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US 10,520,660 B2Granted
Spatial multiplexing coupler for light guide plates
AssigneeCorning Incorporated
InventorsSergey Anatol'evich Kuchinsky, Shenping Li, Aramais Robert Zakharian
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Abstract
A light guide plate suitable for use in a liquid crystal display device, the light guide plate comprising a glass plate and a light coupler bonded to a edge surface of the light guide plate. Also disclosed is a backlight unit for a liquid crystal display device employing the light guide plate, and a display device employing the backlight unit.
Claims18
A backlight unit comprising:
- a glass light guide plate comprising a first major surface, a second major surface, and at least one edge surface having a thickness Th1;
- a light coupler having an input facet coupled to the light guide plate comprising an integer n number of waveguides bonded to portions of the edge surface, each waveguide having an output facet;
- and
- a light source positioned adjacent the input facet of the light coupler, the input facet having a thickness Th2;
- wherein one of the n waveguides includes a straight portion positioned between the input facet of the light coupler and the at least one edge surface of the glass light guide plate, and
- wherein the straight portion of said one of the n waveguides extends from the input facet of the light coupler to the at least one edge surface of the glass light guide plate.
3 more elements
A light coupler comprising:
- an input facet;
- and
- an integer n number of waveguides, each waveguide having an output facet, at least one of the n number of waveguides including a curvilinear portion between the input facet and the respective output facet, the curvilinear portion having an arc radius between 11.5 mm to 8 mm,
- wherein the at least one waveguide of the n number of waveguides including the curvilinear portion achieves a coupling efficiency of at least 90%.
1 more element
A light coupler comprising:
- an input facet;
- and
- an integer n number of waveguides, each waveguide having an output facet, at least one of the n number of waveguides including a curvilinear portion between the input facet and the respective output facet, the curvilinear portion having an arc radius between 11.5 mm to 8 mm,
- wherein the curvilinear portion of said at least one of the n number of waveguides comprises a first arc and a second arc, and
- wherein the first arc is a flat arc and the second arc is a non-flat arc.
2 more elements
Dependencies are inferred from the claim text.