Latest Tech News About LED Technology

Blood and pulse monitor chip has 3 LEDs plus photodiode

For fitness devices, Osram has combined three different colour LEDs and a photodiode in a single 4.7×2.5×0.9mm package for reflective blood oxygen and pulse sensing. Leds in the SFH 7050 are 530nm (green), 660nm (red) and 940nm (infra-red), the photodiode active surface is 1.3×1.3mm…

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Seoul omni light engine for A19 bulbs

Seoul Semiconductor has announced an led module for A19 light bulbs that uses two recently-announced products: Acrich MJT 2525 series LEDs and Acrich3 mains-voltage driver chip – Acrich is the firms brand for higher-voltage products that allow direct-off-mains operation with only a few devices, and without…

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Design your own collimator

Zemax has put a series of videos up on its website showing how its OpticStudio can be used to design a collimator for a particular LED…

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Philips combines Lumileds and LED headlight division

Philips is combining its Lumileds LED making and automotive lighting business, and may be looking for third-party investment. The firm’s statements are all very positive, and I have no crystal ball, but I wonder if competition from all and sundry has put a dent in the profits the…

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Osram packs in lasers for projection

Osram has worked on efficiency and heat sinking to get 50W of blue laser light from 26x35mm. For more details see this story on the news website…

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Diary date: LpS 2014

With more than 60 lectures and over 100 exhibitors, the international LED professional Symposium+Expo will take place for the fourth time from Sept 30th to Oct 2nd in Bregenz, Austria. One of the lecture presentations will be about the development of a new color fidelity index, called CRI2012, presented…

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Cree: 1,100 lm four die XM-L2 for '50W' bulbs

Cree has introduced a four die ‘EasyWhite’ version of its XM-L2 LED, as well as a 200 lm/W ‘XP’ device (see below). Like the original single die XM-L2, bins are available to deliver more than 1,100 lm from a 5x5mm package – so one can be used…

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L+B: Osram claims 205 lm/W wall plug efficiency

With apologies for missing it earlier: Osram has hit 205 lm/W with a LED-based fluorescent tube replacement. That is 215 lm/W without the custom 95% efficient mains power supply. Inside, said the firm, are: red leds materials with maximum reflection – not sure what that means – and “innovative…

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