An Analytical Model for Describing LED Pad Temperature in Backlight Unit

摘要

An Equivalent Thermal Resistance, ETR, is introduced in this paper to predict LED (light emitting diode) pad temperature while same thermal management is applying. A simplified experiment is conducted to find the behavior of ETR as different heat sink size is applied. Analytical solution, a power function, shows great match with the experiment data. Both 1-D & 2-D models (heat sink length & width) are introduced in this paper. A 37inch LCD (liquid crystal display) module with single vertical edge-lit LED BLU (backlight unit) is used for examination.