Can glorious rays of dawn and gentle light of the setting sun be seen in the long winter in the North Pole and Northern Europe? Can a cool cloudy day and the blue sky of northern countries be experienced indoor? Yes, there is a new lighting technology promising you the magnificent ambience only seen in science fictions!

NTHU Materials Science Professor Jwo-Huei Jou and his research team have successfully invented the world's first sunlight OLED (organic light emitting diode). Simple in structure, OLED can produce lights highly similar to that of the sun, and with just a slight change in voltage, you can experience different kinds of "sun-light"; 3000K for the light at sunrise, 2500K at sunset, 5500K at high noon on a sunny day, and with 8000K you will get the sun as seen in the blue sky of Northern Europe. This invention was widely reported in international journals and is currently applying for patent in Taiwan, the United States, Europe, Japan and Korea. Prof. Jou said that his team's paper on this innovation was immediately accepted by the internationally renowned journal Applied Physics Letter and published in 2009. The invention will change the history of lighting technologies by being able to produce "natural" light and color temperature close to that of the sun.

Since time ancient, man has attempted to light up the darkness or interior space through burning hydrocarbons such as torches, oil lamps and candles. About two hundred years ago, these methods will gradually replaced by electric lights such as incandescent bulbs, florescent light or the latest LEDs. However these lighting devices can only produce one color temperature and at times the color can be quite unnatural. Prof. Jou pointed out that these devices cannot meet the human need for natural sunlight and certainly are inadequate to produce light colors covering sunrise to sunset. His team's invention, however, promises to offer different colors of sunlight from sunrise, sunset, cloudy day to sunny day. It will drastically improve the quality of man-produced light. For regions that have long winter nights or suffers from inadequate sun exposure such as northern Europe, his invention is expected to greatly improve people's quality of life. In particular, regions that have a high suicide rate which is partially caused by the lack of sunlight will benefit from this new device. According to an eminent journal reviewer, the invention will prove to be valuable in many fields such as physics, engineering, lighting, photography, interior design to psychology.

"OLED is a hot item currently," said Prof. Jou, "because it produces plane-type light whereas the modern LED is only a point-type light source and florescent light a linear light source." In addition, unlike traditional light bulbs that emit heat, OLED produces a beautiful type of cool light. Moreover, OLED can be made on plastic film to be adhered onto any surface, much like wallpaper. Adding its feature as a natural light source, OLED will be the best choice for high quality lighting in the years to come. Prof. Jou and his research team's discovery will rewrite the history of lighting. It will generate unlimited opportunities in the OLED market.