Display device by columnar light
US6739741B2 · kind B2 · utility
1Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 26, 2002 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Sep 26, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/095
- WIPO fieldControl
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.