Display device for D/A conversion using load capacitances of two lines

Abstract

A display device that uses the load capacitances of two signal lines to perform DA conversion is disclosed. Serial digital/analog conversion circuits (SDAC) that are provided in a data driver are provided for every two adjacent signal lines and use the load capacitances of these two signal lines to successively convert to analog data those data from, of the parallel/serial conversion circuits (PSC), PSC that correspond to the pixels of odd-numbered pixel columns and apply the converted analog data to the pixels of odd-numbered pixel columns, and successively apply data from PSC that correspond to the pixels of even-numbered pixel columns to the pixels of even-numbered pixel columns. Because the source of error of the SDAC is determined only by the difference between the two load capacitances, a liquid crystal display device may be constructed from polysilicon and the characteristics of the TFT may consequently show fluctuation, but these factors will not act as a source of output error of the SDAC. The invention therefore enables highly accurate DA conversion that is less affected by the influence of the load capacitances of signal lines.

Dependencies are inferred from the claim text.