Displays having improved contrast
US5175637A · kind A · utility
59Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1991 |
| Grant date | Dec 29, 1992 |
| Priority date | — |
| Expiry date | Oct 15, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/65
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display presenting an image having enhanced contrast has a screen which switches between a bright, image-presenting state and a dark, image-less state, to minimize glare from ambient light reflections. Alternatively, a shutter which switches between a substantially transparent state and a dark, light absorbing state is placed over a conventional screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.