Camera Module Lens Movement Perpendicular to Optical Axis
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Solution Overview
Problem
Portable electronic devices face challenges in miniaturization due to the difficulty in implementing optical zooming functions in camera modules, as the necessary moving space for lens parts increases the device's thickness, making it hard to integrate autofocusing and optical image stabilization while maintaining a compact size.
Innovation Solution
A camera module design that includes a carrier with a first driving part for moving the carrier in the optical axis direction and a second driving part using a guide member and magnets/coils to move lenses perpendicularly, allowing for optical zooming without increasing the device's thickness by positioning the optical axis of the lens parts perpendicular to the device's thickness direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical zooming is implemented by moving the lens in the optical axis direction, then image quality is improved, but the device thickness increases
Solution Approach 1:
The patent changes the movement direction of the lens from the optical axis direction to a direction perpendicular to the optical axis. The lens is moved along the thickness direction of the device (Y-axis) rather than along the optical axis (Z-axis), enabling optical zooming without increasing device thickness in the optical axis direction.
Solution Approach 2:
Instead of moving the lens forward along the optical axis to achieve zooming, the patent inverts the approach by moving the lens in the opposite direction (perpendicular to optical axis). The lens holder is displaced in the Y-axis direction, causing the lens to move laterally rather than axially, thus achieving zooming effect without axial extension.
2Measurement precision
If optical zooming is implemented, then image quality is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into a single driving mechanism. The same driving assembly (magnet and coil) is used to achieve both optical zooming (lens movement perpendicular to optical axis) and autofocusing (lens movement along optical axis), reducing the number of separate actuators and simplifying the overall device structure.
Solution Approach 2:
The driving assembly with magnet and coil serves multiple purposes: it can generate electromagnetic force to move the lens holder perpendicular to the optical axis for zooming, and also move the lens along the optical axis for focusing. This multi-functional design reduces device complexity by eliminating the need for separate dedicated actuators for each function.
3Adaptability or versatility
If lens moving space is provided for optical zooming, then optical zooming function is achieved, but the device size increases
Solution Approach 1:
The patent utilizes the thickness direction (Y-axis) of the device as the movement space for optical zooming, rather than requiring additional space in the optical axis direction (Z-axis). By moving the lens holder perpendicular to the optical axis, the device achieves zooming capability without increasing its frontal area or requiring extended lens travel distance along the viewing direction.
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
Enables the implementation of optical zooming, autofocusing, and optical image stabilization functions in a compact form factor, allowing for the miniaturization of portable electronic devices by utilizing a unique lens movement mechanism that does not require additional thickness for actuator placement.
Implementation Method 1
The first driving part may include a first magnet disposed on the carrier, and a first coil disposed to face the first magnet
Implementation Method 2
The second magnet and the second coil may react to each other to generate driving force in a direction perpendicular to the optical axis direction
Data Source
AI summary
A camera module includes a carrier accommodating lenses, a housing accommodating the carrier, a first driving part configured to move the carrier in an optical axis direction, and a second driving part configured to move at least one lens of the lenses relative to the carrier in the optical axis direction.