Dynamic Lens Focus Calibration for Camera Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Camera systems in devices face challenges due to factors like aging components, temperature changes, and pressure variations, leading to inaccurate focusing and user frustration.
Innovation Solution
The camera system dynamically updates lens focus calibration values by collecting data points on object distances and actuator settings, generating a linear curve to determine updated calibration values, which replace stored values if they differ by a threshold amount, ensuring accurate focusing in various conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fixed calibration values are used in camera systems, then manufacturing simplicity is maintained, but focusing accuracy deteriorates due to component aging, temperature changes, and pressure variations
Solution Approach 1:
The patent implements dynamic calibration values that automatically update based on environmental conditions (temperature, pressure) and component aging. The system transitions from static factory-set calibration to dynamic calibration that adapts over time, collecting data points during operation and regenerating calibration curves to maintain focusing accuracy despite changing conditions
Solution Approach 2:
The camera system performs self-calibration by collecting its own data points during normal operation and automatically regenerating calibration curves without requiring external intervention. The system monitors its own performance degradation and autonomously updates calibration values to compensate for aging and environmental changes
Solution Approach 3:
The system implements feedback loops where data points collected during camera operation are used to evaluate current calibration accuracy. The calibration curve generation process continuously receives feedback from measured data points and adjusts calibration values accordingly, creating a closed-loop system that maintains accuracy over time
2Adaptability or versatility
If dynamic calibration updates are implemented, then focusing accuracy under varying conditions is improved, but data processing requirements and system complexity increase
Solution Approach 1:
The system performs preliminary data collection during normal camera operation, accumulating data points that will be used for future calibration updates. By preparing calibration data in advance during routine use, the system reduces the complexity of real-time processing when calibration updates are needed
Solution Approach 2:
The patent changes the calibration parameters dynamically based on environmental conditions (temperature, pressure) and usage patterns. Instead of fixed parameters, the system adjusts calibration values as parameters change, enabling adaptation to different environments while managing complexity through structured parameter transformation
Data Source
AI summary
A camera system lens or image sensor is moved to change the distance between the image sensor the lens in order for the image sensor to capture an-focus of an object. The camera system includes one or more calibration values indicating distances between the lens and the image sensor for different distances to objects, such as a macro calibration value and an infinity calibration value. These one or more calibration values are used by the camera system when manually focusing the camera system (e.g., a user manually sets the camera system to a macro setting or an infinity setting) or when automatically focusing the camera system on an object. These one or more calibration values are dynamically updated during use of the camera system, allowing the camera system to adapt to various factors such as changes in environment, pressure applied to the camera system, and so forth.