SEGMENTED BACKLIGHT STRUCTURE WITH IN-COUPLING STRUCTURES
First Claim
1. A LED backlight system, comprising:
- a plurality of backlight segments, each backlight segment supporting a sidelight emitting LED;
a light guide segment included in each backlight segment, with the light guide having a rectangular shape and a flat top surface, the light guide further defining a cavity having a top and sidewalls, with the sidelight emitting LED positionable in the cavity; and
a sidewall in-coupling structure is positioned between the sidewalls of the cavity and the sidelight emitting LED, andwherein each sidelight emitting LED is centrally positioned in the respective backlight segment.
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Abstract
An LED backlight system having a plurality of backlight segments including an integral light waveguide, each backlight segment supporting a sidelight emitting LED. A light guide can have a rectangular shape, a flat top surface, and a curved lower surface that defines a cavity having a top and sidewalls, with the sidelight emitting LED positioned in the cavity. The cavity sidewalls can include light in-coupling structures such as prisms. In one embodiment, each sidelight emitting LED can be rotated with respect to a rectangular cavity, with edges of the sidelight emitting LED facing corners of rectangular cavity. At least one of a reflective layer and a top out-coupling structure can be positioned between the top of the cavity and the sidelight emitting LED.
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Citations
9 Claims
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1. A LED backlight system, comprising:
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a plurality of backlight segments, each backlight segment supporting a sidelight emitting LED; a light guide segment included in each backlight segment, with the light guide having a rectangular shape and a flat top surface, the light guide further defining a cavity having a top and sidewalls, with the sidelight emitting LED positionable in the cavity; and a sidewall in-coupling structure is positioned between the sidewalls of the cavity and the sidelight emitting LED, and wherein each sidelight emitting LED is centrally positioned in the respective backlight segment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification