Reflecting Module for Optical Image Stabilization
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Solution Overview
Problem
The complexity and increased size of camera modules in portable electronic devices due to added functions like auto-focusing, zoom, and optical image stabilization (OIS) pose challenges in miniaturization and lead to higher power consumption, as existing solutions require significant driving force to move lenses or image sensors for stabilization.
Innovation Solution
A reflecting module for OIS is designed with a housing, rotation holder, and driving part, utilizing a pulling yoke and magnets to support the rotation holder, allowing it to move relative to the housing with minimal weight and power consumption, thereby changing the light path without moving the lens or image sensor, thus implementing OIS with reduced size and power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lens or image sensor is directly moved for optical image stabilization, then OIS function is achieved, but the weight of moving components increases and power consumption increases
Solution Approach 1:
The patent extracts the stabilization function from the heavy lens/image sensor assembly and relocates it to a separate reflecting member (mirror) that can be moved independently. The reflecting member is positioned to redirect light onto the stationary image sensor, allowing OIS to be achieved by moving only the lightweight reflecting member rather than the entire lens-sensor assembly.
Solution Approach 2:
The reflecting member acts as an intermediary between the lens and image sensor. By introducing this intermediate element that can be independently actuated, the system decouples the stabilization function from the heavy imaging components, enabling lightweight OIS implementation through magnetic actuators that move only the reflecting member.
2Adaptability or versatility
If various functions are added to camera modules, then functionality is improved, but device complexity and size increase
Solution Approach 1:
The reflecting member is nested within the camera module housing in a space-efficient configuration. The rotation holder that supports the reflecting member is rotatably coupled to the housing, allowing compact integration of the OIS mechanism within the existing camera module footprint without requiring additional external space.
Solution Approach 2:
The patent employs a dynamic rotation holder that can rotate relative to the housing to adjust the angle of the reflecting member. This dynamic mechanism enables OIS functionality through rotational movement rather than requiring complex linear actuation systems, simplifying the overall structure while maintaining versatility.
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 enables miniaturization of portable electronic devices while maintaining OIS functionality, reducing power consumption and maintaining performance by changing the light path using a lightweight rotation holder, thus addressing the size and power challenges of existing camera modules.
Implementation Method 1
a pulling yoke disposed in the housing so that the rotation holder is supported by the sidewall of the housing by attractive force between the pulling yoke and a magnet disposed on a lower surface of the rotation holder
Data Source
AI summary
There are provided a reflecting module for optical image stabilization (OIS) and a camera module including the same. The reflecting module for OIS includes: a housing; a rotation holder supported by a sidewall of the housing through a rotation frame; a reflecting member provided on the rotation holder; a driving part providing driving force to the rotation holder so that the rotation holder is moved relative to the housing; and a pulling yoke provided in the housing so that the rotation holder is supported by the sidewall of the housing by attractive force between the pulling yoke and a magnet of the driving part provided on a lower surface of the rotation holder.