The　performances　of　quantum-dot　(QD)　based　photoluminescent　devices　are　highly　restricted　by　the　application　environment,　especially　the　moisture　and　oxygen.　However,　current　external　encapsulation　structures　are　not　applicable　to　the　devices　with　discrete　QD　distribution,　especially　for　some　rough　profiles.　To　address　this　issue,　an　encapsulation　method　for　discretely　distributed　quantum-dot　arrays　(DQDA)　is　proposed　for　liquid　crystal　display　(LCD)　backlight　applications,　in　which　the　DQDA　can　be　well　fabricated　by　printing　the　QD　slurry　onto　a　light　guiding　substrate　(LGS),　and　then　covered　with　a　thin　UV　glue　layer　and　a　barrier　film.　By　specially　optimizing　the　UV　glue　and　barrier　film,　this　ultra-thin　encapsulation　structure　cannot　only　improve　the　surface　defects　of　the　QD　morphology　without　affecting　the　original　light　path　and　the　output　optical　performance,　but　also　significantly　suppress　the　fluorescence　decay　and　isolate　moisture　and　oxygen　by　almost　100　times　compared　with　unencapsulated　one.　The　water　vapor　transmission　rate　(WVTR)　was　measured　to　be　1.29　x　10(-4)　g/m(2)/day　after　fabricated　the　stacked　encapsulation　structure.　After　a　long　period　of　aging　test,　the　encapsulated　sample　kept　its　luminance　for　1000　hours.　This　method　also　has　potential　to　widely　used　for　discrete　structures　in　other　device　applications　due　to　its　easy　fabrication　process,　high　reliability,　and　low　manufacturing　costs.