LED color screen substrate electric performance test method

Abstract

The invention provides an LED color screen substrate electric performance test method. The LED color screen substrate network is split and the electric performance of different networks is tested in batches so that the objective that different test area data are combined to judge the electric performance of the test product. Compared with the methods in the prior art, the beneficial effects are that the difficulties of insufficient equipment test capacity and insufficient arrangement space for the test mould manufacturing columns of the electric performance test of the LED color screen substrate manufacturers can be solved so that the method is suitable for high density lamp PAD and the product of hundreds of thousands of test points, high equipment purchasing fund can be saved for the LEDcolor screen substrate manufacturers and the present equipment resources and technical methods can be reasonably utilized.

Description

technical field [0001] The invention relates to a method for testing the electrical performance of a circuit board, in particular to a method for testing the electrical performance of an LED color screen substrate. Background technique [0002] LED color screen substrate is the carrier of LED color display electrical properties and lamp beads. After the development of single-color, two-color graphic display and color image display, LED color display has become an important symbol of urban lighting, modernization and informatization. [0003] The LED color screen substrate is an important part of the LED color display screen. At present, the production process of the LED color screen substrate has the following characteristics: first-order or second-order HDI design, high-density integration, and complicated process flow; light PAD is dense, and the minimum pitch is only 2.5mm; wiring The network is large, and there are tens of thousands or even hundreds of thousands of test ...

AI Technical Summary

Problems solved by technology

For the automatic universal testing machine, the maximum number of test points is 380928, the density is 40mil, the installation / replacement of the test frame is efficient, and the production cost of the test frame is low, but the equipment purchase is expensive and the cost is high, and it is difficult for enterprises to afford hundreds of thousands of test equipment. ;For the special testing machine, the maximum number of test points is 16384, which has the problems of low efficiency of installing / replacing the test frame and high cost of test frame manufacturing; the problem of low production efficiency of the flying probe test is only suitable for sample testing

[0005] Due to the parallel wiring of the LED light board, there are tens of thousands to more than one hundred thousand test points on a single PCS, which exceeds the maximum point capacity of the tester; The setting space of the pillars needs to be at least 4.5mm, so a set of fixtures cannot complete the test, the electrical test is difficult, and it is easy to miss the test

To sum up, due to the characteristics of LED color screen substrates and the technical constraints of testing machine testing capabilities and test racks, conventional equipment cannot complete the entire network electrical performance test for LED color screen substrates at one time, and it is difficult to evaluate the quality of LED color screen substrates.

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