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:
Jun. 24, 1997
Filed:
Jan. 17, 1995
Applicant:
Inventor:
John Browne, Oakville, CA;
Assignee:
Mark IV Industries Limited, Mississauga, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
345111 ; 345 84 ; 345214 ;
Abstract
An array of display elements are driven between ON and OFF positions where an element bright side is or is not displayed in the viewing direction by a magnetic field individual to each element. A Hall effect switch is located in each field and used to control a circuit in accord with the field polarity. The circuit may be used to provide lights which augment the appearance of an element in a viewing direction. A power control circuit using a phase control and a clipper is used to power the lights and the Hall element.