Huawei Technologies Co., Limited

Huawei Device Co., Ltd.

Shengcai Liu

Fengxin Wang

Shuqiang Gong

Lixiang Zheng

Wanbao Peng

An electronic device includes a movable assembly. An optical proximity sensor is disposed on the movable assembly. The movable assembly may be spaced from a fixed assembly on the electronic device, and the movable assembly can move on a plane that is disposed in parallel relative to the fixed assembly. A light intensity of light that is from the optical proximity sensor and that is reflected by the fixed assembly may reflect a position of the movable assembly relative to the fixed assembly. Whether the movable assembly moves to a specified target position may be determined based on the light intensity of the light that is reflected by the fixed assembly and that is detected by the optical proximity sensor.

Electronic device, and control method for movable assembly

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

Self-loop detection method and apparatus for charging device

A current-limiting protection circuit and an electronic device are provided. The current-limiting protection circuit includes a power supply chip and a current-limiting circuit that is electrically connected to the power supply chip. The current-limiting circuit is configured to detect a charging current, and output a feedback voltage to the power supply chip. The power supply chip is configured to when the feedback voltage is greater than a second reference voltage, reduce an output voltage until the charging current reaches a preset value, where the second reference voltage is a preset internal voltage of the power supply chip.

Current-limiting protection circuit and electronic device

A method for selecting an internal circuit according to a USB interface status includes: connecting a first pin of a USB interface of a terminal to a power supply through a pull-up resistor, where the first pin is a D&#x2212; or D+ pin; when detecting that an external USB device is inserted into the USB interface, detecting whether the level status of the first pin is high or low; if the level status is low, connecting the D&#x2212; and D+ pins to corresponding pins of a USB data communication module of the terminal and controlling charging of the terminal according to a first policy; if the level status is high, determining whether the level statuses of the D&#x2212; and D+ pins are consistent, and if consistent, controlling charging of the terminal according to a second policy; if inconsistent, controlling charging of the terminal according to a third policy.

Growing community of inventors

Xi'an, China

Shengcai Liu