Method of fabricating light guide plate, light guide plate fabricated thereby, and illumination device having the same

A transparent light guide plate comprising:

• a light guide plate body comprising a first surface facing a front observer and through which light is irradiated, a second surface opposite to the first surface, and a third surface connected to a peripheral portion of the first surface and a peripheral portion of the second surface to connect the first surface and the second surface, the third surface facing a light-emitting diode;
• and
• a light-scattering layer fabricated on an overall area of the second surface, the light-scattering layer comprising a matrix layer and a number of light-scattering particles dispersed in the matrix layer wherein the light-scattering particles have a different refractive index than the matrix layer,
• wherein number of the light-scattering particles per unit area vary by at least 1.2 times from a position located adjacent to the light-emitting diode and a position farthest from the light-emitting diode,
• wherein a dispersion density of the number of light scattering particles and a thickness of the light-scattering layer gradually increase with increases in a distance from the light-emitting diode facing at least one surface of the third surface,
• wherein the light guide plate has a hazing value of 30% or less and a transmittance of 50% or more,
• wherein a surface roughness of the light-scattering layer is 100 nm or less.