Servo Feedback Control Based on Designated Scanning Servo Beam in Scanning Beam Display Systems with Light-Emitting Screens
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Accused Products
Abstract
Scanning beam display systems that scan one 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 feedback control.
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Citations
30 Claims
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1-20. -20. (canceled)
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21. A scanning beam display system, comprising:
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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. - View Dependent Claims (22, 23, 24, 25, 26)
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27. A method for controlling a scanning beam display system, comprising:
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scanning one or more excitation beams modulated with optical pulses to carry images on a screen to excite parallel light-emitting strips to emit visible light which forms the images; scanning a servo beam at an optical wavelength different from an optical wavelength of the one or more excitation beams, on the screen; detecting light of the servo beam from the screen to obtain a servo signal indicative of positioning of the servo beam on the screen; and in response to the positioning of the servo beam on the screen, controlling the one or more scanning excitation beams to control the spatial alignment of spatial positions of the optical pulses in each excitation beam on the screen. - View Dependent Claims (28, 29, 30)
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Specification