NVIS COMPATIBLE BACKLIGHT DEVICE AND LCD USING THE SAME

摘要

Exemplary embodiments provide an electronic display assembly comprising a liquid crystal layer and a light guide positioned behind the liquid crystal layer. The light guide preferably includes a light emission surface and a light-collecting portion opposing the light emission surface. A pair of opposing side portions may define the periphery of the light guide. A first plurality of LEDs are placed so as to direct the emitted light into the light-collecting portion. An NVIS filter is preferably placed adjacent to at least one of the side portions. A second plurality of LEDs are placed to direct the emitted light through the NVIS filter and into a side portion of the light guide. Alternative embodiments can contain directing elements to direct the light from the second plurality of LEDs into the edge portions of the light guide.

主权项

1. An electronic display assembly comprising:
a liquid crystal layer; a substantially planar light guide positioned behind the liquid crystal layer and comprising:
a light emission surface;a light-collecting portion opposing the light emission surface;four edge portions defining a periphery of the planar light guide; a first plurality of LEDs positioned within a first plane in a direct-lit orientation and arranged to direct the emitted light from the first plurality of LEDs into the light-collecting portion; a first NVIS filter placed adjacent to the light guide; and a second plurality of LEDs positioned within the first plane and near an edge portion, arranged to direct the emitted light from the second plurality of LEDs through the NVIS filter and into the light guide.