Liquid crystal display device

摘要

A liquid crystal display device includes a plurality of pixel circuits, data lines, and a data-line driving circuit connected to the data lines. Each of the pixel circuits includes a pixel capacitance having one end provided with a common potential. In accordance with a grayscale value for one of the plurality of pixel circuits, the data-line driving circuit selectively outputs a positive-polarity signal and a negative-polarity signal to the one pixel circuit. The data-line driving circuit outputs the positive-polarity signal and the negative-polarity signal so that an average of a potential of the positive-polarity signal and a potential of the negative-polarity signal corresponding to the grayscale value changes in accordance with the grayscale value, a temperature, and a position of the one pixel circuit.

主权项

1. A liquid crystal display device, comprising:
a plurality of pixel circuits arranged in a matrix; a plurality of data lines provided so as to correspond to rows of the plurality of pixel circuits; a plurality of scanning lines provided so as to correspond to columns of the plurality of pixel circuits; a data-line driving circuit for providing a signal to the plurality of data lines; and a scanning-line driving circuit for providing a scanning signal to the plurality of scanning lines, wherein: each of the plurality of pixel circuits comprises:
a pixel capacitance having one end provided with a common potential; anda pixel transistor having a gate electrode provided with the scanning signal from one of the plurality of scanning lines, corresponding to the pixel circuit, and a source electrode and a drain electrode, one of the source electrode and the drain electrode being connected to another end of the pixel capacitance and another of the source electrode and the drain electrode being connected to one of the plurality of data lines, corresponding to the pixel circuit; the data-line driving circuit selectively outputs any one of a combination of a positive-polarity precharge signal and an image signal subsequent to the positive-polarity precharge signal and a combination of a negative-polarity precharge signal and an image signal subsequent to the negative-polarity precharge signal to the corresponding one of the plurality of data lines in accordance with a grayscale value for the corresponding one of the plurality of pixel circuits; the data-line driving circuit outputs the positive-polarity precharge signal and the negative-polarity precharge signal so that an average of a potential of the positive-polarity precharge signal and a potential of the negative-polarity precharge signal corresponding to the grayscale value changes in accordance with any one of the grayscale value, temperature, a distance to the corresponding one of the plurality of pixel circuits from the scanning-line driving circuit, and a distance to corresponding the one of the plurality of pixel circuits from the data-line driving circuit; a potential of the image signal is determined in accordance with the grayscale value; and the data-line driving circuit outputs the precharge signals so that a potential difference between the potential of the precharge signal and the potential of the image signal, each signal having any one of the positive polarity and the negative polarity, corresponding to the gradation value changes as the grayscale value increases until the grayscale value becomes equal to a change limit grayscale value corresponding to a grayscale value at which the potential difference becomes equal to a predetermined value and a change amount of the potential difference after the grayscale value exceeds the change limit grayscale value is smaller than before the grayscale value exceeds the change limit grayscale value.