The Study of LED Lighting Driver and Lighting Module Structure Optimization

• Main Authors: Wen-Chung Chang, 張文忠
• Other Authors: Fuh-Shyang Juang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/562h7f

碩士 === 國立虎尾科技大學 === 光電與材料科技研究所 === 101 === Lighting is the basic needs of human life, due to the recent rise of environmental awareness. Compared to the conventional lighting, light emitting diodes are more energy-efficient and low pollution. Many companies put into developing LED lamps, which will replace traditional lamps as light sources in the future. The study planning designs a high power-factor flyback converters. The design of the power supply used boundary conduction mode structures. The power switch has zero-current-switching characteristics, so the switching losses can be reduced. The output current of each LED series will not change along the output load. In order to improve the power-factor, we further use the power factors corrector IC composed of an active power factor correction circuit. The power factors at input voltage of 110Vac and 220Vac all reach above 0.95. And the conversion efficiency reach more than 80%. The study also tested the characteristics of LED devices, to substitute different types of plates and thermal materials. The best type of thermal module was found. The heat dissipation plate was bonded on the LED modules in the experiment. When LEDs emit light, the generated heat will be absorbed by the dissipation of heat conduction, and then transferred to the surrounding environment.