Alphanumeric display means for computer-linked typewriter consoles using a matrix array of liquid-crystal devices
US3934242A · kind A · utility
7Cited by
2References
2Claims
0Family size
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 identification indicia attached adjacent to or at the selected key buttons. Each display is in matrix format consisting of a set of liquid-crystal devices arranged in orthogonal rows and columns. Energization of each set of liquid-crystal devices is via digital control circuitry. Result: a repetitive display in matrix format in a configuration corresponding to an alphanumeric indicium for which display is sought.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.