Feedback control of display systems with light-emitting screens having excitation light source and phosphor layer
First Claim
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1. A display apparatus comprising:
- a display system includingone or more excitation light sources configured to independently controllably generate light for a plurality of pixels, anda phosphor layer configured to absorb light of the one or more excitation light sources to emit fluorescent light, the phosphor layer including a first region corresponding to a first subset of the plurality of pixels and configured to emit red emissions, a second region different from the first region corresponding to a second subset of the plurality of pixels and configured to emit green emissions, and a third region different from the first and second regions corresponding to a third subset of the plurality of pixels and configured to emit blue emissions,wherein the display system comprises a plurality of light-emitting diodes; and
one or more detector assemblies configured to separately measure intensities of the emitted red, green, and blue emissions and to adjust the one or more excitation light sources based on the measured intensities in real time during a normal display mode of the display system.
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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.
247 Citations
14 Claims
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1. A display apparatus comprising:
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a display system including one or more excitation light sources configured to independently controllably generate light for a plurality of pixels, and a phosphor layer configured to absorb light of the one or more excitation light sources to emit fluorescent light, the phosphor layer including a first region corresponding to a first subset of the plurality of pixels and configured to emit red emissions, a second region different from the first region corresponding to a second subset of the plurality of pixels and configured to emit green emissions, and a third region different from the first and second regions corresponding to a third subset of the plurality of pixels and configured to emit blue emissions, wherein the display system comprises a plurality of light-emitting diodes; and one or more detector assemblies configured to separately measure intensities of the emitted red, green, and blue emissions and to adjust the one or more excitation light sources based on the measured intensities in real time during a normal display mode of the display system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14)
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12. A method of operating a display system, comprising:
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directing light from one or more excitation light sources to a phosphor layer, the phosphor layer including a first region configured to emit red emissions, a second region different from the first region and configured to emit green emissions, and a third region different from the first and second regions and configured to emit blue emissions, wherein directing light from one or more excitation light sources comprises generating excitation light from a plurality of light-emitting diodes; absorbing the excitation light at the phosphor layer and emitting fluorescent light according to the region in which the excitation light is absorbed; separately measuring intensities of the emitted red, green, and blue emissions with one or more detector assemblies; and adjusting the one or more excitation light sources based on the measured intensities in real time during a normal display mode of the display system.
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Specification