High power LED adoption of the "bottleneck": heat issues

According to the Taiwan LED industry sources said, with LED in high brightness backlight panel, such as a laptop or LCD TV, but postponed due to overheating problems. In order to minimize the temperature from the panel backlight module, LED packaging company to a variety of solutions to reduce the heat as much as possible, but the cost of materials with the improvement of thermal management and inevitably improve the.

Due to technical requirements and cost, LED before the fourth quarter of 2006 will not penetrate the notebook market, while the increase in the large size LCD TV will be later in the second quarter of 2007, this reasoning is an article on June 15th in Taiwan, LED said, the largest packaging company photoelectron billion chairman Robert Yeh said in the second half of 2007, the company plans to supply for white LED notebook and larger size LCD tv. Ching-Cherng Sun in Chinese microelectronics Journal said, increasing the efficiency of high power LED police and is considered the future to replace the lighting source CCFL. For example, Japanese companies now have the ability to produce up to 70 lumens per Watt High Power LED, while the domestic LED packaging and testing company can only produce a high power LED 40 lumens per watt. However, the problem of heat dissipation is the main obstacle in the development of LED lighting as objects, using ceramic or heat pipe is an effective method to prevent overheating, but the heat management solutions of the material cost increase to thermal management of high power LED is designed to effectively reduce the heat resistance between the chip to the final product, packaging. The shell (R junction-to-case) is one of the material solutions provide low thermal resistance but high conductivity, outside through the chip attachment or hot metal to heat transfer directly from the chip to the package shell. Billion light company unveiled a consists of 84 LED to 37.4 lumens per watt and power consumption of 4.85A LED in the 2006 LED exhibition lighting lamps. According to the company, LED street lights integrated a "U shaped" circuit design to minimize thermal problems. The company declined to give further explanation of the solution, but said the thermal management circuit was developed and patented by a company. Although using LED notebook market and TV in the future is more conservative, LED manufacturers in Taiwan is optimistic about 7 inches from the panel backlight applications. Based on the traditional and LED lighting solutions for the price of a shrinking for 7 inch panel backlight application module, cold cathode fluorescent lamp with a converter cost about NT $NT$150, based on the cost of the backlight module contains 30 white LED about NT $NT$180.