The　thin　optical　waveguide　combiner　is　responsible　for　pupil　expansion　of　augmented　reality　(AR)　displays.　The　exit　pupil　guides　the　display　information　into　human　eyes　by　inducing　multiple　diffractions　from　the　coupling　region　with　extension.　However,　this　multiple　diffraction　may　lead　to　the　gradual　weakening　of　exit　pupil　brightness　along　the　spatial　distribution　of　the　light　path,　resulting　in　uneven　brightness.　In　particular,　when　the　coupling　elements　are　fabricated　by　liquid　crystal　polarization　volume　grating　(LCPVG),　which　is　only　sensitive　to　a　kind　of　circularly　polarized　light　according　to　the　Bragg　grating　property,　the　orthogonal　circularly　polarized　light　will　be　directly　transmitted,wasting　the　rest　of　display　information.　To　address　this　issue,　this　paper　proposes　an　optical　waveguide　AR　display　system　based　on　LCPVG,　which　provides　the　left-handed　and　right-handed　circular　polarization　light　multiplexing,　achieving　large　pupil　area　with　good　uniformity.　The　LCPVG　is　designed　in　the　k-space　to　achieve　the　maximum　field　of　view　with　the　diffraction　wavelength　of　532　nm,　combining　the　microdisplay　unit　which　consists　of　a　micro-LED　(μLED)　display　with　a　set　of　matching　projection　lenses,　providing　the　exit　pupil　size　of　45　mm×25　mm.　The　experimental　results　show　that　the　diagonal　field　of　view　of　the　waveguide　system　reaches　the　expected　32.　86°　with　the　substrate　refractive　index　of　1.　51.　Compared　with　the　scheme　that　only　responds　to　a　single　circular　polarized　light,　the　uniformity　measured　by　the　nine-point　method　is　increased　by　48.　8%,　the　overall　uniformity　is　increased　by　34.　1%,　and　the　optical　efficiency　of　the　waveguide　combiner　is　also　improved　by　1.　2　times.　This　work　provides　valuable　guidance　and　reference　for　the　design　of　polarization　volume　grating　waveguides　for　AR　display　systems.　©　2024,　Science　Press.　All　rights　reserved.