Alphanumeric display means for computer-linked typewriter consoles using a plurality of planar gaseous discharge means within a unitary envelope containing an ionizable gas
US3934248A · 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 identification indicia attached adjacent to or at the selected key buttons. The light-emitting display unit means comprises a set of planar gas discharge means each including at least a pair of side-by-side indicator units aligned on a common side within a unitary transparent envelope containing an ionizable gas and selectively activated by means of controller switch means connected thereto. Result: a two-character display in a pattern of light corresponding to the alphanumeric indicia for which display is sought.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.