For general lighting, in terms of process structure, white LED light-emitting diodes are usually formed by two methods. The first is to use "blue technology" and phosphors to form white light; the second is a variety of monochromatic light mixing methods. Both of these methods have successfully produced white light devices.
The application prospect of white light LED light-emitting diode lighting new light source. In order to illustrate the characteristics of white LEDs, first look at the condition of the lighting source used. Incandescent lamps and halogen lamps have a luminous efficiency of 12~24 lumens/watt: fluorescent lamps and Hp lamps have a luminous efficiency of 50~120 lumens/watt. For white LED light-emitting diodes: In 1988, the luminous efficiency of white LEDs was only 5 lumens/watt, and by 198 it had reached 15 lumens/watt. This index was similar to ordinary household incandescent lamps, and in 200 years, white light LEDs emitted light. The light efficiency of the diode has reached 25 lumens/watt, which is similar to the tungsten halogen lamp. In 2012, the luminous efficiency of white LED light-emitting diodes has reached 120 lumens/watt, and white LED light-emitting diodes have begun to be popularized as lighting sources. It is estimated that by 2020, the light efficiency of LE is expected to reach 200 lumens/watt.
Although incandescent lamps and halogen tungsten lamps for general lighting are cheap, they have low luminous efficiency (the thermal effect of the lamp consumes nothing power), short life span and heavy maintenance workload. However, if white light LEDs are used for lighting, not only the luminous efficiency is high, but also the longevity Long (more than 10,000 hours of continuous working time), almost no maintenance. The German Hella company used white LEDs to develop aircraft reading lights: A street in the Australian capital Canberra has used white LEDs for street lighting: my country’s urban traffic management lights are also replacing early traffic order indicators with white LE light-emitting diodes. It is foreseeable that in the near future, white LED light-emitting diodes will enter the family to replace the existing lights.
LED light source has the advantages of using low-voltage power supply, low energy consumption, strong applicability, high stability, short response time, no pollution to the environment, multi-color luminescence, etc. Although the price is more expensive than existing lighting equipment, it is still considered to be it. Inevitably existing lighting devices.
High-power white LED light-emitting diode heat dissipation and life-span improvement design
High-power white LED light-emitting diodes are used in daily lighting applications. In fact, after environmental protection light sources have received increasing attention, they have become the primary choice for the development of environmental protection light sources. However, in fact, white LEDs still have many technical bottlenecks to be overcome. There are related improvement schemes to strengthen the design bottlenecks of white LED light-emitting diodes in terms of light-emitting uniformity, packaging material life, heat dissipation enhancement, etc. Improvement of function and performance.
