Integrated injection logic electronic system with voltage regulator for multiplexed liquid crystal display
US4189909A · kind A · utility
20Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 22, 1978 |
| Grant date | Feb 26, 1980 |
| Priority date | — |
| Expiry date | May 22, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/225
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic system such as an electronic timepiece includes multi-level, integrated injection circuitry and a multiplexed liquid crystal display. A low-power voltage regulator is provided for driving the liquid crystal display and a current regulator is provided for driving the integrated injection logic circuitry. The current regulator is stacked between the logic levels in order to provide a fractional regulated voltage for driving the liquid crystal display without additional circuit elements and associated current drain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.