LED light splitting method

Abstract

An LED light splitting method comprises the following steps of firstly, primary screening, wherein LEDs at the same color temperature are screened out according to the X / Y value on a CIE1931 chromaticity diagram; and secondly, secondary screening, wherein spectrum charts of the LEDs at the same color temperature are guided out and then are compared with standard spectrum charts, and the spectrum charts with the similarity meeting the requirement are judged to be qualified products. In the first step, the same batch of LEDs at the same color temperature can be screened out; and in the second step, further screening is carried out, and the same batch of LEDs at the same color temperature and in the same emitted light color are screened out. The LED products with the higher consistency of parameters are finally obtained.

Description

technical field [0001] The invention relates to an LED spectroscopic method, in particular to sorting based on the same batch of LEDs with the same color temperature. Background technique [0002] Existing spectroscopic methods: just screen the X / Y value on the CIE1931 chromaticity diagram, and compare the X / Y value on the test chromaticity diagram with the standard X / Y value to determine whether it meets the requirements of the color temperature value. The color temperature value is tested, but in fact, at the same color temperature, due to the difference in other parameters of the chip and phosphor, the color will also be different. Therefore, in the same batch of LEDs with the same color temperature, the luminous color may be different, mainly reflected Differences in LED spectrum graphs, such as figure 1 shown. For some occasions that require high consistency of LED light emission, the current spectroscopic method obviously cannot meet the requirements. Contents of t...

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Problems solved by technology

[0002] Existing spectroscopic methods: just screen the X / Y value on the CIE1931 chromaticity diagram, and compare the X / Y value on the test chromaticity diagram with the standard X / Y value to determine whether it meets the requirements of the color temperature value. The color temperature value is tested, but in fact, at the same color temperature, due to the difference in other parameters of the chip and phosphor, the color will also be different. Therefore, in the same batch of LEDs with the same color temperature, the luminous color may be different, mainly reflected Differences in LED spectrum graphs, such as figure 1 shown

For some occasions that require high consistency of LED light emission, the current spectroscopic method obviously cannot meet the requirements

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