Osram reports 155 lm and 136 lm/W from R&D LED 21 Jul 08
Osram is claiming a record for luminous flux and efficacy from an LED driven at 350 mA. |
Cree demos multichip XLamp MC-E 03 Jun 08
Cree has quadrupled the output of its XLamp devices with a new family of multichip devices in the same package size. |
TECH NOTES: Design solutions for solid-state lighting applications 12 Mar 08
Andreas Pohl of Avago Technologies describes some of the difficulties that designers may experience when designing LEDs into their lighting applications, focusing on thermal, optical and driver issues. |
Thermal design considerations for high-power single-chip LEDs 27 Feb 08
With advanced high-power packaging technology, large-area chips offer a number of advantages over arrays, according to Bob Karlicek, John Graff and Dave Sciabica. |
Seoul LED delivers 900 lm maximum at 10 watts 26 Feb 08
The new Z-Power P7 Series single LED package has significantly higher light output than a 60 W incandescent lamp. |
Lumileds ditches rogue epoxy, restarts production 07 Feb 08
After halting production of Luxeon Rebel and K2 LEDs containing TFFC die, Lumileds has pointed the finger at contaminated epoxy. |
Lumileds recalls some Luxeons, halts production line 22 Jan 08
Certain Luxeon LEDs have been recalled by Lumileds after a problem was discovered with epoxy used in packaging. Production is on hold until the problem is resolved. |
Interview: George Craford of Philips Lumileds
Lighting 06 Dec 07
By addressing issues such as efficacy droop at high drive
currents, Lumileds is planning to continue increasing the performance of power LEDs to 150 lm/W at 2A – and beyond. Tim Whitaker reports. |
Sharp unveils multi-chip LED lighting modules 04 Dec 07
A matrix of 30 LED chips acts as the light source is a series of modules with output of up to 280 lm, or CRI of 90. |
Osram unveils single-chip Dragon LEDs operating up to 2 A 22 Nov 07
The new Diamond Dragon will contain a 2 x 2 mm chip and will produce 250 lumens at a typical current of 1.4 A. |
Lexedis unveils high-CRI powerXED emitter 16 Nov 07
Lexedis Lighting has developed a tri-band phosphor that enables Ra of 90 in warm white, with good rendering of red colors. |
Lumileds K2 with TFFC technology operates at 1 A 15 Nov 07
A new chip technology and improvements to the K2 package have enabled Lumileds to introduce a power LED that is binned and tested for standard operation at 1000 mA. |
Editorial comment: Power LEDs and the numbers game 17 Sep 07
Comparing data from one press release to another can be a tricky task. |
Cree breaks efficacy records for power LEDs 13 Sep 07
R&D measurements verified by NIST show that Cree has developed LEDs driven at 350 mA that have efficacies of 129 lm/W and 99 lm/W for cool and warm white, respectively. |
Seoul launches new version of Acriche AC emitter 13 Sep 07
Seoul Semiconductor has increased the performance and reduced the cost of its AC-driven LED. |
Cree R&D achieves 1,000 lm from single-chip LED (update) 07 Sep 07
A single-die, cool-white LED driven at 4 A has produced 1050 lumens in Cree's R&D lab. |
Enfis array exceeds 1,300 lumens in neutral white 06 Sep 07
At next week's PLASA show, Enfis will exhibit neutral white arrays that achieve 1365 lumens from an emitting area of just 0.5 square cm. |
Osram supplies LEDs for street lights, unveils new Dragon 03 Sep 07
Osram LEDs have been used in solar-powered streetlights in two Austrian towns, and a new version of the Golden Dragon has been unveiled with 20- or 40-degree optics. |
Photonic Lattice LEDs are new class of light-emitting device 29 Aug 07
Using photonic lattice technology it is possible to build large-area chips that enable ultra-high power sources for projection and other applications, writes Robert Karlicek of Luminus Devices. |
Lumileds introduces white Rebel with 100-lumen minimum flux 12 Jul 07
Newly available version of cool white Luxeon Rebel LEDs from Lumileds have minimum flux levels of 90 lm and 100 lm, measured at 350 mA. |
Lumileds introduces thin film flip chips to boost LED brightness 11 Jul 07
A new chip design is already being used by Lumileds in its Luxeon Rebel and Flash products. |
Cree XLamp LEDs available in volume at 100 lumens 28 Jun 07
Cree has announced that the top bin selection for its XLamp XR-E LEDs now has a minimum luminous flux of 100 lm at 350 mA. |
