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:
Apr. 07, 2009
Filed:
May. 01, 2002
Applicants:
Dwayne Burns, West Linton, GB;
Ian Underwood, Edinburgh, GB;
Inventors:
Dwayne Burns, West Linton, GB;
Ian Underwood, Edinburgh, GB;
Assignee:
Microemissive Displays Limited, Edinburgh, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G 3/32 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and circuit for controlling a light emitting element such as a light emitting diode. A pulse coded modulated signal of a set duration is supplied to the element (LED) so as to cause the element to emit light for a period of time depending on the duration of the signal, the apparent brightness of the element depending on said period of time. The signal can be applied by sequentially activating each of a plurality of bit lines (B, B, B), each comprising a storage node (S, S, S), for a binary weighted period of time.