LED Lighting News

LED lighting driver tunes to ZigBee for control

Yorkshire LED lighting driver maker Harvard Engineering has added ZigBee wireless control to its range of lighting power supplies. The 33W driver, called CLZ and part of the firm’s CoolLED range, offers dimming down to 1% and includes a 2.4GHz radio – either built-in or remote (pictured). Radio…

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Sheffield firm slashes LED thermal resistance

Finding a way to deposit vertical dielectric barriers has allowed Litecool of Sheffield to make dramatic cut in LED thermal resistance – from 1.25 to 0.5°C/W is one case – see diagram. Dielectric layers are essential to separate electrical conductors but, with a few notable exceptions like diamond…

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Ikea invests in French GaN-based LED lighting firm

Ikea’s venture capital arm has invested in a French firm developing and manufacturing 3D LEDs. Grenoble-based Aledia is developing LEDs  for lighting based on a gallium-nitride-on-silicon technology. Ikea believes there is this low-price LED lighting technology for residential use has the potential of faster…

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60,000hour LM-80 life for Lumileds mid-power lighting LED

Lumileds announced LM-80 test results for its 3535L mid-power lighting LED. 10,000 hours of tests at 55, 85 and 105˚C showed the device exceeds lumen maintenance requirements for both Energy Star and qualification by the DesignLights Consortium (DLC). Projections based on TM-21-11 predict at…

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Imec demoes full-colour OLEDs

Imec and Fujifilm have demonstrated full-colour OLEDs by using their jointly-developed photoresist technology for organic semiconductors, a technology that enables submicron patterning. This paves the way to producing high-resolution and large organic electroluminescent (EL) displays and establishing cost-competitive manufacturing methods. Organic EL displays can be made…

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Micro LED arrays display achieves 1,000,000 cd/m2

French lab CEA-Leti has demonstrated a way to make high-density micro LED arrays for wearable vision. The LEDs are GaN/InGaN – the technology behind white LEDs – with a pitch of 10µm or less. “Currently available microdisplays for both head-mounted and compact head-up applications suffer from…

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Prize-winning photograph of an LED nano-structure

The remarkable photograph of an LED nano-structure was taken by a PhD student at the Eindhoven University of Technology (TU/e). It was taken with a scanning electron microscope (SEM) and was the winning photograph in a competition held by Oxford Instruments Plasma Technology. The winning photograph was submitted…

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Osram takes on CoBs in MR16 lamps

Osram is taking on chip-on-board LEDs (CoBs) in MR16 lighting applications with a 7x7mm surface-mount (SMD) array LED named Duris S 10. “In view of the surface-mounted design of the LED, a pc board has to be incorporated in the luminaire. This opens up numerous design…

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