Lighting device and display device using the same

摘要

A lighting device includes a light guide plate and a point light source located on a light incident surface side of the light guide plate. Micro-structures for light-scattering are provided separate from one another on a surface opposed to the light exit surface of the light guide plate. Each of the micro-structures for light-scattering has an orientation in a longitudinal direction. The longitudinal direction becomes substantially parallel to a direction joining the micro-structure for light-scattering with the point light source. With this structure, a high intensity of the lighting device is realized. The surface opposed to the light exit surface of the light guide plate is divided into a plurality of regions. A thickness of the light guide plate reduces stepwise in the respective regions as a distance from the point light source increases.