The video display device using light unit and this back

摘要

To provide a back light unit (7) that reduces an uneven brightness and has a spatially uniform brightness distribution. According to an aspect of the present invention, the back light unit (7) comprises an LED (2) and a light guide plate (1) for guiding light from the LED (2) to a liquid crystal panel side, wherein a recess (11) is provided on the back surface side of the light guide plate (1), wherein a plurality of LEDs (2) are housed in the recess (11), and wherein a light amount limiting member (6) is provided at a position facing the recess (11) on the light exit surface (1b) side of the light guide plate (1). The light amount limiting member (6) is configured, for example, by applying an ink (6b) with a predetermined optical property to a transparent sheet (6a).