Contact device, plasma display including the same, and driving method thereof

A plasma display comprising:

• a display panel;
• a driver configured to display a detection pattern in the display panel;
• and
• a controller configured to:
• i) divide one screen image, displayed in the display panel, into a plurality of areas, wherein each of the areas corresponds to at least one of a plurality of discharge cells in the display panel, and wherein the plurality of areas form the detection pattern, ii) receive a detection image which has been previously detected by a contact device and corresponds to at least one of the plurality of areas, iii) compare the received detection image with the detection pattern and iv) determine a position of the at least one area detected by the contact device based on the comparison.

A method of driving a plasma display, comprising:

• storing a detection pattern, which is formed by dividing one screen image, displayed in the plasma display, into a plurality of areas which corresponds to a plurality of discharge cells of the plasma display, respectively;
• displaying the detection pattern in the plasma display;
• receiving a detection image which has been previously detected or captured and corresponds to one of the plurality of areas;
• comparing the received detection image with the detection pattern;
• and
• determining a position of the detected or captured area based on the comparison.