LCD device with vertically oriented liquid crystal section under no voltage condition
US6753939B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2002 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | May 24, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2413/08
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal display device where a liquid crystal section is vertically oriented with respect to both a first substrate capable of transmitting light and a second substrate which includes a reflecting region and a transmitting region. A pair of retardation films are disposed on both sides of the vertically oriented liquid crystal section, and have symmetrical phase characteristics over a visible wavelength region. Lagging phase axes of the pair of retardation films intersect each other, with an intersecting angle thereof being set in a range of from 90°±10°. Relative shifts in phase differences of the pair of retardation films are controlled within a range of ±30 nm. The reflective-and-transmissive liquid crystal display device makes it possible to provide, a high contrast and a high transmittance ratio in a transmission display mode and, a high contrast and a high reflection ratio in a reflection display mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.