Display device
US4257084A · kind A · utility
175Cited by
9References
8Claims
0Family size
Inventor
Key dates
| Filing date | Feb 21, 1979 |
| Grant date | Mar 17, 1981 |
| Priority date | — |
| Expiry date | Feb 21, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/80
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light-projection device for digital instrumentation consists of a one-piece body including reflective and diffusive surfaces and a chamber to locate a plurality of sources of varicolored light. Light from the sources is diffused to fill an entire line segment of the seven in a typical digit, with varicolored sources of light affording the potential for polychromatic display, thus enhancing the data with color to signify danger, normality, negative values, et cetera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.