Someone had rightly said “Incandescent light bulbs lit the 20th century; the 21st century will be lit by LED lamps.”
Though the transformation did not happen in a year, it started decades ago with the primary thought of bringing about a change. The scientist trio Isamu Akasaki, Hiroshi Amano and Shuji Nakamura developed the first blue LED light in 1993 which was the missing element from white LED light. For more than 30 years, Red, Green and yellow LED’s were much in use but with blue missing, white light went missing. This invention brought about the transformation in the lighting technology forever.
Blue LED came into picture just 20 years ago but then once the white light came into picture, it has brought about a change on a larger frame. It has not only helped people save electricity but also replace the older light sources with a more long lasting and efficient alternative.
Understanding the technology:
LED i.e. Light Emitting Diodes are tiny devices made up of semiconductor materials that convert electrical energy into visible wavelengths along with some heat when they are connected to an electric circuit. The small unit installed inside your LED lights, called the chip, comes in various sizes in order to fit into various light sources. This diode conducts the current in one direction and is formed by bringing together two layers made up of semiconducting materials:
N-type layer: N can be taken as negative, i.e. it has negative charge which can also be called electrons.
P-Type layer: P or positive charge explains this layer. Positive charge is carried in form of holes which are then filled up with electrons hence conducting the charge.
Where the electrons fall into the holes, is called the active region.
Why LED
Though the transformation did not happen in a year, it started decades ago with the primary thought of bringing about a change. The scientist trio Isamu Akasaki, Hiroshi Amano and Shuji Nakamura developed the first blue LED light in 1993 which was the missing element from white LED light. For more than 30 years, Red, Green and yellow LED’s were much in use but with blue missing, white light went missing. This invention brought about the transformation in the lighting technology forever.
Blue LED came into picture just 20 years ago but then once the white light came into picture, it has brought about a change on a larger frame. It has not only helped people save electricity but also replace the older light sources with a more long lasting and efficient alternative.
Understanding the technology:
LED i.e. Light Emitting Diodes are tiny devices made up of semiconductor materials that convert electrical energy into visible wavelengths along with some heat when they are connected to an electric circuit. The small unit installed inside your LED lights, called the chip, comes in various sizes in order to fit into various light sources. This diode conducts the current in one direction and is formed by bringing together two layers made up of semiconducting materials:
N-type layer: N can be taken as negative, i.e. it has negative charge which can also be called electrons.
P-Type layer: P or positive charge explains this layer. Positive charge is carried in form of holes which are then filled up with electrons hence conducting the charge.
Where the electrons fall into the holes, is called the active region.
Why LED
- Facts state that about one-fourth of the electricity produced in the world is consumed in lighting. For this high figure indicates that we need a resource like LED in order to conserve the resources.
- LED’s stand for convenience and efficiency.
- The rays which are emitted are mercury free making them harmless.
- The energy savings figures can reach up to 60-70%.
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