A kind of testing method of csp LED with five-sided light emitting
A test method and surface emitting technology, applied in the testing field of five-sided emitting CSPLED, can solve the problem of inaccurate color temperature test of five-sided emitting CSPLED, and achieve the effect of improving test efficiency, reducing test cost, and reducing the process of rearrangement
Active Publication Date: 2021-10-22
ZHONGSHAN INST OF MODERN IND TECH SOUTH CHINA UNIV OF TECH +1
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Problems solved by technology
[0004] On the basis of the existing commercial fully automatic LED grain testing equipment, in order to solve the problem of inaccurate color temperature testing of five-sided luminescent CSP LEDs, improve the accuracy of sorting and improve the consistency of products, the purpose of the present invention is to provide a A kind of test method of CSP LED that emits light from five sides
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Embodiment
[0037] The present embodiment provides a kind of test method of CSP LED that emits light from five sides, such as figure 1 As shown, the method includes the following steps:
[0038] (1) Arrange the CSP LED 1 closely on the first white film 2, such as figure 2 As shown, a 5×5 first matrix is formed, and the distance between adjacent CSP LEDs 1 is 0.2 mm. The color temperature value of the CSP LED 1 on the first matrix is tested, that is, the first color temperature value. When the color temperature value at the time of layout is an individual color temperature value, and when the distance between adjacent CSP LEDs 1 is the first distance, the absolute value of the difference between the first color temperature value and the individual color temperature value is 1200K;
[0039] The CSP LED 1 is arranged on the first white film 2 , with the electrode 101 on the CSP LED 1 facing up, and the fluorescent adhesive layer of the CSP LED is in contact with the first white film 2 ...
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The invention discloses a method for testing CSP LEDs emitting from five sides. The method includes the following steps: (1) arrange the CSP LEDs on a white film, and test the color temperature value of the CSP LEDs, that is, the first color temperature value; (2) ) rearrange the CSP LEDs on the first matrix, and test the color temperature value of the CSP LED, that is, the second color temperature value; (3) use the second color temperature value as label data, construct the eigenvector with the first color temperature value, and the eigenvector Add label data to obtain a data set, and divide the data set into a test set and a training set; (4) Use the training set to train the random forest model, modify the trained random forest model to the test set to obtain the accuracy rate, and adjust the random forest according to the accuracy rate The parameters of the model, the parameters with the highest accuracy rate are taken as the parameters of the random forest model. The method of the invention solves the problem of inaccurate testing of the color temperature of the five-sided luminescent CSP LED.
Description
technical field [0001] The invention relates to the technical field of five-sided light-emitting CSP LED testing, in particular to a testing method for five-sided light-emitting CSP LEDs. Background technique [0002] CSP LEDs have the characteristics of five-sided light emission. In the process of industrial mass manufacturing, in order to improve the consistency of light and color of products, it is often necessary to test and sort them. files. However, in mass testing, the five-sided light-emitting CSP LEDs are closely arranged on the white film. When using the traditional LED die tester for testing, there is a problem of optical crosstalk between adjacent CSP LEDs, which causes the color temperature value of the CSP LED test It is not accurate, which seriously affects the sorting results, and further affects the light and color consistency of the product. At present, there is no fully automatic testing equipment for five-sided emitting CSP LEDs. If CSP LEDs are tested...
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IPC IPC(8): G01M11/02G01R31/26G01J5/60
CPCG01J5/60G01M11/02G01R31/2635
Inventor 王洪黄天来赖军
Owner ZHONGSHAN INST OF MODERN IND TECH SOUTH CHINA UNIV OF TECH