Local light-emitting road sign board apparatus
US10410550B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Feb 1, 2016 |
| Grant date | Sep 10, 2019 |
| Priority date | — |
| Expiry date | Mar 20, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F2013/1872
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A local light-emitting road sign board apparatus is disclosed. Local light-emitting panels, displaying road guides in the form of a character, numeral, symbol, or figure, are independently inserted and installed in openings for road sign units that are provided in a main substrate. A sub substrate and a retroreflective sheet are laminated and bonded on each local light-emitting panel so as to form a road sign unit. A retroreflective sheet is also bonded on the main substrate so as to form the background of a road sign unit. When one of road sign units fails, it is possible to simply separate, repair or replace, and reinstall only the failed road sign unit while leaving the others intact.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.