Display device and method for driving the same

摘要

Discussed are a display device and a method for controlling the same, which are capable of achieving a reduction in power consumption, through selective application of a charge share mode or a pre-charge mode in accordance with the swing width of a data voltage. The disclosed method includes the steps of determining a positive or negative polarity of input image data on the basis of reference data and outputting a pre-charge enable signal when two successive image data have the same polarity; supplying a pre-charge voltage to a corresponding output channel in response to the pre-enable signal; and converting the image data into a data voltage, supplying the converted data voltage to a corresponding data line through the corresponding output channel.

主权项

1. A display device comprising:
a display panel, in which pixels are defined by intersection of a plurality of gate lines and a plurality of data lines; a timing controller for determining a positive or negative polarity of input image data on the basis of reference data and outputting a pre-charge enable signal when successive image data have a different polarity; a data driver for converting image data supplied from the timing controller into a data voltage, supplying the converted data voltage to the corresponding data line through a corresponding output channel, and supplying a pre-charge voltage to the corresponding output channel in response to the pre-charge enable signal; and a gate driver for supplying scan signals to the gate lines, respectively, wherein the timing controller comprises a pre-charge controller for selectively controlling the charge share mode and the pre-charge mode of the data driver, and wherein the pre-charge controller includes:
a polarity determiner for outputting a first polarity data when input image data is equal to or higher than the reference data, and outputting a second polarity data when the input image data is lower than the reference data, anda comparator for comparing polarity data of a current image data with polarity data of a previous image data, and if the compared polarity data are equal, the comparator outputs a pre-charge enable signal which indicates the pre-charge mode, and otherwise the comparator outputs a pre-charge enable signal which indicates the charge share mode.