US Pat. No. 10,798,802

DIMMABLE LIGHTING DEVICE

SIGNIFY HOLDINGS B.V., E...

1. A lighting device comprising:a light engine comprising at least one solid state lighting element;
a controller for controlling a dimming level of the light engine;
a wireless communication module communicatively coupled to the controller for receiving a wireless dimming instruction from a wireless controller;
a further communication module communicatively coupled to the controller for connecting to a wired communication channel and for receiving a further dimming instruction from a further controller wired to the further communication module through the wired communication channel;
a memory device, and
a timer for timing a duration of a disruption, wherein the controller is adapted to store a specified dimming level in the memory device when said timed duration does not exceed the disruption threshold and retain a previously stored specified dimming level when said timed duration exceeds the disruption threshold;
wherein the controller is adapted to independently control the dimming level of the light engine in response to the wireless dimming instruction and the further dimming instruction;
wherein the controller is adapted to enter a sleep mode in response to a sleep mode instruction, in said sleep mode, at least the wireless communication module disabled.

US Pat. No. 10,753,577

LIGHTING DEVICE

SIGNIFY HOLDINGS B.V., E...

1. A lighting device comprising at least one light source adapted to emit white light and ultraviolet light, a collimator adapted to collimate the white light, and a light exit window through which the collimated white light and the ultraviolet light may pass into the ambient, and, wherein the light exit window is spectrally selective to emit the collimated white light while spreading the ultraviolet light; wherein the light exit window is adapted to diffract the ultraviolet light while allowing the white light to pass without substantial diffraction.