Design and Analysis of Light-Emitting Diode Driver Circuits
碩士 === 大葉大學 === 電機工程學系 === 96 === Light-Emitting Diode (LED) can be applied to the new lighting system. In this thesis, LED array driving circuits for the illumination light source using a single stage switching power structure are proposed. The switching power device structure adopts a forward conv...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2008
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| Online Access: | http://ndltd.ncl.edu.tw/handle/31445803530075622889 |
| Summary: | 碩士 === 大葉大學 === 電機工程學系 === 96 === Light-Emitting Diode (LED) can be applied to the new lighting system. In this thesis, LED array driving circuits for the illumination light source using a single stage switching power structure are proposed. The switching power device structure adopts a forward converter and a flyback converter by using fixed frequency current-mode Pulse Width Modulation (PWM) to reach output current and voltage steady. Experiments and discusses were focused on the effects of dimming frequency on the illumination of LED array. Both of the forward converter and flyback converter with different waveforms of output current were connected to the dimming circuit to change the dimming frequency in a fixed duty cycle.
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