What is OLED? – The Next Digital Display Ruler
What is OLED? OLED generally stands for Organic Light Emitting Diode and is the newest technology in the lively digital display market which produces digital images in a seamless fashion. Personally, I would strongly believe that this OLED will be the viable alternative and supersede all the current display technology. And so, let’s dig the hole and find out..
The Features and Technology of OLED
As the name implies, OLED is composed of a thin film of organic molecules which is sandwiched between 2 electrodes and laid on a glass. Put simply, this OLED organic film would emit light when it is subjected to electrical current and the light’s color would depend on the combination of different molecule combinations. Therefore, it has limitless color variation.
Here’s another OLED explanation by KODAK:
“OLED displays stack up several thin layers of materials. They operate on the attraction between positively and negatively charged particles. When voltage is applied, one layer becomes negatively charged relative to another transparent layer. As energy passes from the negatively charged (cathode) layer to the other (anode) layer, it stimulates organic material between the two, which emits light visible through an outermost layer of glass.”
The Drawback of OLED
OLEDs aren’t perfect. The major problem with OLED technology based displays has been the lifetime of the organic materials. As with every display type, after a certain time of usage, OLED started to dim. At the beginning, the displays reached half-brightness after only a few hundred hours.
Researchers have found out that the blue organic phosphor OLED has a short life (a guess is 7,000 hours) and the red and green material may not last much longer. They also believe that the blue organic phosphor OLED is the most difficult OLED’s color to make.
However, there has been constant progress, and today this is almost not a matter of concern. In fact, the scientist has boosted up the life time of an OLED to 50,000 hours or more and is improving still.
AMOLED and PMOLED
Many people would say there are two types of OLED, that is AMOLED and PMOLED. In fact, there is only 1 type of OLED, that is OLED. The Active-Matrix and Passive-Matrix are just the delivering method of OLED.
The first OLED products in the market used PMOLED – these were MP3 players, sub-displays on cell phones and radio decks for automobiles. PMOLED screens are easy and cheap to produce but have a high relatively energy consumption and are only useful for small screens ( up to 3 inches).
For larger displays, AMOLED is the best technology, and is growing much more quickly than PMOLED displays. Despite AMOLED are more expensive, and much more difficult to create, it can be used for larger displays (current prototypes are up to 40 inch and are very power efficient.
OLED vs (LED and LCD) TV
First of all, LED is just another type of LED screen anyway, which uses LED as the backlight rather than fluorescent. So, it’s not really a big leap of technology advancement for this.
Contrarily, OLED has a different story and technology attributes compared to LED and LCD. The major difference is OLED required no backlight and no extra cooling or heating system, and so it consumes relatively less power. As OLED materials have the capacity to support full spectrum of visible light, so there will be higher contrast and it has high-speed refresh rates. Nonetheless, OLED has larger viewing angle, more flexible and for near-eye applications, it provides more pleasant viewing without distortion.
If you think OLED is limited to TV market only, then you’re definitely wrong. In fact, OLED has invaded to different kind of products such as mobile phone, digital camera, AV or MP3 player, watches, wallpapers, various digital gadgets and more.
Here’re some of the examples:
OLED Revenue Forecast:
Other OLED Reference Links: