Recently, the Science and Technology Department of the Ministry of Industry and Information Technology has publicized 119 national standards for application and collected opinions. It is understood that the "LED accelerated life test method" as a national standard is expected to be introduced next year. It is expected that there will be 80 electronic industry standards and 39 communication industry standards such as digital cameras, radio frequency and communication cables.
Fill the gap in the LED industry
With the development of technology, the application of LEDs extends from traditional indoor and outdoor lighting to people's daily life. In the application, people find that LED products (especially high-power products) have high heat generation, long working hours and long life problems. Regarding how to predict the life of LED products, there is no uniform standard at home and abroad, and the standards adopted by enterprises are varied.
Based on this, the 13th Research Institute of China Electronics Technology Group Corporation (hereinafter referred to as the 13th) National Semiconductor Device Quality Supervision and Inspection Center applied for the establishment of the "LED Accelerated Life Test Method". According to Professor Zhang Wansheng of the thirteenth, some people in overseas believe that the life of white LEDs is unknown and unpredictable. After the LED product is added with phosphor, the life expectancy will change differently.
"The lifetime of a semiconductor device is a random value, but there is a range of changes, which is a statistical value." Zhang opposed this view. â€œAfter trial and error, we found that the addition of phosphors has little effect.â€
It is understood that the relevant standards for LED life test methods are still blank, and the methods of each organization are different. It is very important to refer to which standards to develop national standards. The thirteenth main reference is two, one is the life test and reliability evaluation method of the traditional semiconductor electronic device, and the other is the international LED life test method.
LED industry widely used LED
LCD TV backlight applications have driven the use of LEDs in broadband applications. US market research firm Strategies Unlimited expects the market for HBLED to reach $8.3 billion by 2010.
The security industry's contribution to this number is not a small number. It is understood that the application of LED in the security industry is mainly reflected in the security product display, such as large screen, LCD monitor, LED community information screen of Ping'an Community. LED product life issues have a large impact on the optimization of related security products.
The "LED Accelerated Life Test Method" can evaluate the reliability level of a product by performing various accelerated conditions in a laboratory to perform an accelerated life test. "Therefore, stipulation of appropriate life requirements, measurement and test methods is the primary condition for regulating the orderly competition of the industry. The formulation of this standard is of great significance for promoting the application of semiconductor lighting products and the industrialization of the industry in China."
Average life is the most commonly used reliability parameter for electronic components. Light-emitting diodes (LEDs) generally use the attenuation value of the light output as a criterion to obtain test data. The conventional method requires a long test time. The "LED Accelerated Life Test Method" standard provides a method for shortening the test time to obtain test data and a relatively simple data processing program.
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