Patent ID: 11966070
Assignee: SIGNIFY HOLDING B.V.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G | IPC F

Claim 0:
1. A light guide for a lighting device, the light guide comprising:
an incoupling element configured for receiving light and coupling the received light into the light guide, wherein the light guide is configured to convey the received light within the light guide; and
at least a first group and a second group of conically shaped outcoupling surface structures distributed on, and recessed into or protruding from, a side of the light guide, wherein each conically shaped outcoupling surface structure is configured for coupling of light out of the light guide;
wherein each conically shaped outcoupling surface structure of the first group is geometrically shaped in accordance with a first cone or conical frustum and each conically shaped outcoupling surface structure of the second group is geometrically shaped in accordance with a second cone or conical frustum,
wherein the first cone or conical frustum has a height different from a height of the second cone or conical frustum,
wherein the first cone or conical frustum has a base diameter different from a base diameter of the second cone or conical frustum,
wherein the first cone or conical frustum has a height to base diameter ratio in a range of 0.4 to 0.7, and
wherein the second cone or conical frustum has a height to base diameter ratio in a range of 0.7 to 1.4.