Device for improving the contrast of a liquid crystal screen and its method of manufacture through the use of opaque bands
US5576859A · kind A · utility
8Cited by
9References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 29, 1994 |
| Grant date | Nov 19, 1996 |
| Priority date | — |
| Expiry date | Aug 29, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133512
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device for improving a contrast of a liquid crystal screen by using an opaque mask. The display screen includes a first plate, on one face of which are deposited elements with controlled transparence or reflectance and thin film components controlling these elements, and a back plate covering a face of the first plate including the elements with controlled transparence or reflectance and the thin film components. The elements are separated by opaque bands into lines and columns forming a grid. The opaque bands are deposited at least partially on the plate including the elements and the thin film components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.