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ஞாயிறு, ஏப்ரல் 08, 2012

Everything About OLED TV

Everything About OLED TV

OLED (Organic Light-Emitting Diodes) is the latest and the most advanced technology which you will see in future televisions. OLED is one of the most highly developed TV technologies which we have seen in the last few decades. At this year’s CES (Consumer Electronic Show), LG and Samsung both revealed upcoming TV models with this technology. Read on to know more about the next-gen television screen.


 What is OLED?



A TV image is made of three basic color beams - red, green, and blue light. Our present LCD screens use color filters and light-blocking liquid crystals above a light-creating backlight to create these three basic light beams. And the Plasma screens use UV light created by igniting pockets of gas to excite red, green, and blue phosphors.
 
So what OLED do? It does its job by passing electricity through certain materials that glow these specific colors and this method gives the greatest clarity you can ever imagine on a glass screen. So what are these materials and how does it work! Read on.
 
Why OLED?
 


OLED makes each pixel shut off which gives absolute black and no other TV technology does this. When OLED TV makers say that their screens will give ‘actual infinite contrast ratio’ they are actually telling the truth, don’t take it as a marketing hype.

This technology will makes TVs more efficient and better performing for sure and above this it will also make them thin and lightweight. The LG 55-inch OLED TV showcased at CES was only a pencil think (3/16 of an inch) and weighed just 7.5kg. 


The next-gen OLED TVs will be a like a dream box with hard to believe contrast, impossibly thin and very energy efficient features.

 
How Different is OLED?

 
All the current ‘LED TVs’ are not actually LED TVs, they are just LCD TVs that use LEDs for backlight. The LED lit LCD screens are more energy efficient that LCD and Plasma, but you can’t even think of comparing them with the energy efficiency of OLED.

At CES Sony unveiled a concept of Crystal LED, which you can call as real LED. But this technology is still a prototype and the wait will be long to see thing technology in real.  


LED TVs uses carbon materials to create light when supplied with current, which means they are like tiny light bulbs. On the other hand OLEDs are light-emitting areas or surfaces which don’t use any ‘organic’ material like carbon to produce light.

 
Types of OLED!


For now OLED can be classified under two categories - RGB OLED and ‘White’ OLED. The RGB OLED functions similar to Plasma technology with separate red, green, and blue OLED subpixels.

The ‘White’ OLED is the interesting thing to know; it is very different from its brother and a bit complicated too.  In the ‘White’ OLED, the red, green, and blue OLED materials are clubbed together to generate a white light when power passes through. The generated white light then passes through a color filter to create the three basic color beams.

 
It’s a bit confusing right? You might be thinking why to make white light from three colors and then again remake the same three colors from the white light. But it seems like this new method has longer life and there is less chance of color shift. And the most important part is, it is easier to manufacture and therefore will be cheap.
 
AMOLED vs. OLED


All the new smart-devices which you see in the market boast of AMOLED display and not of OLED display. The extra ‘AM’ stands for ‘active matrix’, which is just a different way of running an OLED screen. The ‘active matrix’ method visualizes better motion, the reason being each pixel concentrated individually. This method is very important for TVs as their main purpose is to play motions (videos).

During the starting era of LCD TV they used come with a special tag - TFT LCD or active-matrix LCD. Same applies on OLED TV also, whether they mention or not all OLED TV will work on some kind active matrix.

 
When, for How Much?


Any new technology that hits the market will be pricy for some time. And more over consumer electronics makers have the habit of following the skimming or creaming pricing strategy to break even and after which they tend to shed down the prices. Let the elite 1 percentage shed their bucks at the initial years of launch and after that you can think of stepping up to OLED TVS which might have become reasonable eventually. 

For now if you want an example of how OLEDs look like, check out the latest Samsung and HTC smartphones. Even the new Sony PlayStation Vita comes with 5-inch OLED screen


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