Title :
Efficiency and response time of a DCEL ZnS:Mn,Cu powder display determined by sinusoidal frequency analysis
Author :
Barr, D.A. ; Laverty, S.J.
Author_Institution :
Ulster Univ., Jordanstown, UK
fDate :
8/1/1989 12:00:00 AM
Abstract :
The voltage-luminous intensity transfer function for DC electroluminescence (DCEL) ZnS:Mn,Cu powder display panels has been determined by the use of a small-amplitude sinusoidal drive-voltage biased on a DC voltage. Bode representation of this transfer function has revealed a lowpass bandwidth of 200 Hz. Evidence has shown that mean luminous intensity is strongly influenced by the harmonic content of the input voltage, which is limited by the 200 Hz system bandwidth. Consequently, the relationship between DCEL efficiency and system bandwidth has been investigated. The visual perception of luminous intensity has been included in the analysis to show that efficiency is also a function of the number of rows of pixels used in a particular DCEL display.
Keywords :
II-VI semiconductors; copper; electroluminescent displays; manganese; transfer functions; zinc compounds; 200 Hz; Bode representation; DC electroluminescence; DCEL display; DCEL efficiency; II-VI semiconductor; ZnS:Mn,Cu powder; display panels; harmonic content; input voltage; lowpass bandwidth; mean luminous intensity; response time; sinusoidal frequency analysis; small-amplitude sinusoidal drive-voltage; system bandwidth; visual perception; voltage-luminous intensity transfer function;
Journal_Title :
Circuits, Devices and Systems, IEE Proceedings G
