Lighting apparatus with heat transfer and light guiding structure

摘要

A lighting apparatus, comprising: a light source that emits light; a hollow heat-transfer member including an outer surface on which the light source is disposed; and a light guiding member that covers the light source and at least part of the outer surface along the outer surface.

主权项

1. A lighting apparatus, comprising:
at least one light source that emits light; a heat-transfer member including an outer surface on which the at least one light source is disposed, the heat-transfer member forming a hollow space; a light guiding member that contacts along the outer surface of the heat-transfer member and covers the at least one light source and at least part of the outer surface of the heat-transfer member; and a reflection member that is provided in contact with an outer surface of the light guiding member and to be opposed to the at least one light source via the light guiding member, wherein the at least one light source is provided at an end of the heat-transfer member in a direction of a center axis of the lighting apparatus substantially and is interposed between the heat-transfer member and the light guiding member, part of the light emitted by the at least one light source is reflected totally at an interface between the light guiding member and an outside and inside of the light guiding member and propagates to an interior of the light guiding member, and both the heat-transfer member and the light guiding member surround the hollow space, part of an outer surface of the light guiding member facing the at least one light source having another curved surface which is different from a curve of the peripheral part of the outer surface of the light guiding member and which reflects light emitted from the at least one light source toward an extending direction of the light guiding member, the reflecting member having another curved surface which faces the at least one light source and reflects light emitted from the at least one light source toward an extending direction of the light guiding member, and the curved surface of the light guiding member and the other curved surface of the reflecting member contact along the extending direction of the light guiding member with each other.