US 12,216,853 B2
Converting integrator, touch driving circuit, and touch display device
Hongju Lee, Seoul (KR); Hyunwoo Kim, Seoul (KR); and Jaekyu Park, Paju-si (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Nov. 14, 2023, as Appl. No. 18/389,501.
Claims priority of application No. 10-2022-0189373 (KR), filed on Dec. 29, 2022.
Prior Publication US 2024/0220045 A1, Jul. 4, 2024
Int. Cl. G06F 3/044 (2006.01); G06F 3/041 (2006.01)
CPC G06F 3/0416 (2013.01) 19 Claims
OG exemplary drawing
 
1. A touch display device, comprising:
a plurality of touch electrodes disposed on or in a display panel; and
a touch driving circuit configured to drive the plurality of touch electrodes by outputting a touch driving signal having a first level period and a second level period,
wherein the touch driving circuit includes:
a current regulator configured to:
receive an input current from at least one of the plurality of touch electrodes during at least a partial period of the first level period and at least a partial period of the second level period of the touch driving signal, and
scale down the input current to a first current and output the first current; and
a converting integrator configured to:
output a sensing voltage based on the first current or a second current adjusted from the first current, and
wherein the converting integrator includes:
a first integration block configured to integrate a voltage according to the first current or the second current during at least a partial period of the first level period of the touch driving signal;
a second integration block configured to integrate a voltage according to the first current or the second current during at least a partial period of the second level period of the touch driving signal; and
a gain buffer configured to output the sensing voltage based on the voltage integrated by the first integration block and the voltage integrated by the second integration block.