About LedPower.co.uk

The technology behind led lighting is simple. For the size of the led these are giants among lights. In the last ten years led lighting has evolved from status and indicator lights like the red light that tells you your television is on standby to the green light that tells you it is now been turned on

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What is LED Power?

Do you know exactly what it is?

LED translates as Light Emitting Diode, an electronic device that lights up when electricity is passed through it.( a semiconductor device taht produces light when activated with an electric curent.).

LED's are usually red.

They are good for displaying images because they can be relatively small, and they dont burn out. However they require more power than LCD's.

What is an LCD? .

LCD is short for Liquid Crystal Display, a type of display used in digital watches and many portable computers. LCD displays utilize two sheets of polarizing material with a liquid crystal solution between them. An electric current passed through the liquid causes the crystals to align so that light cannot pass through them. Each crystal is therefore like a shutter, either allowing light to pass through or blocking the light. Monochrome LCD images usually appear as blue or dark grey images on top of a greyish white background. Colour LCD displays use two basic techniques for producing colour. Passive matrix is the less expensive of the two tecnologies. The other technology is called thin film transistor (TFT) or Active Matrix, produces colour images that are as sharp as traditional CRT displays but the technology is expensive. Recent passive-matrix displays using new CSTN and DSTN technologies produce sharp colours rivaling active matrix displays. Most LCD screens used in Notebook Computers are backlit, ot transmissive to make them easier to read.

So where have we got to?? LED translates as Light Emitting Diode....so what is a Diode?

A Diode is an electric component that conducts electric current in only one direction, functioning as a one way valve. Diodes typically are made from semiconductor materials such as silicon, germanium or selenium and are used as voltage regulators, signal rectifiers, oscillators and signal modulators/demodulators. In computer equipment diodes are commonly used to emit light by passing through it, as in Light Emitting Diodes (LEDS).

So a LED is a small area light source, often with optics added to the chip to shape its radiation pattern and assist in reflection. Leds are often used as small indicator lights on electronic devices and increasingly on higher power applications such as Torches and area lighting. The colour of the emitted light depends on the composition and condition of the semiconducting materials used, and can be unfrared, visible or ultraviolet. Leds can also be used as a regular household light source. Besides lighting, interesting applications include sterilization of water and disinfection of devices.

So Where did this technology come from?