US 11,810,489 B2
Sensing circuit for detecting characteristics of display panel and display driver integrated circuit including the same
Hajun Lee, Seoul (KR); Jeongah Ahn, Hwaseong-si (KR); and Youngsub Jin, Seoul (KR)
Assigned to Samsung Electronics Co., Ltd.
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Nov. 26, 2021, as Appl. No. 17/535,874.
Claims priority of application No. 10-2021-0050649 (KR), filed on Apr. 19, 2021.
Prior Publication US 2022/0335866 A1, Oct. 20, 2022
Int. Cl. G09G 3/00 (2006.01); G09G 3/3291 (2016.01)
CPC G09G 3/006 (2013.01) [G09G 3/3291 (2013.01); G09G 2320/045 (2013.01); G09G 2330/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A sensing circuit connected to a plurality of pixels in a display panel through a plurality of sensing channels, the sensing circuit comprising:
a plurality of initialization switches configured to apply an initialization voltage to the plurality of sensing channels based on an initialization control signal;
a plurality of shield switches configured to apply a fixed-value shield voltage different from the initialization voltage to the plurality of sensing channels based on a plurality of shield control signals;
a plurality of signal selection switches configured to sequentially output a plurality of sensing currents received from the plurality of sensing channels based on a plurality of sensing control signals; and
a signal current integrator configured to sequentially convert the plurality of sensing currents into a plurality of sensing voltages, wherein
concurrent with the signal current integrator converting a target sensing current, among the plurality of sensing currents, received from a target sensing channel, among the plurality of sensing channels, into a target sensing voltage among the plurality of sensing voltages, the fixed-value shield voltage is applied to at least one adjacent shield sensing channel that is adjacent to the target sensing channel.