Active matrix organic light-emitting diode (AMOLED) displays have been available on high-end smartphones for a while now, and there has been a lot of speculation about when we’ll start to see tablet devices equipped the same screen technology. I would like to take a closer look at why AMOLED technology is so hotly anticipated.
OLED displays use an alternative pixel-lighting mechanism compared to liquid crystal display (LCD) - a mechanism that is simpler in concept and offers advantages over LCD, but introduces numerous technological challenges that display manufacturers are working to overcome.
A lot more news has been published recently about large LED wafer production. LEDs Magazine reported that Philips Lumileds and Lextar Electronics are now running production on 150-mm wafers and that there is another un-named Asian company using 150-mm sapphire wafers supplied by Rubicon Technology. Rubicon also recently announced the availability of 300-mm Sapphire wafers for LED production. All this makes me think that this is only the first wave in what will be a deluge of announcements for large wafer size production in LED.
These announcements got me thinking about the technology that will be required to support production on these larger size wafers. Is there something small wafer manufacturers can leverage to derive some of the benefits of the larger wafers before they actually transition to these in their factories?
Light emitting diodes (LEDs) look great. They have a long lifetime. They are environmentally benign. And if that weren’t enough, LEDs used for displays and illumination save serious amounts of energy compared to the incumbent technology they aim to replace.
LEDs consume so much less energy that governments around the world are phasing out the use of incandescent bulbs. The implication of this is huge for energy savings. A new report released by the Department of Energy analyzed market segments where LEDs are competing or are poised to compete with traditional light sources (e.g., incandescent and fluorescent) for general illumination applications, outdoor lighting, and consumer electronic displays. The report findings include the following powerful statistics:
There are many prestigious prizes which institutions and academics award to honor people for their exceptional efforts or accomplishments that benefit science, academia or even mankind. And many of them are not well known yet.
On the 100th anniversary of Edison’s tungsten bulb, alternative lighting methods that use less energy and reduce pollution are gaining ground. Fluorescent (FL) or compact fluorescent (CFL) bulbs save energy but also have drawbacks such as unnatural color that may not be pleasing to the eye or in the case of CFL bulbs in particular, they may not fit in recessed lighting fixtures. And perhaps the most important issue, both FL and CFL bulbs contain mercury, requiring special handling for bulb disposal after use.
On the horizon is a promising new technology, Light Emitting Diode (LED) devices that can provide a good replacement.
Solid state (light emitting diode, known as LEDs) street lights, an energy saving device for water heaters, more efficient elevators, and a massaging mouse won top honors at this year’s Future Science Star competition in Shanghai, China.
As countries look for ways to reduce their carbon footprints, lighting, which uses nearly 20% of the world’s energy, has become a key target — and increasingly solid state lighting (both LED and OLED-based) is being explored as an energy-efficient answer.
We’ve all heard about LEDs, but what about OLEDs? Both generate light using semiconductor technology, use less energy and are typically longer lasting than the incandescent or gas filled bulbs they are slated to replace: but that is where the resemblance stops.
The United States Government's Department of Energy (DOE) is running a contest, named the L Prize, to reward the first organization to design and develop an energy efficient LED bulb. A recent article in the New York Times describes both the contest and the recent submission from lighting giant Philips. The prize for a replacement 60 watt bulb is $10 million dollars and for a replacement reflector flood lamp it's $5 million dollars.
Long the symbol of a good idea, tungsten (also known as wolfram – but that’s another story) light bulbs have been deemed a bad idea by the European Union. As of today the EU has officially banned the sale of frosted tungsten light bulbs with the idea of moving to more energy efficient lighting. Also, clear bulbs over 100W must be transitioned to more efficient types by 2012.