Solid state sunlight readable illuminated display device

Details Solid state sunlight readable illuminated display device Solid state sunlight readable illuminated display device

F - Mech Eng,Light,Heat,Weapons

21

K

240/127

F21K 2/00 (2006.01) B60Q 3/04 (2006.01) G09F 13/08 (2006.01) G09F 13/20 (2006.01)

Patent

CA 2023422

ABSTRACT OF THE DISCLOSURE A solid state sunlight readable, night vision compatible display device in which a legend, of which at least a portion is translucent, is back lit by a fluorescent coating on a electroluminescent light source. Under high ambient light conditions the fluorescent coating is energized primarily by ambient light transmitted through the legend. Under low ambient light conditions the fluorescent coating is energized primarily by light from the electroluminescent light source. A solid state shutter whose operation is coordinated with that of the light source is provided in front of the legend to prevent undesired message displays when the display device is "off".

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