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US 12,681,304 B2Granted
Waveguide structure and display device using the same
AssigneeVisEra Technologies Company Limited
InventorsPo-Han Fu, Hsin-Yi Hsieh, Wei-Ko Wang
Life of this patent
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Abstract
A waveguide structure is provided. The waveguide structure includes waveguide combiners stacked one upon the other. Each waveguide combiner includes a waveguide plate and an input coupler disposed on the waveguide plate. The input coupler of at least one waveguide combiner includes first grating pillars, and each first grating pillar has a gradually changing refractive index.
Claims20
A waveguide structure, comprising:
- waveguide combiners stacked one upon the other, wherein each of the waveguide combiners comprises:
- a waveguide plate;
- and
- an input coupler disposed on the waveguide plate;
- wherein the input coupler of at least one of the waveguide combiners comprises first grating pillars, each of the first grating pillars has a plurality of stacked layers, a lower stacked layer of the plurality of stacked layers includes at least one upper surface exposed from an upper stacked layer of the plurality of stacked layers, and each of the first grating pillars has a gradually increasing refractive index from a topmost layer to a bottommost layer of the plurality of stacked layers.
2 more elements
A display device, comprising:
- an image source;
- and
- a waveguide structure configured to couple lights from the image source, wherein the waveguide structure comprises:
- waveguide combiners stacked one upon the other, wherein each of the waveguide combiners comprises:
- a waveguide plate;
- and
- an input coupler disposed on the waveguide plate;
- wherein the input coupler of at least one of the waveguide combiners comprises first grating pillars, each of the first grating pillars has a plurality of stacked layers, a lower stacked layer of the plurality of stacked layers includes at least one upper surface exposed from an upper stacked layer of the plurality of stacked layers, and each of the first grating pillars has a gradually increasing refractive index from a topmost layer to a bottommost layer of the plurality of stacked layers.
5 more elements
Dependencies are inferred from the claim text.