Backlight unit including light guide and gap retainer

摘要

A backlight unit includes a light source; a light guide; a gap retainer including two plate-like portions orthogonal to each other, the light guide being placed over a first plate-like portion of the two plate-like portions, the light source being attached to a side of a second plate-like portion of the two plate-like portions; a chassis including a frame-shaped side wall portion and a bottom portion, the gap retainer being positioned with respect to the chassis such that the second plate-like portion and the side wall portion face each other and the first plate-like portion and the bottom portion face each other; and an elastic body urging the gap retainer in a direction away from the side wall portion. The gap retainer includes a stopper to maintain a gap between the light source and the side edge surface of the light guide.

主权项

1. A backlight unit comprising:
a light source; a light guide disposed so as to be separated from the light source so that light from the light source is incident on a side edge surface of the light guide; a plurality of gap retainers, each of which includes two plate-like portions orthogonal to each other so as to have an L-shaped cross section, the light guide being placed over a first plate-like portion of the two plate-like portions, the light source being attached to a side of a second plate-like portion of the two plate-like portions; a chassis that includes a frame-shaped side wall portion and a bottom portion, the plurality of gap retainers being positioned with respect to the chassis such that the second plate-like portion and the side wall portion face each other and the first plate-like portion and the bottom portion face each other; and an elastic body disposed between the side wall portion and the second plate-like portion, the elastic body urging the plurality of gap retainers in a direction away from the side wall portion, wherein each of the plurality of gap retainers includes a stopper positioned on an upper surface of the first plate-like portion, the stopper being constantly in contact with a portion of the side edge surface of the light guide due to being pressed by the elastic body to maintain a gap between the light source and the side edge surface of the light guide; and the plurality of gap retainers are disposed so as to be in contact with two opposite side edge surfaces of the light guide.