Vacuum fluorescent display system, digital power supply
US4704560A · kind A · utility
9Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1986 |
| Grant date | Nov 3, 1987 |
| Priority date | — |
| Expiry date | Oct 6, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/06
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital pulsewidth modulator switch regulator is used in a power supply for a multisection vacuum fluorescent display system. Pulsewidth modulations are based on grid and anode load characteristics of each section of the display, stored prior to system operations in a designated location of memory of a microcomputer used for controlling switching regulations. Display voltage updates are made utilizing the stored data as well as new load data derived from the power supply output voltage feedback signals indicative of changes in the display voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.