Backlight unit
AssigneeSamsung Display Co., Ltd.
InventorsTaek-Sun SHIN, Seul-Gi KIM, Yongkyu KANG, Hayoung LEE
Life of this patent
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Abstract
A back light unit includes a light source and a light guide unit having a first surface emitting light to a display panel, a second surface facing the first surface, and a plurality of connecting surfaces connecting the first surface and the second surface. The connecting surfaces includes a first side surface, a second side surfaces and a third side surface between the first side surface and a second side surface, A first included angle of the first incident surface and the first diffusion surface is equal to or greater than about 90 degree.
Claims28
A backlight unit comprising:
- a light source emitting light;
- and
- a light guide unit that includes a first surface, a second surface facing the first surface, and a plurality of connecting surfaces connecting the first surface and the second surface, the light guide unit guide the light from the light source to the display panel, the connecting surfaces comprising:
- a first side surface extending in a first direction;
- a second side surface facing the first side surface;
- a third side surface extending in a second direction substantially perpendicular to the first direction;
- and
- a first incident surface disposed between the first side surface and the third side surface, the first incident surface receiving the light from the light source and including at least one first serration pattern having a first diffusion surface and a second diffusion surface which is closer to the third side surface than the first diffusion surface,
- wherein a first included angle of the first incident surface and the first diffusion surface is equal to or greater than about 90 degree.
A backlight unit comprising:
- a light source emitting a light;
- and
- a light guide unit that includes a first surface, a second surface facing the first surface, and a plurality of connecting surfaces connecting the first surface and the second surface to guide the light from the light source, the connecting surfaces comprising:
- a first side surface extending in a first direction;
- a second side surface facing the first side surface;
- a third side surface that extends in a second direction crossing the first direction;
- and
- a first incident surface disposed between the first side surface and the third side surface, receiving the light from the light source, and including at least one first serration pattern having a first diffusion surface and a second diffusion surface,
- wherein the first incident surface defines a first included angle with respect to an extension surface of the third side surface, and
- wherein a second included angle of the first diffusion surface with respect to the first incident surface is in a range determined by the following Equation, and a third included angle of the second diffusion surface with respect to the first incident surface is smaller than the second included angle,
- Equation
- 90≦θ2≦90+θ1, where θ2 denotes the second included angle and θ1 denotes the first included angle.
Dependencies are inferred from the claim text.