LIGHT-GUIDE PLATE, AREA LIGHT SOURCE DEVICE, DISPLAY DEVICE, MANUFACTURING METHOD FOR LIGHT GUIDE PLATE

Provided are a light guide plate, an area light source device, a display device, and manufacturing method for the light guide plate such that the occurrence of uneven luminance is suppressed. The light guide plate (12) is characterized in that the light guide plate has a light entrance surface (12a) through which light enters, a light exit surface (12c) intersecting with the light entrance surface(12a) and through which light is output, and an opposite surface (12b) facing the light entrance surface (12a), wherein the light entering through the light entrance surface (12a) is guided to the opposite surface (12b) side and output from the light exit surface (12c), and the refractive index Nx in a direction perpendicular to the light entrance surface (12a) is higher than the refractive indexNy in a direction parallel to the light exit surface (12c) and parallel to the light entrance surface (12a). 提供能够抑制亮度不均的发生的导光板、面光源装置、显示装置以及导光板的制造方法。导光板(12)的特征在于，具有：供光入射的入光面(12a)；出光面(12c)，其与入光面(12a)交叉，光从该出光面射出；以及对置面(12b)，其与入光面