Coordinated Image Stabilization Between Lens and Camera Body
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Solution Overview
Problem
Existing imaging apparatuses with interchangeable lenses and camera bodies face inefficiencies in utilizing image stabilization functions, as the detection and correction capabilities of the lens and body are not optimally coordinated, leading to suboptimal image stabilization performance.
Innovation Solution
The imaging apparatus includes a controller that selects between the lens and camera body for image stabilization based on their respective correction capabilities, with each performing stabilization within their correctable range and compensating with the other for excess blur, ensuring effective utilization of both systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If image stabilization is performed using only one system (lens or body), then the device complexity is reduced, but the correction capability is insufficient for large image blur
Solution Approach 1:
The patent combines the image stabilization functions of both the interchangeable lens (OIS) and camera body (BIS) into a coordinated dual-system approach. The lens-side stabilization corrects image blur within a first predetermined range by moving the correction lens, while the body-side stabilization handles remaining portion of image blur exceeding this range by moving the image sensor, achieving comprehensive correction capability through merging both systems
Solution Approach 2:
The patent segments the image blur correction task into two distinct ranges: a first predetermined range handled by the lens-side stabilization system and a remaining portion exceeding this range handled by the body-side stabilization system. This segmentation allows each system to operate within its optimal correction capability while collectively addressing the full spectrum of image blur
2Manufacturing precision
If the lens-side image stabilization corrects within a wider range, then the correction capability is improved, but the lens driver complexity and power consumption increase
Solution Approach 1:
The lens-side image stabilization performs partial correction by addressing only the first predetermined range of image blur, rather than attempting to correct the entire blur range. This partial action approach allows the lens driver to operate with reduced complexity and power consumption while the body-side stabilization complements it by handling the remaining portion of image blur
3Manufacturing precision
If both lens and body perform image stabilization simultaneously, then the correction capability is improved, but the coordination control complexity increases
Solution Approach 1:
The patent uses parameter-based coordination where the first controller and second controller exchange information about correction capability parameters and predetermined ranges. Based on these parameter comparisons, the controllers determine their respective correction ranges and coordinate their actions, reducing control complexity through parameter-driven decision-making rather than complex real-time coordination algorithms
Data Source
AI summary
An imaging apparatus includes an interchangeable lens, and a camera body. The interchangeable lens includes a correction lens, a lens driver, and a first controller. The camera body includes an image sensor, a sensor driver, and a second controller. The first or second controller selects one of the interchangeable lens and the camera body, in accordance with a level of correction capability to perform the image stabilization. Corresponding to the selected one, one driver of the lens driver and the sensor driver performs the image stabilization for the image blur within a predetermined range. The other driver corresponding to non-selected one performs the image stabilization for a remaining portion of the image blur exceeding the predetermined range.