Light Guide Plate and Surface-Lighting Device
AssigneeKawasaki Jukogyo Kabushiki Kaisha
InventorsMorimasa KUGE, Takanori KRITOSHI, Osami OOGUSHI, Hideyuki TANAKA
Life of this patent
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Abstract
A light guide plate includes an incidence surface and an output surface. The incidence surface is an end surface on which light emitted from a light source is incident. The output surface is a surface from which incident light coming from the incidence surface is outputted, and is a plane orthogonal to a thickness direction. The incidence surface is at least partially curved toward the light source, when viewed in a cross-section cut along a plane parallel to both a thickness direction of the light guide plate and an arrangement direction in which the light source and the light guide plate are arranged.
Claims7
1-6. (canceled)
A light guide plate, comprising:
- an incidence surface that is an end surface on which light from a light source is incident;
- and
- an output surface that is a surface from which incident light coming from the incidence surface is outputted, the output surface being a plane orthogonal to a thickness direction,
- wherein the incidence surface is at least partially curved toward the light source, when viewed in a cross-section cut along a plane parallel to both a thickness direction of the light guide plate and an arrangement direction in which the light source and the light guide plate are arranged.
A surface-lighting device, comprising:
- a light guide plate including an incidence surface that is an end surface on which light from a light source is incident;
- and an output surface that is a surface from which incident light coming from the incidence surface is outputted, the output surface being a plane orthogonal to a thickness direction, wherein the incidence surface is at least partially curved toward the light source, when viewed in a cross-section cut along a plane parallel to both a thickness direction of the light guide plate and an arrangement direction in which the light source and the light guide plate are arranged;
- and
- a light source emitting light to the incidence surface of the light guide plate.
Dependencies are inferred from the claim text.