Patent ID: 8698713
Filing Date: 2014-04-15
Classification: G03B,G09G,H04N

Abstract:
1. A display system, comprising: a screen including a substrate on which a plurality of parallel fluorescent stripes are formed to be along a first direction and spaced from one another along a second direction distinct from the first direction, wherein adjacent fluorescent stripes are made of different fluorescent materials that absorb light at an excitation wavelength to emit light of different colors, respectively; an optical module to produce a plurality of excitation optical beams of light at the excitation wavelength, wherein each excitation optical beam is modulated to carry image data of different colors and the excitation optical beams collectively carry multi-colored image data for an image to be displayed on the screen, wherein the optical module includes a beam scanning mechanism that scans, along the second direction, the excitation optical beams on to the screen at different and adjacent screen positions along the first direction in one screen segment of the screen, to produce different scan lines along the second direction, respectively, in the screen segment, to cause the screen to emit light at different times at different positions in each scan line along the second direction and, to shift the excitation optical beams to other screen segments at different positions in the screen along the first direction, one screen segment at a time, to render images on the entirety of the screen; one or more optical sensors to detect light from the screen; and a feedback control loop that directs output of the one or more optical sensors to the optical module as a feedback signal, wherein the optical module responds to the feedback signal to detect an alignment error of the excitation beam on the screen, and, in response to the detected alignment error, the optical module operates to control the excitation beam to correct the detected alignment error.