LED Lighting guides
Here in one neat package is our collection of key LED lighting articles, covering white LEDs, coloured LEDs, OLEDs and Lighting LEDs...
* White LEDs
* Coloured LEDs
* LED Lighting (1)
* LED Lighting (2)
* LEDs General
* LED Optics
* OLEDs
* Costing LEDs
* LED heatsinking
* 50 year history of the LED
In the early days of power LEDs, many lighting firms rushed out solid-state luminaries only to find them failing in service.
The problem was heatsinking. Manufacturers were used to filament bulbs that run hot and are cooled by radiation, and fluorescent tubes that have a huge surface area from which heat convects.
Conductive cooling, the mainstay of electronics, was a black art.
In the 19th century, Africa was dubbed 'The Dark Continent' and night-time satellite pictures of Africa show it is not a misnomer. But no one has done anything about it until now.
Back in 1960 Electronics Weekly was born into a ferment of III-V semiconductor research that within two years would produce the first practical LED.
In 1960 Dr Nick Holonyak of General Electric was developing an unusual material, GaAsP, as a route to wide bandgap tunnel diodes.
12:00...12:00...12:00 - Everyone has seen a VCR blinking 12:00 24 hours a day. There are very few VCRs anymore, but millions of DVDs, DVRs, and STBs that have replaced them. Every one of these consumer components has an LED display or an LCD display with an LED backlight. Some still blinking 12:00.
Rising energy costs and government funded green initiatives are driving operators of public lighting systems to look to new technologies.Read the full article >>
The move to LED technology will require a redesign of a lighting fixture. At this redesign stage, for a very small incremental cost it is also possible to add wireless control to a lighting fixture.
"LEDs with a power dissipation of 35W or more are now available. Such lights are so bright that they are uncomfortable, if not dangerous, to look into directly, but with increasing power, there is increased thermal load and more heat to dissipate. Adherence to the sound thermal design principles described in this article will ensure the best performance and the longest life."So begins a guest columnist Adrian Rawlinson, MD of Marl International, who describes techniques for the thermal design of high brightness LED packages in lighting systems. See - Good thermal design extends LED lifetimes
AC-DC power supply makers are introducing constant-current models for lighting manufacturers moving into the LED illumination market, writes our Technology Editor Steve Bush.
Here's another one that got my attention, on a recent gadget trawl: a glowing solar LED lamp. What are the chances of this one catching on?
This one caught my eye over the weekend - Eternaleds is claiming the world's first liquid-cooled LED light bulb, the HydraLux-4. 
Power Integrations has released an 92% efficient LED streetlight power supply reference design, reports our Technology Editor Steve Bush. For streetlights up to 150W, the supply has a fixed output voltage of 48V at up to 3.125A.
LEDs are being used to change the way art is viewed in China. Specifically, exhibits at Da An Art Gallery in Zhongshan City, China, are spotlighted by Z-Power LEDs from Seoul Semiconductor.
See also Electronics Weekly's roundup of content related to LEDs, with a special focus on both white LEDs and coloured LEDs, and Lighting LEDs.
* White LEDs
* Coloured LEDs
* LED Lighting (1)
* LED Lighting (2)
* LEDs General
* LED optics
* OLEDs
* Costing LEDs
* 50 year history of the LED
Paul Ward
As Opto Product Manager at Farnell, Paul is overseeing the company's involvement in the rapidly evolving and high profile LED lighting market sector.
As well as ensuring that Farnell offers the latest technologies and products related to solid state lighting, Paul is also responsible for ensuring that the resources are in place to make it easier for design engineers to specify and design-in LED solutions for their applications.
Educated in Production Engineering and Design at Sheffield Hallam University, Paul has worked in various engineering, training and marketing roles for companies including C&K switches, ITT Cannon, Cherry and LED specialist Chicago Miniature Lighting.
Away from the world of LEDs, Paul is a Founder of the charity RTTW, Photographer and Harley Davidson rider; he has ridden and snapped across Europe, New Zealand and the USA on his chrome hog!
Gordon Routledge
Gordon Routledge is one of the original pioneers in LED illumination having worked with LEDs in illumination applications since 1996. Currently VP of Illumination at Dialight, Gordon founded Lumidrives in 2001, having previously been managing director at ACDC Lighting Systems. Gordon has a degree in Electrical & Electronic Engineering from university of Manchester Institute of Science and Technology.
Ian Bryant
Ian Bryant is Business Development Manager LED Division at Carclo Technical Plastics. He has worked on and off at Carclo (Formerly Combined Optical Industrial) since leaving school. He has worked through the company from Toolmaking to starting the company on the road of LED optics business some 6-7 years ago, starting with a standard range and more in line with the business of custom optics. In between all this he has worked in engineering and as a works Director for a hydraulics company but kept getting pulled back to the optics industrial. We are able to offer the full solution from idea to parts so have a very good understanding on what is needed. You will see some posts from our design team also under my name.
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