Realization of Microlens Array on Flat Encapsulant Layer for Enhancing Light Efficiency of COB-LEDs
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Photonics Technology Letters"
DOI: 10.1109/lpt.2020.3022794
Abstract: The conventional chip-on-board light-emitting diodes (COB-LEDs) with flat encapsulant layer present low light efficiency due to the total internal reflection (TIR) happens at the encapsulant-air interface. In this study, microlens array was realized on the… read more here.
Keywords: encapsulant layer; geometry; flat encapsulant; microlens array ... See more keywords
A Facile Approach to Fabricate Patterned Surfaces for Enhancing Light Efficiency of COB-LEDs
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Transactions on Electron Devices"
DOI: 10.1109/ted.2017.2734105
Abstract: Light efficiency of chip-on-board light-emitting diodes (COB-LEDs) is much lower than the single-chip packaging LEDs due to its flat phosphor layer, and hemispherical phosphor layer realization is a great challenge in COB-LEDs packaging due to… read more here.
Keywords: patterned surfaces; cob leds; phosphor layer; phosphor ... See more keywords
Effect of refractive index of packaging materials on the light extraction efficiency of COB-LEDs with millilens array.
Sign Up to like & getrecommendations! Published in 2021 at "Applied optics"
DOI: 10.1364/ao.410141
Abstract: Lens arrays are introduced to diminish the total internal reflection (TIR) that happens at chip-encapsulant and encapsulant-air interfaces of chip-on-board light-emitting diodes (COB-LEDs), so as to improve the light extraction efficiency (LEE) of the COB-LEDs.… read more here.
Keywords: extraction efficiency; light extraction; cob leds; refractive index ... See more keywords