Liquid crystal display device
US6816221B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2003 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | Jun 6, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/136286
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An active matrix type liquid crystal display device includes, in each pixel, a semiconductor layer of a thin film transistor, a first insulating film formed on the semiconductor layer, a gate line formed on the first insulating film, a second insulating film formed on the gate line, and a drain line formed on the second insulating film. The bottom side of the gate line is opposed to the semiconductor layer with the first insulating film interposed therebetween, and the top side of the gate line is covered with a metal electrode formed on the second insulating film by the same process as used to form the drain line, whereby leakage electric fields from the gate line are shielded. Particularly when an IPS type liquid crystal display device using low temperature poly silicon TFTs is constructed in the above-described manner, a wide viewing angle and a bright display image are obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.