Camera Diaphragm Control Switching for Faster Mode Transitions
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Solution Overview
Problem
Existing image capturing systems face challenges in efficiently switching the diaphragm controlling role between the lens apparatus and the image capturing apparatus during mode transitions, leading to delays in starting moving image recording.
Innovation Solution
An image capturing system with a lens apparatus and an image capturing apparatus that includes a diaphragm, a diaphragm driver, an aperture value setting member, and controllers to dynamically switch the diaphragm controlling role based on mode changes, allowing for high-speed aperture value adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the diaphragm controlling role is switched from the image capturing apparatus to the lens apparatus during mode transition, then the moving image recording can start promptly, but communication between the image capturing apparatus and lens apparatus is required which causes time delay
Solution Approach 1:
The system determines in advance which device (lens apparatus or image capturing apparatus) should control the diaphragm based on the target mode before the mode transition occurs. This preliminary determination allows the controlling device to be pre-selected, reducing communication delays during the actual transition.
Solution Approach 2:
The diaphragm controlling role is dynamically assigned based on the operating mode (still image or moving image). The system flexibly switches control authority between the lens apparatus and image capturing apparatus depending on whether still image mode or moving image mode is active, optimizing performance for each mode.
2Productivity
If the diaphragm is immediately driven in conjunction with aperture value change in moving image capturing mode, then the scene transition process can be recorded, but the communication protocol between devices adds complexity to the switching process
Solution Approach 1:
The diaphragm control function is segmented between two devices: the lens apparatus handles diaphragm control in moving image mode, while the image capturing apparatus handles it in still image mode. This segmentation allows each device to specialize in its designated mode, simplifying the overall control logic.
Solution Approach 2:
A role determination mechanism acts as an intermediary to decide which device should control the diaphragm based on the current mode. This intermediary layer manages the complexity of switching by providing a clear decision-making framework that determines control authority before execution.
Data Source
AI summary
An image capturing system including a lens apparatus including a diaphragm, a diaphragm driver, an aperture value setting member to set a first aperture value in accordance with a user operation, and a first controller to control the diaphragm driver, and an image capturing apparatus including a second controller to set a second aperture value based on a photometric value, switch a diaphragm controlling role to the first controller from the second controller after controlling the diaphragm driver to drive the diaphragm to the first aperture value via the first controller, when an image capturing mode is switched to a first mode in which the first controller controls the diaphragm driver so as to drive the diaphragm to the first aperture value from a second mode in which the second controller controls the diaphragm driver via the first controller to drive the diaphragm to the second aperture value.