High power white LEDs are replacing current lighting sources, not only for indoor usage, but
also for outdoor and harsher environmental applications. This calls for higher reliability with …

Serious silicone carbonization has been reported in mid-power white-light LEDs during
highly accelerated temperature and humidity stress test, although the junction temperature …

This study proposed an automatic LED defect detection system to investigate the defects of
LED chips. Such defects include fragment chips, scratch marks and remained gold on the …

Abstract Yttrium Aluminum Garnet transparent ceramics with different Gd 3+ concentrations
((Ce 0.001 Gd x Y 0.999-x) 3 Al 5 O 12) ceramics were prepared by the conventional solid …

This paper presents a light-emitting-diode (LED) model based on the four-parameter Taylor
series to describe the VI characteristic of the LED at different junction temperatures …

Purpose The purpose of this paper is to investigate the effect of different soldering
temperatures on the performance of chip-on-board (COB) light sources during vacuum …

Light-emitting diode (LED) and SSL products, including packages, arrays, and modules are
in the initial adoption stage, and there are many reliability and design challenges facing the …

Over the past decades Light-emitting Diode (LED) devices have not only entered but
occupied large segments of the general lighting market due to their flexible control features …

Applications of LEDs have increased significantly, and increasing outdoor applications are
observed. Some outdoor applications require high reliability as their failure can lead to …

Tato bakalářská práce se zabývá popisem principu vzniku světla v LED světelných zdrojích.
V textu nalezneme princip funkce LED, historii, možnosti regulace jasu, napájení a různé …