Analysis: performance indicators for high quality LED products

In recent years, the application of LED products especially semiconductor lighting products of high power LED demands more and more, while the LED quality requirements are increasingly high, which is mainly manifested in the following aspects:

1, positive voltage test: range of forward voltage in the circuit design of the license, many customers design of driving LED light to voltage power, positive voltage will directly affect the overall circuit parameters change, which will bring risks to product quality. In addition, some of the circuit power consumption requirements of the product, we want to ensure the same luminous efficiency, the lower the forward voltage the better.

2, the flux shift: flux value is an index of LED is very concerned about the user, LED application client must know the LED flux in which their use range, so as to ensure the uniformity and consistency of brightness of their products.

3, the reverse leakage current test: the reverse leakage current in the load voltage is lower than the requirements of a certain value, the production process caused by LED reverse leakage current is too high due to the electrostatic, chip quality and other factors, this will give the application of LED products buried great hidden danger, it is easy to cause after a period of use of LED dead lights.

4, the main wavelength profile: for monochromatic light LED, the main wavelength is an important indicator of its color parameters, the main wavelength directly reflects the visual perception of the LED light.

5, color index sub file: color index is directly related to the degree of light to the object on the color of the LED lighting products for this parameter is very important.

6, the relative color grading for white LED color is the representation of the color industry with a more parameter, this parameter can be directly showing a LED tone is warm or cold or white.