Accessory Power Management via Identifier Resistance Detection
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Solution Overview
Problem
Existing electronic device systems lack comprehensive adaptive power management capabilities for accessories, particularly in determining whether an accessory is connected to a power supply, leading to inefficient power distribution and operation.
Innovation Solution
The system employs identifier resistances to determine if an accessory is connected to a power supply, applying power from either the electronic device or the power supply device based on identified resistances, using switches and a processor module to manage power distribution effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the electronic device applies power to the accessory device without determining power supply connection status, then the accessory device can operate continuously, but the electronic device consumes excessive power and battery life is reduced
Solution Approach 1:
The patent introduces identifier resistors as intermediary elements that mediate between the power supply connection status and the electronic device's power management system. These resistors provide a reliable electrical signal that indicates whether an external power supply is connected, enabling accurate power management decisions without requiring complex detection circuits.
Solution Approach 2:
The patent replaces complex mechanical or sensor-based power supply detection mechanisms with an electrical resistance-based detection system. By using identifier resistors with specific resistance values connected to the accessory device, the system electrically determines power supply connection status through simple resistance measurement, improving reliability while reducing power consumption.
2Measurement precision
If the electronic device uses complex detection methods to determine power supply connection status, then detection accuracy improves, but device complexity increases
Solution Approach 1:
The patent extracts the power supply detection function from the main electronic device circuitry and implements it through separate identifier resistors located in the accessory device. This separation allows the detection mechanism to be simple and standardized, while the accessory device maintains independence and flexibility.
Solution Approach 2:
The identifier resistors serve multiple functions: they indicate power supply connection status, provide circuit completion for detection, and can be integrated into various accessory devices using different resistance values to indicate different power supply scenarios. This universal approach simplifies the overall system while maintaining high detection accuracy.
3Productivity
If the electronic device continuously monitors power supply status, then power management responsiveness improves, but energy consumption increases
Solution Approach 1:
The patent implements periodic monitoring of the identifier resistor status rather than continuous monitoring. The electronic device checks the power supply connection status at regular intervals by measuring the resistance value, which maintains responsive power management while significantly reducing power consumption compared to continuous monitoring approaches.
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
This approach enables efficient power management by ensuring accessories operate using the appropriate power source, optimizing power usage and extending battery life in electronic devices.
Implementation Method 1
applying a current to the accessory device and in response to the applied current, at least one of first and second identifier resistances are identified in the accessory device
Data Source
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AI summary
A method is employed by an electronic device for managing power used by an associated accessory device attached to the electronic device. The method includes applying a current to the accessory device and in response to the applied current, at least one of first and second identifier resistances are identified in the accessory device. The method determines whether the accessory device is connected to a power supply in response to the at least one of identified first and second identifier resistances and applies power to the accessory device in response to a determination the accessory device is not connected to the power supply.