LED Luminaries

LED news and insight from our technology editor Steve Bush, who has been messing with LED lighting for more years than he would care to remember.

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Lumileds has released assembly and handling instructions for its compact Luxeon CoB range.

Plenty of down-to-earth information in there.

These CoBs are available in: 80CRI and 90CRI and 3-step MacAdam ellipses, and are all hot-tested at 85°C…

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Patents: Nichia Everlight

According to Nichia:
A further new white LED patent which covers, among others, YAG phosphors has been granted by the European Patent Office in favour of Nichia, namely EP 2 276 080.

With the grant of this new patent, Nichia has immediately started to enforce the patent against Everlight. On…

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Iris scanning phone uses Osram ir led

Iris scanning phone uses Osram ir led

Fujitsu’s Arrows NX F-04G phone it secured by iris scanning – it will not un-lock until it views the correct iris.

Osram is supplying the led used as an infra-red source for the scan.

“These ireds are the only ones capable of the high power needed for…

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Litecool eliminates secondary optics in spotlights

Litecool eliminates secondary optics in spotlights

Litecool of Sheffield has managed to get a 36deg beam and >90% efficiency from a packaged LED with no secondary optics, and CEO James Reeves seems confident narrower beams are possible without much further loss in efficency.

It the proof-of-concept device, which ws an attempt at producing…

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Lumileds puts colour into 3535 package

Lumileds puts colour into 3535 package

Lumileds has launched Luxeon 3535L Color Line – a range of coloured led di in ite 3.5 x 3.5mm package.

Colours are: red, red-orange, PC amber (phosphor-converted), lime (also phosphor converted), green and blue.

“The success our customers have had with our high power colour emitters convinced…

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Litecool 2.5kg high-bay

Litecool 2.5kg high-bay

You have got to hand it to Litecool of Sheffield, it certainly knows how to get heat out of leds*, as it is demonstrating with a remarkably small (take a look at the ruler on the desk) 2.5kg (including heatsink) 10,000 lm high bay luminaire.

And the heatsink…

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MD-SIG releases PSU-light engine spec Read More
Led for automotive head-up displays

Led for automotive head-up displays

Osram is aiming at automotove head-up displays with an led colour-coordinated with TFT displays and viewing white point requirements.

Called Oslon Compact CL, is has a 1mm die. “A ceramic converter ensures that the colour locus remains constant even at high temperatures,” said the firm. “The quality of…

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Robust high-bay from Osram

Robust high-bay from Osram

Based around Osram’s Oslon Square leds from Osram subsidiary Siteco, Compact High Bay does what is says on the tin – working in room heights from 6 to 15m.

It is intended as an alternative to 250 or 400W metal halide or high-pressure sodium lamps (HIE/HIT or HSE…

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Cree puts four leds into XP format

Cree puts four leds into XP format

Cree has put a monolithic ’12V’ four junction die into its ‘XP’ package.

Maximum power is now a shade under 13W (1A), although specified current is 350mA for about 700lm out.

In comes in lensed and lens-less versions.

Take a look at the XPH35 series on the Electronics Weekly…

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Litecool: dielectric beats copper for LED cooling

Litecool: dielectric beats copper for LED cooling

You have got to hand it to Litecool of Sheffield, two interesting cooling developments in as many weeks, plus a whole new way to eliminate MCPCBs two months ago.

Its latest cooling idea has been to find a dielectric that conducts heat three times better than copper – which it is…

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Power-over-Internet is good for lighting...?

Maxim has released a white paper explaining the basics of Power over Ethernet (PoE) to feed and control LED lighting.

It suggests 13, 25.5, or 51W is available to power LEDs depending on the category of cable installed and the number of pairs in the cable allocated to power…

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