The Evolution of Projection Displays. Part II: From Mechanical Scanners to Microdisplays

摘要

The development of projection-display systems has encompassed numerous technologies through the decades. CRTs have always played a crucial role, but other critical technologies such as the Eidophor oil-film light valve, Hughes light amplifier, liquid-crystal devices in various forms, diffraction gratings, mechanical scanners, and digital micromirrors have all played an important role in the evolution of this technology. The second installment of this two-part series explores the innovations of the modern era of projection technology, from the 1990s to the present day, exploring how the development of LCOS, DLP, and LCD technologies threatened the dominance of light valves and CRTs. Part I of this series was published in the May 2008 issue of Information Display, which can be accessed at www. information display.org.