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LED light color separation point

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In recent years, LED application products, especially the demand for high power LED semiconductor lighting products is more and more popular, the quality requirements of the LED is becoming more and more high, it is mainly manifested in the following aspects:

1. Forward voltage test: the scope of the forward voltage should be within the scope of the circuit design of the license, many clients design drive light-emitting tube light with battery voltage mode, forward voltage size will directly affect the whole circuit parameters, which can bring hidden trouble to the product quality. In addition, for some of the circuit power consumption have requirement of products, wants to ensure that the same luminous efficiency under the lower forward voltage, the better.

2. Flux step: luminous flux value is an indicator of LED users are very concerned about, LED application client must want to know what they are using the LED luminous flux in which range, so as to ensure that their products brightness uniformity and consistency.

3. Reverse leakage current test: reverse leakage current in the load under a certain voltage is lower than the required value, the production process caused by static electricity, the chip quality factors such as the LED reverse leakage flow is high, this will give great hidden trap LED application products, in use after a period of time is very easy to cause the LED light to death.

4. Dominant wavelength step: for monochromatic light LED, dominant wavelength is one of the important indicators to measure its color parameters, dominant wavelength directly reflect the human eye visual perception of the LED light.

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

6. Relative step: color temperature for white LED color temperature manifestations of its color is industry with more of a parameter, this parameter can be directly presented LED color slants warm or cold or white.

7. Chromaticity coordinates x, y step: for white or monochromatic light can be coloring product parameters which color to express the LED area, generally require 4 x, y, define a chromaticity areas. Must pass a certain test methods to ensure the LED whether fall of 4 x required, y chromaticity area.

In view of the above points, we can use two kinds of solutions for effective testing, a from the measured voltage to the leakage current to the luminous flux to the spectrum of multi-channel process coordinated controls the quality of a lot of artificial and step. One is through professional high-power LED testing machine can automatically divide class, high efficiency, fast speed, can be done for each LED spectral color separation.

Keywords for the information: LED light color

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