Human Factors Design Criteria for Liquid Crystal Displays
Abstract
Liquid crystal display (LCD) technology offers several potential advantages over CRT display media, especially as applied to the airborne environment. CRT characteristics of size, weight, power requirements and fragility have been of concern to designers incorporating them into present and proposed aircraft cockpits. In addition, in high ambient brightness environments, CRT imagery may appear 'washed out' due to light reflection from the CRT faceplate and phosphor. By comparison, the LCD offers a display media with significant power and form factor savings in addition to an inherent capacity to reflect incident light so that high ambient luminance conditions increase display brightness without causing a loss of contrast. In order that LCD devices be applied most effectively as candidate replacements for CRT's, several human factors issues need to be addressed. Specifically, the percent active area and required element density have been identified as areas of greatest concern. Liquid crystal displays currently being produced have a percent active area of approximately 93 percent with packing densities of 100 elements per inch. If the element density is increased, the percent active area would decrease proportionately, since the amount of dead area per element must remain approximately the same for a given design of the driving electronics.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1976
- Accession Number
- ADA030828
Entities
People
- Wayne L. Martin
Organizations
- Air Force Research Laboratory