Reflecting Module for OIS Reducing Power Consumption
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Solution Overview
Problem
The complexity and increased size of camera modules with optical image stabilization (OIS) functions in portable electronic devices pose challenges in miniaturization, as they require significant driving force and power consumption due to the movement of lenses and image sensors for stabilization, which complicates mounting and affects device thickness.
Innovation Solution
A reflecting module for OIS is designed with a housing, a movable holder supported by an elastic member, and a driving part that moves the reflecting member relative to the housing, allowing for optical image stabilization without directly moving the lens or image sensor, thereby reducing power consumption and maintaining device miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lens or image sensor is directly moved for optical image stabilization, then stabilization function is achieved, but power consumption increases due to the weight of the lens or image sensor and other attached members
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 stabilization without moving the heavy optical components. This separation enables stabilization while minimizing power consumption.
Solution Approach 2:
The reflecting member acts as an intermediary between the light path and the image sensor. Instead of moving the image sensor directly, the patent introduces a lightweight mirror that reflects light onto the stationary sensor. This intermediary approach achieves the same stabilization effect with significantly reduced mass to be moved, thereby reducing power consumption.
2Adaptability or versatility
If various functions (autofocusing, OIS, zoom) are implemented in a camera module, then functionality is improved, but device size and complexity increase
Solution Approach 1:
The patent combines multiple camera functions (autofocusing, optical image stabilization, and zoom) into a single integrated camera module design. The reflecting member serves multiple purposes: it enables OIS by moving independently, allows autofocus through its positioning mechanism, and contributes to zoom functionality. This merging reduces overall device complexity compared to implementing separate mechanisms for each function.
Solution Approach 2:
The reflecting member is designed as a multi-functional component that contributes to multiple camera operations. It provides optical image stabilization through independent movement, enables autofocus by adjusting light path positioning, and supports zoom functionality. This universal component approach reduces the number of separate parts needed, simplifying the overall module structure.
3Adaptability or versatility
If various functions (autofocusing, OIS, zoom) are implemented in a camera module, then functionality is improved, but device size increases making mounting difficult
Solution Approach 1:
The patent employs a nested arrangement where the reflecting member is positioned within the camera module's light path in a space-efficient manner. The reflecting module is integrated into the existing optical path structure, allowing it to nest within the overall module geometry. This nesting approach minimizes the volume required while maintaining all necessary functions.
Solution Approach 2:
The reflecting member is positioned at an angle (e.g., 45 degrees) to the optical axis, utilizing a different spatial dimension to achieve light path redirection. This angular positioning allows the stabilization mechanism to operate in a direction perpendicular to the main optical path, effectively using three-dimensional space more efficiently and reducing the overall footprint of the camera module.
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 the implementation of autofocusing, zoom, and OIS functions in a compact form, reducing power consumption and maintaining device miniaturization by changing the light path using a reflecting module, which moves independently of the lens and image sensor, thus addressing the challenges of size and power consumption.
Implementation Method 1
the elastic member includes a fixed frame fixed to the housing, a movable frame disposed in the fixed frame, and a spring connecting the fixed frame and the movable frame to each other
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 to which a board is coupled, the housing including an opening, a moving holder disposed in an internal space of the housing, an elastic member fixedly coupled to the housing to support the moving holder so that the moving holder is movable, a reflecting member provided on the movable holder, and a driving part including a plurality of magnets provided on the moving holder, and a plurality of coils provided on the board and respectively opposing the plurality of magnets, wherein the plurality of coils are disposed to oppose the plurality of magnets through the opening.