Study on integrated circuit design for multi-color LED pulse-width modulation

Abstract

This paper takes advantage of digital dimming auto-control pulse width drive Light-Emitting Diodes to let the light in terms of brightness fade to gray by degrees and have the effect of mixture of colors. Also, Light-Emitting Diodes in such three primary colors as red, green, and blue mix with one another to yield various colors. Therefore, better stability, simpler structure and better effect of dimming. Moreover, it succeeds in utilizing red, green, and blue Light-Emitting diodes at room temperature to change Color Rendering Index of the cool white Light-Emitting Diodes. The design of the circuit makes use of the manufacturing technique of Very Large Scale Integration to make the completion of Integrated Circuit (TSMC 0.35μm MIXED MODE 2P4M 3.3v process). © 2012 Springer-Verlag.