A display device comprising: a display panel; a light source configured to emit light toward the display panel; a diffuser plate configured to diffuse incident light, the diffuser plate being disposed between the light source and the display panel; an optical lens configured to diffuse light emitted from the light source; and at least one support (116, 117, 118) located adjacent to an edge of the optical lens and protruding toward the diffuser plate, the optical lens being integrally formed with the at least one support, wherein the optical lens comprises: a reflecting portion extending radially outward from the centre of the optical lens, the reflecting portion having a front surface that is inclined towards the front of the optical lens as the reflecting portion extends radially outward, a flat portion extending radially outward from the reflecting portion, the flat portion having a front surface that is substantially parallel to the display panel, a first inclined portion extending radially outward from the flat portion, the first inclined portion having a front surface that is inclined towards the rear of the optical lens as the first inclined portion extends radially outward, a second inclined portion extending radially outward, the second inclined portion having front and rear surfaces that are inclined toward the rear of the optical lens as they extend radially outward from the first inclined portion, and the second inclined portion being inclined at a more shallow angle than the first inclined portion, and wherein the front surface of the reflecting portion comprises: a first reflecting surface inclined in a radial direction of the optical lens; and a second reflecting surface inclined in the radial direction of the optical lens at a different angle than the first reflecting surface. a display panel; a light source configured to emit light toward the display panel; a diffuser plate configured to diffuse incident light, the diffuser plate being disposed between the light source and the display panel; an optical lens configured to diffuse light emitted from the light source; and at least one support (116, 117, 118) located adjacent to an edge of the optical lens and protruding toward the diffuser plate, the optical lens being integrally formed with the at least one support, wherein the optical lens comprises: a reflecting portion extending radially outward from the centre of the optical lens, the reflecting portion having a front surface that is inclined towards the front of the optical lens as the reflecting portion extends radially outward, a flat portion extending radially outward from the reflecting portion, the flat portion having a front surface that is substantially parallel to the display panel, a first inclined portion extending radially outward from the flat portion, the first inclined portion having a front surface that is inclined towards the rear of the optical lens as the first inclined portion extends radially outward, a second inclined portion extending radially outward, the second inclined portion having front and rear surfaces that are inclined toward the rear of the optical lens as they extend radially outward from the first inclined portion, and the second inclined portion being inclined at a more shallow angle than the first inclined portion, and wherein the front surface of the reflecting portion comprises: a first reflecting surface inclined in a radial direction of the optical lens; and a second reflecting surface inclined in the radial direction of the optical lens at a different angle than the first reflecting surface. a reflecting portion extending radially outward from the centre of the optical lens, the reflecting portion having a front surface that is inclined towards the front of the optical lens as the reflecting portion extends radially outward, a flat portion extending radially outward from the reflecting portion, the flat portion having a front surface that is substantially parallel to the display panel, a first inclined portion extending radially outward from the flat portion, the first inclined portion having a front surface that is inclined towards the rear of the optical lens as the first inclined portion extends radially outward, a second inclined portion extending radially outward, the second inclined portion having front and rear surfaces that are inclined toward the rear of the optical lens as they extend radially outward from the first inclined portion, and the second inclined portion being inclined at a more shallow angle than the first inclined portion, and wherein the front surface of the reflecting portion comprises: a first reflecting surface inclined in a radial direction of the optical lens; and a second reflecting surface inclined in the radial direction of the optical lens at a different angle than the first reflecting surface. a first reflecting surface inclined in a radial direction of the optical lens; and a second reflecting surface inclined in the radial direction of the optical lens at a different angle than the first reflecting surface.