Electrophoretic　display　(EPD)　has　the　same　reflective　and　wide　viewing　angle　characteristics　as　paper,　and　also　has　the　advantages　of　low　power　consumption　and　bistability.　At　the　sametime,　its　eye　protection　characteristics　are　deeply　loved　by　the　public,　so　that　people　have　more　expectations　for　color　EPD,　but　there　are　still　problems　such　as　poor　quality　and　jagged　edges　of　the　display　image.　Due　to　the　limitation　of　the　grayscale　range　caused　by　the　driver　chip　and　the　driving　mode　of　EPDs,　when　the256-level　grayscale　image　on　the　PC　is　put　on　the　EPD　for　display,　the　driving　circuit　system　will　compress　the　grayscale.　This　results　in　a　loss　of　detail,　a　step　jump　in　the　image,　and　a　lack　of　clarity　in　the　texture.　In　order　to　solve　the　above　problems,　a　multi-level　error　diffusion　algorithm　based　on　edge　enhancement　is　proposed.　The　dataset　KODIM　was　selected　as　the　experimental　object,　compared　with　the　traditional　error　diffusion　algorithm,　the　image　quality　evaluation　index　PSNR　is　improved　by　22.4%-30.8%,　and　SSIM　is　closer　to　1.　And　the　EPD　shows　more　image　details,　which　brings　a　better　visual　experience　to　the　users　of　epaper.　©　2024　John　Wiley　and　Sons　Inc.　All　rights　reserved.