公开(公告)号：US20210174051A1

公开(公告)日：2021-06-10

申请号：US17182540

申请日：2021-02-23

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xilin WANG ,  Honghai ZHANG ,  Lilin XIA

IPC: G06K9/00

Abstract: This application provides an optical signal processing circuit and an electronic device, to improve a signal-to-noise ratio of an output signal of a fingerprint sensor, thereby improving a fingerprint recognition rate. The optical signal processing circuit includes a photosensitive device, an amplifier transistor T1, a switch transistor T2, a switch transistor T3, a readout circuit, a control circuit, and a voltage-adjustable power supply. When the optical signal processing circuit is in a compensation reset phase, the voltage of the gate of T1 exactly reaches a level at which the amplifier transistor T1 is turned on. Therefore, when an input voltage and a voltage increment are applied to the gate of T1, a gate-source voltage Vgs of T1 increases, and T1 amplifies an input voltage signal to generate an output signal.

公开(公告)号：US20200274373A1

公开(公告)日：2020-08-27

申请号：US15930883

申请日：2020-05-13

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xilin WANG

IPC: H02J7/00

Abstract: A charging apparatus is disclosed, the apparatus includes a charging circuit including a first voltage conversion circuit configured to convert an alternating current voltage into a first direct current voltage and a switch; a current leakage detection circuit including a second voltage conversion circuit configured to convert the first direct current voltage into a second direct current voltage that does not trigger charging of an electronic device, and the current leakage detection circuit is configured to: detect whether current leakage occurs between a voltage output end and the ground, and output a result at the voltage output end; an in-position detection circuit configured to detect whether the electronic device is in position; and a control circuit configured to: when no current leakage occurs and the electronic device is in position, close the switch, and when it is not in-position, open the switch to prevent the charging.

公开(公告)号：US20210134228A1

公开(公告)日：2021-05-06

申请号：US17146769

申请日：2021-01-12

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xilin WANG

IPC: G09G3/3266 ,  H04N5/225 ,  G09G3/3225 ,  G09G3/3216

Abstract: A display screen module is applied to an electronic device, and includes a first display array, one or more second display arrays, and a control circuit. The electronic device includes one or more groups of optical devices, and each group includes at least one optical device. The display arrays one-to-one correspond to the optical devices, and each second display array is located above a group of optical devices corresponding to the second display array. The control circuit is configured to control each second display array to display an image when none of optical devices in a group of optical devices corresponding to the second display array works. The control circuit is further configured to: when one or more optical devices in a group of target optical devices need to work, turn off some or all pixels of a target second display array corresponding to the group of target optical devices.

公开(公告)号：US20190394724A1

公开(公告)日：2019-12-26

申请号：US16562244

申请日：2019-09-05

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xilin WANG ,  Zhen YE ,  Tao YI ,  Xiangyang WANG ,  Yanguo HE ,  Zexu QIAN

IPC: H04W52/02

Abstract: A terminal management method and an apparatus, where the method includes that a terminal obtains a first light intensity at a first moment and a second light intensity at a second moment according to a first interval period. The second moment is later than the first moment. When a difference between the first light intensity and the second light intensity is greater than a first threshold, and the second light intensity is less than a second threshold, the terminal closes a target program.