DIRECTIONAL BACKLIGHTING FOR DISPLAY PANELS
First Claim
Patent Images
1. A backlight system for a display panel, the backlight system comprising:
- a wedge-shaped light guide comprising a thin end and a thick end, the thick end of the wedge-shaped light guide comprising a linear reflector with plurality of facets; and
a plurality of light sources arranged along the thin end of the wedge-shaped light guide.
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Accused Products
Abstract
Various embodiments are disclosed that relate to display panel backlight systems that output light with a narrower angular intensity distribution than a diffuse backlight. For example, one disclosed embodiment provides a backlight system comprising a wedge-shaped light guide comprising a thin end and a thick end, the thick end of the wedge-shaped light guide comprising a linear reflector with plurality of facets, and wherein the backlight system also comprises a plurality of light sources arranged along the thin end of the wedge-shaped light guide.
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Citations
20 Claims
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1. A backlight system for a display panel, the backlight system comprising:
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a wedge-shaped light guide comprising a thin end and a thick end, the thick end of the wedge-shaped light guide comprising a linear reflector with plurality of facets; and a plurality of light sources arranged along the thin end of the wedge-shaped light guide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 17, 19, 20)
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11. A display device, comprising:
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a modulating image display panel; and a backlight system configured to backlight the modulating image display panel, the backlight system comprising; a wedge-shaped light guide comprising a thin end and a thick end, the thick end of the wedge-shaped light guide comprising a linear reflector with plurality of facets; a plurality of light sources arranged along the thin end of the backlight system and configured to be illuminated together; and a turning structure disposed on an exit surface of the wedge-shaped light guide to redirect light emitted from the exit surface of the wedge-shaped light guide, the turning structure comprising a plurality of facets each having an angle with respect to a turning structure surface normal, wherein the angles of the facets vary as a function of facet position on the turning structure. - View Dependent Claims (12, 13, 14, 15, 16)
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18. A method of operating a backlit display device, comprising:
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illuminating a plurality of light sources to inject light into a thin end of an wedge-shaped light guide at multiple locations along a length of the thin end of the wedge-shaped light guide; internally reflecting the light via a linear reflector disposed at a thick end of the wedge-shaped light guide; emitting the light from the wedge-shaped light guide; and directing the light emitted from the light guide through a modulating display panel to produce a displayed image.
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Specification