Latest Tech News About LED Technology

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 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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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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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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SemiLEDs tackles phosphor packaging problem

SemiLEDs is sampling white light LEDs using a proprietary phosphor technology, which it says delivers “a highly uniform phosphor coating across the emitter surface, greatly increasing colour precision and uniformity”. A feature of the technology is that it can eliminate phosphor application from the packaging process, as a result and…

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Intematix and LED lighting phosphors

White lighting LEDs are almost universally a combination of a blue light-emitting InGaN die and a phosphor that steals some of the blue light and converts it into a broad spectrum peaking at yellow or amber. The combination of blue light and yellow light looks white to humans. But…

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