LED Lighting

Rohm is claiming the smallest two-colour LED with the launch of the 1608 size (1.6 x 0.8mm) SML-D22MUW, intended for use behind seven-segment displays. “In recent years, chip LEDs are being increasingly used for numerical displays in industrial equipment and consumer devices,” said the firm. “Conventional numerical displays use a single colour to indicate numbers, but there is a growing ...

Predictable arrays of plasmonic nano-particles can be grown on the surface of LEDs to improve photon emission by localised surface plasmon resonances, according to the University of Michigan. “The idea of adding nano-particles to increase LED efficiency is not new, but previous efforts to incorporate them have been impractical for large-scale manufacturing,” said the University. “They focused on pricey metals ...

Plessey has extended  its LED product portfolio into a variety of mid-power LED packages and now offers lighting equipment manufacturers a complete and competitive portfolio of solid-state lighting products and solutions for all general illumination market applications. Plessey’s mid-power LED product offering, called Midion, includes products with efficacy up to 210 lm/W, said the firm, and up to 90 CRI. ...

A constant current LED dimmable driver from Euchips of China is DALI-standard and designed to be waterproof. The EUP50D-1H400C-0WP has an output power of 50W and the output current is 1400mA. The LED driver complies with DALI standard IEC62386, connects with DALI master controller and supports TouchDIM for smooth dimming. The waterproof level is IP65. The driver is designed and ...

Using what it calls the “most recent ultra-bright InGaN chip technology”, Vishay has announced green 0603 LEDs producing up to 2.8cd (or 2,800mcd as it puts it). The devices are 1.6 x 0.8mm and 0.55mm high and called VLMTG1400. Various 525nm outputs are available across 1.2-2.8cd at 20mA, dropping 2.75-3.2V. Viewing angle is 146°. Available in 8mm tape, the LEDs are RoHS-compliant, ...

ams has introduced a power management IC for LED-based lamps and luminaires which uses closed-loop sensing to maintain more accurate correlated colour temperature (CCT) and lumen output. Following the AS7221 smart lighting manager introduced earlier this year, this new device, the AS7220, combines a precise calibrated-for-life colour sensor with an intelligent Cognitive Lighting Engine for standalone closed-loop maintenance of  the output ...

A Bavarian consortium is developing aluminium nitride LEDs for disinfection – aiming for mass-production to replace mercury-containing lamps.

Roll-up glass is being developed for organic electronics. The bendable flexible material can be transferred directly from the melt to a roller for storage

Seoul Semiconductor has reference modules based on its package-free Wicop LEDs.

Plessey is introducing its first four-junction monolithic lighting LED, the nominally 12V 700mA PLW7070, stating that: the “component is 50% more cost-effective than any power LED solution” and that it “provides a 30% increase in light output when using any standard secondary optics”. Bold claims. Can the company justify them? Yes, according to Plessey product line manager Clive Beech and ...