Backlight unit and liquid crystal display device

Abstract

In order to suppress uneven brilliance of emitted planar light and enhance a rate of light utilization, the present invention provides a backlight unit (1) including: a light guide plate (2) receiving from a light source (31) from a light receiving surface (22) on a side surface and emitting planar light from a light emitting surface on a front surface; and a front side pressing member (5) having a light guide plate pressing portion (52) to press a peripheral portion on the front surface of the light guide plate (2); wherein an attached shape (211) in a concave and convex pattern shape is formed in the light emitting surface (21), and the light guide plate pressing portion (52) is provided with an engagement portion (521) provided with a concave and convex pattern that is engageable with a attached shape (211).

Dependencies are inferred from the claim text.