Heating problems and influence in LED lighting

Introduction: LED with its small size, low power consumption, environmental protection, strong and durable, as well as rich color and other characteristics of the light source, favored by the majority of users. However, one of the current bottleneck in the development of LED lighting is facing the heat, this paper will analyze the problems in the process of heating and lighting effects on LED, which leads to the importance of cooling technology in LED lighting, and current and future cooling technology summary and analysis.

Heating problems and influence in LED lighting

1, LED lighting heating problems

In the process of using LED lighting, it is necessary to convert electrical energy into light energy as well as traditional lighting. However, in this two ways, no one can be completely converted into electric energy, and only minority part of the electrical energy into light energy, most of the remaining power (60% to 70%) in the process of LED lighting and lighting in turns into heat energy. Especially for LED devices and lighting power, as power increases, LED chip temperature will gradually rise, and the LED chip and other performance devices will decrease as the temperature rises, even failure. Eventually led to LED devices can not work. Fundamentally, the rise in junction temperature reduces the probability of PN junction recombination.

Performance in the light source is the brightness of the decline, resulting in saturation. Therefore, the problem of fever is an urgent problem to be solved in the development of LED.

2, the impact of heat on the LED

Mentioned in the above heat problems, heating problems will not only affect the life of LED devices, but also can affect the brightness of the light. It has been proved that the lifetime of LED, especially the high power LED, depends on the junction temperature of the chip. The lower the reliability, the shorter the working life. It needs not only from LED materials, production methods, packaging structure and light emitting principle and other aspects of the comprehensive design of LED devices, more important is to solve the existing problems of LED device and heat lamps, selection of cooling package structure, appropriate and reasonable, and applied to LED lighting.