Light Diffusing/Collecting Member and Surface Light Source Device Using the Same
First Claim
1. A light diffusing/collecting member that is configured to be arranged above a light source, the light diffusing/collecting member comprising:
- a diffusion layer having an index of refraction and configured to diffuse light, a low refractive layer having an index of refraction, and a light collecting layer having an index of refraction and configured to collect light, the low refractive layer located between the diffusion layer and the light collecting layer, and the diffusion layer configured to be nearest to the light source, wherein the low refractive layer is formed of a material having a refractive index lower than the refractive index of the diffusion layer and the refractive index of the light collecting layer.
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Accused Products
Abstract
A light diffusion/collecting member and a surface light source device can be provided with a simple configuration soas to achieve an easy assembly process and weight reduction. The surface light source device can include light sources arranged within the same plane, and a flat light diffusion/collecting member arranged above the light sources. The light diffusion/collecting member can be composed of a diffusion layer having a diffusion function, a low refractive layer, and a light collecting layer having a light collecting function. These layers can be integrally stacked in this order such that the diffusion layer is the nearest to the light sources. The low refractive layer can be made of a material with a lower refractive index than those of the materials composing the diffusion layer and the light collecting layer.
12 Citations
25 Claims
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1. A light diffusing/collecting member that is configured to be arranged above a light source, the light diffusing/collecting member comprising:
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a diffusion layer having an index of refraction and configured to diffuse light, a low refractive layer having an index of refraction, and a light collecting layer having an index of refraction and configured to collect light, the low refractive layer located between the diffusion layer and the light collecting layer, and the diffusion layer configured to be nearest to the light source, wherein the low refractive layer is formed of a material having a refractive index lower than the refractive index of the diffusion layer and the refractive index of the light collecting layer. - View Dependent Claims (2, 3, 4, 8, 9, 14, 16, 18, 20, 21, 24)
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5. A light diffusing/collecting member that is configured to be arranged above a light source, the light diffusing/collecting member comprising:
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a diffusion layer configured to diffuse light, a low refractive layer, and a light collecting layer configured to collect light, the low refractive layer located between the diffusion layer and the light collecting layer, and the diffusion layer configured to be positioned nearest to the light source, wherein the low refractive layer is configured by arranging the diffusion layer and the light collecting layer with a predetermined distance therebetween. - View Dependent Claims (6, 7, 10, 11, 12, 13, 15, 17, 19, 22, 23, 25)
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Specification