Method of driving liquid crystal panel, and liquid crystal display apparatus
US6538630B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1999 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Mar 23, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0223
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A liquid crystal display apparatus drives an active-matrix liquid crystal panel by the use of the line reversal driving method. To do so, a common driver AC-drives one of a pair of electrode in each of all the pixels of the liquid crystal panel. An adding circuit obtains the sum of a plurality of gradation components for deciding the gradations of the pixels in one of the columns in the liquid crystal panel at intervals of the predetermined horizontal period. A voltage setting portion in a source driver corrects a reference voltage difference 66 Vref on the basis of the sum at intervals of the horizontal period, divides the corrected reference voltage difference 66 Vrefa, decides a plurality of gradation voltages, and selects voltages to be applied to a plurality of data lines in the liquid crystal panel from among the gradation voltages based on the plurality of gradation components. The selected plurality of voltages are applied to the plurality of data lines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.