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:
Jul. 28, 2009
Filed:
Mar. 01, 2005
Leonard DE Oto, Springfield, OH (US);
Mitchell P. Henman, Sidney, OH (US);
Leonard De Oto, Springfield, OH (US);
Mitchell P. Henman, Sidney, OH (US);
Honeywell International Inc., Morristown, NJ (US);
Abstract
An LED current control device () includes a set of one or more LEDs () connected to a current-sensing element () and an external voltage source (V). A sense signal produced by the current-sensing element may be amplified by a sense signal amplifier () and sent to a switching controller (and). The switching controller may perform hysteretic control on the amplified sense signal by controlling a switching elementto turn on and off. The on and off states of the switching element respectively enables and disables power from the external voltage source to the LEDs. As such, hysteretic control may be performed on the current in the LEDs.