OLED : The next LED Generation

As you know the LED's technology always develops, so the next step after the High Power and SMD LED 5050 or 3528 is the OLED =Organic LED.

What is OLED?

OLED stands for Organic Light Emitting Diode. The “organic” in OLED refers to organic material. Carbon is the basis of all organic matter. Examples of carbon-based substances include sugar, wood and the majority of plastics. The “LED” stands for “Light Emitting Diode” and describes the process of converting electric energy into light. There are two types of OLEDs small molecule OLED and polymer OLED.

What’s so great about OLED?

Blazing fast response times, wide viewing angles, exceptional color reproduction, outstanding Contrast levels, and high Brightness. The nature of its technology lends itself to extremely thin and lightweight designs along with the ability to use it in a variety of different applications. OLED is the holy grail of TV Displays technologies!

How does OLED work?

A Layer of organic material is sandwiched between two conductors (an anode and a cathode), which in turn are sandwiched between a glass top plate (seal) and a glass bottom plate (substrate). When electric Current is applied to the two conductors, a bright, electro-luminescent light is produced directly from the organic material.

How is color created?

OLED has more control over color expression because it only expresses pure colors when an electric Current stimulates the relevant Pixels. The OLED primary color matrix is arranged in red, green, and blue Pixels, which are mounted directly to a printed circuit board. Each individual OLED element is housed in a special “micro-cavity” structure designed to greatly reduce ambient light interference that also works to improve overall color Contrast.

The thickness of the organic Layer is adjusted to produce the strongest light for each of the colors ” red, green and blue – used to render the color picture. The three colors are further refined by a color filter, which purifies each color without the need for a polarizer, rendering outstanding color purity.

Organic light emitting diodes have been receiving a lot of attention over the world as a new type of display & Lighting technology. OLEDs have many advantages over conventional LED technologies. First, the fabrication process is easy, and devices are thinner and lighter than those fabricated by cathode ray tube .
Second, there are also some advantages over liquid crystal: OLEDS can be viewed from different angles and don’t need a backlight. Finally, the drive voltage and power consumption are low.

"The prerequisites for a breakthrough of this technology in the market, which is estimated in 2010 to be worth over USD 2 billion, are the optimization of certain critical performance data such as lifetime and efficiency. This requires innovations in materials meaning that chemistry will decide about the future and the success of the OLED technology. OLEDs – Organic Light-Emitting Diodes are the light of the future".