circuit is supplied to the current control circuit to control the current of the Peltier element so as to be constant. When the ambient temperature is less than the predetermined temperature, the output voltage of the first amplification circuit is supplied to the current control circuit to control the current of the Peltier element in accordance with the temperature characteristics.