Image Capturing Apparatus Focus Guide Stability During Aperture Transitions
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Solution Overview
Problem
Existing image capturing apparatuses face instability in displaying the focus guide image when the aperture value changes, leading to inaccurate indicator angles and unstable focus guide displays during transitions.
Innovation Solution
An image capturing apparatus with an image sensor, processors, and memory that periodically acquires and normalizes the aperture state to generate and display indicators for focus states, selecting between dynamic and static indicators based on aperture changes to maintain display stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the aperture value changes during exposure, then the depth of field changes, but the focus guide display becomes unstable and inaccurate
Solution Approach 1:
The patent applies dynamics by making the focus guide display adaptive to changing aperture conditions. The system dynamically adjusts the focus guide based on whether the aperture is changing or fixed, transitioning between different display modes (first display form during aperture transition, second display form when aperture is stable) to maintain reliability while preserving aperture adjustability
Solution Approach 2:
The patent changes the display parameters of the focus guide based on aperture state. When the aperture value changes, the system switches to a first display form with adjusted indicator characteristics, and when the aperture is stable, it uses a second display form, thereby adapting the display parameters to match the current optical conditions and maintain accuracy
2Adaptability or versatility
If the aperture value changes during exposure, then the light gathering ability changes, but the indicator angle becomes inaccurate
Solution Approach 1:
The system dynamically adjusts the indicator display based on aperture transition state. During aperture changes, the first display form is used with modified indicator characteristics that account for the changing light gathering ability, ensuring measurement precision is maintained despite exposure adjustments
Solution Approach 2:
The system incorporates feedback by monitoring the aperture value changes and using this information to adjust the focus guide display accordingly. The control unit detects aperture transitions and switches between display forms based on this feedback, ensuring the indicator accuracy reflects the current exposure conditions
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution improves the stability and accuracy of focus guide displays by adjusting indicators according to aperture changes, ensuring consistent and reliable focus guidance during exposure and image processing.
Implementation Method 1
an image sensor that periodically outputs an image obtained by converting light entering through a diaphragm into an image signal
Data Source
AI summary
In an image capturing apparatus, an image sensor outputs an image converted from light entering through a diaphragm, an acquisition unit acquires an aperture state of the diaphragm, a generator generates a first indicator indicating a focus state of the image, a controller superimposes the image and an indicator indicating a focus state of the image, and displays a resultant image on a display device, a memory stores the indicator displayed on the display device as a second indicator, and a selector selects the first indicator in a case where the aperture state at least at a time of exposure of the image or of generating the first indicator by the generator is changing, and selects the second indicator in a case where the aperture state at these times is not changing. The controller displays the selected indicator.