LED reddens as it dims for soft lighting
LED Engin is to reveal details of an LED that dims like a halogen bulb, reddening as its output drops, at Light+Building in Frankfurt (15 – 20 April), writes Steve Bush.
Colour
50W LED offers near-perfect colour rendering
Bridgelux has released an LED family with a colour rendering index of 97, writes Steve Bush.
Video: Huey, the colour matching LED Chameleon
Just so ever slightly creepy, maybe – but a bit of fun to highlight on a Friday. Yes, it’s an LED Chameleon. Or Chameleon LED…
The history of the LED
In conjunction with our 50th anniversary issue, Technology Editor Steve Bush has produced a history of the LED.
1W of infra red light from an LED
Osram has stacked two die to produce almost 1W of infra red light from an LED, writes our technology editor, Steve Bush. “With its 1mm2 thin-film chip stack, at a driving current of 1A it generates almost twice the output of the standard chips that have been used up to now,” claimed Osram.
OLEDs with color temp spectrum of sunlight - Update
Our Technology Editor, Steve Bush, got on the case to dig further into this work. Make sure you read the resulting article – Voltage tunes OLED across all sunlight hues.
Taiwan researchers create OLEDs with color temp spectrum of sunlight
An interesting OLED development to note – from EDN’s Technical Editor Margery Conner’s PowerSource blog
Changing Colour Magnetic Ball Lamp
Check this out. Described as the Magnetic 4-Ball Color Changing Lamp, it does pretty much what it says on the tin: it features four magnetically attached balls with LED lights inside that change colors.