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:
Mar. 02, 1993
Filed:
May. 09, 1990
Applicant:
Inventors:
Barry W Herold, Boca Raton, FL (US);
Kevin Mclaughlin, Lake Worth, FL (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
340781 ; 34082544 ; 307570 ;
Abstract
A low power, dual mode BIMOS circuit generates a required drive voltage for illuminating an electroluminescent display panel from a low voltage, preferably a single cell. The BIMOS circuit comprises at least one bipolar transistor, at least one MOS transistor, an output voltage sensor, and a controller operating in a complementary fashion to disable a first clock signal coupled to the at least one bipolar transistor subsequent to enabling operation of the at least one MOS transistor for controlling the charging current used to generate the output voltage.