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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Cree makes a fuss about light guides

Cree makes a fuss about light guides

 Cree has announced a light guide technology branded ‘WaveMax’.

And that is about all that has been said.

It has ‘DiamondFacet’ optical elements, achieves “up to 90 percent optical efficiency” and is used in the firm’s LN (office) and IG (garage) luminaires.

No you know as much as anyone…

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Luminus chases ceramic metal halide

Luminus chases ceramic metal halide

Luminus want a slice of retail lighting with its XH series CoBs.

Right now I am struggling to find much more information. What I have is on the Electronics Weekly news site.

If you are at Lightfair, I suspect Luminus will tell you all you need to know.

&nbsp…

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No-solder package will approach 150 lm/W

No-solder package will approach 150 lm/W

It is not often you hear of a new packaging concept for LEDs.

Three days ago Litecool of Sheffield got patents for an adhesive-backed one – that can be pick-and-placed straight onto a heatsink.

Carclo 10mm lenses can be places straight on top.

Not only that, but it…

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Where are the rectangular die?

Where are the rectangular die?

If optic diameter is important, forming letter-box beams is such a struggle, that the likes of Lumileds, Cree and Osram should make some nice rectangular die.

Only my opinion of course, fuelled by my attempts to make anti-dazzle bicycle lights, but I am sure designers of wall-washers…

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SMD leds for automotive light guides

SMD leds for automotive light guides

Osram has introduced a range of leds for feeding light guides in automotive external lighting.

All the packages have the same 2.7 x 2.0 x 0.6mm external characteristics, despite the range of die colours and die sizes available.

Called Synios P 2720, the family is aimed at…

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850nm IR output climbs to 1.3W

850nm IR output climbs to 1.3W

Osram has increased the output of its Oslon Black 850nm  infra-red LEDs for the second time in six months.

Aimed at security camera illumination, SFH 4715AS can deliver 1.34W of IR at 1A (at 3.2Vtyp) with a +/-45° beam angle.

The package remains 3.85 x 3…

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Thin light guide for general lighting

Thin light guide for general lighting

Ohio-based Global Lighting Technologies (GLT) intends to compete with OLED lighting using thin light guides – 2mm over much of the area and 3.5 at the edges of the 100x100mm version it is exhibiting at Lightfair. For slightly more information, see the GLT on the Electronics Weekly news website…

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Cree boosts LMH2 to 125 lm/W

Cree boosts LMH2 to 125 lm/W

 Cree has introduced LMH2+, a higher efficacy version of its LMH2 light engine.

Because the modules include both white (blue die amber phosphor) and red leds, 125 lm/W and 90 CRI are available together.

“The LMH2+ is a drop-in upgrade for LMH2-based designs,” said Cree – which is…

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Germans put more money into LED lighting industry Read More

Graphene LEDs

The University of Manchester has made LEDs using a quantum well heterostructure made from 2d materials including graphene, boron nitride, and molybdenum disulphide.

Efficiency isn’t far behind OLEDs.

For more, scroll to the bottom of this graphene led story on the main Electronics Weekly website…

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For very fat leds, a 20A (40A peak) driver chip - and it's agile

For very fat leds, a 20A (40A peak) driver chip - and it's agile

  Linear Tech’s LT3744 synchronous buck converter is designed to deliver 20A constantly from 12V, or 40A pulsed – this is 80 or 160W according to the company, so it is assuming 4V Vf.

As it is intended for use in projectors, the design allows quick transitions between output current levels…

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Philips gets excited about Lumileds merger

Philips gets excited about Lumileds merger

Philips is really keen that everyone should know that it is combining its automotive and led (Lumileds) businesses, and it looks like it is happening on the 1st of April.

This should be interesting because, after a great start, Lumileds appeared to take its eye of LED headlights, leaving Osram…

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