Patent ID: 8228289

Claim:
A display device comprising: an electrophoretic display panel that has two types of electrophoretic elements of different color and polarity disposed between electrodes, and that changes display state according to an applied voltage in a first direction from a first color to a second color and a second direction from the second color to the first color; and drive means for driving the electrophoretic display panel by applying a voltage between the electrodes, the drive means including storage means for storing color transition information correlating the color levels displayed by the electrophoretic elements to a positive voltage color level that is displayed when a positive voltage pulse is applied and a negative voltage color level that is displayed when a negative voltage pulse is applied to the electrode connected to the electrophoretic elements displaying a particular color level, target value setting means for setting a target value of a target color to be displayed by the electrophoretic elements, the color transition information denoting how many of one of positive or negative voltage pulses are needed to change from a first color to the target color, the target color being selected from selectable target colors which are prescribed for the display device to display, the number of the selectable target colors being less than the number of the displayable colors, the selectable target colors including at least a first selectable target color as the target color is substantially equal to the negative voltage color level to attain the first selectable target color as the target color, and pulse applying means for applying one of a positive or negative voltage pulse of a specific voltage level to the electrodes from a current color with a current value to the target color, the pulse applying means including a value determination unit for determining if the current value and the target value match, a pulse application unit for applying either a positive voltage pulse or a negative voltage pulse to the electrode on the basis of the color transition information when the current color is the first color so that the current value approaches the target value when the value determination unit determines the current value and the target value do not match, a transition value acquisition unit for getting from the color transition information a transition value denoting a color level after the pulse is applied, a current value updating unit for updating the current value to the transition value, the target value being substantially same color in both the first and second directions.