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):

Report Date:

1969-03-10

Pagination or Media Count:

46.0

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 2-12 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

Subject Categories:

  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE