公开(公告)号：US20180054067A1

公开(公告)日：2018-02-22

申请号：US15557332

申请日：2015-03-10

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wanbao Peng ,  Fengxin Wang ,  Lixiang Zheng ,  Shengcai Liu

IPC: H02J7/00

CPC classification number: H02J7/007 ,  H02J7/00

Abstract: A self-loop detection method for a charging device includes switching a positive signal cable Do and a negative signal cable Do from a connected state to a disconnected state; and detecting whether a positive signal cable Di and a negative signal cable Di are switched from a connected state to a disconnected state; and if yes, determining that a self-loop exists in the charging device.

公开(公告)号：US10742057B2

公开(公告)日：2020-08-11

申请号：US15557332

申请日：2015-03-10

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wanbao Peng ,  Fengxin Wang ,  Lixiang Zheng ,  Shengcai Liu

IPC: H02J7/04 ,  H02J7/16 ,  H02J7/00

Abstract: A self-loop detection method for a charging device includes switching a positive signal cable Do and a negative signal cable Do from a connected state to a disconnected state; and detecting whether a positive signal cable Di and a negative signal cable Di are switched from a connected state to a disconnected state; and if yes, determining that a self-loop exists in the charging device.

公开(公告)号：US12197674B2

公开(公告)日：2025-01-14

申请号：US18247120

申请日：2021-09-14

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhengyuan Hu ,  Fengxin Wang ,  Jiacong Zhang

IPC: G06F3/041 ,  G06F3/042 ,  G06F3/044

Abstract: A touch detection drive circuit in an electronic device inputs a touch excitation signal to a touch electrode, and receives a detection signal of the touch electrode. An isolation power supply circuit receives the touch excitation signal and a primary power supply voltage; based on the touch excitation signal in a non-touch detection phase, short-circuits a first reference ground and a second reference ground, stores the primary power supply voltage, and transmits the primary power supply voltage to the touch detection drive circuit; and in a touch detection phase, disconnects the first reference ground from the second reference ground and discharges to the touch detection drive circuit.

公开(公告)号：US11977700B2

公开(公告)日：2024-05-07

申请号：US18247419

申请日：2021-09-14

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhengyuan Hu ,  Fengxin Wang ,  Jian Shen ,  Nanxue Gong

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0416 ,  G06F3/0446 ,  G06F2203/04108

Abstract: A touch detection drive circuit in an electronic device inputs a touch excitation signal to a touch electrode, and receives a detection signal of the touch electrode. An isolation power supply circuit: receives the touch excitation signal and a primary power supply voltage; based on the touch excitation signal in a non-touch detection phase, short-circuits a first reference ground and a second reference ground, stores the primary power supply voltage, and transmits the primary power supply voltage to the touch detection drive circuit; and in a touch detection phase, disconnects the first reference ground from the second reference ground and discharges to the touch detection drive circuit.

公开(公告)号：US20240019957A1

公开(公告)日：2024-01-18

申请号：US18247419

申请日：2021-09-14

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhengyuan Hu ,  Fengxin Wang ,  Jian Shen ,  Nanxue Gong

IPC: G06F3/041

CPC classification number: G06F3/0416 ,  G06F2203/04108 ,  G06F3/0446

Abstract: A touch detection drive circuit in an electronic device inputs a touch excitation signal to a touch electrode, and receives a detection signal of the touch electrode. An isolation power supply circuit: receives the touch excitation signal and a primary power supply voltage; based on the touch excitation signal in a non-touch detection phase, short-circuits a first reference ground and a second reference ground, stores the primary power supply voltage, and transmits the primary power supply voltage to the touch detection drive circuit; and in a touch detection phase, disconnects the first reference ground from the second reference ground and discharges to the touch detection drive circuit.

公开(公告)号：US20230367421A1

公开(公告)日：2023-11-16

申请号：US18247120

申请日：2021-09-14

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhengyuan Hu ,  Fengxin Wang ,  Jiacong Zhang

IPC: G06F3/041 ,  G06F3/042 ,  G06F3/044

CPC classification number: G06F3/04166 ,  G06F3/0421 ,  G06F3/0448

Abstract: A touch detection drive circuit in an electronic device inputs a touch excitation signal to a touch electrode, and receives a detection signal of the touch electrode. An isolation power supply circuit receives the touch excitation signal and a primary power supply voltage; based on the touch excitation signal in a non-touch detection phase, short-circuits a first reference ground and a second reference ground, stores the primary power supply voltage, and transmits the primary power supply voltage to the touch detection drive circuit; and in a touch detection phase, disconnects the first reference ground from the second reference ground and discharges to the touch detection drive circuit.