Quantum　dots　(QDs)　have　received　widespread　attention　because　of　their　adjustable　emitted　wavelength　of　light,　color　purity　and　high　quantum　efficiency,　which　have　great　potential　in　applications　requiring　high-color-quality　displays　with　photoluminescence.　In　this　paper,　the　progress　of　QD　backlights　based　on　each　QDs　on-chip,　QDs　on-surface　and　QDs　on-edge　are　reviewed,　including　their　principle,　structures　and　current　applications.　Then,　several　other　novel　QD　backlight　structures　are　also　introduced,　prompting　a　proposal　for　two　novel　QD　backlight　technologies.　One　is　the　QDs　scattering　diffusion　plate,　which　is　prepared　by　injecting　molding　with　a　mixture　of　QDs　and　polymer　at　a　low　temperature.　The　other　is　a　QD　microstructure　light　guide　plate,　which　is　fabricated　by　transferring　QDs　on　the　surface　of　a　light　guide　plate　through　screen　printing　or　inkjet　printing.　Both　of　these　two　QD　plates　can　achieve　high　color　gamut　while　being　simple　to　process,　being　low　in　cost　and　holding　high　production　efficiency.　These　have　wide　applications　in　high　color　gamut　liquid　crystal　displays.　©　2020,　China　Science　Publishing　&　Media　LTD.　All　right　reserved.