ELECTROLUMINESCENT THIN FILM RESEARCH.
Abstract
Through modifications in the source design and vacuum deposition procedures leading to increased activator concentration, improved thin film, electroluminescent (EL) phosphor materials were made having outstanding characteristics for display applications. The useful operating lifetime of these films, even without sealing, was extended to thousands of hours. Large area substrates with high resolution electrode patterns could be fabricated. To scan X-Y, crossed-electrode panels, several solid-state switching circuits were designed. The highest brightness contrast yet reported for an EL display viewed under appreciable levels of ambient illumination, was achieved with a dark-field structure unique to thin films. Also developed was a unique transparent display which exhibited high brightness contrast, enabled visual displays to be superimposed and facilitated direct contact exposure of photographic emulsions. Utilizing the broadband emission of the thin film phosphor, a multicolor display which employed optical transmission filters was demonstrated. The development was initiated of a practical EL thin film display patterned after an aircraft engine performance indicator. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 10, 1966
- Accession Number
- AD0800992
Entities
People
- E. J. Soxman