Numerical and non-numerical display system for a small calculator
US4219808A · kind A · utility
1Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 1978 |
| Grant date | Aug 26, 1980 |
| Priority date | — |
| Expiry date | Aug 9, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A numerical display system for use in a small calculator has a multi-digit numerical display device for selectively energizing a plurality of segments to display alphanumeric characters, first drive circuit for causing the numerical display device to display a denominator and a numerator at a time, and second drive circuit for causing a denominator-numerator distinction symbol to be displayed between the denominator and the numerator by the selective energization of the plurality of segments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.