Dual Anti-Jitter Camera Module for Long-Focus Precision
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Solution Overview
Problem
Camera modules with long-focus optical paths face challenges in achieving precise jitter compensation due to limited movement precision of optical folding elements, resulting in low precision of final jitter compensation on imaging light beams.
Innovation Solution
The camera module incorporates a dual anti-jitter compensation system, with a front-end and back-end anti-jitter component, utilizing high-frame-rate image shake sensors and MEMS actuators to detect and correct jitter, enhancing precision through cooperative first and second jitter compensation processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a long-focus optical path is used to achieve large zoom magnification, then the zoom capability is improved, but the jitter of the imaging light beam increases
Solution Approach 1:
The anti-jitter function is segmented into two independent components: a front-end anti-jitter component that performs first jitter compensation on the imaging light beam, and a back-end anti-jitter component that performs second jitter compensation. This segmentation allows each component to specialize in specific compensation tasks, with the front-end handling initial stabilization and the back-end providing final precision correction, thereby resolving the jitter issue while maintaining long-focus zoom capability
Solution Approach 2:
The front-end anti-jitter component acts as an intermediary between the optical folding element and the back-end anti-jitter component. It performs preliminary jitter compensation on the imaging light beam before it reaches the image sensor, reducing the burden on the back-end component and enabling the system to handle large zoom magnification while maintaining stability
2Volume of moving object
If an optical folding element is used to implement long-focus optical path in limited space, then the compactness is improved, but the movement precision is limited
Solution Approach 1:
The jitter compensation function is divided between the optical folding element (front-end) and a separate image sensor actuating structure (back-end). The optical folding element provides coarse stabilization with larger movement range suitable for compact design, while the image sensor actuating structure provides fine precision adjustment, thereby achieving both compactness and high movement precision
Solution Approach 2:
The system adds a new dimension of compensation by introducing the back-end anti-jitter component that operates independently from the optical folding element's movement. This secondary compensation dimension allows the system to achieve high precision without increasing the physical size of the optical folding mechanism itself
3Device complexity
If only a single anti-jitter component is used, then the device complexity is reduced, but the jitter compensation precision is insufficient
Solution Approach 1:
The anti-jitter function is segmented into two specialized components: the front-end anti-jitter component connected to the optical folding element for first jitter compensation, and the back-end anti-jitter component connected to the image sensor for second jitter compensation. This segmentation enables each component to optimize for its specific function, achieving high overall precision while keeping individual component designs relatively simple
Solution Approach 2:
The dual anti-jitter component system enables dynamic coordination between first and second jitter compensation. The front-end component handles initial stabilization dynamically, and the back-end component provides dynamic fine-tuning, allowing the system to adapt to varying jitter conditions and achieve high precision without requiring either component to be overly complex
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
This dual compensation system significantly improves the precision of jitter compensation, expanding the compensation range and ensuring accurate stabilization of imaging light beams, even in long-focus optical paths.
Implementation Method 1
The first jitter detection structure has a light sensing region, and the first jitter detection structure is disposed around the image capture region of the image sensor; the first jitter detection structure is configured to: capture the received imaging light beam in the light sensing region, and detect whether the imaging light beam captured in the light sensing region jitters
Implementation Method 2
the back-end anti-jitter component includes an image sensor actuating structure and a first jitter detection structure, where the image sensor actuating structure is fixedly connected to the image sensor; the image sensor actuating structure is configured to: after the first jitter detection structure detects that the imaging light beam captured in the light sensing region jitters, drive the image sensor to move, to perform the second jitter compensation on the imaging light beam
Implementation Method 3
The optical folding element is configured to: fold an optical path of a received imaging light beam and transfer the optical path to the lens group
Data Source
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AI summary
This application relates to the field of electronic technologies, and relates to a camera module, an anti-jitter component, and a terminal. The camera module includes an optical folding element, a lens group, and an image sensor that are sequentially arranged along an imaging light beam transmission direction, where the optical folding element is configured to: fold an optical path of a received imaging light beam and transfer the optical path to the lens group; the lens group is configured to transmit the received imaging light beam to the image sensor; and the image sensor has an image capture region, and is configured to capture the received imaging light beam in the image capture region. The camera module further includes a front-end anti-jitter component and a back-end anti-jitter component, where the front-end anti-jitter component is connected to at least one of the optical folding element and the lens group, the back-end anti-jitter component is connected to the image sensor, the front-end anti-jitter component is configured to perform first jitter compensation on the imaging light beam, and the back-end anti-jitter component is configured to perform second jitter compensation on the imaging light beam. This application can resolve a problem of relatively low jitter compensation precision of an imaging light beam.