Liquid crystal display device
US8064018B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2007 |
| Grant date | Nov 22, 2011 |
| Priority date | — |
| Expiry date | Dec 24, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/134345
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Each pixel region includes two subpixel regions, in which different voltages are applied to a liquid crystal layer with respect to a signal voltage supplied from a source bus line by way of TFTs. A first substrate includes a first electrode provided for the two subpixel regions. A second substrate includes a second electrode that faces the first electrode with a vertical alignment liquid crystal layer interposed. A liquid crystal capacitor is provided for each of these subpixel regions. Each subpixel region includes at least one liquid crystal domain that produces a dark area, which looks darker than a gray scale tone being presented for a viewer located in front of the device, inside of, and substantially parallel to, an edge portion of the first electrode. At least a part of the edge portion of the first electrode is arranged so as to overlap with a gate bus line and selectively shield at least a part of the dark area. Two TFTs associated with the two subpixel regions have substantially equal drain-gate capacitances Cgd, thus providing a VA mode liquid crystal display device that achieves good display quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.