Due　to　the　problem　of　hysteretic　contact　angle　and　inconsistent　aperture　caused　by　charge　capture　in　chromatic　inks　of　electrowetting　electronic　paper,　the　reflected　brightness　and　contrast　of　the　display　are　reduced.　The　existing　optimization　methods　of　active　luminous　display　do　not　consider　the　properties　of　reflective　passive　display.　Combined　with　chromatic　electrowetting　characteristics,　an　electrowetting　display　algorithm　of　the　brightness　enhancement　is　proposed　based　on　dynamic　histogram　equalization　and　multi-scale　gamma　correction.　We　perform　histogram　equalization　correction　on　the　brightness　by　combining　the　weighting　of　the　aperture　ratio　and　the　distribution　of　the　illumination　components.　Then,　corresponding　compensation　weights　are　designed　based　on　the　different　reflection　brightness.　Furthermore,　the　illumination　component　is　extracted　by　multi-scale　Gaussian　convolution,　and　multi-scale　gamma　correction　based　on　different　photoelectric　characteristics　is　designed.　Ultimately,　through　threshold　discrimination,　the　images　of　enhanced　brightness　are　outputted　to　compensate　for　the　missing　or　insufficient　of　the　display　brightness.　The　experimental　results　demonstrate　that　the　images　processed　by　this　algorithm　after　brightness　enhancement　show　certain　improvements　in　objective　evaluation　indicators.　More　importantly,　the　images　processed　by　this　algorithm　exhibit　better　brightness　details　on　chromatic　electrowetting　displays.