US 11,657,766 B2
Sensing circuit and source driver including the same
Taiming Piao, Daejeon (KR); Young Bok Kim, Daejeon (KR); Won Kim, Daejeon (KR); and Byeon Cheol Lee, Daejeon (KR)
Assigned to LX SEMICON CO., LTD., Daejeon (KR)
Filed by LX Semicon Co., Ltd., Daejeon (KR)
Filed on Nov. 22, 2021, as Appl. No. 17/456,114.
Claims priority of application No. 10-2020-0160264 (KR), filed on Nov. 25, 2020.
Prior Publication US 2022/0165219 A1, May 26, 2022
Int. Cl. G09G 3/3275 (2016.01); G09G 3/3233 (2016.01); H03F 3/45 (2006.01)
CPC G09G 3/3275 (2013.01) [G09G 3/3233 (2013.01); H03F 3/45269 (2013.01); H03F 3/45273 (2013.01); G09G 2300/0842 (2013.01); G09G 2310/0291 (2013.01); G09G 2320/0295 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A sensing circuit comprising:
an amplifier circuit configured to receive an input current from a display panel; and
wherein the amplifier circuit converts the input current into an output current, and outputs the output current to have an amount of current smaller than the input current,
a sampling circuit configured to output a sampling voltage by sampling the output current,
and wherein the sampling circuit comprises:
a first switch configured to transfer the output current;
a sampling capacitor configured to sample the output current transferred through the first switch;
a second switch configured to output the sampling voltage sampled through the sampling capacitor; and
a third switch configured to initialize the sampling capacitor to a second reference voltage.