Patent ID: 9568667
Date: 2017-02-14
CPC Classifications: G02B,G02F

Claim:
1. A backlight unit comprising: a light source having an emission region; a wiring board having the light source mounted thereon; a light guide plate having a side surface into which light from the light source enters, and a front surface from which the light exits; a light shielding adhesive tape adhering to the wiring board; and an optical sheet which overlaps with the front surface of the light guide plate; wherein the front surface of the light guide plate comprises an effective region serving as a planar light source and a light entering region ranging from the side surface to the effective region; wherein the wiring board and the light-shielding adhesive tape each have a part positioned in the light entering region; and wherein the optical sheet is arranged from the effective region to the light entering region, and at least an end portion of the optical sheet overlaps with the light-shielding layer in the light entering region.