In the 1960s, LED was developed by scientists and technologists based on the principle of semiconductor PN junctionLight-emitting diode。

At that time, LED was developed, the material used is GAASP, its luminous color is red. After nearly 30 years of development, we are very familiar with the LED, has been able to emit red, orange, yellow, green, blue and other color light. However, the use of white LED lighting only after the development of 2000 years, here to introduce the reader about lightingWhite LED。

The first LED light source based on semiconductor P-N junction was produced in the early 1960s. The material used at that time was GaAsP, which emitted red light (λp = 650nm) . The luminous flux was only a few thousandths of lumens when the driving current was 20 Ma. The corresponding luminous efficiency was about 0.1 lumens/W.

In the mid-1970s, the elements In and N were introduced to make LED produce green light (λp = 555nm) , yellow light (λp = 590nm) and orange light (λp = 610nm) .

By the early 1980s, Gaalas’LED light source had emerged, allowing red leds to see up to 10 times more effectively

Lumen/Valerie.

In the early 1990s, GaAlInP with red and yellow light and Gainn with green and blue light were successfully developed, which greatly improved the optical efficiency of LED.

In 2000, the former LED in the red and orange (λp = 615nm-RRB- light efficiency of 100 lumen/w, while the latter LED in the green (λp = 5-RRB-0nm) light efficiency of 5W.lumen/w.

Lighting memorabilia

Edison invented the electric lamp;

Fluorescent lamp (1938) ;

Halogen lamp (1959) ;

High pressure sodium lamp (1961) ;

1962 metal-halide lamp;

The first LED lamp (red) in 1969;

Green LED lamp, 1976;

Blue LED lamp 1993;

White LED lamp 1999;

Application of Foshan 2000led in indoor lighting.

The development of the Florida led is the second revolution following the 120-YEAR history of incandescent lighting.

At the beginning of the 21st century, LED, developed through a wonderful encounter between nature, human beings and science, will become an innovation in the light world, an essential green technology revolution in light for humanity.

Leds will be the beginning of a huge light revolution since Edison’s invention of the light bulb.

LED lighting is mainly high-power White LED single lamp, the world’s top three manufacturers of LED lighting quality guarantee for three years, large particles per watt is greater than or equal to 100 lumens, small particles per watt is greater than or equal to 110 lumens. Less than 3% per year for large particles and 3% per year for small particles.

Led Solar Street Light, LED projector, LED ceiling lamp and LED fluorescent lamp are all ready for mass production. For example, a 10 watt LED can replace a 40 watt conventional fluorescent lamp or a compact fluorescent lamp.

More and more LED energy-saving lights have entered ordinary people’s homes, but not yet popular!