Accessory Device Power Management for Camera Systems
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Solution Overview
Problem
Existing battery grips for image apparatuses face challenges in efficiently managing power supply and connector pin limitations, leading to potential differences in state between the image apparatus and accessory device, which can cause erroneous operations.
Innovation Solution
The proposed solution involves an accessory device with a control CPU that uses a connection interface to supply power to the image apparatus, featuring a switching circuit to select power from multiple batteries and a communication interface like SPI for control signals, reducing the need for immediate connector pins and ensuring proper power management and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a battery grip is attached to the image apparatus to expand operationality and extend image capturing time, then power supply capacity and operational duration are improved, but connector pin limitations and timing synchronization issues arise
Solution Approach 1:
The accessory device is designed to perform multiple functions: it can supply power to the image apparatus via the connection interface, and simultaneously have its power supplied from the image apparatus for charging the attached battery. This dual power flow capability allows a single connector interface to handle both power delivery and power reception, reducing the need for separate dedicated connectors for each function.
Solution Approach 2:
The accessory device autonomously manages its own power state by detecting when it is connected to the image apparatus and automatically entering a power reception state for charging. The device independently monitors its battery level and controls the charging process without requiring external intervention, thereby simplifying the overall system control architecture.
2Adaptability or versatility
If the accessory device receives power from the image apparatus for charging, then battery recharging capability is improved, but timing differences in connector connection may cause erroneous operations
Solution Approach 1:
The accessory device proactively detects the connection state with the image apparatus and transitions to a power reception state in advance, before actual power transfer begins. This preliminary state preparation ensures that the device is ready to receive power immediately upon connection, eliminating timing mismatches and preventing erroneous operations that could arise from delayed state transitions.
Solution Approach 2:
The accessory device continuously monitors its own power state and the connection status with the image apparatus, using this feedback information to dynamically adjust its power management behavior. By detecting when power is actually being received and adjusting its operational state accordingly, the device ensures synchronized operation between power supply and power reception functions.
Data Source
AI summary
An electronic apparatus connectable to an external electronic apparatus and storing at least one power supply for operating the external electronic apparatus includes a connection interface that is connected to the external electronic apparatus, and at least one processor configured to control the electronic apparatus. Power of the at least one power supply is supplied to the external electronic apparatus via the connection interface. The at least one processor controls the external electronic apparatus by using power received from the external electronic apparatus via the connection interface.