Portable Electronic Equipment USB Power Feeding Control
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Solution Overview
Problem
Portable electronic devices, such as smartphones, face challenges in maintaining battery capacity when connected to external devices, as existing solutions either require additional software installations or indiscriminately interrupt power feeding, leading to user inconvenience and increased CPU/memory load.
Innovation Solution
Portable electronic equipment with a USB connector, secondary battery, and a control section that allows users to select power feeding or unfeeding through a menu, with automatic switching based on battery level or connection type, enabling flexible power management without increasing the load on external devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the portable headphone amplifying equipment shuts off feeding through the VBUS at all times when an external device is connected, then the external device's battery capacity is preserved, but user convenience deteriorates when connected to computers that should charge the internal battery
Solution Approach 1:
The feeding control is made dynamic rather than static. The system automatically adjusts the feeding state based on the type of external device connected, transitioning between feeding and unfeeding modes according to real-time connection status, thereby resolving the contradiction between preserving battery capacity and maintaining user convenience
Solution Approach 2:
The system implements feedback control by detecting the type of external device connected and automatically adjusting the feeding state accordingly. The control section receives information about the connected device and responds by appropriately enabling or disabling power feeding, eliminating the need for manual user intervention
2Ease of operation
If the smartphone controls feeding through software applications, then power management is achieved, but CPU and memory load increase
Solution Approach 1:
The portable headphone amplifying equipment acts as an intermediary device that handles the power control logic externally. Instead of burdening the smartphone's CPU with control tasks, the amplifying equipment's control section manages the feeding state based on simple connection detection, thereby reducing the load on the smartphone while maintaining automated power management
Solution Approach 2:
The system enables self-service operation where the portable headphone amplifying equipment automatically detects the connected device type and adjusts feeding state without requiring smartphone software intervention. This eliminates the need for complex control applications on the smartphone while achieving automated power management
Data Source
AI summary
Portable electronic equipment which prevents an unwanted decrease in capacity of an internal battery of an external device, such as a smartphone, by cutting off feeding as necessary when connected to the external device, such as the smartphone, through a USB.The portable electronic equipment has a USB connector for connection with the external device, a feeding switch for turning on or off feeding to the secondary battery through a VBUS line, and a CPU. The CPU subjects the feeding switch to ON-control at all times or OFF-control at all times, or displays a selection menu for selecting feeding or unfeeding when the external device is connected to the USB connector. When a user selects feeding, the feeding switch undergoes ON-control. When the user selects unfeeding, the feeding switch undergoes OFF-control.