Liquid crystal display device and partial transmission type liquid crystal display device
US7259817B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 2002 |
| Grant date | Aug 21, 2007 |
| Priority date | — |
| Expiry date | Jun 27, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2413/08
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention is configured so that it has a first substrate, a second substrate, a liquid crystal layer pinched between the first substrate and second substrate, and a driving unit, wherein a characteristic of a reflectivity versus an applied voltage is a normally closed type and a characteristic of a transmissivity versus an applied voltage is the normally closed type: wherein the first substrate has a common electrode, and an upside polarization plate and upside phase plate on an upper surface; wherein the second substrate has a reflective electrode and transparent electrode connected with an active element, and a downside polarization plate and downside phase plate on a lower surface; wherein the liquid crystal layer has a twist angle not less than 40 degrees and not more than 65 degrees; wherein a retardation of the liquid crystal layer in a reflective display unit is within a range of not less than 230 nm and not more than 300 nm; and wherein a retardation of the liquid crystal layer in a transmissive display unit is larger than the retardation of the liquid crystal layer in the reflective display unit. Thus, is obtained a display that is more luminous and wider in a …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.