Patent ID: 9632240
Date: 2017-04-25
CPC Classifications: B60Q,F21S,F21Y,G02B

Claim:
1. A lighting apparatus comprising: a light guide having a ring-like shape and including a light entry face and a light exit face each having a ring-like shape; and a plurality of light-emitting devices arranged in a ring at predetermined intervals, at positions opposite the light entry face, wherein the light guide includes a plurality of collimating portions that collimate light emitted from the plurality of light-emitting devices, each of the plurality of collimating portions includes a light-refracting face and a plurality of light-reflecting faces, that collimate, in a direction of an optical axis of the collimating portion, light emitted obliquely with respect to the optical axis, from a corresponding one of the plurality of light-emitting devices, the light-refracting face is disposed opposite the corresponding one of the plurality of light-emitting devices, and collimates the light emitted from the corresponding one of the plurality of light-emitting devices by refracting the light, the plurality of light-reflecting faces receive the light emitted from the corresponding one of the plurality of light-emitting devices that is not received by the light-refracting face, and include: a distance from the optical axis to an optical axis-side end portion of at least one of the outer reflecting face, the inner reflecting face, and the lateral reflecting face is less than a distance from the optical axis to an optical axis-side end portion of the large radius reflecting face.