Light Emitting Module Electrode Layout for Uniform LED Current

The patent applies local quality by creating a non-uniform electrode structure where the p-type electrode pad has different geometrical characteristics in different regions. Specifically, the electrode pad width varies across the large-area LED chip, with narrower regions where higher current density is needed and wider regions where lower current density suffices. This local variation in electrode geometry optimizes current distribution uniformity across the entire large-area structure, resolving the contradiction between achieving high luminous intensity and maintaining uniform current distribution.

The patent applies parameter changes by systematically varying the p-type electrode pad geometry parameters (width, length, position) to simultaneously optimize multiple performance parameters. By adjusting these geometrical parameters, the design achieves a balance where sufficient light extraction efficiency is maintained (reducing optical loss) while heat dissipation pathways are optimized through strategic electrode placement and dimensioning, thus resolving the contradiction between optical performance and thermal management.