Diffuser　plate　which　has　the　function　of　scattering　light　is　an　important　component　of　liquid　crystal　display　(LCD).　The　common　diffuser　plates　mainly　divide　into　the　type　of　surface　with　microstructure　and　internal　particle　scattering,　whose　essential　properties　are　hazing　and　transmitting　light.　The　diffuser　plates　with　embedded　quantum　dots　also　feature　color　conversion　and　improve　color　rendering　capabilities.　Compared　with　the　combination　of　a　quantum　dot　enhancement　film　(QDEF)　and　a　diffuser　plate,　the　quantum　dot　diffuser　plate　(QD-DP)　has　the　advantages　of　simpler　preparation　process,　lower　cost,　and　higher　atomization　ability,　which　is　suitable　for　mini-LED　backlight.　This　paper　briefly　summarizes　the　research　progress　of　diffuser　plate　for　liquid　crystal　display,　and　focuses　on　the　preparation　process　and　performance　of　a　multi-layer　QD-DP.　In　terms　of　stability,　the　prepared　QD-DP　can　be　stored　for　a　long　time　in　the　environment　of　high　temperature　and　high　humidity　(60　℃/90%),　and　the　lifetime　(T95)　exceeds　1　000　h　under　blue　light　irradiation　(450　nm,　45　℃/85%RH).　Moreover,　the　luminance　uniformity　of　QD-DP　under　450　nm　blue　light　irradiation　is　higher　than　80%.　The　half-peak　width　of　blue/green/red　light　is　lower　than　20　nm,　25　nm,　25　nm,　respectively.　The　color　gamut　area　reaches　99.　58%　of　the　DCI-P3　standard.　In　conclusion,　QD-DP　has　excellent　functions　of　color　conversion　and　uniform　light　coupled　with　the　characteristics　of　stable　lifespan,　which　is　expected　to　be　widely　used　in　large　and　medium-sized　LCDs.　©　2023,　Science　Press.　All　rights　reserved.