Vertically aligned pi-cell LCD having on-state with mid-plane molecules perpendicular to the substrates
US6067142A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1999 |
| Grant date | May 23, 2000 |
| Priority date | — |
| Expiry date | Jan 27, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13712
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal mode includes a layer of a liquid crystal material disposed between homeotropic alignment layers having a parallel alignment direction, the liquid crystal material including a negative dielectric anisotropic material. The liquid crystal material having a first state characterized by a vertical alignment of molecules which is substantially perpendicular to the alignment layers, and a second state which is characterized by the orientation of the molecules of the liquid crystal material which is oriented responsive to an electric field such that the molecules above a mid-plane of the liquid crystal material have a tilt in a first direction and the molecules below the mid-plane have a tilt opposite the first direction while the molecules adjacent the alignment layers and at the mid-plane remain substantially perpendicular to the alignment layers. The mid-plane is substantially parallel to the alignment layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.