TFT-LCD using multi-phase charge sharing
OwnerOh-kyong Kwoninventor
Life of this patent
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Abstract
There is provided a TFT-LCD using multi-phase charge sharing, in which odd-numbered source lines and even-numbered source line are connected to an external capacitor through a switching element during a period of multi-phase charge sharing time, to share the charges charged in the source lines. The TFT-LCD includes: a source driver for outputting video data signals each of which corresponds to one pixel through a plurality of source lines; switching elements for multi-phase charge sharing; and an external capacitor, connected between a liquid crystal panel and the source driver, for collecting charges of a source line having a voltage higher than a common electrode voltage and supplying them to a source line having a voltage lower than the common electrode voltage when the source lines are connected thereto.
Claims6
A TFT-LCD using multi-phase charge sharing, which includes a source driver for outputting video data signals each of which corresponds to one pixel through a plurality of source lines, and a liquid crystal panel for expressing the video signal supplied through the source lines, comprising:
- an external capacitor, connected between the source driver and the liquid crystal panel, for collecting charges of source lines having a voltage higher than a common electrode voltage and supplying them to source lines having a voltage lower than the common electrode voltage when the source lines are connected thereto;
- a transfer gate section for connecting each of the source lines to a line driver according to a driving signal;
- first and second switching sections for connecting each source line to the external capacitor according to first and second selection signals, respectively;
- and
- a third switching section for connecting adjacent source lines with one another according to a third selection signal.
Dependencies are inferred from the claim text.