Reduced power incandescent bar type display device
US4141161A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 1977 |
| Grant date | Feb 27, 1979 |
| Priority date | — |
| Expiry date | Jul 19, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R13/406
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A bar display comprising incandescent segmented display module presenting a plurality of dot positions to the viewer wherein a plurality of miniature incandescent lamps illuminate all the segments except one, the latter segment being illuminated by an elongated incandescent lamp capable of illuminating not only this one remaining segment but all segments or supplementing the miniature lamps depending on ambient light conditions. This arrangement permits a fully lighted dot position bar display with only one lamp thus saving power or permits a dot position bar display with each individual miniature lamp illuminated separately or a bar display responding to ambient lamp conditions, by utilizing only the elongated lamp alone or the elongated lamp plus the miniature lamps as desired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.