Tech news tagged ‘LED’

An LED for insomniacs

An interesting LED from Cree slipped below my radar earlier this year.

It is a ‘far red’ version of its XP-E emitter – with peak emission around 730nm – very deep red.

A few years ago Electronics Weekly had an interesting conversation with Dr John O’Hagan of the UK Health…

Read More

Deep UV AlGaN leds

Just in case you need a deep UV led, Nikkiso of Japan is gearing up for mass production of AlGaN leds for wavelengths spanning 255-350nm.

The firm used the services of, now, Nobel prize winning professors Isamu Akasaki and Hiroshi Amano, and Meijo University.

“AlGaN is much more difficult…

Read More

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…

Read More

Art studio lighting conundrum

I have a friend who teaches Chinese brush painting.

She is rather good, and she is having the garage converted into a studio for teaching.

And she wants LED lighting.

However, all the easily available light bulbs are not exactly brilliant for colour rendering.

The led makers make suitable emitters…

Read More

LEDs take over Frankfurt

Last week I attended the Light + Building trade show in Frankfurt and found myself thinking that it should be renamed the LED + Building show. LEDs were everywhere. It was actually a struggle to find a stand without LED products at the show, although in many cases they’d been simply…

Read More

What’s the big deal with LED traffic lights?

Someone asked me this the other day, so I’ll share my answer as it involves some¬†pretty impressive figures. London has over 5000 traffic intersections, each one comprising an average of 10 traffic signals, making¬† about 50,000 signals. If those were to be converted to LED lights, the…

Read More