High Contrast Electroluminescent Numeric Readout Device

摘要

The Microelectronics Research and Development Center of Rockwell International has completed the program encompassing the design, fabrication, and characterization of a High Contrast Electroluminescent Readout Device. The device consists of EL seven-segment numeric displays incorporating a high contrast background layer. The device also contains within its sealed package, logic and drive circuitry to operate the displays from a computer output data stream, having conventional 5-volt logic and ECD input. The package design also allows stacking the displays end to end, resulting in a multi-digit computer-type terminal display. The displays delivered during this program contain internal decode and drive circuitry not heretofore available in EL displays. The ten-pin dual in-line packages with high contrast thin film EL emitter have excellent legibility in normal ambient and good legibility in high ambient light levels. Since the EL thin film emission results by a tunneling mechanism, the display is not temperature sensitive and operates over a wide temperature range, easily meeting military temperature requirements. This report describes the design, development and fabrication of the high-contrast EL displays and details the characteristics and performance of the displays as compared to program objectives. (Author)