Camera Module Reflective Actuator Low Magnetic Field Design
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Solution Overview
Problem
Existing camera modules face challenges in implementing a low magnetic field design while maintaining sufficient driving force for lens movement, especially for high-magnification zoom functions, which increases power consumption and complicates the design.
Innovation Solution
The camera module incorporates multiple lens modules with different optical axes and reflective members that change the light path, allowing for adjustable magnification and focus without relying solely on lens movement. This design includes drivers to move the reflective members, reducing the need for large magnetic fields and minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the lens is driven using a VCM actuator to implement high-magnification zoom, then the magnification function is improved, but the length of the magnet increases and power consumption increases
Solution Approach 1:
The patent replaces the conventional VCM actuator that directly drives the lens with a magnetic field actuator that drives the lens through magnetic force. This substitution allows for more efficient energy utilization and reduced power consumption while maintaining the high-magnification zoom capability. The magnetic field actuator generates force through electromagnetic interaction rather than mechanical contact, reducing energy losses.
Solution Approach 2:
The patent optimizes the magnetic field actuator parameters including the magnet intensity, coil configuration, and driving current to achieve the required driving force with minimal power consumption. By carefully adjusting these parameters, the system can provide sufficient force for high-magnification zoom while consuming less power compared to conventional VCM actuators.
2Object-affected harmful factors
If the intensity of permanent magnets is reduced to implement low magnetic field design, then magnetic field interference is reduced, but the driving force becomes insufficient
Solution Approach 1:
The patent replaces permanent magnets with an electromagnetic actuator system consisting of coils and soft magnetic materials. This substitution allows dynamic control of the magnetic field strength - the field can be strong when needed for driving the lens and weak when not needed, thereby reducing interference with peripheral electronic components while maintaining sufficient driving force during operation.
Solution Approach 2:
The magnetic field intensity is made dynamic rather than static. The actuator generates magnetic field only when lens movement is required, and the intensity can be precisely controlled based on the instantaneous needs. This dynamic approach allows the system to minimize magnetic field interference during non-operational periods while providing adequate driving force when needed.
3Adaptability or versatility
If the lens moves a relatively long distance to implement high-magnification zoom, then the magnification function is improved, but the low magnetic design becomes more difficult to implement
Solution Approach 1:
The patent uses an electromagnetic actuator with soft magnetic materials and optimized coil configurations to achieve long-distance lens movement with reduced magnetic field intensity. The soft magnetic materials concentrate and guide the magnetic field efficiently, allowing the lens to traverse longer distances without requiring proportionally higher magnetic field strengths, thus reducing interference with surrounding components.
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 configuration effectively adjusts magnification and focus with reduced power consumption and magnetic field interference, enabling a more compact and efficient camera module design.
Implementation Method 1
a plurality of reflective members configured to change a path of light passing through at least one of the plurality of lens modules
Data Source
AI summary
A camera module includes a plurality of lens modules having mutually different optical axes, a plurality of reflective members configured to change a path of light passing through at least one of the plurality of lens modules, and a housing having an internal space in which at least one of the plurality of lens modules is disposed. The plurality of lens modules include a first lens module including at least one lens disposed along a first optical axis, a second lens module including at least one lens disposed along a second optical axis, and a third lens module including at least one lens disposed along a third optical axis. The plurality of reflective members include a first reflective member opposing both the first lens module and the second lens module, and a second reflective member opposing both the second lens module and the third lens module.