Display device with optical member having two parts in overlay relation to reflect light incident at particular angle
US5838404A · kind A · utility
13Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1995 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | Nov 1, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133567
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The display device using a transparent-scattering type liquid crystal element has such a structure that the light quantity to an observer is controlled as possible when a black image is provided, and a high efficiency of light is maintained in comparison with the conventional technique when a white image is provided. A prism array 2 is disposed at the back surface of the transparent-scattering type display element so that a sawteeth-like surface of the prism array 2 faces the display element 1, and a light absorber 3 is disposed at the back surface of the prism array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.