Huawei Digital Power Technologies Co., Ltd.

Huawei Technologies Co., Limited

Qualcomm Incorporated

Shenzhen First Union Technology Co., Ltd.

Junjie Li

Kai Xin

Xinyu Yu

Yonghai Li

Zhongli Xu

Nan Zhang

Yanzhong Zhang

Yongjun Xu

Zhiwu Xu

Peng Dong

Bo Yu

Hongjun Zhao

Xuan Dai

Le Cong

Qingling Duan

Jiaguang Fu

The present disclosure relates to methods and apparatus for display processing. Aspects of the present disclosure can communicate an image to multiple display panels, where the multiple display panels include a first display panel and a second display panel. Further, aspects of the present disclosure can divide the image between the first display panel and the second display panel. Additionally, aspects of the present disclosure can scale at least one of a first portion of the image or a second portion of the image to at least one of the first display panel and the second display panel. Aspects of the present disclosure can also display at least one of the scaled first portion of the image or the scaled second portion of the image on at least one of the first display panel or the second display panel.

Methods and apparatus for partial display of frame buffers

A method and apparatus for suppressing cross current including: obtaining a common-mode current and a common-mode injection voltage of each inverter in an inverter parallel system; determining a virtual damping voltage of each inverter based on the common-mode current of each inverter and a preset common-mode damping factor, where if a direction in which a current flows out of the inverter is a positive direction, the preset common-mode damping factor is a negative value, or if a direction in which a current flows into the inverter is a positive direction, the preset common-mode damping factor is a positive value; superimposing the virtual damping voltage on the common-mode injection voltage of each inverter, to obtain a target common-mode voltage of each inverter; and controlling operation of each inverter based on the target common-mode voltage of each inverter and a differential mode voltage of each inverter.

Method and apparatus for suppressing cross current in inverter parallel system

A common-mode voltage injection control method and apparatus for an inverter. For the method and apparatus, a common-mode voltage for a DPWM mode is calculated based on three-phase port voltages and an output power command; a common-mode voltage for an MPC modulation mode is calculated based on the direct current bus voltage, the three-phase port voltages, and the output power command; a modulation proportion is determined based on a maximum phase voltage peak value of the three-phase port voltages, the direct current bus voltage, and a power factor of the output power command; and a common-mode injection voltage is generated based on the common-mode voltage for the DPWM mode, the modulation proportion, and the common-mode voltage for the MPC modulation mode.

Common-mode voltage injection control method and apparatus for inverter

The present disclosure provides an aerosol generation system, a measurement method, an atomization device, and a power supply device. The aerosol generation system comprises: a liquid storage cavity, a vaporization element, a battery cell providing a power to the vaporization element, an air flow sensor for measuring an air flow inhalation velocity, and a controller. The controller is configured to determine the consumption of a liquid matrix in a time period on the basis of the power applied to the vaporization element, the air flow velocity, a correlation coefficient between the amount of aerosol generated and the power applied to the vaporization element, and a correction constant between the amount of aerosol generated and the air flow velocity in the time period. The use of the aerosol generation system can accurately estimate, measure, and/or predict the amount of the aerosol or the liquid matrix material delivered to a user.

Aerosol generation system, measurement method, atomization device, and power supply device

A virtual machine responds to an operation of a user and generates a print request. The print request includes a to-be-printed file, virtual printer information, and a print parameter of the to-be-printed file. A virtual printer corresponds to a printer coupled to a terminal device. The virtual printer information indicates the printer corresponding to the virtual printer. After generating the print request, the virtual machine sends the print request to the terminal device to instruct the terminal device to print the to-be-printed file using the printer corresponding to the virtual printer information. After receiving the print request, the terminal device determines the printer based on the virtual printer information.

Method, apparatus, and system for printing file based on print request generated on virtual machine having virtual printer installed in it and send the print request to terminal device

A power supply system for controlling the power supply system includes a direct current voltage conversion apparatus, an inverter, and a diode. The direct current voltage conversion apparatus includes a controller and a direct current voltage conversion circuit. The controller is configured to: control the output voltage of the direct current voltage conversion circuit, so that the diode is in a conducted state; detect a voltage on the direct current bus; and determine, based on the voltage on the direct current bus, whether high voltage ride-through occurs in the power supply system. According to the power supply system and the method for controlling the power supply system provided in this application, high voltage ride-through can be quickly detected while fault isolation is implemented, thereby improving efficiency of detecting high voltage ride-through.

Power supply system and control method for power supply system

An islanding detection method and apparatus, and a computer-readable storage medium. The detection method includes: determining a harmonic amplitude growth rate and a frequency growth rate of alternating current electricity output by an alternating current port of a grid-tied inverter; determining an islanding disturbance coefficient corresponding to the harmonic amplitude growth rate, where the harmonic amplitude growth rate and the islanding disturbance coefficient are in a monotonically increasing relationship; determining an islanding injection amount based on the frequency growth rate and the islanding disturbance coefficient corresponding to the harmonic amplitude growth rate; controlling, based on the islanding injection amount, the grid-tied inverter to output a reactive power or a reactive current over the alternating current port; and performing islanding detection based on a frequency of the alternating current electricity output by the alternating current port. With this detection method, whether islanding occurs can be accurately detected. When islanding does not occur, disturbance to a power grid is reduced, and grid connection stability is improved. When islanding occurs, it can be quickly detected, and a detection time is relatively short.

Islanding detection method and apparatus, and computer-readable storage medium

A electronic device includes a USB Type-C interface, a switching circuit, a first signal path, and a second signal path. The USB Type-C interface is configured to connect to a USB Type-C device. The switching circuit is connected to the USB Type-C interface, the first signal path, and the second signal path. When the USB Type-C interface is connected to the USB Type-C device, the first signal path is connected to the USB Type-C interface through the switching circuit, and a level of a first pin of the USB Type-C interface is a first level. When the USB Type-C interface is disconnected from the USB Type-C device, the second signal path is connected to the USB Type-C interface through the switching circuit, and a level of the first pin is a second level. The first level is greater than the second level.

Growing community of inventors

Shanghai, China

Junjie Li