US 11,720,217 B2
Touch sensing circuit for enhancing performance of glove touch and method for operating same
Jun Tak Jeon, Daejeon (KR); and Kyung Hwan Kim, Daejeon (KR)
Assigned to LX SEMICON CO., LTD., Daejeon (KR)
Filed by LX Semicon Co., Ltd., Daejeon (KR)
Filed on Nov. 3, 2021, as Appl. No. 17/518,131.
Claims priority of application No. 10-2020-0170270 (KR), filed on Dec. 8, 2020.
Prior Publication US 2022/0179520 A1, Jun. 9, 2022
Int. Cl. G06F 3/044 (2006.01); G06F 3/041 (2006.01)
CPC G06F 3/0446 (2019.05) [G06F 3/0412 (2013.01); G06F 3/0416 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A touch sensing circuit comprising:
a touch power circuit configured to supply a driving signal to a readout circuit configured to transmit the driving signal to a touch electrode disposed on a panel; and
a touch control circuit configured to control an amplitude of the driving signal through a control interface for bidirectional communication, which is electrically connected with the touch power circuit, wherein
the touch power circuit comprises an amplifier for adjusting the amplitude of the driving signal,
when a touch sensing value, received from the readout circuit, is within a reference range for a time interval of a pre-configured frame, the touch control circuit is configured to change the amplitude of the driving signal by transmitting a control signal to change a feedback resistance of the amplifier to the touch power circuit through the control interface, and
the control signal transmitted through the control interface between the touch control circuit and the touch power circuit indicates to increase the amplitude of the driving signal.