US 11,721,293 B2
Source driver integrated circuit and display driving device
Seung Hwan Ji, Daejeon (KR); Ho Sung Hong, Daejeon (KR); Ye Ji Lee, Daejeon (KR); and Jung Bae Yun, Daejeon (KR)
Assigned to LX SEMICON CO., LTD., Daejeon (KR)
Filed by LX Semicon Co., Ltd., Daejeon (KR)
Filed on Dec. 7, 2021, as Appl. No. 17/544,864.
Claims priority of application No. 10-2020-0176088 (KR), filed on Dec. 16, 2020.
Prior Publication US 2022/0189417 A1, Jun. 16, 2022
Int. Cl. G09G 3/3291 (2016.01)
CPC G09G 3/3291 (2013.01) [G09G 2300/0408 (2013.01); G09G 2300/0842 (2013.01); G09G 2310/08 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A source driver integrated circuit (IC) comprising:
an internal ground GND;
a first switch circuit including a first input terminal electrically connected to the internal ground GND and a first output terminal electrically connected to a sensing line of a display panel, configured to transfer, when turned on in a sensing mode, a sensing reference voltage supplied from the internal ground GND to the sensing line, and configured to be turned off in a display mode;
a driving reference voltage input pad to which a driving reference voltage supplied from an external voltage source is input;
a second switch circuit including a second input terminal electrically connected to the driving reference voltage input pad and a second output terminal electrically connected to the sensing line, configured to transfer, when turned on in the display mode, the driving reference voltage to the sensing line, and configured to be turned off in the sensing mode; and
a sensing channel circuit electrically connected to the internal ground in the sensing mode and configured to receive an electrical characteristic of a pixel included in the display panel through the sensing line.