Electronic and luminance mechanisms in ACTFEL display devices

Alberto Aguilera, University of Texas at El Paso


The main objective of this study was to model a.c. thin-film electroluminescent (ACTFEL) displays devices as a dynamical system. Qualitative comparison of the predicted results with measurable variables is given. It is intended to explain certain unusual behavior that other models cannot or require many assumptions, in particular, the presence of oscillations in luminance and current output waveforms for a trapezoidal voltage pulse input. ^ The sets of equations describing the behavior of the device under 4 different cases are presented. Analysis of the device in steady state is obtained in an analytical manner. The time-dependent output for a trapezoidal voltage pulse excitation is obtained by numerically solving the describing set of equations. ^ An approximation for the analytical expression of the spatial electric field distribution in the bulk of the phosphor is presented. ^ These results are compared with experimental output for ZnS:Mn and SrS:Ce/SrS:Cu devices. The predictions of the models and their differences are discussed. ^

Subject Area

Engineering, Electronics and Electrical

Recommended Citation

Aguilera, Alberto, "Electronic and luminance mechanisms in ACTFEL display devices" (1998). ETD Collection for University of Texas, El Paso. AAI9919355.