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US 2004/0062049 A1Published application
Display device by columnar light
AssigneeAPT, Inc.
InventorYoshihiko Awa
Life of this patent
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Abstract
A display system comprising a high-intensity discharge lamp system equipped with a stabilizer, a reflector mirror coated with a heat-absorption film, a shutter, and a light-gathering lens; and a pole holding the high-intensity discharge lamp system at a desired height above the road or its vicinity. The display system of the invention enables drivers to easily see and locate the centerline, road shoulder, crosswalk, and traffic signs, even in the midst of rainstorm, dense fog, or blizzard.
Claims4
A display device using columnar light comprising:
- a high-intensity discharge lamp system equipped with a stabilizer, a reflector mirror coated with a heat-absorption film, a shutter, and a light-gathering lens;
- and
- a pole holding the high-intensity discharge lamp at a desired height above the road or its vicinity,
- wherein the shutter is placed at the primary focal point of the high-intensity discharge lamp, and the light choked by the shutter is gathered by the lens to illuminate the road or its vicinity.
1 more element
Dependencies are inferred from the claim text.