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
An economically scalable route to high-volume manufacture of flexible
OLED displays is the objective of programme kicked off by two European
labs, writes Steve Bush.
"The shared program will bring together partners from across the value chain to tackle challenges such as high resolution, low power consumption, large area, outdoor readability, flexibility and light weight," said Belgium research lab IMEC, which has partnered with Dutch lab Holst Centre.
Even though OLED technology is in its infancy, small rigid displays are already wowing consumers in high-end phones like Samsung's Galaxy.
The EU has kicked off a project to make large-area OLED lighting modules with built-in intelligent light management, writes Steve Bush.
Large area OLED is one contender to replace fluorescent lighting, with sheets of light emitter under 1mm thick.
See also: LED technology - OLEDs (Organic light emitting diodes)
Called IMOLA (Intelligent light Management for OLED on foil Applications), the project is intended to spawn technology and demonstrators for future for wall, ceiling and car dome lighting, whose light intensity will self-adjust according to, for example, the time of the day or weather conditions.
Backlighting was originally largely done with electroluminescent layers which offer pale green and a limited range of other colours.
The introduction of LED backlights has not only broadened the spectrum, but allowed a choice of colours in a single display.
"Film-compensated STN alphanumeric displays with RGB backlights have a neutral colour background and the RGB backlight allows the engineer to change the background, to red for example, to signal fault conditions," said RS's Caddy.
"This demonstration has shown the potential for patterned metal tracking using electroless metal deposition as a replacement for both ITO and traditional sputtered tracking," said CDT. "ITO is widely used as a transparent conductor in the displays, lighting and photovoltaics industries, but is in short supply and expensive."
Osram has introduced the first OLED lighting product. Called Orbeos, the warm white area emitter is 80mm diameter, 2.1mm thick and weighs 24g, writes our Technology Editor, Steve Bush.
We highlighted Philips' promotion of Lumiblade OLED technology recently. And it was such a rich seam of material we have created a new picture gallery devoted to the subject....
Speaking of large displays - building-vertising - here's another, but on a slightly smaller scale. Check out Mitsubishi's 155-inch OLED display, which can apparently be expanded to any size, as smaller displays can be combined together. 
Project TOPLESS is creating Polymer-OLED desk lamp prototypes, reports OLED-info.com:Researchers at National Tsing Hua University in Taiwan have developed organic LEDs (OLEDs) with a full range of color temperatures capable of mimicking the full spectrum of sunlight throughout the day (2500 K - 8000 K), making the technology especially useful for lighting in northern countries.
As the researchers explain, changing the voltage varies the color temperature by increasing the number of electrons and holes transported between certain layers. For example, at 3 volts, the illumination is predominantly red, at 5.5 volts it turns to pure white, and at 9 volts becomes bluish white."See Researchers develop OLEDs with color temp spectrum of sunlight
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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