Scanning beam display systems that scan at least one invisible servo beam and an excitation beam onto a screen that emits visible light under excitation of the light of the excitation beam and control optical alignment of the excitation beam based on positioning of the servo beam on the screen via a...http://www.google.es/patents/US7878657?utm_source=gb-gplus-sharePatente US7878657 - Servo feedback control based on invisible scanning servo beam in scanning beam display systems with light-emitting screens
Servo feedback control based on invisible scanning servo beam in scanning ...
