Reflecting Module OIS Mechanism for Smaller, Lower-Power Camera Modules
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Solution Overview
Problem
The increasing complexity and size of camera modules with optical image stabilization (OIS) functions in portable electronic devices, such as smartphones and tablets, pose challenges in miniaturization due to the need for moving lenses and image sensors, which require significant driving force and increased power consumption.
Innovation Solution
A reflecting module for OIS that includes a housing with a rotation holder and a reflecting member, utilizing bearings and a driving part to rotate the holder around multiple axes, reducing the need to move lenses or image sensors, thereby minimizing size and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lenses or image sensors are moved for optical image stabilization, then OIS functionality is achieved, but device size and power consumption increase
Solution Approach 1:
The patent extracts the OIS function from the lens or image sensor movement mechanism and implements it through a separate reflecting member that can be rotated independently. This allows the lens and image sensor to remain stationary while still achieving image stabilization through the movement and repositioning of the reflecting member, thereby reducing the overall size of the moving components required for OIS.
Solution Approach 2:
The reflecting member acts as an intermediary element between the light path and the image sensor. By rotating the reflecting member rather than moving the lens or image sensor directly, the patent creates a mediating mechanism that achieves image stabilization with smaller, lighter components. The reflecting member redirects light paths to compensate for device movement without requiring the heavy movement of the entire lens assembly or image sensor.
2Reliability
If lenses or image sensors are moved for optical image stabilization, then OIS functionality is achieved, but power consumption increases
Solution Approach 1:
The patent separates the OIS function from the heavy movement of lenses or image sensors by using a lightweight reflecting member that can be rotated with minimal driving force. This extraction of the OIS function to a separate, lighter component significantly reduces the power consumption required for stabilization while maintaining the same functional effectiveness.
Solution Approach 2:
The patent replaces the mechanical system of moving heavy lenses or image sensors with a lighter mechanical system involving the rotation of a reflecting member. This substitution uses a driving part that requires much less force and therefore consumes less power, while still achieving the same image stabilization effect through optical path manipulation rather than direct movement of the imaging components.
3Adaptability or versatility
If camera module structures are made complicated to implement OIS functions, then functionality is improved, but device miniaturization becomes difficult
Solution Approach 1:
The patent segments the camera module into distinct functional components: a stationary lens assembly, a stationary image sensor, and a separately movable reflecting member. This segmentation allows the OIS function to be implemented through the rotation of the reflecting member rather than through complex coordinated movement of multiple heavy components, simplifying the overall structure while maintaining functionality.
Solution Approach 2:
The patent extracts the OIS control mechanism from the lens and image sensor assemblies, creating an independent reflecting member that can be rotated to achieve stabilization. This extraction simplifies the structure by separating the stabilization function from the imaging components, reducing the complexity of the overall camera module while maintaining full OIS capability.
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 solution allows for miniaturization of camera modules while maintaining OIS functionality with reduced power consumption by rotating a reflecting member instead of moving lenses or image sensors, thus preserving device compactness and efficiency.
Implementation Method 1
first balls aligned in a first axis direction provided on a surface of the rotation plate facing the inner wall of the housing; and second balls aligned in a second axis direction perpendicular to the first axis direction provided on a surface of the rotation plate facing the rotation holder
Implementation Method 2
a pulling magnet provided on one of the housing and the rotation holder; and a pulling yoke provided on a remaining one of the housing and the rotation holder; wherein the rotation holder may be supported by the inner wall of the housing via the rotation plate by an attractive force between the pulling magnet and the pulling yoke
Data Source
AI summary
A reflecting module for optical image stabilization (OIS) includes a housing; a rotation holder provided in the housing and comprising a reflecting member; a rotation plate provided in the housing between an inner wall of the housing and the rotation holder so that the rotation holder is supported by the inner wall of the housing via the rotation plate; and a driving part configured to apply a driving force to the rotation holder to move the rotation holder.