Driving high brightness LEDs with switching regulators

[PeteS in CA]

Driving high brightness LEDs with switching regulators

The first LEDs produced in the 1960's were feeble infrared devices that suffered from short lifetimes and poor efficiency. The semiconductor processes used to make LEDs expanded from early silicon carbide (SiC) and gallium arsenic phosphide (GaAsP) devices to gallium phosphide (GaP) and indium gallium phosphide (InGaP) which produced red and later orange, yellow, and greenish-yellow. LEDs at that point were bright enough to be indicators, and even at this early stage they had better luminous efficiency than incandescent light bulbs.

This gives some history of LEDs and is a look at the technology that is likely to replace CCFLs in backlighting LCD displays - still uses a switching P/S, but at a lower voltage.

[willawake]

Re: Driving high brightness LEDs with switching regulators

LED lighting manufacturer Xilver delivered 5000 color changing LED lights to completely encapsulate the complete façade of a luxurious department store in Seoul, Korea.
http://www.xilver.nl/gallaria.php

LED stage lighting
http://www.pixelpar.com/pixelrange/product.htm

[MD Willington]

Re: Driving high brightness LEDs with switching regulators

Wow.. bet that cost a bundle.

I just picked up some tri-led flashlights from the "Dollar Tree"... $1USD a piece.. Seem to work okay, the kids think it's fun to flash me in the face with them.. DOH!

Friggin bright!

[starfury1]

Re: Driving high brightness LEDs with switching regulators

Remember the price of BLUE LED's when they first hit the market

Expensive Pilot light....now they are eveywhere

bit of history

pdf maruska history of blue led

led history wikipedia

old article Shuji Nakamura: Dream of the Blue Laser Diode

[kc8adu]

Re: Driving high brightness LEDs with switching regulators

http://ledmuseum.home.att.net/

[willawake]

Re: Driving high brightness LEDs with switching regulators

http://www.ultraleds.co.uk