Charge Transfer Control for Portable Media Player Battery Life
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Solution Overview
Problem
The disparity in power consumption between portable media players and media delivery accessories, such as speakers, limits the operational duration when connected, as the accessory requires more power to drive large speakers than the player is designed for.
Innovation Solution
A method and system for managing power by controlling the transfer of charge between internal power supplies in a consumer electronic product, allowing it to operate in a self-powered DC mode by determining the necessary charge transfer based on the current operating state and charge status of both the media player and the media delivery accessory.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the media player is connected to a media delivery accessory with large speakers, then the audio output quality is improved, but the operational duration is reduced due to higher power consumption
Solution Approach 1:
The system performs preliminary charge transfer from the media player to the media delivery accessory before playback begins. The player determines the required charge amount based on the accessory's power consumption characteristics and transfers sufficient charge in advance to sustain operation for a predetermined period, ensuring uninterrupted playback without requiring continuous power supply from the player.
Solution Approach 2:
The system changes the power distribution parameters by enabling bidirectional charge transfer between the player and accessory. The player can both receive power from the accessory during playback and transfer charge to it in advance. This dynamic parameter adjustment allows the system to adapt to varying power consumption rates and extend operational duration while maintaining audio quality.
2Duration of action of moving object
If the media player transfers charge to the media delivery accessory, then the operational duration in DC mode is extended, but the player's internal power supply charge status changes
Solution Approach 1:
The system continuously monitors the charge status of both the media player and media delivery accessory during operation. Based on this feedback, the player dynamically adjusts the charge transfer rate and amount to ensure that sufficient charge remains in the player's internal power supply while still extending the overall operational duration. This feedback mechanism prevents complete depletion of the player's battery while maximizing playback time.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the consumer electronic product to operate for a predetermined period in DC mode by optimizing charge transfer, ensuring uninterrupted playback and extending the operational time when connected to a media delivery accessory.
Implementation Method 1
the media player controls a transfer of an amount of charge between at least two of the plurality of internal power supplies
Data Source
AI summary
A consumer electronic product that includes a media player arranged to process a selected one of a plurality of digital media files stored therein and a media delivery accessory unit detachedly connected to the media player arranged to broadcast the processed digital media file. When the consumer electronic product is in a DC mode, the consumer electronic product controls a transfer of an amount of charge between the media delivery accessory and the media player. In one embodiment, the amount of charge is sufficient to for the consumer electronic product to operate for a predetermined amount of time. In another embodiment, the amount of charge is sufficient for to maximize an amount of time that the media player and media delivery accessory can operate.