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:
Dec. 07, 1993
Filed:
Jun. 08, 1992
Applicant:
Inventors:
Patrick D Dean, Armada, MI (US);
Abbas T Sabbah, Sterling Heights, MI (US);
Assignee:
Chrysler Corporation, Highland Park, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60Q / ;
U.S. Cl.
CPC ...
315 77 ; 3152 / ; 315210 ; 315224 ; 315307 ;
Abstract
A pulse width dimming system responsive to low frequency pulse width modulated signals of various duty cycles employs a single charging capacitor in a charge pump circuit connected between a voltage source and the output of an FET for developing voltage pulse signals for controlling current through a field effect transistor used to control the intensity of lamps in a vehicle instrument panel.