Patent ID: 7878657

Claim:
A scanning beam display system, comprising: an excitation light source to produce at least one excitation beam at an excitation wavelength; a servo light source to produce at least one servo beam at a servo beam wavelength that is different from the excitation wavelength; a beam scanning module to receive the excitation beam and the servo beam and to scan the excitation beam and the servo beam; a light-emitting screen positioned to receive the scanning excitation beam and the servo beam and comprising a light-emitting area which comprises (1) parallel light-emitting stripes which absorb light of the excitation beam to emit visible light, and (2) one or more stripe dividers parallel to and spatially interleaved with the light-emitting stripes with each stripe divider being located between two adjacent stripes, each stripe divider being optically reflective to at least the servo beam; an optical servo sensor positioned to receive light of the servo beam reflected by the stripe dividers and to produce a monitor signal indicative of positioning of the servo beam on the screen; and a control unit operable to, in response to the positioning of the servo beam on the screen in the monitor signal, adjust timing of optical pulses carried by the scanning excitation beam based on a relation between the servo beam and the excitation beam to control the spatial alignment of spatial positions of the optical pulses in the excitation beam on the screen.