Led high power
Led, namely light emitting diode, is a kind of diode, which is characterized by emitting different colors of light when the current is conducted forward. High-power led is a kind of led. Compared with low-power led, high-power led has higher power, brighter brightness and higher price. The rated current of low-power led is 20mA, and the rated current higher than 20mA can basically be regarded as high power. General power numbers are: 0.25w, 0.5w, 1w, 3w, 5w, 8w, 10w and so on. The main brightness unit is lm (lumen), and the brightness unit of low power is generally mcd. These two units cannot be converted. At present, as a green, environmentally friendly and energy-saving new light source, it is widely used in car lights, flashlights, lamps and other places. ? The reason why high-power led is so called is mainly for low-power LED. At present, there are three classification criteria: The first one can be divided into 0.5W, 1W, 3W, 5W, 10W... 100W depending on the power and the total power of the packaged product. The second type can be divided into: large-size epoxy resin package, piranha epoxy resin package, aluminum substrate (MCPCB) package, to package, power SMD package, MCPCB integrated package and so on. The third type can be divided into low-light attenuation high-power products and non-low-light attenuation high-power products according to the degree of light attenuation. ? Of course, because there are many parameters of high-power LED itself, there will be different classification standards according to different parameters, so I won't go into details here. ? High-power LED is still a kind of LED packaging products, and it is the most important link for semiconductor lighting to move towards general lighting.
LED high power category
There are many kinds of high-power LEDs, such as high-power LED street lamps, high-power LED spotlights, high-power LED underwater lamps, high-power LED ceiling lamps, high-power LED wall washing lamps and high-power LED tunnel lamps. Among them, LED high-power street lamps and LED high-power wall washing lamps are the most widely used and popular. ? Heat dissipation and reliability are the main factors affecting the application of high-power LED? . The heat dissipation of LED packaging light source has always been a very important issue in the development of LED products, in which the thermal conductivity of product materials is very critical. Ceramic material is a kind of material with very good thermal conductivity, high thermal conductivity, good volume performance (no shrinkage or deformation) and good insulation and thermal conductivity. Therefore, the use of ceramic materials will be the mainstream trend of LED product development in the future.
disadvantaged
At present, the conversion efficiency of high-power white LED is still low, the luminous flux is small, and the cost is high. Therefore, the short-term application of high-power white LED is mainly special work lights in some special fields, and the medium and long-term goal can be general lighting fields.