Common LED light source splitting and color separation technology

In today's society, as LED application products, especially semiconductor lighting products, demand for high-power LEDs soar, the quality requirements for LEDs are also increasing:

Luminous flux bin

The luminous flux value is an indicator that LED users are very concerned about. LED application customers must know the range of LED luminous flux they use to ensure the uniformity and consistency of their brightness.

Reverse leakage current test

The reverse leakage current is lower than the required value when loading a certain voltage. In the production process, the LED reverse leakage current is too high due to static electricity, chip quality and other factors, which will cause great hidden dangers for LED application products. It is easy to cause LED dead lights after using for a period of time.

Forward voltage test

The range of forward voltage needs to be within the permissible range of circuit design. Many customers design to drive the LED to illuminate in a voltage mode. The magnitude of the forward voltage directly affects the change of the overall parameters of the circuit, which 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.

Relative color temperature bin

For white LED color temperature is a parameter used in the color industry to characterize it, this parameter can directly show whether the LED color is warmer or colder or more white.

Color coordinates x, y bin

For white light or monochromatic light, the chromaticity parameter can be used to express which color region the LED is in. Generally, four points x and y are required to determine a chromaticity region. A certain test must be used to ensure that the LED is within the required four-point x, y chromaticity area.

Main wavelength bin

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 the LED light.

Color rendering index

The color rendering index directly turns off the degree of discoloration of the object illuminated by the light onto the object. This parameter is very important for the LED lighting product .

In view of the above points, we can use a variety of schemes to effectively separate the color separation according to the actual situation. It can be automatically binned by a professional high-power LED splitting and separating machine. The efficiency is high and the speed is fast. It can be done for each LED. The color separation is a kind of manual control and binning from the measurement voltage to the leakage current to the luminous flux to the spectral multi-channel process.

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