Sheet type large display unit
US4970812A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1989 |
| Grant date | Nov 20, 1990 |
| Priority date | — |
| Expiry date | Oct 16, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F9/33
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sheet type large display unit includes a thin, flexible back sheet which is capable of being rolled up, the flexible back sheet having a plurality of electrical connections formed thereon in rows and columns; a plurality of display dot devices mounted on the front surface of the back sheet in a matrix arrangement, each display dot device including four light emitting diodes mounted on a printed circuit board substrate and connected with the electrical connections; a thin, flexible transparent display sheet which is capable of being rolled up, the display sheet being in covering relation to the display dot devices; and an adhesive which secures the peripheral edge of the display sheet in sealing relation to the peripheral edge of the back sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.