Optical Lens Actuator Layout to Reduce Sensor Magnetic Noise
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lens systems in digital cameras suffer from image quality deterioration due to magnetic noise generated by driving units during focus adjustment, which is not effectively addressed by current technologies.
Innovation Solution
The optical apparatus employs a configuration where the booster transformer and inductor are positioned closer to the object side and overlap with the VCM and vibration wave motor units, minimizing their proximity to the image sensor to reduce magnetic noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If driving units (VCM, vibration wave motor) are positioned close to the circuit board for compact design, then device size is reduced, but magnetic noise interferes with circuit components causing image quality deterioration
Solution Approach 1:
The patent positions driving units to overlap with circuit components when viewed from the optical axis direction, utilizing the depth dimension (optical axis direction) to separate magnetic noise sources from sensitive circuit areas. This spatial arrangement in three-dimensional space allows compact lateral footprint while maintaining magnetic isolation through strategic positioning at different depths along the optical axis.
Solution Approach 2:
The support member structure serves as an intermediary element that physically separates and positions the driving units relative to circuit components. By mounting driving units on the support member and strategically positioning them to overlap circuit areas from the optical axis view, the support member mediates between the need for compactness and magnetic noise reduction.
2Adaptability or versatility
If multiple driving units are used to move multiple lens units for focus adjustment, then imaging functionality is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple driving units (VCM and vibration wave motor) on a single support member structure, integrating their mounting and positioning functions. This merging approach consolidates the complexity of managing multiple actuators into a unified mechanical platform, simplifying assembly and spatial management while maintaining advanced imaging capabilities.
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 suppresses image quality deterioration by reducing magnetic noise, allowing for a compact design while maintaining high image quality.
Implementation Method 1
a second driving unit configured to drive the second optical element
Implementation Method 2
a first driving unit configured to drive the first optical element
Data Source
AI summary
A lens apparatus comprises a second lens unit and a fourth lens unit supported so as to be movable in an optical axis direction, a vibration wave motor unit configured to drive the second lens unit, a VCM configured to drive the fourth lens unit, a fixed barrel that supports the vibration wave motor unit and the VCM, a booster transformer constituting the vibration wave motor unit, an inductor constituting the VCM, and a flexible printed circuit board on which the booster transformer and the inductor are mounted. At least one of the vibration wave motor unit and the VCM overlaps at least one of the booster transformer and the inductor when viewed from the optical axis direction.