Method of removing jagging of stereoscopic image and stereoscopic image display device using the same

A stereoscopic image display device, comprising:

• a display panel comprising scan lines and data lines crossing over the scan lines;
• an image processor comprising:
• a jagging removing unit configured to remove jagging of a three-dimensional (3D) image;
• and
• a 3D formatter configured to:
• convert jagging-removed image data according to a 3D format;
• and
• output the converted 3D image data;
• a data driver configured to:
• convert the converted 3D image data into data voltage;
• and
• supply the data voltage to the data lines;
• and
• a gate driver configured to sequentially supply gate pulses synchronized with the data voltage to the gate lines,
• wherein the jagging removing unit comprises:
• an edge detector configured to detect left edges and right edges by analyzing left-eye image data and right-eye image data, and
• a first data converter configured to:
• replace the left-eye image data on a kth line with the left-eye image data on a (k−1)th line in response to a first absolute value of a difference between a number of the left edges on the (k−1)th line and a number of the left edges on the kth line being equal to or more than a edge number threshold value, and
• replace the right-eye image data on the kth line with the right-eye image data on the (k−1)th line in response to a second absolute value of a difference between a number of the right-eye edge data on the (k−1)th line and a number of the right-eye edge data on the kth line being equal to or more than the edge number threshold value,
• wherein k is a natural number equal to or more than 2 and equal to or less than n, and
• wherein n is a number of lines of the display panel.