What are the development trends of high-power LEDs?
1. There is still a lot of room for high-power LED light efficiency improvement. LED light efficiency has surpassed the previous three generations of light sources, but it is still far from the theoretical high value, which means that it still has great potential for development. The internal quantum efficiency of LEDs can be very high, generally above 90%, but the external quantum efficiency is generally very low. If the external quantum efficiency can be greatly improved, the luminous efficiency of LED products can be greatly improved. This is one of the key research topics of led.
High power LED
In addition, when talking about the light efficiency of LED light sources, several concepts must be distinguished. The light efficiency achieved by the LED light source in the laboratory does not represent the light efficiency of the existing products. It also needs to solve a series of problems such as the production process before it can be turned into a batch product. So it represents the light effect of future products. Secondly, the light efficiency of low color rendering index products does not represent the light efficiency of high color rendering index products.
When some manufacturers promote their products, they say how many lumen watts the light efficiency of the product reaches, which is the value of the LED light source with a relatively low color rendering index, and the LED light source with a high color rendering index cannot reach the advertised value. In addition, the LED light source, the high color temperature light source is more efficient than the low color light source, and the 5600K LED is more efficient than the 3200K LED. Understanding these characteristics of led is convenient for the correct purchase of the required products.
2. Improving the color rendering index is one of the important topics of LED light source. In general, the higher the color rendering index, the lower the luminous efficiency; the higher the luminous efficiency, the lower the color rendering index. Some application fields, such as film and television, stage lighting, have high requirements on the color rendering index of the light source.
