| Summary: | 碩士 === 國立勤益科技大學 === 電子工程系 === 102 === Light Emitting Diode (LED) is widely used in lighting systems and decorative lights. The technology of LED in brightness and color saturation has been rapidly changing. This article is to explore a variety of LED development process, as well as its applications and control methods, which include LED manufacturing process, backlight, and control methods such as PWM and constant current driver. In addition, we use a microcontroller (MSP430) with a thermistor to respond the temperature of surroundings, and then to adjust brightness via RGB primary colors; the color temperature of a nightlight will be change indoors. Uniform light reflection to the surface of a cylinder with fog, it can be uniformly mixed, increase the color saturation.
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