Latest Tech News About LED Components

Heat tape offers 0.8W/mK

Bond-Ply 800 from Bergquist takes thermal conductivity to 0.8W/mK, and cures at room temperature. The double-sided tape is intended for attaching heat spreaders or heatsinks to assemblies like LED light engines, motor controllers, power converters, or high-performance processors. It has a fibreglass carrier and acrylic…

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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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Cree's surface-mount CoB alternative

MH-B is a 4.4W (37V 120mA) 5x5mm lighting LED from Cree. The idea is that it can replace a whole bunch of single die medium power LEDs, and still be assembled by pick-and-place. Output is around 500 lm (80CRI, 3,000K), and colour temperatures from 2…

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Just when you thought there was nothing new in optics

Ledil has shortened a collimator for CoBs by some cunning Fresnel-like compression. Called Winnie and for CoBs up to 21mm source diameter, it is only 19mm thick for beams from +/-8° to +/-14°, depending on source size. Even with the unusual light intake, not much has been lost in…

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IR LED emits up to 4.5W at 850nm or 940nm

Up to 4.5W at 850 or 940nm is available for security lighing now LED Engin has put four dual-junction die in its 7x7mm LZ4 package. It has also released a single die LZ1 (4.4×4.4mm) version, and a single-junction four die version. For more information, take…

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Osram achives IR LED high

Osram has pushed up the power of its 850nm Oslon Black leds, upping output to 800mW from 630mW in the ‘A’ suffix version of its SFH 4715. This is a 90° led intended for security illumination. For feeding narrow-beam reflector optics, there is also a 150° SFH 4716A. For…

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Silicone Lenses for COB LEDs

   Khatod has introduced silicone lenses for CoB arrays, called SIO3. The material has been chosen for its: sustained transparency over years, resistance to yellowing, UV-resistance, optical efficiency, lack of birefringence, temperature resistance (-40 to 150°C, 200°C peak), and flexible at low temperatures. Designed for streetlights, depending on…

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Nichia argues for novel mid-power led encapsulation

Nichia has published a white paper discussing encapsulation materials for reliable mid-power leds. It is quite detailed, and includes Nichia’s critisism of polyphthalamide (PPA – its benzine rings photo-degrade). The firm’s replacement is decribed as ‘thermoset composite and inorganic materials’, in some sort of matrix, it appears…

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