Nobel Prize in Physics 2014 was announced on 7/10, honored inventor of the light emitting diodes LED (Light Emitting Diode) blue, with the ability to create white light sources to save energy and brighter. Scientists Isamu Akasaki was named, Hiroshi Amano and Shuji Nakamura.

Invented blue LED has since the 1990s, is considered no small role in creating white light in a manner entirely new, beneficial to humans.

Time immemorial, humans have used fire to create light sources. Since the 19th century, the method used gas lamps became popular and then the light bulb Thomas Edison’s filament. Today, we have fluorescent lamps and compact fluorescent lamps (CFL). These technologies help more people get access to more light, while it is possible to save energy than before.Light up the world

LED is considered to be a generation of new lighting technologies. Compared to CFLs and incandescent bulbs, LEDs are more efficient turn 4 times and 15 times. Compared to fluorescent bulbs, which consume less energy and do not contain toxic mercury.

Not only save energy, these lamps have a lifespan lasts longer, about 30 times compared with incandescent bulbs. Many LED bulbs have a lifespan of 25,000 hours, or the equivalent of 17 years of use if used for 4 hours per day lighting.

Back in the 1980s, when emitting diodes can only be red and green, not enough light to illuminate a room. But just 10 years later, with the development of Nakamura blue LED based on previous studies of Akasaki and Amano, this combination can produce white light source several times more efficient.

Since then, LEDs become more common and more widespread application, from street lighting, traffic lights, on the computer screen or a smartphone. Announcement of the Royal Swedish Academy of Sciences said that this discovery marked the advent of technology can change the world

More than 1.5 billion people in the world today do not have access to the electricity grid. Since there is no electricity, many households still use firewood or gas for lighting. This is not only ineffective but even cause indoor air pollution and leading to death. A lack of it also makes it difficult for many children at school age.

LEDs typically have higher initial investment than other types of bulbs. However, its price is constantly being reduced over time and is expected to be widely applicable rates in poor countries. The use of LEDs can improve their quality of life.

By using LEDs, influenced by polluters lighting sources may be limited. Due to the low power requirements, the LED can be supported by solar power cheap. In the future, if the cost of increasingly cheaper, they can replace fluorescent lamps or incandescent lamps which are commonly used in Europe or America.According to the researchers, is active lighting energy consuming an estimated 17% of the electricity consumed in the US alone. Energy saving benefits that LEDs can offer particularly large in developing countries.

In theory, LEDs can generate a change to solve the energy problem. Most plan to reduce greenhouse gas emissions and promote energy efficiency in the US and Europe are conceivable that LEDs can change the current lighting technology for 2050.