PDF Publication Title:
Text from PDF Page: 126
90 Handbook on the Physics and Chemistry of Rare Earths FIG. 80 Outer electrode InGaN LED chip Gold wire Inner electrode Dam Encapsulant (including phosphor) Substrate Schematic view of a typical chip-on-board (COB) type LED. White light Remote phosphor Reflector Blue-emitting LED package FIG. 81 Cross-sectional view of a typical remote phosphor type LED module. Blue light dissipation of the device because the LED chips contact directly to the sub- strate and the thermal resistance is reduced by omitting the package of SMD. 6.4 Remote Phosphor The “Remote phosphor” concept is a LED packaging technology in which phosphors are applied or mixed in glass or resin and the latter is positioned away from the blue-LED chip (Dal Lago et al., 2012). A typical structure of the remote phosphor type LED module is shown in Fig. 81. Kim et al. (2005c) reported the improvement of conversion efficiency of blue-LED light to yellow light by a remote phosphor. They compared the light output of a phosphor-converted InGaN LED with different configurations of the YAG:Ce3+ phosphor. The light output of the remote configuration in which the phosphor-containing resin was laid over a layer of encapsulant without phosphor was larger than that of conventional configuration with a single phosphor-containing encapsulant. Their comparisons both by experi- ment and ray-tracing simulation revealed that the light output of the remote configuration is $15% larger than that of conventional configuration. Yu et al. (2010) also claimed from ray-tracing simulation that the light output of LEDs with a phosphor layer away from the LED chip is higher than thatPDF Image | HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS
PDF Search Title:
HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHSOriginal File Name Searched:
Chemistry-Rare-Earths-49.pdfDIY PDF Search: Google It | Yahoo | Bing
Sulfur Deposition on Carbon Nanofibers using Supercritical CO2 Sulfur Deposition on Carbon Nanofibers using Supercritical CO2. Gamma sulfur also known as mother of pearl sulfur and nacreous sulfur... More Info
CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |