US 12,254,162 B2
Touch sensing unit and display device including the same
Won Sang Park, Yongin-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-Si (KR)
Filed on Feb. 25, 2022, as Appl. No. 17/681,056.
Claims priority of application No. 10-2021-0070204 (KR), filed on May 31, 2021.
Prior Publication US 2022/0382398 A1, Dec. 1, 2022
Int. Cl. G06F 3/046 (2006.01); G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/046 (2013.01) [G06F 3/0412 (2013.01); G06F 3/0446 (2019.05); G06F 2203/04107 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A display device comprising:
a display panel including a plurality of light emitting regions;
a touch sensing unit disposed on the display panel and including transmission electrodes and reception electrodes; and
a touch driving circuit configured to transmit a transmission signal to each of the transmission electrodes to transmit an electromagnetic wave from the each of the transmission electrodes, and receive a reception signal from each of the reception electrodes receiving the electromagnetic wave reflected by an object,
wherein the electromagnetic wave has a frequency of 10 GHz to 100 GHz,
wherein one transmission electrode among the transmission electrodes, and a plurality of reception electrodes disposed adjacent to the one transmission electrode is defined as one sensor unit,
wherein an area of the one transmission electrode is substantially equal to an area of each of one reception electrode among the plurality of reception electrodes which surround the one transmission electrode,
wherein the touch driving circuit is configured to select one sensor unit among a plurality of sensor units which has a highest sensitivity of the reception signal, and calculate a position of a selected sensor unit as a touch coordinate, and
wherein the display panel further comprises a transmission line commonly connected to a plurality of transmission electrodes disposed adjacent to each other in a same direction, and the transmission line further comprises a winding pattern on a branch line disposed in a touch sensor region and elongated from a branch point of the transmission line to each of the plurality of transmission electrodes.