||As the development of microelectronic technology, flat-panel microdisplay has become a reality. The microdisplay can be applied on both the projection display and personal viewer systems. The advantage of microdisplay are high resolution, high integration, high bandwidth and very low power consumption. The conventional microdisplay is a monochrome display. In order to achieve full color, color-separation prism and three panels are used for projection display, and color sequential technique is used for personal viewer. The former requires a very precise alignment of three panels. The latter requires a high data refresh rate and limits the resolution of microdisplay. In this thesis, I applied micro color filters on microdisplay to achieve full color. This technology was compatible with microelectronic technology. The line width of micro color filter can be as fine as 3μm. The micro color filter on chip had a very flat topographic surface, which is very critical to the latter liquid crystal alignment. The micro color filter had a high temperature and light stability, a good color saturation, for the requirements of color projection display. Reflective mode liquid crystal cell was further applied on the micro color filter chip. The contrast ratio of projection system was as high as 190, 240 and 90 for red, green and blue pixels under white light illuminating, respectively. I believe this novel color-filter-on-microdisplay technology can be applied to achieve full color in both projection display and personal viewer systems.