Self light-emitting retroreflective sheet and method for producing the same
US6166856A · kind A · utility
26Cited by
25References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1998 |
| Grant date | Dec 26, 2000 |
| Priority date | — |
| Expiry date | Jun 15, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/124
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides a self light-emitting retroreflective sheet including a light-transmitting retroreflective element including a plurality of prismatic projections, a lining film, and an electroluminescence device. The lining film includes a light-transmitting film which has sealing projections on one of its surfaces so that the prismatic projections are confined within a plurality of sealed cells formed by the sealing projections. In the sealed cells, a surface of the prismatic projections interface with air so as to increase light-emitting luminance and improve its uniformity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.