OIS Lens Tracking Moving Objects via Speed and Direction Calculation
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Solution Overview
Problem
Current mobile phone cameras struggle to capture clear images of moving objects due to limitations in photography techniques and image stabilization, resulting in blurry images.
Innovation Solution
A lens control method and apparatus utilizing an optical image stabilization (OIS) motor to track moving objects by calculating the object's speed and direction, allowing the lens to move accordingly to maintain focus and alignment, thereby capturing a clear and background-stretched image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional photographing techniques are used to capture moving objects, then the camera can maintain a stable position, but the captured image becomes blurry due to camera jitter and inability to track the moving object
Solution Approach 1:
The patent applies the Dynamics principle by enabling the lens to move dynamically rather than remain fixed. The lens is driven by an optical image stabilization motor to track the moving object's position in real-time, allowing the camera to adapt its position to follow the subject while maintaining image stability. This resolves the contradiction by making the camera system dynamic rather than static, enabling it to both track moving objects and maintain reliable image capture.
Solution Approach 2:
The patent implements Feedback by using image recognition technology to detect the position and movement of the target object, then using this information to control the lens movement. The system continuously monitors the object's position and adjusts the lens position accordingly, creating a closed-loop control system that maintains image clarity while compensating for camera jitter through active tracking.
2Measurement precision
If the camera remains stationary to maintain stability, then the camera structure is simple, but the captured image of moving objects becomes blurry
Solution Approach 1:
The patent transforms the static camera structure into a dynamic system by adding a movable lens component driven by an optical image stabilization motor. This allows the lens to independently move and track the target object while the camera body remains stationary, achieving clear images of moving objects without requiring complex full-camera movement mechanisms.
Solution Approach 2:
The patent applies segmentation by separating the image stabilization function from the entire camera body and isolating it to the lens component. Only the lens moves to track the object, while the rest of the camera remains stable. This divided approach achieves the necessary tracking capability with minimal added complexity, as only a small lens assembly needs to be made movable rather than the entire camera system.
3Measurement precision
If the lens is made movable to track the moving object, then clear images can be captured, but the device complexity increases due to additional motor and control mechanisms
Solution Approach 1:
The patent applies the universality principle by designing the optical image stabilization motor to serve multiple functions: it performs both traditional optical image stabilization (compensating for hand shake) and active tracking of moving objects. This multi-functional design eliminates the need for separate mechanisms, reducing overall device complexity while achieving the goal of capturing clear images of moving objects.
Solution Approach 2:
The patent merges the image stabilization function and the object tracking function into a single integrated system. The lens movement mechanism that originally served only to stabilize the image during hand-held shooting is now combined with object tracking capability through image recognition control, consolidating multiple functions into one unified system rather than adding separate independent mechanisms.
Data Source
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AI summary
This application provides a lens control method and apparatus and a terminal. The method is applied to a camera module with an OIS motor. The module includes a lens, an OIS motor, an OIS motor driver module, and an imaging sensor. The method includes: obtaining a first speed and a first direction of a to-be-photographed object in a moving process, an object distance between the to-be-photographed object and the lens, and an image distance between the lens and the imaging sensor; calculating a second speed and a second direction based on the first speed, the first direction, the object distance, and the image distance; and sending a control signal to the OIS motor driver module, so that the OIS motor driver module drives the OIS motor to control the lens to move at the second speed and in the second direction. In this application, the second speed and the second direction required by the lens for movement are determined by using the first speed and the first direction used for movement of the to-be-photographed object, the object distance, and the image distance, and then the lens is driven by the OIS motor to move, to track the to-be-photographed object, so that a clear image of the to-be-photographed object is photographed.