Direct type Backlight Unit and Liquid crystal display device having direct type backlight unit

摘要

The direct type backlight unit according to the present invention includes a light source that emits light, a light guide plate having a light incident surface to which light from the light source is incident, and a light refracting surface to which the incident light is refracted, and surrounding the light source while underneath the light guide plate. It characterized in that it comprises an optical structure for injecting light to the light incident surface, by reducing the optical gap (optical gap) it is possible to slim the liquid crystal display device including a direct type backlight unit and a direct type backlight unit.