Camera Control Circuit Background Initialization
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Solution Overview
Problem
Conventional digital cameras with large recording capacity memory cards take a long time to become operational after power is turned on, causing users to wait excessively before they can take photos.
Innovation Solution
A digital camera with a control circuit that initiates and manages the recording medium initialization process independently of user input, suspending and resuming photography processes based on the completion of initialization, allowing for immediate camera readiness even with high-capacity memory cards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the initialization processing of the recording medium is performed completely before allowing photographing operations, then the reliability of data recording is improved, but the time required for the camera to become operational increases
Solution Approach 1:
The system performs preliminary actions (initialization processing) in the background before they are strictly needed. The initialization processing is started when power is turned on and continues in the background while the system prepares for photographing operations, allowing the camera to become operational before the initialization is fully complete.
Solution Approach 2:
The system dynamically adjusts its operational state based on the completion status of initialization processing. The control circuit monitors whether initialization is complete and enables photographing operations accordingly, transitioning from a static wait-state to a dynamic conditional operation mode that optimizes both reliability and responsiveness.
2Reliability
If the camera waits for initialization processing to complete before responding to shutter button presses, then data integrity is ensured, but the responsiveness to user input deteriorates
Solution Approach 1:
The initialization processing is initiated as a preliminary action when power is turned on, running in the background independently of user photographing requests. This allows the system to prepare the recording medium in advance without requiring the user to wait idle, improving responsiveness while maintaining data integrity through proper completion checking.
Solution Approach 2:
The control circuit acts as an intermediary that manages the relationship between user input (shutter button presses) and the initialization processing status. It receives user input, checks whether initialization is complete, and either processes the photographing request immediately or queues it appropriately, mediating between the need for data integrity and user responsiveness.
3Loss of time
If the initialization processing is performed in the background during photographing operations, then the camera becomes operational faster, but the complexity of process management increases
Solution Approach 1:
The control circuit is segmented into distinct functional units: one that manages initialization processing and another that handles photographing operations. This segmentation allows independent management of each process, enabling the initialization to run in the background while photographing operations proceed separately, reducing the perceived complexity through modular organization.
Solution Approach 2:
The system employs dynamic process management where the control circuit continuously monitors the state of initialization processing and adjusts its handling of photographing requests accordingly. This dynamic approach allows flexible coordination of multiple processes without requiring complex static scheduling, managing complexity through adaptive state-based control.
Data Source
AI summary
A digital camera of the present invention comprises a control circuit executing an initialization processing of a recording medium mounted thereon and a series of photographing processings. The control circuit starts the initialization processing of the recording medium when a power of a camera body is turned on, and thereafter, determines presence/absence of an image recording operation regardless of whether or not the initialization processing has been completed. The control circuit starts the series of photographing processings when it is determined that the image recording operation has been performed, then, when either the exposure processing or one or more steps of signal processing is completed, suspends the series of photographing processings to determine whether or not the initialization processing of the recording medium has been completed, and resumes the series of photographing processings when it is determined that the initialization processing of the recording medium has been completed.