AN ELECTROLUMINESCENT CROSSED-GRID DISPLAY.
Abstract
The organization and performance of an electroluminescent crossed grid display system has been studied and an experimental model has been constructed demonstrating the basic concepts developed during the study. This work is based on using a display panel that does not have integral storage; thus a buffer memory is included to minimize the load on the computer data-source, and to periodically refresh the displayed information. It is indicated that an image-organized magnetic core memory is most suitable for this system. Both semiconductor and magnetic circuits were investigated for driving the display, and magnetic circuits were found to provide superior performance and advantages. An improved technique for display panel construction permits construction of a large display surface from a number of individual modules. The experimental model has an 8 by 8 inch display with 16 line per inch resolution. An entire image may be erased and replaced with an entirely new image in less than one frame (1/30 second). Brightness is about .8 footlamberts for an average contrast ratio of about 20:1 and is independent of the density of displayed information. The techniques used are compatible with future use of light amplifiers or improved EL materials to provide increased brightness. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1965
- Accession Number
- AD0615505
Entities
People
- Joseph Hallett
Organizations
- Sylvania Electric Products