Accession Number : AD0661092

Title :   GALLIUM-PHOSPHIDE LIGHT-EMITTING DIODE ARRAY.

Descriptive Note : Quarterly rept. no. 1 1 May to 31 Jul 67,

Corporate Author : IBM FEDERAL SYSTEMS DIV OWEGO N Y ELECTRONICS SYSTEMS CENTER

Personal Author(s) : Farrell,Henry C. ; Lynch,Robert J.

Report Date : OCT 1967

Pagination or Media Count : 27

Abstract : The object of the research is the design and fabrication of a versatile experimental display module incorporating an array of 60 gallium-phosphide diodes as light-emitting elements. This effort includes the associated control circuitry for accessing, latching, and providing the necessary input waveforms and impulses for X-grid and Y-grid access. This report covers the work accomplished towards the development of an experimental display module using red-light-emitting gallium-phosphide diodes. Both analog and digital X - Y scanning circuits were breadboard tested. Techniques for measuring the light output and for selecting diodes for high-density arrays were also developed. (Author)

Descriptors :   (*DISPLAY SYSTEMS, SEMICONDUCTOR DIODES), (*SEMICONDUCTOR DIODES, *LIGHT), (*GALLIUM COMPOUNDS, PHOSPHIDES), MODULES(ELECTRONICS), SCANNING, SHIFT REGISTERS, CIRCUITS, LOGIC CIRCUITS, COLORS, FEASIBILITY STUDIES

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE