Image Sensor Displacement OIS for Heavy Lens Camera Modules
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Solution Overview
Problem
Existing optical image stabilization (OIS) technologies face challenges in ensuring effective image stabilization due to the increasing weight and number of lenses, leading to a thrust bottleneck that limits the image stabilization effect, especially in scenarios requiring long focal lengths and macro photography.
Innovation Solution
A camera module design that utilizes the displacement of an image sensor instead of the lens for stabilization, incorporating a first and second magnetic driver group to drive suspended beam assemblies, which are integrated with a flexible assembly on a compact circuit board, allowing for reduced weight and size, and includes double-sided electrical signal wiring for miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lens is driven to perform displacement compensation for image stabilization, then image stabilization is achieved, but the weight of the component to be driven increases, requiring higher thrust from the image stabilization motor
Solution Approach 1:
Instead of moving the lens for image stabilization, this patent moves the image sensor in the opposite direction to achieve the same stabilization effect. The image sensor is mounted on a movable assembly that can be driven by the image stabilization motor, allowing the sensor to compensate for camera shake while the lens remains stationary, thereby reducing the weight of the moving component.
Solution Approach 2:
The patent replaces the traditional mechanical lens-driven stabilization system with a sensor-driven system. By mounting the image sensor on a movable platform with magnetic drivers, the system achieves image stabilization through sensor displacement rather than lens movement, reducing the mechanical burden on the stabilization motor.
2Adaptability or versatility
If the quantity and weight of lenses are increased to meet long focal length and macro requirements, then photographing capability is improved, but the thrust of the image stabilization driving apparatus reaches a bottleneck
Solution Approach 1:
The patent inverts the traditional approach by stabilizing the image sensor rather than the lens. This allows the use of heavier lens assemblies for long focal length and macro photography without proportionally increasing the thrust requirements of the stabilization motor, since the sensor (not the entire lens assembly) needs to be moved for stabilization.
Solution Approach 2:
The patent segments the camera module into fixed and movable parts. The heavy lens assembly remains fixed, while only the image sensor and its supporting movable assembly are subject to stabilization forces. This segmentation allows independent optimization of lens weight for photography capability while keeping the stabilization system burden minimal.
3Ease of operation
If separate assemblies are used for fastening and movable components, then assembly flexibility is improved, but the internal structure becomes less compact and assembly efficiency decreases
Solution Approach 1:
The patent merges the fastening assembly and movable assembly into a single integrated circuit board structure. The circuit board simultaneously provides mechanical support, electrical connections, and mounting functions for both the lens and image sensor assemblies. This integration reduces the number of separate components, simplifies the internal structure, and improves assembly efficiency while maintaining the necessary flexibility for stabilization movement.
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
The image sensor displacement approach achieves improved image stabilization with reduced weight and size, enabling larger stabilization angles with lower thrust, and facilitates a more compact and lightweight camera module suitable for mobile devices.
Implementation Method 1
The first magnetic driver group and the second magnetic driver group are configured to cooperatively drive the one or more suspended beam assemblies to move relative to the camera module
Data Source
AI summary
A camera and an electronic device are provided to improve image stabilization. The camera provides an integrated circuit board that includes a fastening assembly and a movable assembly. The movable assembly includes an image sensor carrying assembly, one or more suspended beam assemblies, and one or more flexible assemblies. The image sensor carrying assembly is configured to carry an image sensor. The one or more suspended beam assemblies are configured to fasten a first magnetic driver group or a second magnetic driver group. The one or more suspended beam assemblies and the image sensor carrying assembly are connected to the fastening assembly through the one or more flexible assemblies. The entire circuit board is compact in structure, and the first magnetic driver group or the second magnetic driver group may be directly fastened to the circuit board to drive the image sensor.