| Summary: | 碩士 === 國立高雄應用科技大學 === 電機工程系博碩士班 === 101 === In recent years, due to rising awareness of energy saving around the world, LED has been widely used because of the advantages, such as small size, low energy consumption, high efficiency, long life, etc. Therefore, two different LEDs were used as the lighting source for desk lamp in this study. A single-stage flyback converter was employed to implement the driving source in which Primary-Side Sensing (PSS) technique was used to achieve the output voltage regulation, then a phase-shifted PWM method was adopted to regulate the luminance and color temperature. In order to reduce the circuit size and improve system performance, a Digital Signal Processor (DSP) is used to integrate the control of converter and dimming circuit. Finally, the prototype of the lamp circuit was tested, and the results are analyzed. The experimental results verify the feasibility of the system prototype.
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