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:
Jul. 11, 2006
Filed:
Jul. 28, 2003
Christopher James Newton Fryer, Cottenham, GB;
Stefan Michael Ross, Westfield Lane, GB;
Christopher James Newton Fryer, Cottenham, GB;
Stefan Michael Ross, Westfield Lane, GB;
Pelikon Limited, Caerphilly, GB;
Abstract
A controlleris provided for use with a multi-segment electroluminescent display. Control signals C–Ccontrol a plurality of half H-bridges H–H, the terminals of the half H-bridges being connected respectively to groundand to a high voltage DC supplyso that the half H-bridges each provide an AC voltage. One of said half H-bridges provides a common output Vcommon and the remaining H-bridges provide drive voltages V–Vfor the segments of the display. During each cycle, the controllercauses the drive outputs V–Vto either be in phase or in anti-phase with the common output Vcommon. This selectively turns the segments on and off at a rate much higher than the human eye can perceive. The brightness of the segments is controlled by varying the proportion of the time that each segment is illuminated.