Liquid crystal display device and data line drive circuit of liquid crystal display device
US6154192A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1998 |
| Grant date | Nov 28, 2000 |
| Priority date | — |
| Expiry date | Apr 21, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A liquid crystal display device and a data line drive circuit of the same capable of individually reducing offsets between a video signal input and outputs, reducing a difference of offsets among outputs, and accordingly obtaining a good image quality, provided with a plurality of output blocks provided with sample-and-hold circuits connected in series for sampling the input video signal and holding the sampled data for a constant period; a drive circuit for outputting the held data of the sample-and-hold circuit as a signal of a predetermined level; and an output level adjustment circuit for comparing voltages V1 and V2 set in the switching period of the horizontal synchronization signal in the input video signal and an output signal voltage of the drive circuit and adjusting the level of the output signal of the drive circuit to a constant level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.