Illuminated liquid/crystal display device using internal reflection and scattering
US4626074A · kind A · utility
27Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1984 |
| Grant date | Dec 2, 1986 |
| Priority date | — |
| Expiry date | Apr 30, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133616
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A relatively shallow arrangement for providing illumination for a light scattering type display cell employs a transparent sheet in optical contact with the front surface of the cell and a matte black sheet out of contact with the rear surface. The assembly acts as a light guide for light launched into at least one of the transparent sheet from at least one strip lamp. The only light escaping from the display, etc. in the direction of the observer is a proportion of that scattered into non-guided directions by regions of liquid crystal layer selectively set into a scattering state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.