Lens Data Prioritization for Interchangeable Camera Readiness
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Solution Overview
Problem
In lens-interchangeable digital cameras, the time required to activate the camera or change lenses is prolonged due to the need for complete transmission of lens characteristic data, which can result in missed photo opportunities and memory limitations on the camera body unit.
Innovation Solution
A system where the camera body unit prioritizes acquiring and transmitting lens characteristic data based on parameter positions, starting with the closest data to the current lens position, allowing the camera to become ready for imaging sooner by using interpolation for image processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all lens characteristic data is transmitted when the interchangeable lens unit is mounted, then the camera body unit can have complete lens data for image processing, but the period of time from lens change until the camera is ready to take an image is prolonged
Solution Approach 1:
The patent segments lens characteristic data into multiple categories: basic data (transmitted immediately), data acquired upon user instruction, and data acquired in the background. This segmentation allows the camera to become operational quickly with essential data while progressively acquiring complete data set, resolving the contradiction between data completeness and readiness time.
Solution Approach 2:
The patent transmits basic lens characteristic data in advance before the user actually needs it for imaging. This preliminary transmission of essential data allows the camera to be ready for immediate use, while more comprehensive data acquisition continues in the background or upon user request.
2Reliability
If all lens characteristic data is transmitted and stored, then complete correction data is available for image processing, but the memory capacity on the camera body unit is exceeded
Solution Approach 1:
The patent extracts only the essential basic lens characteristic data that is transmitted and stored on the camera body unit's memory. Non-essential or redundant data is excluded from storage, instead being acquired temporarily when needed or stored on the lens unit itself, thus preventing memory overflow while maintaining functional completeness.
Solution Approach 2:
The patent uses the lens unit's memory as an intermediary storage for comprehensive lens characteristic data. The camera body unit maintains only essential data in its memory, while the lens unit stores the complete data set and transmits specific portions as needed, acting as a mediator that prevents camera memory overflow.
3Loss of time
If lens characteristic data is transmitted once and stored with lens identifier, then retransmission is omitted for the same lens, but the camera still cannot take images immediately after lens change
Solution Approach 1:
The patent applies different data transmission strategies to different types of lens data. Basic lens characteristic data is transmitted immediately in full to ensure immediate imaging capability, while other data is acquired progressively. This local differentiation in data handling ensures the critical path to imaging readiness is not blocked by comprehensive data acquisition.
Data Source
AI summary
A lens-interchangeable camera system includes: an interchangeable lens unit storing lens characteristic data corresponding to parameters of lenses in a discrete manner; and a camera body unit to which the lens characteristic data is transmitted from the interchangeable lens unit when the interchangeable lens unit is mounted. The camera body unit includes an acquisition data storage unit storing the transmitted lens characteristic data, a closest data acquisition processing unit, a close data acquisition processing unit, and an unacquired data acquisition processing unit. Processing is performed in the order from the closest data acquisition processing unit, the close data acquisition processing unit and the unacquired data acquisition processing unit.