Kitchen lighting new time along the colorful world of LED

LED lighting history

The earliest application of semiconductor P-N junction LED light source principle introduced in early 1960s. At that time the material used is GaAsP, red (lambda p=650nm), in the drive current of 20 mA, luminous flux is only a few lumens, the corresponding luminous efficiency of about 0.1 lumens / watt. In the mid 70s, the introduction of elements In and N, enabling LED to produce green light (lambda p=555nm), yellow light (lambda p=590nm) and orange light (lambda p=610nm), light efficiency also increased to 1 lumens / watt.

At the beginning of the 80s, the LED GaAlAs light source, the red light effect LED reach 10 LM / W.

In early 90s, the successful development of red, yellow, blue and green GaAlInP GaInN two new materials, so that the optical efficiency of LED is improved greatly. In 2000, the former made of LED in the red, orange area (lambda p=615nm) of the optical efficiency of 100 lumens / watt, while the latter made of LED in the green area (lambda p=530nm) of the light effect can reach 50 lumens / watt.

Application of monochromatic light LED

Used for the first LED light source instrument, but all kinds of light colored LED has been widely used in traffic lights and large screen, resulting in good economic and social benefits. In 12 inches of red traffic lights, for example, in the United States was originally a long life, low light efficiency of the 140 watt incandescent lamp as a light source, it produces a white light of 2000 lumens. After the red filter, the light loss of 90%, leaving only the red light of 200 lumens. In the new design of the lamp, Lumileds uses 18 red LED light source, including circuit losses, including a total power consumption of 14 watts, can produce the same light effect.

LED series lighting has the following characteristics: 1, high purity, bright and rich colors. At present, LED products almost cover the whole visible spectrum range, and the color purity is high. And the traditional way to get the color light is the incandescent lamp plus filter, greatly reducing the light effect; 2, super long life. LED the actual life of more than 50 thousand hours, for a few times or even several times the general light source; 3, there is no mercury in the light source, the beam does not contain uv. LED is a solid light source, green environmental protection, especially suitable for perfume shops, jewelry stores, museums, art galleries and other places of professional, can meet the special requirements of lighting display of goods; 4, solid state lighting, good anti-seismic performance, stable and reliable; 5, energy saving, economy, maintenance free; 6, dynamic color control light and shade, adjustable, change three color LED color combination can be realized by PWM; 7, LED has strong luminous direction, high utilization rate of luminous flux, and has the advantages of small volume, easy to LED lighting design and light distribution control; 8, LED can be used to direct current low voltage power supply, safe and reliable; 9, LED is not affected by the starting temperature limits can be instantaneous start, a few MS, and can achieve instantaneous luminous flux output.

LED Home Furnishing in the product is very small, by the power constraints, is also in the decoration of the main products. Home lighting products are the world's LED industry goals. There are already some products. For example, light all LED cabinet lamp.

Source: China Kitchen & Bath Online