Rapid detection of LED lamp life: step pressure accelerated test

With the rapid development of LED market, life assessment has become a focus of attention in the emerging lighting applications. Traditional thermal management is facing a big challenge: the traditional temperature test is not suitable for testing all lamps, which is urgent to establish an effective and fast life assessment method to support and promote the development of LED industry.

Dean of Guilin University of Electronic Technology, Professor Yang Daoguo in the 2012 China International Semiconductor Lighting Forum titled "rapid detection of LED lamp life: puttingforward pressure acceleration test report", the semiconductor industry usually has a reliability test method: continuous acceleration test. But this test is not very suitable for high reliability products, it must be designed to reduce the pressure step acceleration test, test time.

Professor Yang Daoguo proposed the accelerated step pressure test has several advantages: suitable for long-life products, short test time, test samples, test showed small reliability of LED product potential, second step pressure accelerated test research of LED products, some preliminary results achieved in the design of experiment based on. According to the experimental results, it can be concluded that the rapid life assessment method is suitable for LED products.

Because of internal testing, life and other aspects of different reliability testing has many challenges. The ladder pressure accelerated test is an effective method, has been carried out a preliminary test, I hope the future of the mold can also be tested, expect more results.

When it comes to effectiveness testing, Professor Yang Daoguo says there are several ways to reduce test time and reduce test cost. For example, each time system combination method to establish a complete system, comparing the simulation results with actual results, found in the section on temperature change mechanism.