simulate the led heating

The led heating has long been a problem.the temperature changing regularity of led was studied during run time by mathematical simulation (monitor their heating process during processing).an apparent mthematics algorithmic method was used to simulate the temperature change.

first measured calculating equivalent parameters of led on run time.
*A simple proportional index is established between the intput voltage and temperature(K).
*temperature time constant T
*thermal hysteresis timer

you can write heaters of mathematical model After measurement.
set up mathematical model by which simulate the heating process.