Optical engine for head-mounted display apparatus
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United States of America Patent
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Feb 28, 2023
Grant Date -
Jun 10, 2021
app pub date -
Nov 23, 2020
filing date -
Dec 5, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
A display apparatus has a display to emit image-bearing light to a prism assembly that defines an optical path between an incident surface of the prism assembly and an output surface that is orthogonal to within +/−30 degrees relative to the incident surface, wherein the prism assembly has a curved reflective surface opposite the incident surface. The prism assembly encases a beam splitter at an oblique angle to the defined optical path and to both the incident and the output surface of the prism assembly. A shim, in contact against the display surface and against the incident surface of the prism assembly, defines a sealed air gap for light between the display surface and the incident surface. A frame houses the display, the shim, and the incident surface of the prism assembly, wherein the frame further provides connection features for coupling the apparatus to a head-worn article.
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