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 placed on the substrate , wherein the reflective plate 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 (T1), and the first thickness (T1) 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 (T3), the light source has a first distance (L3) from the substrate to a light-emitting point (LP) at the top of the light source , and the second thickness (T3) is smaller than the first distance (L3). 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 placed on the substrate , wherein the reflective plate 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 (T1), and the first thickness (T1) 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 (T3), the light source has a first distance (L3) from the substrate to a light-emitting point (LP) at the top of the light source , and the second thickness (T3) is smaller than the first distance (L3). <EOS>