Camera Focus Lens Display Control for Adjustable Range
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Solution Overview
Problem
Camera devices with automatic focusing functions lack intuitive methods to inform photographers of the current focus mode and adjustable focus range, leading to potential mismatch between focus settings and subject distance, which can result in irrational focusing operations.
Innovation Solution
Incorporating a display system that indicates the focus adjustable range, including the close and remote ends of the focus range, and automatically adjusts the focus mode based on detected subject distance changes, using contrast detection for precise focusing and displaying this information to the user through different modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a display device is added to show focus mode information, then user convenience is improved, but device complexity increases
Solution Approach 1:
The patent combines the focus mode display function with the existing display device already present in the camera system. Rather than adding a separate dedicated display device, the invention utilizes the camera's existing display capabilities to show focus mode information, thereby improving user convenience while minimizing the increase in device complexity.
Solution Approach 2:
The display device is made multi-functional by using it to display both general camera information and specific focus mode information. This allows the same hardware component to serve multiple purposes, avoiding the need for additional dedicated display devices and reducing overall system complexity.
2Reliability
If automatic focus mode switching is implemented, then focusing effectiveness is improved, but loss of information about current mode increases
Solution Approach 1:
The patent implements a feedback mechanism by displaying focus mode information to the user through the display device. This feedback loop allows the user to understand what focus mode is currently active, compensating for the information loss that would otherwise occur during automatic mode switching. The display provides continuous information about the system's state.
Solution Approach 2:
The display device shows focus mode information in advance of any automatic switching action. By presenting the current focus mode to the user before switching occurs, the system prepares the user for the upcoming change and maintains informational continuity, reducing the perceived loss of information during automatic transitions.
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
Enhances user convenience by providing clear and intuitive focus mode adjustments, preventing mismatched focus settings and improving the effectiveness of the automatic focusing function by displaying the focus adjustable range and automatically changing modes as needed.
Implementation Method 1
contrast detecting means for detecting a contrast value of a subject image taken by an image capture means
Data Source
AI summary
A camera device is provided which has an optical system including a focus lens, focus control for focusing the optical system on a subject by driving the focus lens, and display control for causing a display to display numerals indicating a first distance of a close end and a second distance of a remote end of a subject distance range in which the focus control can focus the optical system.