LED Lighting

Led Engin is claiming a flux density record  with a combination of red, green, blue and white die that deliver 3,800 lm from 25 die in a 6.2 x 6.2 mm square on a 12 x 12mm substrate. Power input is 80W, leading to the claim of a “new world record in both flux and power density for high power, ...

Plessey is to develop packaged LEDs for circadian-modulated LED lighting systems from Massachusetts firm Circadian ZircLight. Developments at Circadian, according to Plessey, build upon a growing body of research showing that exposure to light at night causes a disruption of brain neuroendocrine systems, including melatonin and cortisol rhythms. “We are developing a set of human-centric LED product solutions to provide ...

Osram Opto Semiconductors is unveiling a 2,000 lm prototype headlamp LED at next week’s ISAL 2015 automotive lighting symposium. Called Oslon Black Flat S, the five-die surface-mount device has better chips and improved thermal management compared with its predecessor. The linear arrangement, lens-less construction and anti-reflection package eases demands on associated optics when forming mandatory flat-topped glare-free beams, and 2,000 ...

Plessey is claiming narrow light emission angles direct from lighting LEDs using what it is calling ‘chip-scale optics’. According to the company, schemes to collimate monochromatic light at the LED level have been developed before but no-one has previously collimated white light at the LED level. “The technology was originally designed as an on-chip phosphor dam,” said Plessey’s CTO Dr Keith Strickland. ...

Lumileds has tackled colour fringing in LED lighting with a range of LEDs that with matched optical centres regardless of wavelength. The family of devices is called Luxeon C Colors, and is aimed at stage and television lighting, as well as architectural lighting. “We’ve solved the problems of beam halos and mismatched, un-mixed colour by designing our platform to offer multiple ...

ESCATEC has a solution to the challenge of effectively cooling high brightness LEDs. Its Heat Spreader approach solders the LEDs onto a copper substrate, which is up to ten times more effective at dissipating the heat generated by the LEDs than current solutions. The CoolRunning design means that LEDs with a power density of up to 10W per mm2 could ...

Plessey has been given £6.7m by the Regional Growth Fund (RGF) towards the expansion of its LED manufacturing facility in Plymouth. Solid state lighting forms a significant part of global efforts to reduce energy consumption and greenhouse gas emissions. According to a new market research report (1), the solid state lighting market size is projected to reach $22.2bn by 2020, ...

Plessey is retrofitting its Plymouth manufacturing facility with LEDs and lighting modules made on-site. It will replace fluorescent tubes and compact fluorescent bulbs in existing fixtures – approximately 2,700 fixtures replacing 4,200 fluorescent lamps – for which it has designed retrofit kits. “LED retrofit kits offer the facilities engineers and installation contractors a cost effective, quick and easy method to take ...

The introduction of LED street lighting has raised a new problem. How can the electronic drivers be protected from voltage peaks from lightning strikes. The problem with LED lighting modules is that they operate at lower voltage levels and could be damaged from overvoltage. According to LED supplier Osram, this danger has increased with the UN Climate Council identifying increasing levels ...

Today Plessey announced the release of its range of GaN-on-Si MaGIC LED die. The blue die, sometimes referred to as blue pump for their ability to pump phosphor to a white colour range, are the latest innovation in high brightness LED die designed for a wide range of medium to high power applications including general lighting, signage, commercial, residential and ...