In recent years, LED application products, especially semiconductor lighting products, are increasingly demanding for high-power LEDs, and at the same time, the quality requirements for LEDs are becoming higher and higher, which are mainly manifested in the following aspects:
1. Forward voltage test: The range of forward voltage needs to be within the allowable range of circuit design. Many customers design to drive the LED to illuminate in a voltage mode. The forward voltage directly affects the change of the overall parameters of the circuit. Will bring hidden dangers to product quality. In addition, for some products that require power consumption of the circuit, it is desirable to ensure that the forward voltage is as low as possible under the same luminous efficiency.
2. Luminous flux binning: Luminous flux value is an indicator that LED users are very concerned about. LED application customers must know which range of LED light flux they use, so as to ensure the uniformity and consistency of their product brightness.
3, reverse leakage current test: reverse leakage current is lower than the required value when loading a certain voltage, the LED reverse leakage current is too high due to static electricity, chip quality and other factors in the production process, which will be applied to LED The product has a great hidden danger, and it is easy to cause LED dead lights after using for a period of time.
4, the main wavelength bin: For monochromatic LED, the main wavelength is an important indicator to measure its color parameters, the main wavelength directly reflects the human eye's visual perception of the LED light.
5, color rendering index binning: color rendering index is directly related to the degree of discoloration of light on the object on the object, this parameter is very important for LED lighting products.
6. Relative color temperature binning: For white LED color temperature is a parameter used to characterize its color industry. This parameter can directly show whether the LED color is warmer or colder or more white.
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