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US 11,231,547 B2Granted
Slim waveguide coupling apparatus and method
AssigneeOree Advanced Illumination Solutions Ltd.
InventorsYosi Shani, Tania Kosburd, Dafna Bortman Arbiv
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Abstract
In various embodiments, an illumination structure includes a discrete light source disposed proximate a bottom surface of a waveguide and below a depression in a top surface thereof. A top mirror may be disposed above the discrete light source to convert modes of light emitted from the discrete light source into trapped modes, thereby increasing the coupling efficiency of the illumination structure.
Claims19
An illumination device comprising:
- a waveguide having (i) top and bottom opposed surfaces, (ii) an in-coupling region for receiving light, (iii) an out-coupling region for emitting light from the waveguide, (iv) a depression defined in the top surface thereof, and (v) a recess defined in the bottom surface thereof;
- one or more discrete light sources disposed at least partially within the recess and positioned to emit light into the in-coupling region;
- an index-matching material disposed around the one or more discrete light sources within the recess;
- and
- a reflector disposed over the depression.
2 more elements
Dependencies are inferred from the claim text.