US 12,111,997 B2
Electronic device to detect input based on a capacitance change and input of an input device
Chul Kim, Yongin-si (KR); and Yun-Ho Kim, Yongin-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
Filed on Jan. 30, 2023, as Appl. No. 18/103,360.
Claims priority of application No. 10-2022-0047102 (KR), filed on Apr. 15, 2022.
Prior Publication US 2023/0333692 A1, Oct. 19, 2023
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01); G06F 3/046 (2006.01)
CPC G06F 3/04182 (2019.05) [G06F 3/0446 (2019.05); G06F 3/046 (2013.01); G06F 2203/04106 (2013.01)] 20 Claims
OG exemplary drawing
 
15. An electronic device comprising:
a display layer;
a sensor layer on the display layer, the sensor layer being configured to operate in a first touch mode to sense a first input signal based on a capacitance change, and a second touch mode to sense a second input signal of an input device configured to discharge a magnetic field; and
a driving circuit electrically connected to the sensor layer to control an operation of the sensor layer,
wherein the driving circuit comprises:
an analog front end configured to convert an analog signal of the second input signal into a digital signal; and
a sync controller connected to the analog front end, the sync controller comprising:
a sync data providing circuit configured to provide a sync signal that is inverted to a position signal of the second input signal;
an XOR gate connected to the analog front end and the sync data providing circuit, the XOR gate configured to perform a XOR operation based on the position signal and the sync signal; and
a sync determining circuit configured to determine a synchronization state of the second input signal, based on a result of the XOR operation.