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US 7,826,698 B1Granted
Elimination of stitch artifacts in a planar illumination area
AssigneeOree, Inc.
InventorsNoam Meir, Micha Zimmermann, Yosi Shani
Life of this patent
Estimating the term…
Abstract
In one aspect, a planar illumination area includes two light-guide elements, each with an out-coupling region. At least a portion of each out-coupling region overlaps with at least a portion of the other. The overlapping region emits a substantially uniform light output power.
Claims19
A planar illumination area substantially free of stitch artifacts, comprising:
- a first discrete light-guide element comprising (i) first and second non-parallel sidewalls spanning top and bottom surfaces, the first sidewall being reflective, and (ii) an out-coupling region partially bounded by the sidewalls;
- a second discrete light-guide element comprising (i) first and second non-parallel sidewalls spanning top and bottom surfaces, the first sidewall being reflective, and (ii) an out-coupling region partially bounded by the sidewalls, the first sidewall of the second light-guide element being adjacent and opposed to the first sidewall of the first light-guide element;
- and
- a third discrete light-guide element comprising an out-coupling region, at least a portion of the out-coupling region of the third light-guide element overlapping at least a portion of the out-coupling region of the first light-guide element, including the second sidewall thereof, to define an overlapping region having an area,
- wherein (i) light in the first light-guide element striking its first sidewall substantially reflects therefrom rather than travelling into the second light-guide element, (ii) light in the second light-guide element striking its first sidewall substantially reflects therefrom rather than travelling into the first light-guide element, and (iii) the overlapping region emits a substantially uniform light output over the area.
2 more elements
A planar illumination area substantially free of stitch artifacts, comprising:
- a first discrete light-guide element comprising (i) first and second non-parallel sidewalls spanning top and bottom surfaces, the first sidewall being polished, and (ii) an out-coupling region partially bounded by the sidewalls;
- a second discrete light-guide element comprising (i) first and second non-parallel sidewalls spanning top and bottom surfaces, the first sidewall being polished, and (ii) an out-coupling region partially bounded by the sidewalls, the first sidewall of the second light-guide element being adjacent to the first sidewall of the first light-guide element without overlap therebetween;
- and
- a third discrete light-guide element comprising an out-coupling region, at least a portion of the out-coupling region of the third light-guide element overlapping at least a portion of the out-coupling region of the first light-guide element, including the second sidewall thereof, to define an overlapping region having an area,
- wherein (i) light in the first light-guide element striking its first sidewall refracts and travels into the second light-guide element through its first sidewall, and (ii) the overlapping region emits a substantially uniform light output over the area.
2 more elements
Dependencies are inferred from the claim text.