Accession Number : AD0687740

Title :   ULTRA HIGH CONTRAST, SOLID STATE TELETYPE DISPLAY.

Descriptive Note : Technical note ELTN-1,

Corporate Author : SIGMATRON INC GOLETA CALIF

Personal Author(s) : Soxman,E. J. ; Hebert,Henry J.

Report Date : 10 MAR 1969

Pagination or Media Count : 46

Abstract : A design study is reviewed to demonstrate the feasibility of fabricating an all solid state alphanumeric display terminal. The visual display readout is achieved with a vacuum deposited, electroluminescent thin film structure incorporating an ultrahigh contrast, dark dielectric layer on a glass substrate. A modular design permits expandable display construction. As an example, a three-line display terminal is described with each line providing eighty alphanumeric characters. Individual characters are generated by the selective excitation of any combination of the individual electroluminescent elements in a 35 cell (5 x 7) rectangular matrix. The display panel case, approximately 4 inches high x 17 inches wide x 6 inches deep, accomodates discrete solid-state circuitry for switching the display. Additional peripheral control circuitry can be packaged in a separate chassis of approximately 2-1/2 cubic feet. Recent state-of-the-art improvements in both functional lifetime and brightness contrast indicate that thousands of hours of display readability can be expected even under ambient illumination of several hundred foot-candles. (Author)

Descriptors :   (*TELETYPE SYSTEMS, DISPLAY SYSTEMS), ELECTROLUMINESCENCE, FILMS, DIELECTRIC FILMS, FEASIBILITY STUDIES, PHOSPHORESCENT MATERIALS

Subject Categories : Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE