本論文主要在討論陣列式紫外光發光二極體之應用及其驅動電路之設計,本研究之電路架構為延續自動定電流控制系統(ACC)、傳統式自動功率控制系統(APC(T))及新式自動功率控制系統(APC(N)),並結合頻率與任務週期可調的脈波產生電路,改良成脈波調變式功率控制系統。ACC系統能夠使紫外光LED在定電流模式下工作,APC(T)系統能夠使LED在穩定電功率模式下工作,APC(N)系統能夠使LED輸出光功率在衰減時做功率補償,由以上三種控制方式可以減少周圍環境溫度變化對紫外光發光功率的影響,達到穩定的電流供應並穩定其輸出之光功率,最後加上脈波調變控制的方式來降低LED之工作溫度增加穩定性,所以本文以脈波調變式功率控制系統為重點,分析在各控制系統模式下以連續波、脈波及有載波之脈波三種輸入信號驅動之情況,進行紫外光LED光功率輸出品質之比較。
This paper describes the study on application of UV LED array and the design of driving circuit. The system structure of this study is continuous with automatic current control system (ACC), traditional automatic power control system (APC(T)) and new automatic power control system (APC(N)), and combined with multi-band pulse generator, finally modified into Pulse Width Modulation Power Control System. ACC system can enable the LED to work in constant current. APC(T) system can enable the LED to work with stable electric power. APC(N) system can enable the LED to work with photo power compensation. The abilities of these control systems are reducing the influence of ambient temperature on the UV-emitting power, and achieving a stable driving current. Therefore, the system can stabilize the output power of LED. Finally, the system combined with the PWM control to reduce the operating temperature of LED and increase stability. So this paper focus on testing system with UV LED in order to analysis the conditions of different control system modes with three kinds of input signals such as DC, pulse and pulse with carrier. Then, comparing the quality of UV-emitting power.