Osram reports record lab results for red, green chips 28 Jun 07
In the lab, Osram has measured outputs exceeding 180 lm at 1 A for green chips and more than 300 lm at 2 A for red chips. |
Lumination Vio LED combines 405 nm chip with new phosphors 14 Jun 07
GE's Lumination division has introduced a power white LED that specifically targets the lighting market. |
Lumileds presents new analysis of power LED reliability 04 May 07
A new method of looking at statistical data for LED lifetime and reliability should help bridge the gap between LED makers and lighting designers, says Lumileds. |
PerkinElmer adds products to ACULED family
02 May 07
Two new multichip LED packages from PerkinElmer offer higher lumen output and the flexibility to create a custom configuration. |
Lamina closes $7 million round of financing 30 Apr 07
The latest funding round for Lamina will expand operations and boost its worldwide sales & marketing plan. |
Warm and neutral white LEDs extend Luxeon K2 capabilities 25 Apr 07
For the first time, Lumileds' Luxeon K2 is available in warm-white (3000K) and neutral-white (4100K), and both can be driven at up to 1500 mA. |
Lamina unveils world's brightest LED light engines 17 Apr 07
Lamina's TitanTurbo light engine is capable of surpassing the performance of a 75 W incandescent PAR-30. |
LED array maker Enfis starts trading shares 29 Mar 07
UK-based Enfis has floated 36% of its shares on the AIM market in London. |
Luxeon Rebel redefines dimensions of power LEDs 27 Mar 07
The new Lumileds power LED has a very small footprint and could enable thin and compact lighting designs. |
Cree announces "lighting-class" warm white LEDs 21 Mar 07
Cree has announced a significant performance increase in its warm-white LEDs, which are now qualified to operate at 700 mA and can produce well in excess of 100 lm. |
Seoul Semiconductor releases updated Acriche light source 15 Mar 07
A new version of Seoul's AC-LED features a single emitter on a PCB and has 20% higher brightness than its predecessor. |
Panasonic grows power LEDs on GaN substrates 07 Mar 07
Panasonic is to introduce white LEDs based on blue chips grown on GaN substrates, eliminating many of the problems associated with LED growth on sapphire. |
Cree unveils 700-micron EZBright power chip 28 Feb 07
A new power chip from Cree enables to the company to address a broader range of lighting markets. |
High-power LED arrays use optimized chip-on-board technology for brilliant performance 23 Feb 07
In order to reap the benefits of high power LEDs, special requirements concerning thermal management and opto-mechanical layout have to be met, explains Oliver Kückmann of PerkinElmer ELCOS GmbH. |
Osram reports output exceeding 1000 lumens for Ostar LED 19 Feb 07
The next version of Osram Opto Semiconductors' Ostar Lighting LED will have an output of up to 1000 lumens. |
Cree XLamp XR-C LED broadens power portfolio 14 Feb 07
A new version of the Cree XLamp addresses applications that do not require the highest brightness. |
Lumileds reduces efficacy drop-off at high currents 14 Feb 07
Chip-level technology breakthroughs at Philips Lumileds indicate that future commercial power LEDs will retain high efficacy at high drive currents of 1000 mA and above. |
WEB EXCLUSIVE: Warm white LEDs ready for a leap forward in 2007 14 Feb 07
Market availability of warm-white power LEDs is limited by requirements for both high efficacy and long-term stability, writes Tim Whitaker. |
New Lumileds power LED is a small secret 11 Feb 07
Lumileds will unveil a miniature power LED in a few weeks' time. |
Cree XR-E LEDs deliver up to 210 lm at 1 A 29 Jan 07
Additional testing of XLamp XR-E LEDs has qualified them to operate at up to 1 A, for applications such as portable lighting where maximum luminous flux is required. |
Philips Lumileds reports 115 lm/W power LED at 350 mA 23 Jan 07
New results from Lumileds indicate an output of 136 lm at 350 mA for white LEDs, corresponding to 115 lm/W efficacy. |
High-power in a 1 mm square chip: the origins of the 350mA "one watt" LED 23 Nov 06
The term "one watt LED" is widely used in the industry, but the designation was not conceived through deliberate engineering decisions, as Steve Landau of Philips Lumileds explains. |
