US Patent No. 10,485,066

LAMP WITH VARIABLE-BEAM OUTPUT BY DISCRETELY ACTIVATING LED LIGHT SOURCES


Patent No. 10,485,066
Issue Date November 19, 2019
Title Lamp With Variable-beam Output By Discretely Activating Led Light Sources
Inventorship Anthony W. Catalano, Boulder, CO (US)
Assignee LEDVANCE LLC, Wilmington, MA (US)

Claim of US Patent No. 10,485,066

1. A light source producing a beam of variable divergence, comprising:a plurality of light-emitting devices arranged on a plane that includes a first set of light emitting devices positioned around a second set of light emitting devices;
a concave reflecting optic having an axis of symmetry traveling through the second set of light emitting diodes, and comprising a plurality of segments for reflecting at least a portion of light emitted by the light-emitting devices and reflected by the optic forming a light beam, the segments having an aiming angle which increases gradually with increasing distance from the plane of the plurality of light emitting devices for increasing light divergence of the light beam; and
driver circuitry for controlling drive currents to the light-emitting devices such that a maximum divergence of the light beam is produced by said driver circuitry powering outermost light emitting devices of the first set of light emitting devices, and a gradually decreasing divergence of the light beam is produced by said driver circuitry decreasing a number of powered outermost light emitting devices of the first set of light emitting devices while selectively powering a combination of the inner light emitting devices of the first set of light emitting devices and the second set of light emitting devices.