Lens Driving Device with Integrated Optical Path Changing Member
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge is to secure sufficient light in miniaturized camera devices while implementing an optical image stabilizer (OIS) function, as higher pixel density leads to smaller pixels receiving less light, and space constraints limit the size of the lens and the actuator for OIS.
Innovation Solution
A lens driving device is designed with a first lens and an optical path changing member that can be simultaneously tilted about a first axis and individually tilted about a second axis, supported by a plurality of support portions and driven by a unit that includes magnets and coils, allowing for independent rotation of optical members to secure light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the lens size is increased to increase the amount of received light, then the light receiving capability is improved, but the space occupied by the actuator for OIS increases, making miniaturization difficult
Solution Approach 1:
The patent merges the lens holder and optical path changing member holder into a single integrated holder structure. This integration allows both the lens and optical path changing member to be tilted simultaneously about a first axis while maintaining individual tilting capability about a second axis, thereby achieving OIS function with reduced space requirements compared to separate actuator arrangements
Solution Approach 2:
The integrated holder structure serves multiple functions: it holds both the lens and optical path changing member, provides simultaneous tilting about the first axis for OIS, and enables individual tilting about the second axis. This multi-functionality eliminates the need for separate actuators, reducing the overall space occupied while maintaining light receiving capability
2Volume of moving object
If the camera module is miniaturized to meet ultra-slim requirements, then the device size is reduced, but the space for arranging the OIS actuator and lens is insufficient
Solution Approach 1:
By integrating the lens holder and optical path changing member holder into a single structure, the patent reduces the total space required for OIS components. The integrated holder allows both components to share the same mounting space while maintaining independent tilting capabilities, enabling camera module miniaturization without compromising OIS functionality
Solution Approach 2:
The patent employs multi-axis tilting mechanisms that operate in different dimensional spaces. The simultaneous tilting about the first axis and individual tilting about the second axis utilize orthogonal rotational dimensions, allowing compact arrangement of optical components while maintaining full OIS capability in a miniaturized form factor
3Measurement precision
If the pixel density is increased to improve resolution, then the image quality is improved, but the amount of light received by each pixel decreases, worsening image shake in dark environments
Solution Approach 1:
The patent replaces traditional mechanical image stabilization methods with an optical path changing mechanism. By using a reflective optical path changing member that can be tilted independently, the system corrects image shake through optical path adjustment rather than mechanical lens or sensor movement, enabling effective OIS with high pixel density sensors while maintaining adequate light reception
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 solution enables the miniaturization of camera devices while ensuring sufficient light is received, improving optical performance by allowing independent rotation of optical members, and effectively implementing the OIS function without degrading image quality.
Implementation Method 1
an optical path changing member configured to change a path of light incident from the first lens and emit the light
Implementation Method 2
driven by a unit that includes magnets and coils
Data Source
AI summary
A lens driving device according to an embodiment of the present invention comprises: a first lens; and an optical path-changing member that changes the path of light incident from the first lens and emits same, wherein the first lens and the optical path-changing member are arranged so as to be tilted simultaneously with respect to a first axis and to be tilted separately with respect to a second axis.