Thin backlight with recycling to reduce the bezel width

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United States of America Patent

PATENT NO 9921357
SERIAL NO

15188144

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Importance

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Abstract

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A backlight unit includes a lightguide, a light source that emits light to the lightguide, and a barrier layer positioned over the lightguide in a light emitting direction relative to the lightguide. The barrier layer defines a bezel area of the backlight unit, and an active area of the backlight unit from which light is emitted from the lightguide is an area adjacent to a boundary of the bezel area. A prism structure is positioned in the bezel area, wherein stray light emitted from the light source uncoupled to the lightguide is at least partially coupled into the lightguide by the prism structure or directed to a greater degree along the lightguide. The prism structure may be configured as a plurality of lenticular triangular prisms, and may be mounted to a mounting frame, back reflector, or flat panel connector of the backlight unit.

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Patent Owner(s)

Patent OwnerAddress
SHARP KABUSHIKI KAISHASAKAI-SHI OSAKA 590-8522

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ishida, Takeshi Osaka, JP 208 2345
Montgomery, David James Oxford, GB 83 1775
Watanabe, Hisashi Osaka, JP 222 2545

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