Electrophoretic display and driving method thereof

An electrophoretic display device sequentially driven during a data updating period when a data is updated and a sleeping 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 a data voltage to the data lines during the data updating period;
• a gate driving circuit supplying a scanning pulse swung between a gate high voltage and a gate low voltage to the gate lines during the data updating period;
• and
• a controller sequentially converging voltages of the data lines and of the common electrode to a ground voltage during the sleeping 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 connects an output terminal at each of the data lines to a ground voltage source 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.

A method of driving an electrophoretic display device including 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, the method comprising:

• supplying a data voltage to the one of data lines during a data updating period;
• supplying a scanning pulse to the one of the gate lines during the data updating period and
• sequentially raising the plurality of the data lines, the common electrode, and the plurality of the gate lines into a high impedance state in a sleeping period following the data updating period,
• wherein a voltage of the data lines maintains a level of the data voltage supplied to the data lines for a source holding time of about 2 μs, a gate low voltage supplied to the gate lines is lower after the data updating period and the common electrodes maintain the common voltage supplied to the common electrode 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.

A method of driving an electrophoretic display device including 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, the method comprising:

• supplying a data voltage to one of the data lines during a data updating period;
• supplying a scanning pulse swung between a gate high voltage and a gate low voltage to one of the gate lines during the data updating period;
• and
• sequentially converging voltages of the gate lines and of the common electrode into a ground voltage in a sleeping period following the data updating period,
• wherein a voltage of the data lines maintains a level of the data voltage supplied to the data lines for a source holding time of about 2 μs, a gate low voltage supplied to the gate lines is lower after the data updating period and the common electrodes maintain the common voltage supplied to the common electrode 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.