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
Plessey has acquired University of Cambridge spin-out CamGaN, and will be using its technology to make white power LEDs in Plymouth.
Its critical intellectual property is a way of growing LED-quality GaN on silicon substrates.
"This technology is the product of substantial R&D investment over the past decade and the plans for its commercial development within Plessey have tremendous potential," said co-inventor Professor Sir Colin Humphreys, director of Cambridge's centre for GaN.
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.
A bit of cross-fertilisation of blogs...Power measurements on fluorescent and LED lights are another key application. Since the switching frequency of fluorescent lights can be tens of kilohertz, a wide range power measurement is required. In addition, dimming control using PWM modulation circuit is used with LED lights.
Two Californian chip makers have announced their first forays into
dimmable power factor corrected LED drivers, writes Steve Bush.
Linear Technology has produced a single-stage flyback design and
iWatt - fabless producer of low stand-by phone charger chips - has
plumped for a more traditional two-stage topology.
LED lighting products are becoming more and more prevalent. The market for these products is extensive; practically any traditional method of lighting can be replaced with a planet-friendly LED version. LEDs make an excellent domestic light source because of their long life and excellent energy efficiency.
Vishay has introduced a series of ceramic package bases for high-power LED die, with thermal resistance down to 3K/W, writes the Electronics Weekly Technology Editor, Steve Bush.The LSUB series is available in two configurations: 'standard', for conductive epoxy or thick solder (greater than 12μm) die attach, and 'offset' for thin (2-3μm) solder layers.LED and laser applications are expected, in automotive, industrial, and homes.
Designed to accommodate die that are approximately 1x1mm, the pad size of the standard configuration is large enough to accommodate a parallel diode for ESD protection.
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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