Planar light source device and liquid crystal display device
AssigneeSharp Kabushiki Kaisha
InventorsMASAKAZU KOMANO, MAKOTO HIBITANI
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Abstract
An embodiment of the present invention reduces difference in brightness between a portion where a tab of an optical sheet is formed and a portion where the tab is not formed. A frame (3) of a planar light source device (1) has an inclined surface (13) formed so as to incline with respect to a direction perpendicular to a light exit plane and to face in a direction opposite to the light exit plane. The inclined surface (13) is formed at least at a portion where a cut part (17) is not formed, which portion is part of a surface (12) of the frame (3) which surface (12) faces a lateral surface (11) of a light guide plate (2). At a bottom surface (14) of the frame (3), a light absorbing member (6) is provided.
Claims8
A planar light source device comprising:
- a light source which emits light outside;
- a light guide plate which causes the light to exit outside through a light exit plane while guiding the light;
- an optical sheet including a tab and provided on a first side of the light guide plate, the first side being a side where the light exit plane is present;
- a frame in which the light source, the light guide plate, and the optical sheet are provided, the frame having a cut part in which the tab of the optical sheet is fit;
- and
- a light absorbing member provided on a bottom surface of the frame,
- the frame having a first inclined surface formed so as to incline with respect to a direction perpendicular to the light exit plane and to face in a direction opposite to the light exit plane, the first inclined surface being formed at least at a first portion where the cut part is not formed, the first portion being part of at least one surface of the frame, the at least one surface of the frame facing a lateral surface of the light guide plate.
Dependencies are inferred from the claim text.