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Since ancient times, human beings have tried to light up the night or indoors. The lighting methods used to burn hydrocarbons like torches, lamp oils, and candles have been gradually driven by electricity like incandescent bulbs and fluorescent light 200 years ago. The lamp, or the nearest LED, was replaced; however, all artificial lighting tools showed only one color temperature, or the color was unnatural; the candle was 2000K, the incandescent bulb was 2700K, and the warm white fluorescent lamp was 2500~3000K. The cool white fluorescent lamp is 4500 K; the latest LED can cover 3000 to 6500K, but the lack of warm light of the setting sun, not to mention its glare and glare, the color is not soft, there are still many hidden concerns in indoor lighting.
Taiwan developed solar OLED called rewriting human history
The discovery of the research team of Qingda Zhou Zhuohui will rewrite the history of human lighting, adding infinite dream opportunities to OLED lighting with a value of 900 million US dollars (2010); the Nordic region is like Finland, although the national income is very High, many holidays, and a good social welfare system, but because of the lack of sunshine, alcoholism, depression, and even suicides are endless. The discovery and invention of Professor Zhou’s team will be the gospel of people with high or low latitudes. Depending on the OLED illumination, the human body's physiological clock will start up normally, giving people a healthier, "sunshine" hope.
Zhou Zhuohui pointed out that OLED is a flat light. Different from traditional light bulbs or modern LEDs, it is just a point light source, and fluorescent lamps are only line light sources. In addition, OLEDs are also beautiful cold light, unlike bulbs that generate heat, burn, and waste cold air power; It can be made on plastic sheets, so that the illumination source can be posted like a wallpaper, and the natural light source will make OLED the best choice for the ultimate high quality lighting target in the future.
Zhou Zhuohui pointed out that the huge output value and prospects of OLEDs deserve to be worked hard and pay attention. 
Taiwan's research and development of solar OLEDs said it can rewrite human history
In the Arctic and Northern Europe in the long night of winter, you can still see the dawn of the sunrise and the afterglow of the sunset. People are indoors, but they are outdoors. You can feel the coolness of the cloudy sky and the blue of the North. It will appear in science fiction. Wonderful scenery, the light products that humans have never dreamed of, this year, has begun to become possible; the research team of the director of the Department of Materials, Tsinghua University, Zhou Zhuohui, first invented in 2009, is also the first discovery, a simple organic light-emitting diode The body (OLED) can emit light color very close to daylight. Through simple voltage change, the color temperature change from 2300 to 8200K can be obtained, including 3000K for sunrise and 2500K for sunset. It also covers 5500K for sunny noon. 6,500K in the cloudy noon, even covered with the Nordic blue sky 8000K.