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.:

US 8508377 B1

PDF
Full Text
Expired
Date of Patent:
Aug. 13, 2013

Filed:

Sep. 17, 2010
Applicant:

Ming-yuan Hsu, Taipei, TW;

Inventor:

Ming-Yuan Hsu, Taipei, TW;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A monitoring circuit includes a first detecting unit, a second detecting unit, a comparing unit and an indicating unit. The first detecting unit is configured for detecting a temperature of a vehicular lamp and sending out a first signal. The second detecting unit is configured for detecting the surrounding temperature and sending out a second signal. The comparing unit is configured for comparing the first signal with the second signal, and controls the indicating unit to show the state of the vehicular lamp according to the compared result. When the first signal is higher than the second signal, the comparing unit controls the indicating unit to show that the vehicular lamp is unlit. When the first signal is equal to or lower than the second signal, the comparing unit controls the indicating unit to show that the vehicular lamp is lit.


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