Aiming　at　the　influence　of　reflective　electrowetting　display　on　the　definition　and　contrast　of　the　content　on　the　display　under　different　ambient　light,　this　paper　proposes　a　brightness　correction　method　based　on　preserving　the　difference　of　visual　response　of　adjacent　grayscale　under　different　ambient　light.　The　difference　is　consistent　with　the　response　difference　under　reference　ambient　light.　At　the　same　time,　in　order　to　achieve　precise　modulation　of　the　electrowetting　display,　the　corrected　brightness　is　subjected　to　secondary　nonlinear　correction.　The　method　makes　the　relationship　between　the　corrected　voltage　and　the　brightness　curve　more　linear,　improves　the　contrast　of　the　electrowetting　display,　increases　the　image　detail,　and　optimizes　the　display　effect.　©　2019,　Science　Press.　All　right　reserved.