Tech news tagged ‘LED’

IBM builds blue LEDs on graphene

IBM has shown graphene can be used as a non-stick layer between silicon carbide wafers and epitaxial GaN – allowing the expensive SiC wafer to be used multiple times.

The graphene layer (which it self is epitaxially grown) stays with the SiC – like teflon on frying pan – so the wafer…

Read More

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…

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