LED Chip Arrays with Non-Uniform Phosphor Distribution

The patent applies local quality by creating a non-uniform distribution of wavelength conversion materials (phosphors) with varying concentrations in different regions. This non-uniform phosphor distribution allows different local areas to have optimized thermal and optical properties, enabling high luminous flux density while managing localized heating through region-specific phosphor concentrations that convert light and dissipate heat more effectively in high-density LED arrays

The patent applies parameter changes by modifying the concentration and distribution parameters of wavelength conversion materials. By varying phosphor concentration across different regions rather than using a uniform distribution, the device can operate at high power levels with improved thermal management. This parameter optimization allows high lumen density while preventing thermal degradation and encapsulant cracking that would otherwise occur at high power

The patent resolves this contradiction by implementing local quality through non-uniform phosphor distribution. While this increases manufacturing complexity compared to uniform distribution, it provides superior thermal management and prevents encapsulant cracking. The localized variation in phosphor concentration allows different regions to be optimized for both manufacturing considerations and thermal performance, achieving a balance between ease of manufacture and heat dissipation capability