Nordic Semiconductor is changing over to component reels made from recycled plastics, becoming one of the first chip companies to make the switch, it said, and reducing plastic waste by almost 15,000kg/year. The majority of the company’s component packaging reels are now made from re-ground high-impact polystyrene. Nordic tested the recycled plastic component reels against its traditional non-recycled reels to ...
Not-for-profit EngineeringUK is warning that lack of Government planning and resources in the STEM educational pipeline is putting de-carbonisation at risk. “It’s clear that we could be sleep-walking towards a net zero engineering skills shortage without knowing how big the skills and educational gaps are and where they are,” said EngineeringUK head of environmental sustainability Mike Hardisty. “We need to ...
Osram has introduced a green laser diode as a replacement for red lasers in human-visible applications such as levelling, scanning and dot projection. Called PLT5 522EA_Q it “enables manufacturers to benefit from the 4x brighter appearance of a green laser compared to red”, according to the company. “The laser has been tested for lifetime at 70°C [and] its ratings are ...
Why has Plessey gone to the trouble of creating a GaN-on-Si micro-led display process that emits green? Intensity and efficiency are the reasons, according to the firm’s director of micro-led applications Clive Beech. The firm’s original technology, which started life in the University of Cambridge, builds InGaN quantum wells over a silicon substrate using over 100 epitaxially-grown layers that prevent ...
Plymouth-based Plessey has revealed green-emitting micro-LEDs made on a planar gallium nitride on silicon (GaN-on-Si), whose light is not made by phosphor conversion. “To produce green light, LED manufacturers typically apply phosphors or quantum dot conversion materials to native blue LEDs. These materials then convert short wavelength, typically 450nm blue, to red or green wavelengths with typically 10% to 30% ...
Osram has released a green laser for phone-based projectors, capable of delivering 140mW pulses. Although a projector also needs red and blue lasers, green is the colour that poses the greatest challenges in semiconductor laser and LED production. “Up to now, RGB laser projections for smartphones, based on a red, green and blue laser, often had brightness problems,” according to ...
The ‘green gap’ – the lack of efficient semiconductor materials that produce green light – has been the target of research at many organisations. Osram Opto is the latest to have a go, using indium gallium nitride (InGaN)-based green LEDs. It claims to have reduced typical forward voltages by around 600mV and increased optical output power at the same time, ...
Rensselaer Polytechnic Institute and the University of New Mexico have got together to develop a way of growing cubic GaN on silicon substrates. Compared with the hexagonal GaN used in all commercial leds, cubic GaN has a lower bandgap and therefore emits longer weavelengths for a given level of indium doping – potentially stretching efficient emission into green. There is ...
US researchers have patented a way to make cubic GaN for LEDs, which show promise for bridging the 'green gap'
Exposing migraine sufferers to a narrow band of green light significantly reduces photophobia and can reduce headache severity, according to a report by researchers at Beth Israel Deaconess Medical Center in Harvard University and published in Brain: Migraine photophobia originating in cone-driven retinal pathways. “Although photophobia is not usually as incapacitating as headache pain itself, the inability to endure light can be ...
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