Internal and external lighting equipment
is, LED auto lamp devices and incandescent devices, thermal design are
very different. This is because the incandescent lamp will produce
considerable heat, but incandescent bulbs can withstand such a high
temperature environment. However, for LED, its release from the PN
interface photon energy band beating, showing a negative correlation
with temperature, the temperature the higher the light output is
weaker, so cooling a LED as the light source design an important issue.
LED lamp array of heat generated by incandescent lamps in general less
than that, but the maximum internal temperature of LED lights must be
kept within the recommended upper limit in order to maintain LED
reliability, and if exceeding the maximum junction temperature of LED
lights, it may be due to epoxy materials, which led to the expansion of
wire binder or event of a sudden elevation of the LED die failure.
Relatively high humidity, the heat in the loop or enhance thermal loop
environment, these failures are particularly prominent. LED lights
maximum internal junction temperature epoxy encapsulation material is
subject to the thermal expansion characteristics. Compared to
incandescent lights with the vehicle design, because of restrictions on
the maximum junction temperature, LED automotive lights must be
designed to give serious consideration to thermal design problems.
|
