Heat and fluid flow in high-power LED packaging and applications
Light-emitting diodes (LEDs) are widely used in our daily lives. Both light and heat are
generated from LED chips and then transmitted or conducted through multiple packaging …
generated from LED chips and then transmitted or conducted through multiple packaging …
Measurement and numerical studies of optical properties of YAG: Ce phosphor for white light-emitting diode packaging
The optical properties of YAG: Ce phosphor were measured by a double-integrating-sphere
system and calculated by Mie theory and Monte Carlo ray tracing to provide precise optical …
system and calculated by Mie theory and Monte Carlo ray tracing to provide precise optical …
Optical analysis of color distribution in white LEDs with various packaging methods
Uniform color distribution is essential for the packaging of light emitting diodes (LEDs). The
Monte Carlo ray tracing method is applied to analyze the color distribution of white LEDs …
Monte Carlo ray tracing method is applied to analyze the color distribution of white LEDs …
Design of a novel freeform lens for LED uniform illumination and conformal phosphor coating
A conformal phosphor coating can realize a phosphor layer with uniform thickness, which
could enhance the angular color uniformity (ACU) of light-emitting diode (LED) packaging. In …
could enhance the angular color uniformity (ACU) of light-emitting diode (LED) packaging. In …
Effect of phosphor settling on the optical performance of phosphor-converted white light-emitting diode
Phosphor settling phenomena exists during the phosphor coating process in the light
emitting diode (LED) packaging industry. It is perceived that phosphor settling will affect the …
emitting diode (LED) packaging industry. It is perceived that phosphor settling will affect the …
Study on the optical properties of conformal coating light-emitting diode by Monte Carlo simulation
The light extraction efficiency (LEE), correlated color temperature (CCT), and angular color
uniformity (ACU) of the conformal coating phosphor silicone gel were investigated by Monte …
uniformity (ACU) of the conformal coating phosphor silicone gel were investigated by Monte …
A detailed study on the requirements for angular homogeneity of phosphor converted high power white LED light sources
C Sommer, P Hartmann, P Pachler, M Schweighart… - Optical Materials, 2009 - Elsevier
We present a simulation procedure based on optical ray-tracing in order to optimize the
angular homogeneity of the light emitted from the color conversion element (CCE) in a …
angular homogeneity of the light emitted from the color conversion element (CCE) in a …
Packaging efficiency in phosphor-converted white LEDs and its impact to the limit of luminous efficacy
In this paper, we start from the study on the packaging efficiency of the phosphor-converted
white LED via a new way to measure and calculate the blue light from the blue die to the …
white LED via a new way to measure and calculate the blue light from the blue die to the …
Angular color uniformity enhancement of white light-emitting diodes integrated with freeform lenses
We demonstrate a freeform lens to enhance the angular color uniformity (ACU) of white light-
emitting diodes (LEDs) whose phosphor layers were coated by freely dispersed coating …
emitting diodes (LEDs) whose phosphor layers were coated by freely dispersed coating …
Studies on optical consistency of white LEDs affected by phosphor thickness and concentration using optical simulation
Effects of variations of yttrium aluminum garnet: Ce phosphor thickness and concentration
on optical consistency of produced white light-emitting diodes (LEDs) including the …
on optical consistency of produced white light-emitting diodes (LEDs) including the …