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. 20, 2010
Filed:
Sep. 17, 2006
Wen-nan Hsia, Taipei Hsien, TW;
Wen-Nan Hsia, Taipei Hsien, TW;
Wistron Corporation, Hsi-Chih, Taipei Hsien, TW;
Abstract
A time limiter protects a light emitting diode coupled to an output of a current driver by preventing the light emitting diode from working overtime under a high current and from being overheated and burnt down, no matter whether a pulse width of an input pulse is larger or shorter than a delay time of the time limiter. The input pulse may be a periodic continuous input pulse, or a continuously-enabled pulse generated from a run-time error of software or hardware. The time limiter should be coupled with a discharging circuit for discharging the capacitor in the RC circuit while a periodic continuous input pulse was inputted, to keep the precise original pulse period and pulse width of the enabling signal to be outputted, and to prevent the time limiter from malfunctioning.