Focus Guide Display Control for Multi-Device Video Cameras
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Solution Overview
Problem
Existing digital cameras and video cameras often display a focus guide on multiple output devices, but the effectiveness of the guide is compromised when the live view image is enlarged on one device, as it is not optimally displayed on the other devices, particularly the external monitor.
Innovation Solution
An electronic apparatus with multiple output units and a control unit that adjusts the display of a focus guide on each device based on the magnification of the live view image, ensuring the guide is effectively displayed on the device with enlarged view and not on the device with non-enlarged view, thereby optimizing focus adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a focus guide is displayed on multiple output devices simultaneously, then the guide is visible on all devices, but the guide effectiveness deteriorates on devices where the live view image is not enlarged
Solution Approach 1:
The patent applies local quality by making the focus guide display behavior device-specific rather than uniform across all devices. The control unit determines whether to display the focus guide on each output device based on whether the live view image is enlarged on that specific device. This allows the guide to be effectively displayed on the external monitor (where enlargement occurs) while avoiding ineffective display on the viewfinder (where no enlargement occurs), thereby optimizing guide effectiveness for each local context.
2Ease of operation
If a focus guide is displayed on the viewfinder, then the guide is visible to the photographer, but the guide becomes less effective when the external monitor displays an enlarged view
Solution Approach 1:
The patent implements dynamics by making the focus guide display status changeable and adaptive rather than static. The control unit dynamically adjusts the guide display behavior based on real-time conditions - specifically, whether the live view image is being enlarged on a particular output device. This dynamic adaptation ensures the guide is displayed on the viewfinder when appropriate (for photographer visibility) and suppressed when the external monitor shows an enlarged view (where the guide would be less effective), thereby optimizing focus adjustment ease while preventing guide effectiveness loss.
3Loss of information
If the focus guide is optimized for the external monitor with enlarged display, then the guide effectiveness improves on that device, but the guide may not be visible or effective on the viewfinder
Solution Approach 1:
The patent applies segmentation by dividing the focus guide display control into separate, independent control paths for each output device. Rather than using a single unified display rule, the control unit evaluates each device (viewfinder and external monitor) separately, determining guide visibility based on the enlargement status of the live view image on that specific device. This segmented approach allows the system to optimize guide effectiveness for the external monitor while simultaneously maintaining appropriate guide display on the viewfinder, thereby resolving the contradiction between guide effectiveness and multi-device adaptability.
Data Source
AI summary
An apparatus, if a live view image is not displayed in an enlarged manner on first and second display units, outputs, to the first and second display units, an image acquired by superimposing a guide indicating a degree of focus of a focus detection region, on the live view image, and if a live view image is displayed in an enlarged manner on the first display unit, outputs, to the first display unit, an image acquired by enlarging a partial region in the live view image that includes the focus detection region and superimposing the guide on the enlarged image, and outputs, to the second display unit, the live view image on which the guide is not superimposed.