Active pen sensing device, a sensing driving method, and a display device

A sensing driving method in an active pen sensing device comprising a plurality of division blocks divided into a matrix along a first direction and a second direction intersecting the first direction, each of which comprises a plurality of sensing cells, a plurality of first sensing lines connected to the plurality of sensing cells of each of the plurality of division blocks along the first direction, a plurality of second sensing lines connected to the plurality of sensing cells of each of the plurality of division blocks along the second direction, and a sensing driving device connected to the plurality of first sensing lines and the plurality of second sensing lines to drive the plurality of division blocks, comprising:

• detecting the presence or absence of the active pen by activating the plurality of first sensing lines;
• when the active pen is detected, detecting the coordinates of the active pen by activating the plurality of first sensing lines and the plurality of second sensing lines;
• and
• when the coordinates of the active pen are detected, performing local sensing by activating the first sensing lines and the second sensing lines connected to a specific division block where the active pen is located and first neighboring division blocks.

A display device, comprising:

• a panel;
• and
• an active pen sensing device configured to detect a touch or proximity of the active pen to the panel,
• wherein the active pen sensing device comprises:
• a plurality of division blocks divided into a matrix along a first direction and a second direction intersecting the first direction, each of which comprises a plurality of sensing cells;
• a plurality of first sensing lines connected to the plurality of sensing cells of each of the plurality of division blocks along the first direction;
• a plurality of second sensing lines connected to the plurality of sensing cells of each of the plurality of division blocks along the second direction;
• and
• a sensing driving device connected to the plurality of first sensing lines and the plurality of second sensing lines to drive the plurality of division blocks,
• wherein the sensing driving device is configured to:
• detect the presence or absence of the active pen by activating the plurality of first sensing lines,
• when the active pen is detected, detect the coordinates of the active pen by activating the plurality of first sensing lines and the plurality of second sensing lines, and
• when the coordinates of the active pen are detected, perform local sensing by activating the first sensing lines and the second sensing lines connected to a specific division block where the active pen is located and first neighboring division blocks.