Light guide plate, lighting illuminating device using same, area light source and display
First Claim
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1. A light guide plate comprising:
- a first light guide layer on which light from a light source is incident, made of a material having a refractive index n1; and
a scattering light guide layer for emitting light as scattering light, the first light guide layer and the scattering light guide layer being stacked on each other, wherein;
the scattering light guide layer includes (i) a second light guide layer made of a material having a refractive index n2 lower than the refractive index n1, adjacent to the first light guide layer, and (ii) a scattering layer for scattering light propagating to the second light guide layer, the first light guide layer includes, on an end surface opposite to a light guide surface on which the light is incident, reflection means which changes an angle of light propagating in the first light guide layer and reaching the end surface, so that the light is incident on the scattering light guide layer, and the first light guide layer causes total reflection of light, incident on the first light guide layer from the light source, at (i) a surface on which the scattering light guide layer is formed and (ii) a rear surface.
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Abstract
A light guide plate includes (i) a first light guide layer made of a material having a refractive index n1, and (ii) a scattering light guide layer having a function of scattering light. A reflection means for irradiating the scattering light guide layer with the light having propagated in the first light guide layer is provided on a surface opposite to a light guide surface of the first light guide layer, the light guide surface on which the light is incident. The scattering light guide layer includes at least (i) a second light guide layer made of a material having a refractive index n2 (n2<n1), and (ii) a scattering layer for scattering the light propagating in the second light guide layer.
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18 Claims
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1. A light guide plate comprising:
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a first light guide layer on which light from a light source is incident, made of a material having a refractive index n1; and
a scattering light guide layer for emitting light as scattering light, the first light guide layer and the scattering light guide layer being stacked on each other, wherein;
the scattering light guide layer includes (i) a second light guide layer made of a material having a refractive index n2 lower than the refractive index n1, adjacent to the first light guide layer, and (ii) a scattering layer for scattering light propagating to the second light guide layer, the first light guide layer includes, on an end surface opposite to a light guide surface on which the light is incident, reflection means which changes an angle of light propagating in the first light guide layer and reaching the end surface, so that the light is incident on the scattering light guide layer, and the first light guide layer causes total reflection of light, incident on the first light guide layer from the light source, at (i) a surface on which the scattering light guide layer is formed and (ii) a rear surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification