Patent ID: 8814364
Filing Date: 2014-08-26
Classification: G01J,G02B,G03B,H04N

Abstract:
1. 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, the screen comprising a light-emitting layer of parallel light-emitting stripes that absorb light of the excitation beam to emit visible light to produce images carried by the scanning excitation beam, wherein an excitation side of the parallel light-emitting stripes includes a plurality of diffusively reflective servo marks that are spaced apart from each other to diffusively reflect servo beam light to produce servo feedback light, areas between the diffusively reflective servo marks including a specularly reflective region to specularly reflect servo beam light; and an optical servo sensor module positioned on an excitation side of the screen to receive diffusively reflected 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 servo feedback signal to adjust timing of the optical pulses carried by the scanning excitation beam while being scanned across the screen to control spatial positions of the optical pulses on the screen.