Method of driving touch sensing display panel and display apparatus for performing the same

A method of driving a touch sensing display panel, the method comprising:

• providing image data to a data line of a touch sensing display panel during an active period of a frame;
• reading out a sensing signal sensed by a light sensing part of the touch sensing display panel on a read-out line during the active period of the frame;
• and
• removing coupling noise included in the sensing signal based on a coupling value preset corresponding to the image data, wherein the coupling value corresponds to measured optical and electrical coupling noise between the data line and the read-out line for a grayscale of the image data,
• wherein the coupling value is stored as a look-up table (LUT) according to grayscales of the image data.

A display apparatus comprising:

• a touch sensing display panel comprising a display substrate that includes a switching element connected to a data line extending in a column direction and a gate line extending in a row direction, and a touch sensing substrate that includes a light sensing part connected to a read-out line substantially parallel to the data line and a scan line substantially parallel to the gate line;
• a data driving part outputting image data to the touch sensing display panel during an active period of a frame;
• a read-out driving part reading out a sensing signal through the read-out line during a blanking period of the frame;
• a timing control part generating a timing control signal based on a master clock signal;
• a sensing control part generating a sensing control signal based on the timing control signal;
• and
• a scan driving part outputting an odd-numbered scan signal during the blanking period of an N-th frame (N is a natural number), and outputting an even-numbered scan signal during the blanking period of an (N+1)-th frame.

A display apparatus comprising:

• a touch sensing display panel comprising a display substrate that includes a switching element connected to a data line extending in a column direction and a gate line extending in a row direction, and a touch sensing substrate that includes a light sensing part connected to a read-out line substantially parallel to the data line and a scan line substantially parallel to the gate line;
• a data driving part outputting image data to the touch sensing display panel during an active period of a frame;
• a read-out driving part reading out a sensing signal through the read-out line during a blanking period of the frame;
• a sensing control part removing coupling noise included in the sensing signal based on a coupling value preset corresponding to the image data, wherein the coupling value corresponds to measured optical and electrical coupling noise between the data line and the read-out line for a grayscale of the image data;
• and
• a look-up table (LUT) storing the coupling value according to grayscales of the image data.