Lighting device
View Patent ↗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.
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.
2. The lighting device according to claim 1 ,
wherein the refractive index of the layer is higher than or equal to a value which is 0.1 lower than the refractive index of the light-emitting region in the light-emitting body.
3. The lighting device according to claim 1 ,
wherein the refractive index of the layer is higher than or equal to the refractive index of the light-emitting region in the light-emitting body.
4. The lighting device according to claim 1 ,
wherein the refractive index of the layer is lower than or equal to a value which is 0.1 higher than the refractive index of the light-emitting region in the light-emitting body.
5. The lighting device according to claim 1 ,
wherein the second surface of the layer, which is on the light-emitting body side, is plane or substantially plane.
6. The lighting device according to claim 1 ,
wherein the light-emitting body is a plane light-emitting body which emits light utilizing organic electroluminescence.
7. The lighting device according to claim 1 ,
wherein the region with the negative Fresnel lens shape is larger than the light-emitting region.
8. A lighting device comprising:
a structure body including a negative Fresnel lens shape on a region of a first surface of the structure body, and including a concave-convex shape on a region of a second surface opposite to 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, and
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, the region of the second surface of the structure body, and the light-emitting region are in a concentric pattern.
9. The lighting device according to claim 8 ,
wherein the refractive index of the layer is higher than or equal to a value which is 0.1 lower than the refractive index of the light-emitting region in the light-emitting body.
10. The lighting device according to claim 8 ,
wherein the refractive index of the layer is higher than or equal to the refractive index of the light-emitting region in the light-emitting body.
11. The lighting device according to claim 8 ,
wherein the refractive index of the layer is lower than or equal to a value which is 0.1 higher than the refractive index of the light-emitting region in the light-emitting body.
12. The lighting device according to claim 8 ,
wherein the structure body includes a first member with the first surface including the region with the negative Fresnel lens shape and a second member with the second surface including the region with the concave-convex shape.
13. The lighting device according to claim 8 ,
wherein the structure body includes a first member with the first surface including the region with the negative Fresnel lens shape, a second member with the second surface including the region with the concave-convex shape, and a third member between the first member and the second member.
14. The lighting device according to claim 8 ,
wherein the second surface of the layer, which is on the light-emitting body side, is plane or substantially plane.
15. The lighting device according to claim 8 ,
wherein the region with the concave-convex shape is larger than the region with the negative Fresnel lens shape.
16. The lighting device according to claim 8 ,
wherein the concave-convex shape is a Fresnel lens shape.
17. The lighting device according to claim 8 ,
wherein the light-emitting body is a plane light-emitting body which emits light utilizing organic electroluminescence.
18. The lighting device according to claim 8 ,
wherein the region with the negative Fresnel lens shape is larger than the light-emitting region.
19. A lighting device comprising:
a structure body including:
a first negative Fresnel lens shape on a first region of a first surface of the structure body;
a second negative Fresnel lens shape on a second region of the first surface of the structure body; and
a concave-convex shape on a third region of a second surface opposite to 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;
a first light-emitting body which is over the first region of the structure body with the layer interposed therebetween; and
a second light-emitting body which is over the second region of the structure body with the layer interposed therebetween,
wherein the layer includes a first Fresnel lens shape at an interface with the first region of the first surface of the structure body, and a second Fresnel lens shape at an interface with the second region of the first surface of the structure body,
wherein each of the first light-emitting body and the second light-emitting body is in direct contact with the second surface of the layer,
wherein each of the first light-emitting body and the second light-emitting body comprises a first electrode, a second electrode, and a light-emitting layer interposed therebetween,
wherein the layer comprises a resin which is cured,
wherein the structure body and the layer are capable of transmitting light, and
wherein a refractive index of the layer and refractive indices of light-emitting regions in the first light-emitting body and the second light-emitting body are higher than a refractive index of the structure body by 0.1 or more, and
wherein the first region of the first surface of the structure body, the third region of the second surface of the structure body, and the light-emitting region in the first light-emitting body are in a concentric pattern.
20. The lighting device according to claim 19 ,
wherein the refractive index of the layer is higher than or equal to a value which is 0.1 lower than the refractive indices of the light-emitting regions in the first light-emitting body and the second light-emitting body.
21. The lighting device according to claim 19 ,
wherein the refractive index of the layer is higher than or equal to the refractive indices of the light-emitting regions in the first light-emitting body and the second light-emitting body.
22. The lighting device according to claim 19 ,
wherein the refractive index of the layer is lower than or equal to a value which is 0.1 higher than the refractive indices of the light-emitting regions in the first light-emitting body and the second light-emitting body.
23. The lighting device according to claim 19 ,
wherein the second surface of the layer, which is on the first light-emitting body side, is plane or substantially plane.
24. The lighting device according to claim 19 ,
wherein each of the first light-emitting body and the second light-emitting body is a plane light-emitting body which emits light utilizing organic electroluminescence.
25. The lighting device according to claim 1 , wherein the resin comprises bromine or sulfur.
26. The lighting device according to claim 1 , wherein the layer comprises an inorganic material film.
27. The lighting device according to claim 8 , wherein the resin comprises bromine or sulfur.
28. The lighting device according to claim 8 , wherein the layer comprises an inorganic material film.
29. The lighting device according to claim 19 , wherein the resin comprises bromine or sulfur.
30. The lighting device according to claim 19 , wherein the layer comprises an inorganic material film.