Title:
CONTROLLING COLOR SHIFT IN EL PHOSPHORS
Document Type and Number:
WIPO Patent Application WO2000028515
Kind Code:
A8
Abstract:
An El lamp is powered by bursts of high frequency signal (21, 22) repeated at low frequency ( tau ), i.e. having a low duty cycle envelope (26), in order to shift the color of light emitted by the phosphor in the lamp without degrading the life of the lamp. The bursts include one or more consecutive cycles of a high frequency signal or several closely spaced cycles of a high frequency signal.
Inventors:
COGHLAN WILLIAM A
ZOVKO CHARLES E
KINNALLY EDWARD L
ZOVKO CHARLES E
KINNALLY EDWARD L
Application Number:
PCT/US1999/025163
Publication Date:
July 20, 2000
Filing Date:
October 27, 1999
Export Citation:
Assignee:
DUREL CORP (US)
International Classes:
H05B44/00; (IPC1-7): G09G3/10
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