ELECTRICAL-OPTICAL PARAMETER TEST METHOD FOR LED LIGHTING PRODUCTION

摘要

LED lighting is well known as energy saving and eco-friendly light source technology, and it is widely believed that these features will make LEDs to be the dominant technology in lighting market eventually. However, the relative much higher price of LED lighting currently has become the obstacle for market adoption. Besides cost issues, specifications, quality, and reliability are also key factors for the market driving. Several standards have been published to provide the baseline of these key factors test and measurement. In IES LM-79, integrating sphere and goniophotometer methods are published to measure total luminous flux. However, the inconvenience of loading/unloading, the test time, and the size of the tools of both methods make it difficult to perform the test in production line, especially for larger DUTs, such as LED tubes. In this paper, an innovative method for total luminous measurement is proposed. It is able to improve test efficiency and keep quality consistently.