Detailed explanation of seven commonly used and effective LED light source spectrophotometry and color separation technologies

In today's society, with the rapid increase in demand for high-power LEDs in LED application products, especially semiconductor lighting products, the quality requirements for LEDs are also getting higher and higher:

1. Luminous flux classification: Luminous flux value is an indicator that LED users are very concerned about. LED application customers must know the range of the LED luminous flux they use, so as to ensure the uniformity and consistency of the brightness of their products.

2. Reverse leakage current test: The reverse leakage current should be lower than the required value when a certain voltage is loaded. During the production process, factors such as static electricity and chip quality may cause the LED reverse leakage current to be too high, which will pose a great hidden danger to LED application products and easily cause LED dead light after a period of use.

3. Forward voltage test: The forward voltage range must be within the permitted range of the circuit design. Many customers design the drive light-emitting tube to light up in the form of voltage. The forward voltage will directly affect the change of the overall circuit parameters, thus bringing hidden dangers to product quality. In addition, for some products with requirements for circuit power consumption, it is hoped that the lower the forward voltage is, the better under the same luminous efficiency.

4. Relative color temperature classification: For white light LED, color temperature is a parameter that is used more frequently in the industry to characterize its color. This parameter can directly show whether the LED color tone is warm, cool or pure white.

5. Chromaticity coordinates x, y binning: For white light or monochromatic light, chromaticity parameters can be used to express which color region the LED is in. Generally, four points x, y are required to determine a chromaticity region. Certain testing methods must be used to ensure that the LED falls within the required four-point x, y chromaticity region.

6. Dominant wavelength classification: For monochromatic LEDs , the dominant wavelength is an important indicator for measuring its color parameters. The dominant wavelength directly reflects the human eye's visual perception of LED light.

7. Color rendering index classification: The color rendering index is directly related to the degree of color change of an object when light shines on it. This parameter is very important for LED lighting products.

In view of the above points, we can adopt a variety of solutions for effective spectrophotometry and color separation according to actual conditions. We can use professional high-power LED spectrophotometry and color separation machines for automatic grading, which is efficient and fast. We can do spectrophotometry and color separation for each LED. One is to measure voltage, leakage current, luminous flux, spectrum and other processes with a large number of manual efforts for quality control and grading.