Alphanumeric display means for computer-linked typewriter consoles using fluorescent luminescent alphanumeric indicating means
US3934244A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 5, 1973 |
| Grant date | Jan 20, 1976 |
| Priority date | — |
| Expiry date | Nov 5, 1993 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/969
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention relates to an alphanumeric display unit means for improving the identification quantities at selected key buttons of a computer-linked typewriter console through usage of light-emitting indentification indicia attached adjacent to or at the selected key buttons. The light-emitting display means comprises a set of fluorescent luminescent alphanumeric display means each including a pair of side-by-side indicating units. The last-mentioned units are arranged so as to include an array of fluorescent segments formed on a common side of an insulating plate within a transparent envelope containing an ionizable gas. In operation, each pair of side-by-side indicating units is selectively activated by means of controller switch means connected thereto. Result: a luminescent two-character display in a fluorescent pattern of light corresponding to the alphanumeric indicia for which display is sought.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.