Patent ID: 7999887

Claim:
A liquid crystal display device comprising: a liquid crystal panel; a backlight which radiates light to the liquid crystal panel; a light emitting element which is mounted on the backlight; a light guide plate on which light from the light emitting element is incident; the light guide plate having an upper surface which is arranged to face the liquid crystal panel; the light guide plate having a bottom surface which is arranged to face the upper surface; the bottom surface of the light guide plate having grooves formed therein delimited by at least a first slant surface and a second slant surface which extend at a slant at different angles with respect to the bottom surface, the first slant surface being arranged closer to a light emitting element side of the light guide plate than the second slant surface; and a reflection sheet which reflects the light radiated from the bottom surface; wherein a light reflected by at least one of the first slant surface, the second slant surface, and the reflection sheet radiate from the upper surface; wherein a peak of an intensity of the light radiated from the upper surface is inclined in a direction away from the light emitting element; wherein the grooves are formed to produce a first light which is reflected on the grooves and a second light which is radiated from the grooves and is reflected on the reflection sheet; wherein the angle of the first slant surface with respect to the bottom surface is greater than the angle of the second slant surface with respect to the bottom surface; and wherein an asymmetric prism sheet is arranged on the light guide plate.