COMMENTARY
LED patents: A tale of two verdicts
NEWS & ANALYSIS
• LED Holdings teams with LSG
• LED streetlights in Ann Arbor
• Clinton Climate Initiative embraces LEDs
• Osram nominated for German prize
• Cree LEDs make a splash
• Patent news
VEHICLES
LED headlamps illuminate the way forward
Cadillac has joined Lexus and Audi by introducing a new car that uses white LEDs for forward illumination, reports Tim Whitaker.
VEHICLES
Hella develops LED headlamp prototype
Lighting manufacturer Hella recently shared details of its full-LED headlamp prototype that uses different transmissive optical elements. Each module in the headlamp contains a multi-chip LED array.
VEHICLES
Frankfurt showcases LEDs in cars
Car makers continue to investigate new ways to use LEDs for vehicle lighting.
EVENTS
LEDs 2007 conference in photos
INTERVIEW
George Craford of Philips Lumileds
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.
CONFERENCES
LED workshop identifies business and technical opportunities for Europe
A recent workshop held in Germany allowed industry experts to discuss opportunities and challenges facing the LED marketplace and the solid-state lighting sector, writes EPIC's Tom Pearsall.
DISPLAYS
LEDs make a stand in Frankfurt
There was no shortage of LEDs at the biennial IAA motor show in Germany.
OPTICAL DESIGN
Illumination design software models LED color mixing
The use of illumination design and analysis software enables verification of the efficacy of color mixing of LEDs prior to product fabrication, saving time and expenditure, say Ryan Williamson and John Koshel.
OLEDs
OLLA project proposes standard for OLED luminous efficacy measurement
The European OLLA project has released a discussion paper on the measurement of luminous efficacy for OLEDs, with the goal of developing a general standard.
DRIVERS
Boost converter LED drive systems for emergency backup lighting
In the third in a series of articles on power converters, Iain Mosely describes how the Boost converter switching topology can be used to drive LED systems for emergency backup lighting.
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