LED Multifunction Keyboard Engineering Study.
Abstract
The purpose of this report is to describe the background system definition which formed the basis for the multifunction keyboard engineering study and to describe the procedures employed and results obtained in conducting the study. The study objectives were: (1) the evaluation of the performance of a sunlight readable multifunction switch using an x-y dot matrix light emitting diode (LED) array and incorporating tactile feedback and (2) definition and evaluation of a multifunction keyboard architecture to use the multifunction switch. The procedures and results obtained in the course of this study were specifically directed toward the evaluation of the performance of a LED programmable pushbuton switch (PPS), developed both as an individual unit and as a component of a multifunction keyboard (MFK). While the PPS display is limited to a single 16 x 35 LED array size, the procedures employed in the evaluation are applicable to LED switch displays in general. Similarly, the procedures and results obtained using the PPS units as a four switch MFK module are illustrative of the operation of larger keyboard matrices up to a maximum of 28 switches. This study is divided into three general areas of effort. First was the establishment of requirements for the switch function and MFK architecture and capabilities. The second covers the evaluation of the PPS switch/display module. Incorporated in this work are measurements of display parameters, electrical and mechanical characteristics, and environmental testing. The third area of effort involved the incorporation of the PPS units and their associated logic and refresh control unit (LRCU) into a MFK system.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1984
- Accession Number
- ADA145199
Entities
People
- M. H. Tonkin
- R. J. Spiger
Organizations
- Boeing