Oled - The Future Of Television
Forget everything you already know about tv's and imagine one that's only a few ounces in weight
, thin as a piece of paper and flexible enough to roll into a tube while still displaying images with no loss of detail, and you'll start to appreciate the power of organic LED TV (or OLED).
An OLED TV is one that uses organic based compounds to emit red, green and blue light which, when combined, can be used to make over 16 million colours. They are available in two types - small molecule and polymers; the world's first screen, built by Sony, used small molecules due to their long lifespan.
The panels work by compressing a layer of organic materials between a cathode and anode, and further squeezing these between a top and bottom glass plate. The display is then supported by hardened plexiglass to keep its shape and protect the tv from damage.
Electric currents are then passed through the cathode and anode, causing the organic materials to emit a bright electro-luminescent light.
As the organic materials are producing their own light, an screens don't require backlights like LCD's do. This means they can be made extremely thin and require substantially less power, which is great news for the environment and consumers wallets when it comes to electricity bills.
The screens excel in black levels and contrast, with the latest Sony television quoting a massive 1,000,000:1 contrast ratio (and no that's not a typo) compared to the highest LCD of 10,000:1. Since the tv's don't have a backlight, they don't have to block light out when not required and also produce black levels never seen before.
The displays also have superior picture quality with deeper and more lifelike colours, with a colour gamut exceeding that of NTSC standards and as OLED's every light is lit independently, they create light rather than blocking it as an lcd would. This means they can support almost perfect viewing angles up to 170 degrees!
The displays also dramatically enhance the viewing experience, coping with action and sports programmes better than any other tv and providing sharper frames that really pop out of the picture with refresh rates up to one thousand times that of an LCD.
Of course, organic led tv's do have some disadvantages, most notably their lifespan. Although they use very little power to operate, the blue organic phosphor part of the organic materials is quoted to have a lifespan of 7,000 hours, and hasn't been fully tested yet. This implies that the red and green phosphor may also have a short life too, but only time will tell.
The panels may also suffer from screen burn, which again is something to be fully tested; however, the effect is not expected to be as significant as on plasmas.
While OLED TV's are quite small and costly at the moment, they promise to become less expensive and much larger as the demand for them increases - just imagine rolling up your tv and bringing it over to a friends house! With all this potential there's no doubt that they're going to change the future of television, so get to a retailer and give one a try.
by: Dennis Howell
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