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US 9,751,267 B2Granted
Optical element, light-emitting device, lighting device, and method for manufacturing optical element
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsKoichiro Tanaka, Katsuki Yanagawa
Life of this patent
Estimating the term…
Abstract
An optical element comprises an organic resin and bubbles distributed to have a number density increasing from a first plane of the optical element toward a second plane of the optical element, where a diameter of the bubbles is less than or equal to a wavelength of light which enters the optical element. At least one of the first plane and the second plane may have an uneven structure.
Claims46
A light-emitting device comprising:
- an organic EL element over a substrate;
- an optical element;
- a sealant configured to bond the substrate and the optical element;
- a terminal electrically connected to the organic EL element between the substrate and the sealant;
- and
- a filler to fill a space formed by the substrate, the optical element, and the sealant,
- wherein the optical element includes an organic resin and bubbles each having a diameter of greater than or equal to 10 nm and less than or equal to 10 μm,
- wherein the bubbles are distributed to have a number density increasing from a first plane of the optical element toward a second plane of the optical element so that a refractive index of the optical element decreases from the first plane toward the second plane,
- wherein the organic EL element is a planar light source,
- wherein at least one of the first plane and the second plane includes an uneven structure,
- wherein the uneven structure is a hemispherical structure, and
- wherein a refractive index of the hemispherical structure concentrically decreases from a center of a hemisphere toward an outside.
9 more elements
A light-emitting device comprising:
- an organic EL element over a substrate;
- an optical element;
- a sealant configured to bond the substrate and the optical element;
- a terminal electrically connected to the organic EL element between the substrate and the sealant;
- and
- a filler to fill a space formed by the substrate, the optical element, and the sealant,
- wherein the optical element includes a material and bubbles each having a diameter of greater than or equal to 10 nm and less than or equal to 10 μm,
- wherein the material is one of glass, indium oxide, indium tin oxide, indium zinc oxide, zinc oxide, zinc oxide to which gallium is added, and graphene,
- wherein the bubbles are distributed to have a number density increasing from a first plane of the optical element toward a second plane of the optical element so that a refractive index of the optical element decreases from the first plane toward the second plane,
- wherein the organic EL element is a planar light source,
- wherein at least one of the first plane and the second plane includes an uneven structure,
- wherein the uneven structure is a hemispherical structure, and
- wherein a refractive index of the hemispherical structure concentrically decreases from a center of a hemisphere toward an outside.
10 more elements
A light-emitting device comprising:
- an optical element;
- an organic EL element over the optical element;
- a substrate;
- a sealant configured to bond the substrate and the optical element;
- a terminal electrically connected to the organic EL element between the optical element and the sealant;
- and
- a filler to fill a space formed by the substrate, the optical element, and the sealant,
- wherein the optical element includes an organic resin and bubbles each having a diameter of greater than or equal to 10 nm and less than or equal to 10 μm,
- wherein the bubbles are distributed to have a number density increasing from a first plane of the optical element toward a second plane of the optical element so that a refractive index of the optical element decreases from the first plane toward the second plane,
- wherein the organic EL element is a planar light source,
- wherein at least one of the first plane and the second plane includes an uneven structure,
- wherein the uneven structure is a hemispherical structure, and
- wherein a refractive index of the hemispherical structure concentrically decreases from a center of a hemisphere toward an outside.
10 more elements
A light-emitting device comprising:
- an optical element;
- an organic EL element over the optical element;
- a substrate;
- a sealant configured to bond the substrate and the optical element;
- a terminal electrically connected to the organic EL element between the optical element and the sealant;
- and
- a filler to fill a space formed by the substrate, the optical element, and the sealant,
- wherein the optical element includes a material and bubbles each having a diameter of greater than or equal to 10 nm and less than or equal to 10 μm,
- wherein the material is one of glass, indium oxide, indium tin oxide, indium zinc oxide, zinc oxide, zinc oxide to which gallium is added, and graphene,
- wherein the bubbles are distributed to have a number density increasing from a first plane of the optical element toward a second plane of the optical element so that a refractive index of the optical element decreases from the first plane toward the second plane,
- wherein the organic EL element is a planar light source,
- wherein at least one of the first plane and the second plane includes an uneven structure,
- wherein the uneven structure is a hemispherical structure, and
- wherein a refractive index of the hemispherical structure concentrically decreases from a center of a hemisphere toward an outside.
11 more elements
Dependencies are inferred from the claim text.