摘要
農作物生長的速度的主要關鍵是在於光線照射的強度與照射時間，在足夠的照射強度下，增加照射時間可以有效的縮短生長週期[1]。燈具的光線強度遠遠不及陽光，所以前者無法取代後者，經實際實驗後發現，LED補光系統對於植物生長速度的影響效果非常明顯，此系統中分別為發光二極體(Light Emitting Diode, LED)燈及驅動電路，光線強度感測電路，當太陽光線強度在低於2000Lux時，經由光線強度感測電路啟動LED燈具，分別用光線強度5000Lux白光LED與光線強度2500Lux紅藍光LED作為補光燈具。應用在葉萵苣種植的實驗上，從種子到採收在一般陽光照射下種植必須60 ~ 90天，利用補光系統種植最快只要30~45天，也就是說明生長速度最佳可以增加一倍，種植週期有效的縮短至50%。 本文以MXIC 0.5um CMOS DPDM BCD 5V/65V HV Process進行設計，此LED升壓轉換電路具有可變斜率補償之機制，所以在輸入電壓源或負載改變時，自動調整輸出電壓到達穩定狀態，依據升壓轉換電路架構，利用脈波寬度調變控制及尖峰電流模式進行設計。
並列摘要
Intensity and time of light exposure are some of the key factors that affect the growth rate of vegetables. With enough light intensity and extending the time of light exposure can effectively reduce the growth period.[1] It was realized through experiment that light emitting diode (LED) compensation system has a significant effect with the plant growth rate, though it is not comparable to the light intensity produce by sunlight. This study presents the use of light emitting diodes for light compensation technique in extending the plant exposure to light with enough radiation intensity. The system composed of light emitting diode, driver circuit and light intensity sensing circuit. When the sunlight intensity is below 2000 LUX through the light intensity circuit, light emitting diode lamps will switch on. Two sets of lighting were used; 5000 LUX white light emitting diode and combination of red-blue light emitting diode with light intensity of 2500 LUX. In the experiment, lettuce plant was used, from seedling to crop harvest, under the sunlight exposure, it takes 60 to 90 days but with the proposed lighting compensation system it only takes 30 to 45 days, in which the growth rate is doubled and the growth period is reduced to 50%. The design process used for this study is MXIC 0.5um CMOS DPDM BCD 5V/65V HV Process. The LED boost converter circuit has a slope compensation mechanism therefore when the input source voltage or the load voltage changes, it will automatically adjust the output voltage to reach the steady state. The design is based from the boost converter circuit; it uses pulse width modulation and peak current mode to control the output.