	US 12,236,883 B2
	Current detection device
Xinshe Yin, Beijing (CN); Guangliang Shang, Beijing (CN); Hualing Yang, Beijing (CN); Xinbin Han, Beijing (CN); and Jianchao Zhu, Beijing (CN)
Assigned to BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 18/566,530
Filed by BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Jun. 25, 2021, PCT No. PCT/CN2021/102538 § 371(c)(1), (2) Date Dec. 1, 2023, PCT Pub. No. WO2022/267055, PCT Pub. Date Dec. 29, 2022.
Prior Publication US 2024/0257756 A1, Aug. 1, 2024
Int. Cl. G09G 3/3241 (2016.01)

CPC G09G 3/3241 (2013.01) [G09G 2310/027 (2013.01); G09G 2310/0297 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/043 (2013.01)]

17 Claims

1. A current detection device, comprising a plurality of detection circuitries each coupled to a sense line in a display panel, wherein the detection circuitries comprise a current detection circuitry configured to detect a current on the sense line coupled to the current detection circuitry;

wherein the current detection circuitry comprises an integration sub-circuitry, a reference voltage write-in circuitry and a resetting circuitry;

one end of the reference voltage write-in circuitry is coupled to at least one sense line, another end of the reference voltage write-in circuitry is coupled to a reference voltage end, and the reference voltage write-in circuitry is configured to write a reference voltage into the at least one sense line; and

one end of the resetting circuitry is coupled to the at least one sense line, another end of the resetting circuitry is coupled to an initial voltage end and the integration sub-circuitry. and the resetting circuitry is configured to write an initial voltage into the at least one sense line;

wherein the reference voltage write-in circuitry comprises a reference level control switch, one end of the reference level control switch is coupled to the at least one sense line, and another end of the reference level control switch is coupled to the reference voltage end;

wherein the resetting circuitry comprises a follower amplifier and a resetting control switch;

one end of the follower amplifier is coupled to the resetting control switch, another end of the follower amplifier is coupled to the initial voltage end, and the follower amplifier is configured to reset a voltage on the sense line to the initial voltage when the resetting control switch is in an on state; and

one end of the resetting control switch is coupled to at least one sense line, and another end of the resetting control switch is coupled to the follower amplifier;

wherein the reference voltage end writes a reference voltage into a source electrode of a driving transistor through the reference level control switch, the sense line and a sensing control switch in a pixel circuitry.