RANDOM ACCESS CONTROL OF ELECTROLUMINESCENT ELEMENTS.
Final rept. Jun 64-Jun 65,
RADIO CORP OF AMERICA CAMDEN N J
Pagination or Media Count:
Cadmium selenide CdSe switches were devised to control the luminous emittance of electroluminescent cells in a solid-state display. The technique employed makes use of the hysteresis in CdSe to change the resistance of the material to some low value when a switching voltage is applied. The purpose of this contract was to establish the feasibility of utilizing the hysteretic effect in cadmium selenide to provide switching and storage to an array of electroluminescent cells by investigating the cadmium selenide material, by studying panel structure, and by investigating the addressing of large arrays of these elements. The CdSe material preparation process was varied and the corresponding effects on performance were determined. The physical characteristics of the display panel itself were determined not to possess any properties which might prohibit the use of this technique for large-area displays. Finally the necessary components in any addressing scheme were outlined. The primary problems with this technique are in the area of reproducibility, caused largely by the nonuniformities present in the CdSe material properties. Recommendations for improving the uniformity of the CdSe material were included. Author
- Electrical and Electronic Equipment
- Solid State Physics