Self-aligned structures for improved wide viewing angle for liquid crystal displays
US6256080A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1999 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Jun 23, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133707
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In accordance with the present invention, a liquid crystal display cell includes a first substrate having a light absorbent material patterned thereon. The light absorbent material includes a portion disposed within a pixel area. A conductive layer is formed on the light absorbent material for forming a first transparent electrode. A second electrode is spaced apart from the first electrode by a gap. The gap includes liquid crystal. A ridge or a trench is formed in the pixel area and projects into the liquid crystal. The ridge or trench is self-aligned to the portions of the light absorbent material in the pixel area. The first electrode and the second electrode provide an electric field therebetween wherein the ridge or trench provides pretilt control for the liquid crystal to provide an improved wide viewing angle and the portions of the light absorbent material absorb light leaked from the ridge. Other embodiments for active and passive displays are included as well as a method for employing the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.