Display device and position input system including the same

A position input system comprising:

• a display device configured to display an image;
• and
• a position input device configured to input position coordinate data to the display device,
• wherein the display device comprises:
• a display panel;
• a display unit comprising a plurality of emission areas, wherein the display unit is disposed on the display panel;
• a plurality of touch electrodes disposed between the plurality of emission areas, wherein the plurality of touch electrodes is configured to sense a touch input and;
• and
• a plurality of position code patterns disposed in position code pattern forming regions on the display panel, wherein each of the plurality of position code patterns is disposed to overlap a corresponding touch electrode of the plurality of touch electrodes in a corresponding position code pattern forming region,
• wherein a width in at least one horizontal direction of the touch electrodes formed in the position code pattern forming regions is greater than a width in at least one horizontal direction of the position code patterns overlapping a front surface thereof, and wherein the horizontal direction is parallel to an extending plane of the display panel, and
• wherein a formation width of a first touch sensor area formed in position code patterns is greater than a formation width of a second touch sensor area formed in peripheral regions.

A position input system comprising:

• a display device including a display unit and a touch unit;
• and
• a position input device,
• wherein the display unit comprises:
• a display panel comprising a plurality of pixel units;
• and
• a communication unit configured to communicate with the position input device, and
• wherein the touch unit comprises:
• a plurality of touch electrodes formed in a mesh structure, wherein the pixel units are disposed within openings of the mesh structure;
• and
• a plurality of position code patterns disposed within position code pattern forming regions, wherein each position code pattern of the plurality of position code patterns is disposed to overlap a corresponding touch electrode of the plurality of touch electrodes in a thickness direction, and wherein a width of each position code pattern is less than a width of the corresponding touch electrode,
• wherein the position input device comprises:
• a light emitter configured to emit infrared light onto the plurality of position code patterns;
• a light receiver configured to sense infrared light reflected from the position code patterns and generate an image signal;
• and
• a code processor configured to generate positional data based the image signal and output the positional data to the display unit,
• wherein the display unit updates a displayed image based on the positional data received from the position input device, and
• wherein a formation width of a first touch sensor area formed in position code patterns is greater than a formation width of a second touch sensor area formed in peripheral regions.