Camera Module Guide Structure for Lens Alignment
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Solution Overview
Problem
Existing camera modules face challenges such as increased friction torque during zooming, lens decentering, lens tilting, and magnetic interference, which affect image quality and resolution, especially in ultra-slim and ultra-small designs.
Innovation Solution
A driving device and camera module design that incorporates a second guide part with a first guide part, an optical unit, and driving parts to tilt the optical unit, minimizing friction torque and preventing lens decentering or tilting, while also reducing magnetic interference and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the separation distance is increased to reduce friction torque, then friction torque resistance decreases, but lens decentering and tilting are deepened during zoom movement
Solution Approach 1:
The guide structure is divided into a guide groove and a guide protrusion that engage with each other, creating a segmented guidance system. This segmentation allows the lens barrel to move smoothly along the optical axis while the guide protrusion prevents radial displacement, thereby reducing friction torque without causing lens decentering or tilting.
2Adaptability or versatility
If a zoom lens with multiple lens groups is used to achieve zooming function, then zooming capability is improved, but alignment between lens groups and image sensor becomes difficult to maintain
Solution Approach 1:
Each lens group is housed in a separate lens barrel with its own guide structure, allowing independent movement along the optical axis during zooming. The guide groove and guide protrusion ensure that each lens group maintains proper alignment with the image sensor while moving, preventing decentering and tilting that would otherwise occur with multiple moving lens groups.
3Volume of moving object
If the camera module is designed to be ultra-slim and ultra-small, then device size is reduced, but space for OIS operation is limited
Solution Approach 1:
The guide structure uses a vertical arrangement where the guide groove extends along the optical axis direction, allowing the lens barrel to move vertically for OIS correction while maintaining a compact horizontal footprint. This dimensional arrangement enables OIS operation in an ultra-slim camera module by utilizing the depth dimension rather than requiring additional lateral space.
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 effectively reduces friction torque, minimizes lens alignment issues, and prevents magnetic interference, resulting in improved image quality, reduced power consumption, and the ability to implement Optical Image Stabilization (OIS) in ultra-slim camera modules.
Implementation Method 1
a first driving part disposed in the optical unit; and a second driving part disposed to face the first driving part
Data Source
AI summary
An embodiment of the present invention relates to a driving device comprising: a second guide part; a first guide part disposed in the second guide part; an optical unit disposed in the first guide part; a first driving part disposed in the optical unit; and a second driving part disposed opposite to the first driving part, wherein the first guide part comprises: a first fixing part coupled to the second guide part; a first moving part connected to the optical unit; and a first connection part for connecting the first fixing part to the first moving part, and the optical unit is tilted about the first connection part by the first moving part.