A display device (DD) comprising: a light-emitting element layer (LED); and a light control layer (CTL) on the light-emitting element layer (LED), wherein the light control layer (CTL) comprises: a plurality of separated partition wall parts (BP) comprising a partition wall part (BP); a color control part (CL, CL-1, CL-3) between the partition wall parts (BP), the color control part (CL) comprising quantum dots (QD, QD-R, QD-G) and a first scattering particle (SC-C); and a coating layer (AT, AT-a) covering a side of the partition wall part (BP) adjacent to the color control part (CL, CL-1, CL-3), wherein the coating layer (AT, AT-a) comprises at least one selected from a substituted dispersant (SP) and a substituted scattering particle (SC-A), the substituted dispersant (SP) comprising at least one substituent (R10) selected from an amine group and a carboxyl group, the substituted scattering particle (SC-A) comprising at least one substituent (R1) selected from an amine group and a carboxyl group, and wherein the amine groups and the carboxyl groups comprised in the coating layer (AT, AT-a) are different in number from each other. a light-emitting element layer (LED); and a light control layer (CTL) on the light-emitting element layer (LED), wherein the light control layer (CTL) comprises: a plurality of separated partition wall parts (BP) comprising a partition wall part (BP); a color control part (CL, CL-1, CL-3) between the partition wall parts (BP), the color control part (CL) comprising quantum dots (QD, QD-R, QD-G) and a first scattering particle (SC-C); and a coating layer (AT, AT-a) covering a side of the partition wall part (BP) adjacent to the color control part (CL, CL-1, CL-3), wherein the coating layer (AT, AT-a) comprises at least one selected from a substituted dispersant (SP) and a substituted scattering particle (SC-A), the substituted dispersant (SP) comprising at least one substituent (R10) selected from an amine group and a carboxyl group, the substituted scattering particle (SC-A) comprising at least one substituent (R1) selected from an amine group and a carboxyl group, and wherein the amine groups and the carboxyl groups comprised in the coating layer (AT, AT-a) are different in number from each other. a plurality of separated partition wall parts (BP) comprising a partition wall part (BP); a color control part (CL, CL-1, CL-3) between the partition wall parts (BP), the color control part (CL) comprising quantum dots (QD, QD-R, QD-G) and a first scattering particle (SC-C); and a coating layer (AT, AT-a) covering a side of the partition wall part (BP) adjacent to the color control part (CL, CL-1, CL-3), wherein the coating layer (AT, AT-a) comprises at least one selected from a substituted dispersant (SP) and a substituted scattering particle (SC-A), the substituted dispersant (SP) comprising at least one substituent (R10) selected from an amine group and a carboxyl group, the substituted scattering particle (SC-A) comprising at least one substituent (R1) selected from an amine group and a carboxyl group, and wherein the amine groups and the carboxyl groups comprised in the coating layer (AT, AT-a) are different in number from each other. <EOS>