Dynamic Focus Detection for Imaging Apparatus
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Solution Overview
Problem
Conventional digital cameras lack user-friendly operation for automatic focusing during video and still image recording due to overlapping functions between the AF button and release switch, leading to cumbersome adjustments and reduced operability.
Innovation Solution
An imaging apparatus with a dedicated AF button that includes a dynamic-image focus detector and a still-image focus detector, allowing for separate focus detection operations controlled by a second switch, which varies based on whether video or still-image recording is in progress, enhancing usability and operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a dedicated AF button is added to control focus operations, then focus control functionality is improved, but device complexity increases
Solution Approach 1:
The AF button is designed to perform multiple functions depending on the recording mode. During video recording, it controls continuous focus adjustment, while during still image recording, it controls focus detection and locking. This multi-functionality approach allows the single button to replace what would traditionally require separate controls, improving ease of operation without proportionally increasing device complexity
Solution Approach 2:
The functionality of the AF button dynamically changes based on the recording mode. The control unit automatically adjusts the button's function according to whether video or still image recording is active, allowing the same physical button to provide context-appropriate focus control without requiring additional buttons or complex manual configuration
2Device complexity
If AF button functions overlap with release switch, then device complexity is reduced, but ease of operation deteriorates
Solution Approach 1:
The focus control functionality is segmented between the AF button and the release switch based on recording mode. The AF button is dedicated to focus operations, while the release switch handles shutter control. This functional segmentation eliminates the confusion caused by overlapping functions, allowing each button to have a clear, predictable role that improves operability
Solution Approach 2:
The control unit acts as an intermediary that manages the interaction between the AF button and release switch. It automatically determines which button should control focus based on the recording mode, mediating between the user's button presses and the focus adjustment mechanism to provide intuitive, mode-appropriate control without requiring the user to manually configure button functions
3Ease of operation
If focus detection operation is varied based on recording mode, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The focus detection operation dynamically adapts to the recording mode. During video recording, the system performs continuous focus detection and adjustment, while during still image recording, it performs discrete focus detection and locking. This dynamic behavior is automatically managed by the control unit, which switches between different focus control algorithms based on the active recording mode, providing mode-appropriate operability without requiring manual user configuration
Solution Approach 2:
The system continuously monitors the recording mode status and uses this feedback to automatically adjust the focus detection operation. The control unit receives feedback about whether video or still image recording is active and accordingly modifies the focus control behavior, creating a closed-loop system that automatically optimizes operability for the current recording mode without adding complex manual controls
Data Source
AI summary
An imaging apparatus is provided that includes an image sensor that receives light from an object through an imaging lens, a lens driver that moves the imaging lens, and an automatic focus detector that determines an in-focus lens position based on imaging data obtained from the image sensor, the automatic focus detector being capable of performing a focus detection operation with a second switch that is different from a release switch in that it includes a dynamic-image focus detector and a still-image focus detector, and the dynamic-image focus detector further including a focus detection operation selector that varies a focus detection operation controlled by the second switch in accordance with whether a video is being recorded.