Abstract: A display device and a backlight unit are provided. A display device including a first side on which a light source is disposed to face the first side, the display device includes an optical member including a light guide plate, a light source assembly disposed adjacent to the first side of the optical member, a lower accommodation container accommodating the light source assembly and the optical member, a backlight unit disposed on the lower accommodation container and including a middle accommodation container including a central opening; and a display panel disposed on the backlight unit and the middle accommodation container, wherein the middle accommodation container includes a middle chassis located at the first side, and a middle mold fastened to the middle chassis and disposed along at least one side of the display device other than the first side, and the middle chassis is formed of a material having a greater heat conductivity than the middle mold.

Abstract: An optical member includes a light guide plate, a wavelength conversion layer, and a reflective tape. The wavelength conversion layer is disposed on an upper surface of the light guide plate. The reflective tape includes a first side portion covering first side surfaces of the light guide plate and the wavelength conversion layer. The reflective tape includes a first surface and a second surface. The first surface is configured to reflect light of a first wavelength band and light of a second wavelength band different from the first wavelength band. The second surface is configured to absorb the light of the first wavelength band.

Abstract: An optical member includes a light guide plate, a wavelength conversion layer, and a reflective tape. The wavelength conversion layer is disposed on an upper surface of the light guide plate. The reflective tape includes a first side portion covering first side surfaces of the light guide plate and the wavelength conversion layer. The reflective tape includes a first surface and a second surface. The first surface is configured to reflect light of a first wavelength band and light of a second wavelength band different from the first wavelength band. The second surface is configured to absorb the light of the first wavelength band.