- 學位論文
具保護功能之非線性可調光LED驅動器研製
The design of LED driving system with nonlinear dimming control and protection functions.
摘要
摘要 本論文主旨在於設計與研製具保護功能的非線性可調光發光二極體之驅動器，其保護功能可在發光二極體負載發生開路或短路異常時，保護驅動器本身，並可於異常狀況解除後，自動回復驅動器的動作。驅動器採用雙級式架構，前級為單級返馳式的功因修正架構，後級為具可調光功能的降壓式電路。調光方式採用不同以往的非線性調光方式，使亮度在調光變化時，較能達到視覺上柔順平滑的感覺，而調光控制的方法，則利用手機上的應用軟體，透過藍芽傳輸，來達到以無線的方式控制調光功能。 最後本文以36W的發光二極體(8串80並組成)來研製具保護功能之驅動器，並加入非線性調光功能及結合藍芽技術進行無線遙控。實驗結果顯示，其輸入電壓範圍可達AC 90V~240V，功因為0.92以上，效率亦可在82%以上，且符合預期的保護功能機制及遠端調光控制方式。
並列摘要
Abstract The purpose of this thesis is the design of a LED driving system with nonlinear dimming control and protection functions. The protection function can protect the LED driver while the LED short circuit or open circuit faults occur. And it can automatically restart after the abnormal situations (LED short circuit or open circuit) are removed. This design uses a two stage converter.The first stage is a single stage flyback PFC (Power- Factor- Correcton) converter, and the second stage is a buck converter, which has the dimming function. The dimming control can change the brightness more smoothly by using nonlinear dimming curve for adjustment, this function can also be executed by smart phone via a Bluetooh module. Finally, this design of the LED driver with protection function and remote dimming fuction has applied to a 36W light module.By the results of the test, the LED driver has a wide range of input voltage from AC 90V to 240V, and high power factor and high efficiency.