A SOLID-STATE SELF-SCANNING DISPLAY DEVICE
GENERAL TELEPHONE AND ELECTRONICS LABS INC BAYSIDE NY BAYSIDE LAB
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Investigation is described of materials for use in a solid-state electroluminescent display de vice in which the electric field for activation of the electroluminescent layer is provided by elastic waves, propagated through a piezoelectric ceramic plating as the substrate for dis play. The first phase was devoted to a search for improved piezoelectic ceramics. In the sec ond phase of the investigation, emphasis was placed on an investigation of the problems asso ciated with integration of the piezoelectric, nonlinear resistive and electroluminescent mate rials into complete display structures. Bright ness and resolution of the display are limited by the fact that the electroluminescent layer ex hibits a nonlinear resistive characteristic at high field strength. The expected effect of im proved propagation characteristics of hot-pressed ceramics has also been assessed. Finally, it has been shown that a significant increase in bright ness can be achieved if the display design is revised. Its output pulses would be used to gate power from an independent source.
- Electrical and Electronic Equipment
- Recording and Playback Devices