Opposed Lens-Sensor Motion for Handshake Correction in Camera Modules
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Solution Overview
Problem
The increasing weight and diameter of lenses in camera devices due to high pixelation makes it difficult to secure sufficient electromagnetic force for moving the lens in a limited space, hindering effective handshake correction.
Innovation Solution
A camera device design that moves the image sensor and lens in opposite directions using a magnet and coil system, allowing for simultaneous movement in opposite directions to perform handshake correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the lens diameter is increased to achieve high pixelation, then the image quality is improved, but the weight and electromagnetic force requirements increase making it difficult to move the lens in limited space
Solution Approach 1:
Instead of moving only the lens to correct handshake, the patent moves both the lens and image sensor in opposite directions. This inverted approach where both components are mobile rather than just one, allows for doubled correction effect while distributing the movement burden, enabling effective handshake correction even with heavier lenses in limited space
2Device complexity
If only the lens is moved for handshake correction, then the device structure is simpler, but the correction angle and speed are limited
Solution Approach 1:
The patent merges the handshake correction functions of both the lens and image sensor, making them work together in opposite directions. This combination of two moving components achieves doubled correction angle and speed compared to moving only one component, while the structures are integrated sharing common support elements like the first and second elastic members
3Measurement precision
If the lens weight is increased for high pixelation, then the image resolution is improved, but the electromagnetic force available in limited space becomes insufficient
Solution Approach 1:
The patent applies counterweight principle by moving the image sensor in the opposite direction to the lens movement. This creates a balanced system where the movement of one component compensates for the other, effectively doubling the correction effect while reducing the electromagnetic force requirement for each individual component, making it feasible to move heavier lenses in limited 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
This design doubles the correction angle and speed while reducing current consumption by half compared to traditional methods where only one component is moved.
Implementation Method 1
there is a problem in that it is difficult to secure electromagnetic force for moving the lens in a limited space
Data Source
AI summary
The present embodiment relates to a camera device comprising: a base; a lens disposed on the base; a substrate unit being coupled to an image sensor, a coil coupled to the substrate; and a magnet disposed to correspond to the coil, wherein the lens and the image sensor move in a direction opposite to each other by the magnet.