Audio Device Power Supply System for Seamless External Charging
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Solution Overview
Problem
Smartphone-based head-mounted displays face power constraints due to limited battery capacity, leading to potential shutdowns during energy-intensive activities like VR gaming or 3D movie watching, requiring users to remove the phone for charging, which reduces user satisfaction.
Innovation Solution
A power system that includes a mobile terminal and an audio device with control units, energy management units, power switches, and ports, allowing seamless switching between battery power and an external power supply to prevent shutdowns, ensuring continuous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the battery capacity is increased to extend operation duration, then the duration of action is improved, but the weight and volume of the mobile terminal increase
Solution Approach 1:
The patent combines the power supply system of the mobile terminal and the audio device into a unified system. The mobile terminal's battery can power both devices when connected via the first port, effectively merging two separate power consumption systems into one shared power source, thereby extending total operation duration without adding battery weight to the audio device
Solution Approach 2:
The mobile terminal's battery and power management system are designed to serve multiple functions: powering the mobile terminal itself, and simultaneously powering the connected audio device through the first port. This multi-functionality allows one battery to support multiple devices, extending operational duration without proportionally increasing weight
2Reliability
If the battery capacity is increased to prevent shutdowns during energy-intensive activities, then the reliability is improved, but the weight and volume increase
Solution Approach 1:
The patent introduces an external power supply as an intermediary energy source. When connected through the third port, the external power supply supplements or replaces battery power, ensuring continuous operation during energy-intensive activities without requiring the battery to be oversized. The external power supply acts as a mediator that bridges the gap between limited battery capacity and high energy demands
3Reliability
If the user removes the mobile phone from the head-mounted display to charge it separately, then the battery can be recharged, but the user experience deteriorates due to service interruption
Solution Approach 1:
The patent enables continuous power supply to both the mobile terminal and audio device through dual power paths. The external power supply can simultaneously charge the mobile terminal battery while powering the audio device through different ports, eliminating the need to interrupt service for charging. The power management system maintains continuous operation by seamlessly switching between battery and external power sources
Solution Approach 2:
The system performs preliminary charging actions by allowing the external power supply to charge the mobile terminal battery in advance while the audio device is still being used. The power management unit monitors battery levels and proactively manages power distribution, ensuring the battery is recharged before complete depletion occurs, thus preventing service interruption
Data Source
AI summary
A power system for audio device comprises a mobile terminal and an audio device, wherein the mobile terminal including a first control unit, a battery, a first energy management unit configured to power the mobile terminal, a first power switch and a first port; the audio device including a second control unit, a second energy management unit configured to power the audio device, a second power switch, a second port matching with the first port and a third port; energy provided by an external power supply transmitting to the second power switch, the second port, the first port and the first energy management unit via the third port; the third port being connected to the second energy management unit and configured to transmit energy to the second energy management unit. The present invention ensures that if low battery level is being detected, the external power supply connected could supply energy, so as to avoid the interruption due to low power level and ensure the operation of the audio device, thereby improving the user experience and the product competitiveness and facilitating the promotion.