A display apparatus including a light-emitting device, the light-emitting device comprising a substrate on which a light source is provided, wherein the light source is configured to emit first-wavelength light other than white light; a wavelength conversion sheet configured to perform wavelength conversion of the first-wavelength light into a second-wavelength light different from the first wavelength; a wavelength selection sheet arranged between the light source and the wavelength conversion sheet, wherein the wavelength selection sheet is configured to transmit the first-wavelength light emitted from the light source and to shield the second-wavelength light emitted from the wavelength conversion sheet;a reflective plate (3, 3A, 3B, 3C, 3D) placed on the substrate, wherein the reflective plate (3, 3A, 3B, 3C, 3D) comprises a polymer resin and includes an opening into which the light source is inserted, a sloped section including a surface that is sloped with respect to the substrate and surrounding the opening, and having a first thickness, and the first thickness is a dimension of the sloped section in a direction orthogonal to a sloped surface, a bottom surface section into which the openings are formed, and in contact with the top surface of the substrate, the bottom surface section coupled to a bottom end of the sloped section, wherein the bottom surface section has a second thickness, the first thickness is greater than the second thickness, the light source has a first distance from the substrate to a light-emitting point at the top of the light source, and the second thickness is smaller than the first distance. a substrate on which a light source is provided, wherein the light source is configured to emit first-wavelength light other than white light; a wavelength conversion sheet configured to perform wavelength conversion of the first-wavelength light into a second-wavelength light different from the first wavelength; a wavelength selection sheet arranged between the light source and the wavelength conversion sheet, wherein the wavelength selection sheet is configured to transmit the first-wavelength light emitted from the light source and to shield the second-wavelength light emitted from the wavelength conversion sheet;a reflective plate (3, 3A, 3B, 3C, 3D) placed on the substrate, wherein the reflective plate (3, 3A, 3B, 3C, 3D) comprises a polymer resin and includes an opening into which the light source is inserted, a sloped section including a surface that is sloped with respect to the substrate and surrounding the opening, and having a first thickness, and the first thickness is a dimension of the sloped section in a direction orthogonal to a sloped surface, a bottom surface section into which the openings are formed, and in contact with the top surface of the substrate, the bottom surface section coupled to a bottom end of the sloped section, wherein the bottom surface section has a second thickness, the first thickness is greater than the second thickness, the light source has a first distance from the substrate to a light-emitting point at the top of the light source, and the second thickness is smaller than the first distance.