Camera Recording Unit Reducing Interchangeable Lens Data Transfer Time
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Solution Overview
Problem
In camera systems with interchangeable lenses or accessories, existing technologies require full data transfer from lenses or accessories each time they are attached, leading to increased communication time and potential delays in camera startup.
Innovation Solution
A camera system with a recording unit that registers specific information of attached lenses or accessories, allowing only identification information to be exchanged when data communication is necessary, reducing overall communication time by utilizing a storage unit, judgment unit, and control unit to manage data transfer efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all specific information is read out from the interchangeable lens or accessory each time it is attached, then the camera main body can obtain complete data for operation control, but the communication time increases and startup is delayed
Solution Approach 1:
The patent extracts only the necessary identification information from the full specific information set stored in the interchangeable lens or accessory. The camera main body reads out only identification information (such as lens type, focal length, aperture values) rather than all available data, thereby reducing communication time while obtaining sufficient data for operation control.
Solution Approach 2:
The patent implements preliminary action by pre-storing specific information in the interchangeable lens or accessory before attachment. The identification information is prepared in advance in the lens's memory or storage unit, allowing the camera main body to quickly retrieve only the necessary data without needing to process or request all information during the attachment moment.
2Loss of time
If identification information only is exchanged when the lens is attached, then the communication time is reduced, but the camera may lack complete data for proper operation control
Solution Approach 1:
The patent uses copying by storing specific information in advance in the interchangeable lens or accessory's internal memory. The camera main body copies only the necessary identification information from this pre-stored data during attachment, rather than transferring all data. This copying approach ensures that the essential information needed for operation control is obtained quickly and accurately.
3Loss of information
If all data from the interchangeable lens is read out to memory means in the camera main body, then complete information is available for control operations, but the data transfer time increases significantly
Solution Approach 1:
The patent applies extraction by selectively reading out only identification information from the interchangeable lens's stored data rather than transferring all data. The camera main body extracts the essential parameters needed for operation control (such as focal length, aperture, lens type) while leaving the remaining data in the lens's internal storage, thereby significantly reducing data transfer time and improving startup speed.
Solution Approach 2:
The patent implements partial action by performing only the necessary data transfer of identification information rather than complete data transfer. This partial approach provides sufficient information for operation control without the overhead of transferring excessive data, optimizing the balance between information completeness and startup speed.
Data Source
AI summary
In a main body of a camera, a recording unit is disposed which is capable of recording specific information of a photographing lens or an accessory. When the specific information of the presently attached photographing lens or accessory has been already registered in the recording unit, the main body of the camera does not acquire all the specific information from the attached photographing lens or accessory by data communication. In a case where the specific information of the attached photographing lens or accessory has been registered in the recording unit, the only identification information of the interchangeable lens or accessory can be enough, even if the data communication is necessary. In consequence, a communication time with respect to the interchangeable lenses or various types of accessories can be reduced as a whole.