Electronic Device Power Negotiation for Battery Conservation
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Solution Overview
Problem
Conventional electronic devices often unintentionally supply power to external devices, which can deplete their own battery reserves unnecessarily.
Innovation Solution
An electronic device equipped with a controlling unit that negotiates power supply with external devices by initially offering a lower power option and only increasing power if the external device is determined to have the necessary functionality, thereby preventing unintended power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the electronic device performs power supply negotiation before determining external device functionality, then power leakage is prevented, but the negotiation process becomes more complex
Solution Approach 1:
The controlling unit performs a preliminary power supply negotiation with the external device before determining whether the external device has the predetermined functionality. This preliminary negotiation establishes initial power supply parameters that are later adjusted based on the external device's actual capabilities, preventing power leakage while maintaining a structured negotiation process.
Solution Approach 2:
The power supply negotiation process is divided into two distinct stages: a first power supply negotiation performed before functionality determination, and a second power supply negotiation performed after functionality determination. This segmentation allows the system to address power management and functionality verification as separate controllable steps.
2Power
If the electronic device offers higher power initially, then external device performance is improved, but battery consumption increases unnecessarily
Solution Approach 1:
The power supply capability offered to the external device is made dynamic rather than static. The controlling unit initially offers a first power supply capability, then adjusts to a second power supply capability after determining the external device's predetermined functionality. This dynamic adjustment ensures power matches actual needs, improving performance when required while conserving battery power when not needed.
3Measurement precision
If the electronic device determines external device functionality first, then power supply precision is improved, but the negotiation time increases
Solution Approach 1:
The power supply negotiation is structured as periodic action with two distinct phases: a first negotiation phase that occurs before functionality determination to establish baseline power parameters, and a second negotiation phase that occurs after functionality determination to refine power supply accuracy. This periodic structure balances timely power establishment with precise power matching.
Data Source
AI summary
The present invention provides an electronic device with added capabilities of preventing power supplying to an external device, and a controlling method for the electronic device. The electronic device includes: a connector capable of being connected to an external device and capable of allowing power supply to the external device; and a controlling unit configured to, in a stage before determining whether the external device has a predetermined functionality, notify the external device with information indicating first power, in a form of information indicating a power capable of being supplied to the external device. The controlling unit is also configured to, after determining that the external device has the predetermined functionality, notify the external device of information indicating second power, which is higher than the first power, in a form of information indicating a power capable of being supplied to the external device.