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Light engines with dynamically controllable light distribution

專利號
US10785847B2
公開日期
2020-09-22
申請人
Lumileds LLC(US CA San Jose)
發(fā)明人
Frederic Stephane Diana; Yifeng Qiu; Michael Wasilko; Nazila Soleimani; Jeroen Den Breejen; Alan Andrew McReynolds; Gregory Guth
IPC分類
H05B47/105; F21S4/20; F21V29/70; F21V23/04
技術領域
light,fixture,guide,may,in,leds,be,led,pan,or
地域: CA CA San Jose

摘要

An apparatus is disclosed comprising: a light guide having an opening formed thereon; an illumination source at least partially disposed in the opening, the illumination source including a plurality of LEDs disposed on a flexible circuit that is wrapped around a base, which may be thermally conductive, the base having a central opening, and the flexible circuit including a plurality of legs, each leg including electrical wiring for independently operating a different one of the LEDs, each leg being wrapped around a bottom edge of the base, and into the central opening, to come above the illumination source and connect to a control board that is situated above the illumination source; and a heat-dissipating element disposed over the illumination source, the heat-dissipating element being thermally coupled to the base to dissipate heat generated by the LEDs that is supplied to the heat dissipating element via the base.

說明書

FIG. 17 is a diagram of an example driver circuit 1700, in accordance with yet another possible electrical layout of the light fixtures disclosed herein. As illustrated, the driver circuit may include an AC/DC converter 1702 that is configured to provide constant current to the LED segments 106 and a DC/DC converter 1704. The DC/DC converter 1704 may be configured to reduce the voltage supplied by the AC/DC converter 1702 and feed the reduced voltage to the controller 330 and/or other components of the light fixtures disclosed herein. The controller 330 may be configured to receive user input, via any applicable input mechanism such as a wireless interface or an input device, and feed a dimming signal (DIM) to the AC/DC converter 1702 that is generated based on the user input. Based on the DIM, the AC/DC converter may change the value of the current output by the AC/DC converter 1702.

權利要求

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