LED TVS ARE SLOWLY BUT SURELY PUSHING ITS PREDECESSOR, THE LCD, INTO THE OBLIVION. BUT HOW DO THEY MANAGE TO BE SLIMMER, BRIGHTER AND BETTER?
Light emitting diodes, or LEDs, are replacing the cold cathode fluorescent lamps (CCFL) used in conventional LCD displays. LEDs are tiny light bulbs that fit easily into an electrical circuit and are capable of creating light. They have no filaments and hence don’t generate much heat. An LED TV is actually an LCD panel that has been illuminated by these light-emitting diodes.
LEDs consist of small semiconductors, which glow during exposure to electric current. This current flows between LED anodes, which are positively charged electrodes, and LED cathodes, which are negatively charged electrodes. As the electrons stream across the semiconductor, they create electromagnetic radiation. Some forms of this electromagnetic radiation can take the form of visible light.The light that is created an LED can be of any colour and can even be ultraviolet or infrared. This colour depends on the material used to make the semiconductor and the current run through it. Tiny LEDs are already replacing the tubes that light up LCD HDTVs to make dramatically thinner televisions.