CURVED THIN SEE-THROUGH LIGHTGUIDE WITH LARGE EYEBOX
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United States of America
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Issued Date -
Dec 26, 2024
app pub date -
Nov 4, 2022
filing date -
Nov 4, 2022
priority date (Note) -
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status (Latency Note)
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Abstract
A display system includes a microdisplay and a curved light-guide to direct and magnify light from the microdisplay to a user's eye. The display system includes an incoupler that is thicker than the curved lightguide to couple light from the microdisplay into the curved lightguide and an out-coupler tilted at an angle to receive two bounces of display light and couple the display light out of the curved lightguide, resulting in a large eyebox. In some embodiments, the curved lightguide includes a low-index coating on a world-side surface with a gap through which side image light escapes and a sunglass coating on a lens to absorb the side image light. The curved light-guide includes a half-wave plate (HWP) to flip an input polarization for a main image to an orthogonal polarization and a dielectric mirror to act as a weak analyzer to dim side images.
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