The　novel,　to　our　knowledge,　ultra-high-resolution　LCD-partitioned　color-tuning　technology　uses　metal　grilles　to　achieve　backlight　partition　light-color　isolation.　However,　the　design　of　the　metal　grille　is　extremely　demanding　in　terms　of　thermal　expansion　matching,　machining　accuracy,　and　installation　precision,　and　any　slight　deviation　may　significantly　affect　the　display　effect.　To　this　end,　this　paper　proposes　a　demetallized　grille　optical　structure　that　integrates　a　black　matrix　array　on　a　diffusion　sheet.　Although　this　scheme　eliminates　the　limitations　of　the　metal　grille,　its　optical　efficiency　is　only　67.06%　of　the　standard　structure　of　the　metal　grille,　the　color　crosstalk　rate　is　4.26%,　and　there　are　obvious　dark　areas　in　the　corners　of　the　backlight　partition　of　the　structure,　which　do　not　meet　the　design　requirements.　For　this　reason,　this　paper　further　proposes　a　square　prism　high-efficiency　concentrator　structure　with　an　integrated　black　matrix　array,　which,　by　optimizing　the　structural　parameters,　improves　its　optical　efficiency　to　106.28%　of　the　standard　structure　and　reduces　the　color　crosstalk　rate　to　0.12%,　while　effectively　eliminating　the　dark-area　defects.　Apparently,　this　structure　achieves　an　optimal　balance　between　optical　efficiency　and　color　purity,　effectively　replacing　the　optical　structure　of　the　integrated　metal　grille.　It　provides　an　economically　viable　and　practical　solution　for　light-color　isolation　in　the　novel　ultra-high-resolution　LCDs.　©　2025　Optica　Publishing　Group.　All　rights,　including　for　text　and　data　mining　(TDM),　Artificial　Intelligence　(AI)　training,　and　similar　technologies,　are　reserved.