Patent ID: 8264454

Claim:
An electrophoretic display device sequentially driven during a data updating period when a data is updated and a sleep-mode period when a data is maintained, comprising: an electrophoretic display panel including a plurality of data lines crossing a plurality of gate lines to form a plurality of cells, a plurality of pixel electrodes, a common electrode for driving each of the plurality of cells, and a TFT at a crossing of one of the data lines and one of the gate lines to supply a data voltage from the one of the data lines to a corresponding one of the pixel electrodes; a data driving circuit supplying the data voltage to the data lines during the data updating period; a gate driving circuit supplying a scanning pulse to the gate lines during the data updating period; and a controller sequentially raising an impedance of each of the data lines, the common electrode, and the gate lines during the sleep-mode period, wherein the data driving circuit maintains the data voltage unchanged under control of the controller for a source holding time of about 2 μs and opens an output terminal connected to the data lines under control of the controller in the sleep-mode immediately after the source holding time, wherein the gate driving circuit lowers voltages of the gate lines to a gate low voltage of the scanning pulse under control of the controller after the data updating period and a common voltage supplied to the common electrode is maintained after the data updating period, wherein the data updating period includes a reset period including a first interval to generate a data voltage of high potential voltage and a second interval to generate a data voltage of 0V, a first stabilization period, a second stabilization, and a data writing period, wherein the data writing period includes a third interval to generate a data voltage of low potential voltage, and a fourth interval to generate a data voltage of 0V, wherein a number of frames of the first interval is determined in accordance with the current data gray scale, and wherein a number of frames of the third interval is determined in accordance with the next data gray scale.