Ultra-thin backlight
First Claim
1. An apparatus for use with a display device comprising:
- a wave guide having at least one edge, first and second faces, the first face being disposed proximate to the display device and the second face including a doubly curved wedge light guiding arrangement having an inclination angle that diminishes as a function of distance from a light source along both an X and Y coordinate axis;
at least one light source coupled to the wave guide;
a light extraction device disposed integrally to one of the faces; and
a reflector disposed proximate to at least one of the faces.
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Accused Products
Abstract
A backlight for a display device, such as a liquid crystal display device, includes a light guiding plate having a front and a rear surface. The front and rear surfaces may be parallel to one another, or may instead be non-parallel. To the extent that such surfaces are non-parallel, one surface may be inclined at a single, or multiple angles with respect to the other surface. The backlight further includes a light source that is coupled to an edge of the light guiding plate by means of an energy conserving coupling section, and which provides light that is conditioned and transmitted through the light guiding plate. Light extractors are disposed on at least one side of the light guiding plate to assist in the transmission and conditioning of the light that is provided to the light guiding plate by the light source.
93 Citations
20 Claims
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1. An apparatus for use with a display device comprising:
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a wave guide having at least one edge, first and second faces, the first face being disposed proximate to the display device and the second face including a doubly curved wedge light guiding arrangement having an inclination angle that diminishes as a function of distance from a light source along both an X and Y coordinate axis; at least one light source coupled to the wave guide; a light extraction device disposed integrally to one of the faces; and a reflector disposed proximate to at least one of the faces. - View Dependent Claims (2, 3, 4)
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5. An apparatus comprising:
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a display device; a wave guide having a first face disposed proximate to the display device and a second face including doubly curved wedge light guiding arrangement; at least one light source; at least one foconic coupler disposed between the light source and the second face of the wave guide; a light extraction device integrally disposed along at least one of the faces of the wave guide; and a reflector disposed proximate to the wave guide wherein light is injected into the foconic coupler by the light source in a first direction, exits the foconic coupler in a second direction, and exits the wave guide in a third direction.
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6. A liquid crystal display device comprising:
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a liquid crystal display module; a backlight structure including; a light source, a wave guide including a first and a second face, a foconic coupler disposed between the light source and the wave guide, a reflector disposed proximate to one of the faces of the wave guide, wherein light is injected into the foconic coupler by the light source in a first direction, exits the foconic coupler in a second direction and exits the wave guide in a third direction, wherein the foconic coupler includes a central crater section having a reduced thickness and the foconic coupler has a compound elliptic-hyperbolic shape. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification