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Proceedings Paper

Energy Recovery In El Drive Systems
Author(s): C. C. Jung; T. A. Gielow
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Paper Abstract

Thin-Film Electroluminescent (TFEL) display systems can consume large amounts of energy since their operation involves the repetitive charging and discharging of an inherently capacitive panel. Typically, energy stored in the panel capacitance is discharged into a resistance where it is dissipated in the form of heat. An energy recovery drive scheme involves the return of some portion of this stored panel energy into the supply from which it originated. In addition to recovery of the stored energy, the efficiency of the initial energy transfer may also be increased by use of an energy recovery scheme. This paper covers several topics relevant to the concept of energy recovery. First discussed are the panel and system characteristics, and the approximations which are used to allow simple modeling of a TFEL panel and associated drivers. Next, several conventional (non-energy recovery) drive schemes are analyzed, to be used as a reference in determining the energy savings which may result by the use of one of the energy recovery schemes which follow. A hypothetical drive scheme representing the mathematical limit on peak efficiency as well as the minimum peak charging current is examined. Finally, panel and system characteristics which are conducive to the implementation of energy recovery schemes are identified.

Paper Details

Date Published: 5 May 1986
PDF: 8 pages
Proc. SPIE 0624, Advances in Display Technology VI, (5 May 1986); doi: 10.1117/12.961225
Show Author Affiliations
C. C. Jung, Hycom Incorporated (United States)
T. A. Gielow, Hycom Incorporated (United States)

Published in SPIE Proceedings Vol. 0624:
Advances in Display Technology VI
Elliott Schlam, Editor(s)

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