使用红外线发光二极管时，驱动电路的设计相当重要，好的设计能使红外线发光二极管的发光效率最高，且使用寿命增长，所以在此要特别介绍驱动电路。-Using infrared light-emitting diode, drive circuit design is very important that good design can make infrared emitting diode highest luminous efficiency, and increased service life, so this special presentation to the drive circuit.