US 12,260,818 B2
Sensing circuit, display device including sensing circuit, and method of driving sensing circuit
Hayong Jung, Hwaseong-si (KR); Wook Lee, Hwaseong-si (KR); Sung Hwan Kim, Yongin-si (KR); and Jaehoon Shin, Hwaseong-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do (KR)
Filed by Samsung Display Co., LTD., Yongin-si (KR)
Filed on May 10, 2023, as Appl. No. 18/195,684.
Claims priority of application No. 10-2022-0093071 (KR), filed on Jul. 27, 2022.
Prior Publication US 2024/0038168 A1, Feb. 1, 2024
Int. Cl. G09G 3/32 (2016.01); G09G 3/3233 (2016.01)
CPC G09G 3/3233 (2013.01) [G09G 2300/0819 (2013.01); G09G 2300/0842 (2013.01); G09G 2310/08 (2013.01); G09G 2320/029 (2013.01); G09G 2330/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A sensing circuit of a display device, comprising:
a first line selection switch which connects a first sensing line to a sensing channel in a first sub-sensing period in a first sensing period;
a first noise selection switch which connects the first sensing line to a reference channel in a second sub-sensing period in a second sensing period;
a second line selection switch which connects a second sensing line to the sensing channel in the second sub-sensing period; and
a second noise selection switch which connects the second sensing line to the reference channel in the first sub-sensing period,
wherein, in a first sampling period in the first sub-sensing period, the sensing channel samples a first sensing voltage and a noise of the first sensing line, and the reference channel samples a noise of the second sensing line,
wherein, in a second sampling period in the second sub-sensing period, the sensing channel samples a second sensing voltage and a noise of the second sensing line, and the reference channel samples a noise of the first sensing line, and
wherein the first sensing line and the second sensing line are connected to different pixels, each including a first switching transistor connected to a data line and a second switching transistor connected to a corresponding one of the first sensing line and the second sensing line.