US 12,216,860 B2
Display device and a touch sensing system including the same
Sang Hyun Lim, Yongin-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD, Yongin-si (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed on Jan. 6, 2023, as Appl. No. 18/093,926.
Claims priority of application No. 10-2022-0072565 (KR), filed on Jun. 15, 2022.
Prior Publication US 2023/0409142 A1, Dec. 21, 2023
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/04166 (2019.05) [G06F 3/0446 (2019.05)] 18 Claims
OG exemplary drawing
 
1. A display device, comprising:
a display panel in which a plurality of pixels are arranged in an image display area;
a touch sensing unit disposed on a surface of the display panel, wherein the touch sensing unit is configured to sense a touch of an electronic pen;
a display driving circuit configured to drive the pixels; and
a touch sensing circuit configured to generate touch coordinate data by detecting a touch position of the electronic pen,
wherein the touch sensing circuit is configured to drive pen touch electrodes so that the electronic pen is electromagnetically charged, and to recognize a touch and a touch position of the electronic pen by detecting a variation of a pen touch sensing signal of the pen touch electrodes,
wherein the touch sensing unit comprises:
first pen touch electrodes arranged in parallel with each other in a first direction in a pen touch sensing area; and
second pen touch electrodes arranged in parallel with each other in a second direction crossing the first direction in the pen touch sensing area,
wherein the touch sensing circuit is configured to supply pen touch driving signals during at least one frame period to the first pen touch electrodes in order from a first side of the pen touch sensing area in the first direction to a second side of the pen touch sensing area in the first direction, and
to supply the pen touch driving signals during at least one frame period to the second pen touch electrodes in order from a third side of the pen touch sensing area in the second direction to a fourth side of the pen touch sensing area in the second direction.