October 2009 Archives

04nov09LedPsus.JPGAC-DC power supply makers are introducing constant-current models for lighting manufacturers moving into the LED illumination market, writes our Technology Editor Steve Bush.

High efficiency is particularly important because maximum luminair dissipation is restricted by law in many parts of the world.

One to note maybe: LED driver powers 20A constant current, says Linear Technlogy.

It has introduced a synchronous step-down DC-DC converter that will deliver a 20A current to drive high current LEDs, writes Richard Wilson.

The LT3743 will drive up to 20A of continuous LED current from a nominal 12V input, delivering more than 80W of power. In pulsed applications, it can deliver up to 40A of LED current or 160W from a 12V input.

Read the full article >>


mitsubishi 155in oled display.jpgSpeaking 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.

This particular monster is made from 720 10-centimeter square panels, and it was shown off at the CEATEC (Combined Exhibition of Advanced Technologies) show in Japan, states Technabob.
 


A big building, and a big display. Think of it as a "building-vertisement", consisting of millions of LEDs.

This "Media Facade" can be found on Bayer's former HQ in Leverkusen, reports Engadget.

A German-Austrian joint venture is to develop and produce OLED lighting in Dresden, writes Steve Bush.

Called Ledon OLED Lighting, the investors are Zumtobel Group of Austria, which owns UK firm Thorn Lighting; German applied research organisation Fraunhofer-Gesellschaft; and several employees at the Fraunhofer Institute for Photonic Microsystems (IPMS) research lab.

Osram has stacked two die to produce almost 1W of infra red light from an LED, writes our technology editor, Steve Bush.

"With its 1mm2 thin-film chip stack, at a driving current of 1A it generates almost twice the output of the standard chips that have been used up to now," claimed Osram.

"Preferred applications are those which require high radiance so that small optics can be used. This is important, for example, in pedestrian protection systems and night vision systems in vehicles."

LED Lighting guides

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

* 50 year history of the LED








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Author Profiles

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.jpgIan 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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This page is an archive of entries from October 2009 listed from newest to oldest.

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