LED thermal protection structures

摘要

The present disclosure discloses an apparatus for thermally protecting an LED device. The apparatus includes a substrate. A light-emitting device disposed on a first region of the substrate. The apparatus includes a thermistor disposed on a second region of the substrate. The second region is substantially spaced apart from the first region. The thermistor is thermally and electrically coupled to the light-emitting device. The present disclosure also discloses a method of thermally protecting an LED device. The method includes providing a substrate having a light-emitting diode (LED) die disposed thereon. The method includes detecting a temperature of the LED die using a negative temperature coefficient (NTC) thermistor. The NTC thermistor is positioned on a region of the substrate substantially away from the LED die. The method includes adjusting an electrical current of the LED die in response to the detecting.

主权项

1. An apparatus, comprising:
a substrate; a light-emitting device disposed on a first region of the substrate; and a temperature-dependent passive device disposed on a second region of the substrate, wherein the light-emitting device is placed away from the temperature-dependent passive device to minimize thermal interference on a temperature of the light-emitting device; wherein the temperature-dependent passive device is thermally and electrically coupled to the light-emitting device through a thermally conductive layer of the substrate so as to sense the temperature of the light-emitting device through the thermally conductive layer, and wherein a resistance of the temperature-dependent passive device decreases as temperature increases; and wherein the temperature-dependent passive device is electrically coupled to the light-emitting device in parallel, and a first terminal of the temperature-dependent passive device is tied to a first terminal of the light-emitting device, and a second terminal of the temperature-dependent passive device is tied to a second terminal of the light-emitting device.