LED的驱动电路研究设计2013719194649886.docVIP

LED的驱动电路研究设计 摘 要 LED（发光二极管）的优点有很多，最重要的一点是省电，耗能低，还有牢固性高，现在逐渐大范围的应用到社会个各地方各个行业；LED的应用由驱动电路控制，以此便可以得到非常好的电流，来确保LED的工作能正常进行；LED的电压源供电方式与普通白炽灯不同，必须要有驱动电路，因为若电压稍有一点增大，电流就有可能会增大至烧坏击穿LED的程度。 在本文开始我们阐述了LED的发展现状及其应用领域，后介绍了LED的原理和特性参数，又对LED的典型驱动电路和集成驱动电路进行了研究分析。从LED的驱动电路入手，设计了一款LED循环灯，并基于芯片LM358设计了一款声控旋律灯实用驱动电路，在理论上和实验中进行了分析研究，阐述了其原理，从实验的角度论证了的可行性和必要性。 关键词：供电；控制；发光二极管；驱动电路；研究Design of driving circuit of LED Abstract LED (light emitting diode) has many advantages, the most important point is the power saving, low energy consumption, and high firmness,it has a wide range of applications to social each local industries now; the application of LED is controlled by the drive circuit which can get a very good current, so it could ensure that the LED can work normally; The way of LED’s voltage source power supply is different from the common incandescent lamps which driving circuit is needed, because if the voltage slightly increases, current will be increased to burn out the breakdown of LED degree. At the beginning of this paper we described the development status and application field of LED, and introduced the principle and the characteristic parameters of LED, and analyzed the LED typical drive circuit and integrated circuit. We Started from the LED driving circuit with designed a LED lamp, and designed a voice melody lamp drive circuit based on the chip LM358, analyzed and studied in theory and experiment, elaborated its principle, demonstrated the necessity and feasibility from the experimental point of view. Keywords: power supply, control, light emitting diodes, drive circuit, study目 录 中文摘要 I 英文摘要 II 1. 引言 1 1．1研究的意义及内容 1 1．2 LED的发展现状 1 2. LED原理 2 2．1 LED发光原理与结构 2 2．2 LED的参数特性 3 2．3 LED的优缺点 5 3. LED驱动电路的研究 5 3．1 LED驱动技术的研究 5 3．2 LED的集成驱动电路 7 4. LED驱动电路的设计 8 4．1 LED 循环灯 8 4．2 声控旋律灯的设计 10 5. 结论 11 参考文献 13 致谢 14 1. 引言 LED(发光二极管)。 1．1研究的意义及内容 目前为止，LED还是一种新的科技和材料，有些产品还在研发中，掌握核心技术的发光芯片制造技术只有美国和日本等少数几个国家，但这并不否定LED发展前景还是极其广阔的。LED光源的优势有许多，有些是其他光源不可取代的。但世界LED照明产业相对发达地区相比，中国大陆