Beyond the Limitations of Today's LED Packages: Optimizing High Brightness LED Performance by a Comprehensive Systems Design Approach

摘要

Critical requirements including high brightness, high color rendering, and high wall plug efficiency for the most demanding LED applications such as surgical illumination and industrial and dental sealant curing are difficult to meet with the limitations posed by commercially available LED packages. The importance of optimizing an illumination system from the system-level perspective is presented. It is necessary to integrate efficient die, electrical drive conditions, heat dissipation, LED out-coupling optics and auxiliary optics. It is not sufficient to collect the maximum amount of light from an LED package; the light must be captured into a minimum aperture while maintaining maximal brightness. Commercially available LED packages, including the recently available 1 and 5 Watt emitters, suffer by varying degrees, in their applicability to today's most demanding applications. An optimized LED package is described that outperforms commercially available packages. Specific medical, commercial and industrial LED applications are described that can meet many of the most demanding requirements with today's technology.