OPTICAL DEVICE, LIGHT UNIFORMING DEVICE, OPTICAL SHEET, BACKLIGHT UNIT, AND DISPLAY DEVICE

摘要

[PROBLEMS] To provide an optical device, a light uniforming device, an optical sheet, a backlight unit, and a display device in which a lamp image can be eliminated by uniformly outputting incident lights from light sources and in which warpage due to heat generated from the light sources does not occur even if the distance between the light sources and the optical device or the light uniforming device is shortened. [MEANS FOR SOLVING PROBLEMS] An optical device comprises a light propagation layer and a light deflection element having a function of deflecting light in a two-dimensional direction. A light uniforming device is constituted by integrally forming a diffusion base on the light output surface side of the light propagation layer of the optical device. A display device is constituted by disposing the light diffusion element of the optical device or the light uniforming device on the light-sources side of the display device and if necessary, further disposing an optical member or the like on the light propagation layer of the optical device or on the diffusion base of the light uniforming device.