Surface light source device, backlight unit and liquid crystal display having the same
First Claim
1. A liquid crystal display comprising:
- a liquid crystal panel displaying images according to electrical signals provided from the outside device; and
a backlight unit for illuminating the liquid crystal panel from the back of the liquid crystal panel, the backlight unit comprising;
a surface light source device for providing surface light, the surface light source device including;
at least one light source generating light; and
at least one hollow light pipe including;
a first light waveguide unit with structured surface on at least one side; and
a second light waveguide unit with structured surface on at least one side and disposed substantially parallel to the first light waveguide unit,wherein a longitudinal direction of the structured surface of the first light waveguide unit and a longitudinal direction of structured surface of the second light waveguide unit form a certain angle.
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Accused Products
Abstract
The present invention is directed to a surface light source device utilizing a light pipe. The present invention is also directed to a backlight unit and a liquid crystal display which are provided with such surface light source device. A surface light source device comprises at least one light source generating light; and at least one hollow light pipe, the light pipe includes a first light waveguide unit with structured surface on at least one side; and, a second light waveguide unit with structured surface on at least one side and disposed substantially parallel to the first light waveguide unit, wherein a longitudinal direction of the structured surface of the first light waveguide unit and a longitudinal direction of the structured surface of the second light waveguide unit form a certain angle.
37 Citations
21 Claims
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1. A liquid crystal display comprising:
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a liquid crystal panel displaying images according to electrical signals provided from the outside device; and a backlight unit for illuminating the liquid crystal panel from the back of the liquid crystal panel, the backlight unit comprising; a surface light source device for providing surface light, the surface light source device including; at least one light source generating light; and at least one hollow light pipe including; a first light waveguide unit with structured surface on at least one side; and a second light waveguide unit with structured surface on at least one side and disposed substantially parallel to the first light waveguide unit, wherein a longitudinal direction of the structured surface of the first light waveguide unit and a longitudinal direction of structured surface of the second light waveguide unit form a certain angle. - View Dependent Claims (2)
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3. A backlight unit for illuminating a liquid crystal panel from the back of the liquid crystal panel, the backlight unit comprising a surface light source device for providing surface light, the surface light source device including:
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at least one light source generating light; and at least one hollow light pipe including; a first light waveguide unit with structured surface on at least one side; and a second light waveguide unit with structured surface on at least one side and disposed substantially parallel to the first light waveguide unit, wherein a longitudinal direction of the structured surface of the first light waveguide unit and a longitudinal direction of the structured surface of the second light waveguide unit form a certain angle. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A surface light source device for providing surface light, comprising:
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at least one light source generating light; and at least one hollow light pipe including; a first light waveguide unit with structured surface on at least one side; and a second light waveguide unit with structured surface on at least one side and disposed substantially parallel to the first light waveguide unit, wherein a longitudinal direction of the structured surface of the first light waveguide unit and a longitudinal direction of the structured surface of the second light waveguide unit form a certain angle. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification