Aircraft LED Light Unit Thermal Management

The patent applies local quality by varying the thermal transfer member characteristics (size, material, geometry) at different locations on the PCB. Specifically, LEDs closer to the power supply are equipped with larger or more efficient thermal transfer members to compensate for the additional heat exposure, while LEDs farther away use smaller thermal transfer members. This localized differentiation ensures uniform operating temperatures and consistent light output across all LEDs throughout their operational lifetime.

The patent implements local quality by making thermal transfer members location-dependent. The thermal transfer members are designed with varying dimensions, materials, or geometries based on their position relative to the power supply. For example, thermal transfer members near the power supply may be larger in area or made of materials with higher thermal conductivity to compensate for the heat radiated by the power supply, ensuring all LEDs reach similar operating temperatures and exhibit uniform aging characteristics.

The patent applies parameter changes by systematically varying key parameters of the thermal transfer members (such as surface area, thickness, material composition, or geometric shape) based on the LED's position on the PCB. This controlled parameter variation allows compensation for temperature gradients while maintaining a relatively simple overall structure. The changes are calculated and designed during the manufacturing process rather than requiring complex active control systems, thus achieving temperature uniformity without excessive device complexity.