LED lights, how much do you know?

LED (Light Emitting Diode) lighting is a kind of Lighting Fixture made of the fourth-generation green light source LED. LED is known as the fourth generation lighting source or green light source, has the characteristics of energy saving, environmental protection, long life, small size, etc., can be widely used in a variety of indication, display, decoration, backlight, general lighting and urban nightscapes and other fields. As early as half a century ago, humans had already studied the basic knowledge that semiconductor materials could generate light. The first commercial diode was produced in 1960. LED is the abbreviation of English light emitting diode (LED), its basic structure is an electroluminescent semiconductor material, placed on a leaded shelf, and then sealed with epoxy resin around to protect the internal core Role, so the LED lamp's seismic performance is good.

LED light source features

1. Voltage: The LED uses a low voltage power supply, and the power supply voltage is between 6-24V, which varies from product to product. Therefore, it is a safer power source than using a high voltage power supply, and is particularly suitable for use in public places.

2. Performance: 80% reduction in energy consumption compared to incandescent lamps with the same efficacy

3, Applicability: very small, each unit LED chip is a 3-5mm square, so it can be prepared into a variety of shapes of the device, and suitable for variable environment

4, stability: 100,000 hours, light decay is the initial 50%

5, response time: The incandescent lamp response time is milliseconds, LED lamp response time is nanoseconds

6, on the environmental pollution: no harmful metal mercury

7, color: change the current can be discolored, light-emitting diodes easily through chemical modification methods, adjust the energy band structure and band gap, to achieve multi-color red orange green blue light. If the LED is red at low current, it can turn orange, yellow and finally green as the current increases.

8, price: LED prices are more expensive, compared to incandescent lamps, the price of a few LEDs can be equivalent to the price of an incandescent lamp, and usually each set of signal lights need to be composed of 300 to 500 diodes.

At present, the use of LED lighting has been used for some time. It has been used in car lights, flashlights, etc., but it has not seen much application in street lighting and lighting. This may be the bottleneck with the current technology is not yet complete. Breakthroughs are related, although LED has many advantages, but there are obvious deficiencies in intensity, color temperature, and irradiation range. For example, its high light intensity but lack of strength, gives people a sense of bright dazzling, the light can not be compared with the fluorescent lamp, the scope of the radiation is too small.

Of course, these shortcomings should be improved in the near future, and they are still promising in some current application areas. This kind of lamp has received people's attention once it is launched. This is mainly due to the advantages it does not possess with all the traditional lighting fixtures: high efficiency and energy saving, cold light source, small size, light weight, low voltage safety, long service life, rich colors, low cost, and the most energy saving and environmental protection Safety requirements are one of the most promising and exciting green energy-saving devices. If a breakthrough is made in the above shortcomings, it will replace all traditional lighting equipment and cause a world revolution in lighting and energy saving.