Lighting device

摘要

A lighting device is provided with a structure body which has an inner surface including a region with a negative Fresnel lens shape and a high refractive index material layer which is closely in contact with the inner surface. The high refractive index material layer has a Fresnel lens shape in a region closely in contact with the inner surface, and a plane light-emitting body is provided over the structure body with the high refractive index material layer interposed therebetween. The high refractive index material layer is provided so as to fill at least the negative Fresnel lens shape of the structure body and thus has a surface including the region with the Fresnel lens shape at the interface with the structure body.

主权项

1. A lighting device comprising:
a structure body including a first surface and a second surface which is opposite to the first surface of the structure body, the structure body including a negative Fresnel lens shape on a region of the first surface of the structure body; a layer including a first surface and a second surface which is opposite to the first surface of the layer, the first surface of the layer being in direct contact with the first surface of the structure body; and a light-emitting body which is over the structure body with the layer interposed therebetween, the light-emitting body being in direct contact with the second surface of the layer, wherein the light-emitting body comprises a first electrode, a second electrode, and a light-emitting layer interposed therebetween, wherein the layer includes a Fresnel lens shape at an interface with the region of the first surface of the structure body, wherein the layer comprises a resin which is cured, wherein the structure body and the layer are capable of transmitting light, wherein a refractive index of the layer and a refractive index of a light-emitting region in the light-emitting body are higher than a refractive index of the structure body by 0.1 or more, and wherein the region of the first surface of the structure body and the light-emitting region are in a concentric pattern.