Optimizing design to increase LED lamp life

LED market analysis data Shows that in 2011, the global LED market output value reached 16.6 billion US dollars, and the scale of the entire industry is still expanding. In the entire product system, more than 60% of production failures and more than 70% of market returns are caused by component failure, but most companies do not adopt a systematic electronic reliability engineering method to solve this problem, resulting in low product quality and short service life. China's electronic lighting industry is affected by many factors such as price, and there are obvious deficiencies in the design of extending the service life of products. In view of this, it can be foreseen that in the development of the LED industry, how to evaluate and improve the service life of LED products will become a new round of topics.

Service life becomes an important indicator

Using appropriate reliability engineering techniques for testing , evaluation, and improvement can increase product reliability by more than 10 times.

The service life of LED products mainly includes factors such as product quality and reliability, among which product reliability is the key factor affecting product service life. Reliability refers to the ability of a product to complete specified functions under specified conditions and within a specified time. The main reasons for poor product quality and reliability include low design level, lack of hardware application experience, lack of electronic reliability system engineering methods, etc. Practice has proved that the use of appropriate reliability engineering technology to test, evaluate and improve products can increase product reliability by more than 10 times, thereby extending the service life of products.

At present, many enterprises are constantly expanding their foreign markets and increasing exports to European countries and the United States while facing fierce domestic competition. The European Union and the United States have also issued many directives and standards for LED lighting . For example, the U.S. Department of Energy and the Environmental Protection Agency jointly issued the "Energy Star" decree, and the life requirement of integrated LED bulbs is to maintain at least 70% of the initial luminous flux after 25,000 hours of use . The North American Lighting Association has issued the LM-80-08 LED product standard, which regulates the test methods and clearly defines how to test the "rated lumen maintenance life" of products. In Europe, many assessment standards specifically for LED products are being formulated. The specific standards are as follows: the standards for lamp performance requirements are IEC 62722-1 and IEC 62722-2-1, the standards for LED module performance requirements are IEC 62717, the standards for self-ballasted LED bulb performance requirements are IEC 62612, and the standards for LED driver performance requirements are IEC/EN 62384. After these standards are officially promulgated and implemented, LED products will be subject to comprehensive assessment. In addition to the current safety requirements and energy efficiency requirements, performance requirements and product lifespan will also become important assessment indicators.

Optimized design has immediate effects

In order to improve reliability, extend product life, and comply with relevant domestic and foreign standards, some improvements can be made to LED products.

For enterprises themselves, in order to improve reliability, extend product life, and comply with relevant domestic and foreign standards, some improvements can be made to LED products. For example, lowering the temperature during product use can have an immediate effect on improving product reliability and extending product life.

In terms of heat dissipation, the traditional way is to add a heat sink. However, the optimized LED product in the figure is realized with the help of a conical shape design. First, because the cone can form a variety of "ventilation ducts", it helps the bulb transfer heat and achieve a heat dissipation effect. Secondly, the reasonable selection of components and the elimination of unqualified or prematurely failed products through testing can also help improve product reliability. In addition, reasonable process improvements can also help increase the service life of the product. Simply put, it is to reduce the stress on the component through a standardized and reasonable process flow, thereby enhancing product performance and improving the durability of LED products.

In general, improving product reliability can effectively improve the grade of products, produce higher cost performance, and create more economic benefits for enterprises. At the same time, fair and reliable certification of these products will increase the credibility of enterprises and help them enter the European and American markets more smoothly.