The　charge　capture　of　color　inks　in　chromatic　electrowetting　electronic　paper,　the　contact　angle　hysteresis　and　inconsistent　aperture　ratio　result　in　a　narrower　color　gamut　and　reduced　contrast　of　the　display　screen.　To　address　the　issue,　we　propose　an　algorithm　of　the　adaptive　color　conversion　and　the　dynamic　enhancement　display　based　on　the　aperture　ratio　of　the　chromatic　electrowetting.　Firstly,　the　relationship　between　the　aperture　ratio　of　electrowetting　and　the　increase　or　decrease　of　voltage　was　tested　through　an　experimental　platform.　Then,　combined　with　the　change　of　the　aperture　ratio,　the　reasonable　grayscale　allocation　is　made　for　color　space　conversion.　Furthermore,　considering　the　average　grayscales　of　each　color,　we　design　a　method　of　the　dynamic　contrast　enhancement　and　histogram　equalization　based　on　the　segmentation　of　aperture　ratios.　In　addition,　in　view　of　the　problem　of　grayscale　loss　in　the　reflective　display,　we　propose　an　adaptive　algorithm　of　domain　error　diffusion　with　saturation　enhancement　to　compensate　for　color　loss.　The　experiments　demonstrate　that　the　images　processed　by　our　algorithm　have　shown　certain　improvements　in　evaluation　indicators　compared　to　images　processed　by　other　methods.　Most　significant　of　all,　it　has　better　visual　display　effect　on　chromatic　electrowetting　electronic　paper,　displaying　more　details.　　©　2013　IEEE.