Patterned structure of REMOTE PHOSPHOR for phosphor-converted white LEDs
نویسندگان
چکیده
منابع مشابه
Patterned structure of remote phosphor for phosphor-converted white LEDs.
High efficiency white light-emitting diodes with superior color-mixing have been investigated. It is suggested that the patterned remote phosphor structure could improve the uniformity of angular-dependent correlated color temperature (CCT) and achieve high chromatic stability in wider operating current range, as compared to the conventional remote phosphor coating structure. In this experiment...
متن کاملRed (SrCa)AlSiN3: Eu Nitride Phosphor Particle Size of Phosphor Converted Warm White LEDs
Red (SrCa)AlSiN3: Eu nitride phosphor with different particle sizes were characterized based on physical and luminescent properties, then packaged into Chip-On-Board (COB) Warm White Light Emitting Diode (LED) modules to investigate the influence of particle size on packaging parameters and optical output of the COB LED devices. The phosphor particle sizes investigated were 10μm, 12μm and 14μm,...
متن کاملPhosphor converted LEDs with omni-directional-reflector coating.
A packaging scheme utilizing omni-directional reflective (ODR) optical coating is described to enhance the light extraction of near UV excited, phosphor-converted LEDs. A simple 1D model was developed to analyze the spectra of the extracted light measured with an integration-sphere as a function of phosphor layer concentration and thickness. Quantitative determination of the absorption coeffici...
متن کاملA non-contact method for determining junction temperature of phosphor- converted white LEDs
The goal of this study was to develop a non-contact method for determining the junction temperature of phosphorconverted white LEDs as a first step toward determining the useful life of systems using white LEDs. System manufacturers generally quote the same life values for their lighting systems that the LED manufacturers estimate for a single LED. However, the life of an LED system can be much...
متن کاملThe Mixed Blessing of Phosphor-Based White LEDs
Light-emitting diodes (LEDs), which use less energy and last longer than even compact fluorescent lights, 1 are predicted to become the leading lighting technology in the United States as incandescent bulbs are phased out. 2 But Abraham Haim, director of the Israeli Center for Interdisciplinary Studies in Chronobiology, will not bring white LEDs and other so-called short-wavelength lights into ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Optics Express
سال: 2011
ISSN: 1094-4087
DOI: 10.1364/oe.19.00a930