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US 7,350,957 B2Granted
Light guide plate, surface light source having same, and related display device
AssigneeHon Hai Precision Industry Co., Ltd.
InventorMing-Yi Liao
Life of this patent
Estimating the term…
Abstract
A light guide plate (100) includes a light incident surface (110), two opposite light emitting surfaces (120) each adjoining to the light incident surface, a plurality of first tapered structures (132), and a plurality of second tapered structure (134). The first and second tapered structures are provided on the light incident surface and are tapered in opposite directions. The present LCD lighting system also provides a surface light source (800) and a display device (900) using the light guide plate.
Claims16
A light guide plate having a block body, comprising:
- a light incident surface;
- a first light emitting surface and a second light emitting surface, the first and second light emitting surfaces being at opposite sides of the block body, the first and second light emitting surfaces adjoining the light incident surface;
- a plurality of first tapered projections provided on the light incident surface adjacent to the first light emitting surface, wherein a width of each first tapered projection relative to the light incident surface along a direction perpendicular to the light incident surface progressively decreases away from the first light emitting surface;
- and
- a plurality of second tapered projections provided on the light incident surface adjacent to the second light emitting surface, the second tapered projections being tapered in an opposite direction relative to the first tapered projections wherein a width of each second tapered projection relative to the light incident surface along a direction perpendicular to the light incident surface progressively decreases away from the second light emitting surface.
2 more elements
A surface light source comprising:
- a light guide plate comprising:
- a light incident surface;
- a first light emitting surface and a second light emitting surface, the first and second light emitting surfaces being at opposite sides of the light guide plate, the first and second light emitting surfaces adjoining the light incident surface;
- a plurality of first tapered projections provided on the light incident surface adjacent to the first light emitting surface, wherein a width of each first tapered projection relative to the light incident surface along a direction perpendicular to the light incident surface progressively decreases away from the first light emitting surface;
- and
- a plurality of second tapered projections provided on the light incident surface adjacent to the second light emitting surface, the second tapered projections being tapered in an opposite direction relative to the first tapered projections, wherein a width of each second tapered projection relative to the light incident surface along a direction perpendicular to the light incident surface progressively decreases away from the second light emitting surface;
- and
- a plurality of light sources disposed adjacent the light incident surface of the light guide plate.
5 more elements
A display device comprising:
- a light guide plate comprising:
- a light incident surface;
- a first light emitting surface and a second light emitting surface, the first and second light emitting surfaces being at opposite sides of the light guide plate, the first and second light emitting surfaces adjoining the light incident surface;
- a plurality of first tapered projections provided on the light incident surface adjacent to the first light emitting surface, wherein a width of each first tapered projection relative to the light incident surface along a direction perpendicular to the light incident surface progressively decreases away from the first light emitting surface;
- and
- a plurality of second tapered projections provided on the light incident surface adjacent to the second light emitting surface, the second tapered projections being tapered in an opposite direction relative to the first tapered projections, wherein a width of each second tapered projection relative to the light incident surface along a direction perpendicular to the light incident surface progressively decreases away from the second light emitting surface;
- a plurality of light sources adjacent the light incident surface;
- a main panel;
- and
- a sub panel, the main panel and the sub panel being mounted adjacent respective of the first and second light emitting surfaces.
7 more elements
Dependencies are inferred from the claim text.