Patent ID: 8556430

Claim:
A scanning beam display system, comprising: a light module to direct and scan at least one excitation beam having optical pulses that carry image information and at least one servo beam at a servo beam wavelength different from a wavelength of the excitation beam; a screen positioned to receive the scanning excitation beam and the servo beam and comprising a light-emitting layer of parallel light-emitting stripes which absorb light of the excitation beam to emit visible light to produce images carried by the scanning excitation beam, the screen configured to reflect light of the servo beam towards the light module to produce servo feedback light; and an optical servo sensor module positioned to receive the servo feedback light and to produce a servo feedback signal indicative of positioning of the servo beam on the screen, wherein the light module is responsive to the positioning of the servo beam on the screen in the servo feedback signal to adjust timing of the optical pulses carried by the scanning excitation beam to control the spatial alignment of spatial positions of the optical pulses in the excitation beam on the screen.