A method and system for supplying power to USB devices

Abstract

The present invention relates to the field of terminal technologies, and discloses a method and a system for supplying power to a USB device. The system includes a USB device and a host, where the USB device is connected to the host through a USB cable, and the host may supply power to the USB device through the USB cable. The power supplying method includes: when a power supplying state of the host changes, automatically switching a power supplying manner for the USB device; when an electric quantity of the USB device is low, performing comprehensive analysis on power supplying state information of the USB device and the host according to a rule set by a monitoring program, selecting a proper power supplying manner and implementing dynamic switching of the power supplying manner. According to the present invention, the power supplying manner may be dynamically switched in a case that a connection is not broken, which ensures electricity supply to the USB device in a case that endurance of the host itself is ensured.

Description

technical field [0001] The present invention relates to the technical field of terminals, in particular to a method and system for supplying power to a USB device. Background technique [0002] With the continuous development of science and technology and the continuous improvement of integrated circuit technology, the current terminal electronic equipment is getting smaller and smaller and more powerful. At the same time, the rapid development of mobile Internet services, mobile communication services and mobile games, etc. As a result, people increasingly use small terminal electronic devices to access the network or perform entertainment, thus having higher requirements on the battery life of terminal products. [0003] USB (Universal Serial Bus, Universal Serial Bus) is a serial bus standard connecting computer systems and external devices. It is also a technical specification for input and output interfaces, and is widely used in information communication products such ...

AI Technical Summary

Problems solved by technology

[0004] Now more and more people are using USB cables to supply power to terminal electronic devices with USB interfaces through computers. At present, there are two ways for computers to supply power to USB devices. One is to supply power to USB devices fixedly by computers. This method cannot guarantee the power supply of the computer itself for devices with high endurance requirements, such as tablet computers and portable computers without external power supply; , the computer cannot supply power to the device, causing the USB device to run out of power and cannot continue to be used

[0005] To sum up, in the prior art, there is no method that can realize the power supply to the USB device while ensuring the battery life of the computer itself.

Images