NVIS compatible backlight device and electronic display using the same
AssigneeAmerican Panel Corporation
InventorsWilliam Dunn, Harry Presley, Chris Tran
Life of this patent
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Abstract
A backlight assembly includes a substantially planar light guide defining an upper, lower, and first side surface. A first plurality of LEDs is positioned to emit light into the lower surface. A NVIS filter is placed adjacent to, and a second plurality of LEDs is positioned near to, the first side surface. A directing element extends between the second plurality of LEDs and the NVIS filter and directs the emitted light from the second plurality of LEDs through the NVIS filter and into the light guide. The NVIS filter extends substantially perpendicular from a support structure associated with the light guide.
Claims20
A backlight assembly comprising:
- a substantially planar light guide defining an upper surface, a lower surface, and a first side surface;
- a first plurality of lighting elements positioned below the lower surface of the light guide and oriented to direct light emitted from the first plurality of lighting elements into the lower surface;
- a NVIS filter placed adjacent to the first side surface;
- a second plurality of lighting elements positioned adjacent to the first side surface;
- a directing element extending between the second plurality of lighting elements and the NVIS filter to direct light emitted from the second plurality of lighting elements through the NVIS filter and into the light guide;
- and
- a support structure in association with said light guide, wherein said NVIS filter extends substantially perpendicular from said support structure.
An electronic display assembly comprising:
- a liquid crystal layer;
- a substantially cuboid light guide in association with said liquid crystal layer;
- a first plurality of LEDs positioned to direct light emitted from the first plurality of LEDs into a lower surface of said light guide;
- a NVIS filter placed adjacent to a side surface of said light guide;
- a second plurality of LEDs positioned adjacent to the side surface;
- a separating element extending between the first plurality of LEDs and the second plurality of LEDs;
- a directing element extending between the second plurality of LEDs and the NVIS filter, wherein said directing element is configured to direct light emitted from the second plurality of LEDs through the NVIS filter and into the light guide;
- wherein said light guide is configured to direct light emitted therein to the liquid crystal layer.
A backlight assembly comprising:
- a substantially cuboid light guide defining an upper surface, a lower surface, a first side surface, and a second side surface;
- a first plurality of LEDs positioned below the lower surface of the light guide and oriented to direct light emitted from the first plurality of LEDs into the lower surface;
- a first NVIS filter placed adjacent to the first side surface;
- a second plurality of LEDs positioned adjacent to the first NVIS filter;
- a separating element extending between the first plurality of LEDs and the second plurality of LEDs;
- a directing element comprising a curved, reflective surface extending between the second plurality of LEDs and the first NVIS filter to direct light emitted from the second plurality of LEDs through the first NVIS filter and into the first side surface of the light guide;
- a second NVIS filter placed adjacent to the second side surface;
- a third plurality of LEDs positioned adjacent to the second NVIS filter;
- a second separating element extending between the first plurality of LEDs and the third plurality of LEDs;
- and
- a second directing element comprising a curved, reflective surface extending between the third plurality of LEDs and the second NVIS filter to direct light emitted from the third plurality of LEDs through the second NVIS filter and into the second side surface of the light guide.
Dependencies are inferred from the claim text.