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:
Sep. 06, 1983
Filed:
Feb. 08, 1982
Ciro Guajardo, Harbor City, CA (US);
Dennis B Chabala, Huntington Beach, CA (US);
Teledyne Industries, Inc., Los Angeles, CA (US);
Abstract
A circuit for controlling one or more light emitting diodes is disclosed. The circuit is designed to supply current to the diodes from an input voltage source in response to a control signal. The circuit provides a predetermined level of current to the diodes which is substantially independent of the magnitude of the input voltage. The circuit also includes a switching function which operates to switch off the diode current when the control signal exceeds a first level of control voltage. When the control signal is reduced below a second level of control voltage, the diode current is switched to the predetermined level of current.