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

摘要

The development of projection-display systems has encompassed numerous technologies since its beginnings in the early 1930s. CRTs have always played a crucial role, but other critical technologies such as the Eidophor oil-film light valve, Hughes's 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 projection systems. The first installment of this two-part article explores the innovations from the 1930s until the early 1990s. In Part II, to be published in the August issue of ID, we 'll continue the story to the present day.