Active-matrix type liquid crystal display device and method of compensating for defective pixel
US6175393A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1996 |
| Grant date | Jan 16, 2001 |
| Priority date | — |
| Expiry date | Aug 20, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/136272
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Auxiliary lines are formed under pixel electrodes so as to be parallel to signal lines. The auxiliary lines are connected to the signal lines at one point for each pixel. This permits a voltage to be kept applying to a signal line even if a disconnection defect occurs in the signal line by making a circuit around a disconnected portion by the auxiliary line. Moreover, if a leakage defect occurs at a crossing point between the scanning line and the signal line, the signal line would be cut off on both sides of the scanning line. This also permits a voltage to be kept applying to the signal line by the auxiliary line. By setting the auxiliary lines narrower than the signal line, a reduction in aperture ratio can be suppressed, and by adopting the auxiliary lines made of a transparent electrically conductive material such as ITO, etc., it is possible to prevent the reduction in aperture ratio due to the auxiliary lines. The described arrangement permits a generation of a line-shaped defect due to disconnection to be prevented while improving an aperture ratio of the pixel with ease.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.