Liquid crystal display device, method of correcting defective pixels, and defective-pixel correcting apparatus used therein
US5267066A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1992 |
| Grant date | Nov 30, 1993 |
| Priority date | — |
| Expiry date | Mar 26, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/508
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a liquid crystal display device having pixels arranged in a matrix form, light is allowed to pass or blocked depending upon whether or not a voltage is applied to electrodes each corresponding to the pixels, and the display operation is conducted by controlling the transmission/nontransmission of light. When a conductor or switching element connected to an electrode is broken, it is not possible to apply such a voltage to the respective electrode. Such a pixel is always at the light transmission display state, with the result that the pixel becomes a bright spot, thereby degrading the display quality. Therefore, a blocking piece for blocking light is disposed over the pixel which becomes a bright spot. This prevents the bright spot from appearing, thereby improving the display quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.