Stereoscopic image display device and driving method thereof

A driving method of a stereoscopic image display device including a display panel which is provided with data lines, gate lines intersecting the data lines, and the pixels arranged in a matrix in pixel regions defined by the data lines and the gate lines, the method comprising:

• electrically controlling liquid crystal shutter glasses to alternately open a left eye shutter and a right eye shutter of the liquid crystal shutter glasses;
• supplying left eye image data voltages to the data lines during a data addressing period set in an N-th (where N is a natural number) frame period and connecting neighboring data lines with each other to make the data lines short-circuited during a black grayscale inserting period set in the N-th frame period, and supplying right eye image data voltages to the data lines during a data addressing period set in a (N+1)-th frame period and connecting neighboring data lines with each other to make the data lines short-circuited during the black grayscale inserting period set in the N-th frame period;
• sequentially supplying a first gate pulse to the gate lines during the data addressing period and a second gate pulse to the gate lines during the black grayscale inserting period;
• and
• providing light to the display panel using a backlight unit,
• wherein in the operation of electrically controlling of the liquid crystal shutter glasses, only the left eye shutter is opened during the data addressing period set in an N-th frame period, and then the left eye shutter is closed and the right eye shutter is opened during the black grayscale inserting period set in the N-th frame period,
• wherein only the right eye shutter is opened during the data addressing period set in a (N+1)-th frame period, and then the right eye shutter is closed and the left eye shutter is opened during the black grayscale inserting period set in the (N+1)-th frame period, and
• wherein, in the operation of providing of light, the backlight unit is turned off from a start point of each of the N-th and the (N+1)-th frame periods to a point when a second predetermined time (T1) has elapsed, is then turned on from a second predetermined time (T1) to a point when a first predetermined time (T2) has elapsed, and is then turned off again from the first predetermined time (T2) to an end point of the frame period.