LED Lighting

Silanna UV will be showing its recently-introduced UVC LEDs at the International Conference on UV LED Technologies & Applications (ICULTA) in Berlin next week. Its ‘short period superlattice’ (SPSL) die structure has repeating layers of AlN and GaN, and is designed to overcome the limitations of earlier structures. “Old-fashioned AlGaN-based far UVC LEDs in general suffer from poor carrier injection, ...

Rohm has developed four and six channel automotive LED drivers for 5 – 10in+ backlights behind displays and instrument clusters. The parts (table below) include 20,000:1 PWM dimming and dc dimming in a way which “eliminates flickering when changing display brightness from low to high”, according to the company. Switching can be between 200kHz and 2.4MHz, and operation is over ...

Cree LED has introduced 5 x 5.2mm 6V LEDs (o.75mm thick) that can deliver up to 480 lm at 400mA (5,000 or 5,700K, 70CRI, 25°C). Called ‘J Series 5050C E Class’, they can be identified by part numbers of the form: JR5050Cxx-E-….. Maximum current is 1A, and light output increases almost linearly with current, but drops with temperature – 480 ...

Asahi Kasei claims a record for its Klaran single chip UVC LED which emits at 160 mW in the ideal germicidal range of 260-270 nm. The device will be used to accelerate the adoption of UVC LEDs and hasten the widespread replacement of low-pressure mercury lamps. While the new device will retain the Klaran 3.5 mm x 3.5 mm package ...

Infineon Technologies has introduced a first-look design tool for LCC power converters. “Power factor correction plus LCC resonant topology for constant current output has proven to offer outstanding efficiency combined with a large output voltage range in high-power LED lighting applications,” according to the company. The “topology is 5 to 6% more efficient than other commonly used two-stage topologies. However, ...

Winner ams-Osram for Oslon square batwing LED   The four Oslon square batwing LEDs are primary optics for lighting greenhouses, which can be more homogeneous and avoid luminaire hotspots. The radiation pattern reduces the fixtures within greenhouses for greater system efficiency. The judges deemed this to be “a clear, innovative step in lighting with real-world implications”, adding that it demonstrates ...

Omron has introduced 400V and 600V 110°C versions of its G3VM photo mos isolated electronic relay family, as well as a 40V 2Ω type in the 1.5 x 2.5 x 1.3mm 4pin VSON package. With G3VM-401xY2 and G3VM-601xY2 base numbers, the 400V (120mAdc, or peak ac, continuous) and 600V (90mA) devices have typical on-resistances of 22 and 45Ω respectively with ...

Nichia and Infineon have come up with an integrated micro-LED light engine for HD adaptive driving beam applications. “The new 16,384 pixel µPLS micro-Pixelated Light Solution is our latest addition to Nichia’s portfolio of high-class automotive lighting solutions,” says Nichia’s Yusuke Yamazaki, “it combines high-definition resolution with the industry’s highest light output, by providing four-times wider field-of-view with significantly higher ...

Trumpf has revealed two ultra-short pulsed lasers for electronics manufacturing. “Ultrashort pulsed lasers see frequent use in electronics manufacturing, where they serve to produce printed circuit boards, displays and the like,” according to the company. There are two versions, one at 100W and he other at 200W The 100W laser (left) becomes the most powerful model in the company’s ‘TruMicro ...

ROHM has created a range of five different coloured 0603 (1608 metric 1.6 x 0.8mm) LEDs, the CSL1901 series, optimised for 2mA operation. “In recent years, technological advancements have resulted in dramatically improved luminous efficiency”, according to the company. “At the same time, the market is demanding LEDs tailored to characteristics in the low current range.” It argues that LED ...