Organic,LED,and,Its,Potentials technology Organic LED and Its Potentials in Lighting

The electronic cigarette is not new. People who buy electronic cigarette knows that this product has been in the market for years now. Despite some sectors apparently trying to shoot the product down from the shelves, the popularity of elect Active shredder safety technology for the small office. Shreds 15sheets per pass into 5/32" x 1-1/2" cross-cut particles (Security Level3). Patented SafeSense® Technology stops shredding when hands touch thepaper opening. Designated shredde

Every week LEDcentre.uk.com tries toprovide some new information on LED lighting, and we haven’t mentioned OLEDs(Organic Light Emitting Devices), which are creeping into our everyday lives,even if we don’t hear this term mentioned too often. OLEDs are not primarilyused as lighting devices, but rather as displays. For their use as a mainsource of lighting further improvements are necessary. But how is OLEDdifferent from a simple LED? OLEDs are organic light emitting diodes, so their components includeorganic substances which emit light once current runs through them. They can beeither mono-layered or more often multi-layered, and also contain a usually transparentcathode and anode at the two ends for transporting current.  Organic LEDs are, basically the futuristic way of lighting, andtheir range of application widens continuously. The reason for their popularityis due to their exclusive features, which can be used advantageously not onlyin the lighting industry, but at the moment primarily in manufacturing displaysof all forms (TVs, mobiles, adverts). These displays may contain PMOLED orpassing matrix addressing schemes or AMOLEDs – active matrix schemes. AMOLEDSwith film transistor backplanes make it possible to switch or address eachpixel individually, in other words touch screen.  Other advantages include its very small size, as OLEDs are layeredon a thin film, or other paper-thin sheets. They are also very light due tothis, with the flexibility of plastic substances. Beside the physical features,the displayed images on OLED have a higher brightness, better power efficiencyin general, and a wide viewing angle. OLED displays are generally brighter withmore lively (sometimes even considered unnatural) sharpness and liveliness ofthe colours. Also, these panels do not require back lighting, as previousside-lighted or back-lit panels, so black colours can be fully displayed onthem, as perfect solution for advertising panels.  On the other hand, OLED technology is still in its infancy, and newsolutions appear on the market constantly. There are plenty of issues that needresearch for it to become a reliable, long-term solution for either lighting ordisplays. One of its disadvantages is its rather short lifespan. Blue OLEDcomponents only have the lifetime of 14 000 hours, which is about 8 years withregular use of the display. This is too little compared to current solutionsavailable on the market (LED, LCD), and more expensive as well. Also, sinceblue components lose their lifespan faster than other components, theirvisibility is a difficulty. Blue light is more difficult to detect by the humaneye, so they need to be generally more powerful. The problem has been solved sofar with optimizing the colour ratio within a pixel, to balance out thedifferences in lifespan. Also blue light is set as more intensive, oftenresulting in an artificial-looking picture on the display. Further issues canbe water resistance (as OLEDs are ruined by water instantly, so their outdoorperformance hugely depends on the construction’s IP rating); the high powerconsumption of white light displays; or screen burn-in, which can happen due tothe differing lifespan of the colours.  Naturally what we are primarily interested in is the technology’sapplication for lighting purposes. This application of OLEDs has only started, sincethe generally low performance of these diodes and their current short lifespanprevents manufacturers to use it as a main source of lighting. Also, themanufacturing of OLEDs has just started in larger amounts, which will hopefullylead to a reduction of its price. Demand for organic LEDs is growingconstantly, due to additional applications by mobile phone companies anddisplay manufacturers.  As for lighting, OLED as a new form of lighting offers entirely newsolutions. Since OLEDs could even be printed on a sheet of paper even, they arerecently applied as wallpaper with background lighting. Its transparency allowsit to be used as window during daytime and source of light as a panel duringthe night. Novaled OLED panels bear a 60-70% transparency. For commercial purposes the first product was the round Orbeos OLEDpanel by Osram in November 2009. Although due to the current problems withthese applications we will still have to wait until OLED becomes a competitivelighting source, its generally peculiar features and the new solutions theyallow will bring new light to our homes.