The influence of the spectral transmission variation of the color wheel's filters on the display primary colors was analyzed based on the fundamental theory of the colourometry and the characteristics of the digital light processing(DLP) optical engine.The color wheel system was designed aiming at the colorimetric characteristics of the optical engine in the AMOI TM DL52HWT rear-projection TV.The experimental results show that our design can satisfy with the need of the TV display compared with the referenced system.