Optical Element Driving Mechanism Using Flexible Ring Members
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Solution Overview
Problem
Conventional electromagnetic driving modules for lens systems are bulky, costly, and have high power consumption due to complex construction and require suspension wires that hinder thickness reduction and stable movement.
Innovation Solution
An electromagnetic driving module design that omits suspension wires by using flexible ring members to connect the movable and fixed portions, allowing for perpendicular movement with reduced elastic constants, facilitating thinner designs and lower power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If suspension wires are used to connect movable portion to fixed portion, then the movable portion can be moved perpendicular to the optical axis, but the thickness of the driving module increases
Solution Approach 1:
The patent replaces traditional suspension wires with flexible printed circuit boards (FPC) that have a planar structure. The FPC extends in a plane perpendicular to the optical axis, allowing the movable portion to move while maintaining a thin profile. The flexible nature of the FPC enables movement without significantly increasing the module thickness.
Solution Approach 2:
The suspension wires are reconfigured from a linear arrangement along the optical axis to a planar arrangement perpendicular to the optical axis. This dimensional change allows the flexible circuit to accommodate movement while minimizing thickness in the optical axis direction.
2Ease of operation
If conventional driving members (stepper motor, ultrasonic motor, piezoelectric actuator) are used to generate motive power, then the lens can be driven, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent replaces complex mechanical driving members (stepper motors, ultrasonic motors, piezoelectric actuators) with a simplified electromagnetic driving assembly. This assembly uses electromagnetic forces to directly drive the lens, eliminating the need for complex mechanical transmission elements and reducing overall device complexity.
Solution Approach 2:
The patent extracts and removes the complex transmission elements from the driving system, keeping only the essential electromagnetic driving assembly. This simplification reduces manufacturing cost and device complexity while maintaining the required lens driving capability.
3Ease of operation
If conventional driving members with complex transmission elements are used, then the lens can be driven, but the power consumption increases
Solution Approach 1:
The patent replaces mechanical transmission systems with a direct electromagnetic driving mechanism. This substitution eliminates energy losses associated with mechanical friction and transmission inefficiencies, resulting in lower power consumption while maintaining effective lens driving capability.
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 enables a thinner, more efficient electromagnetic driving module with reduced power consumption and improved movement stability, suitable for thin applications while maintaining effective optical axis alignment.
Implementation Method 1
an OIS driving assembly configured to drive the movement of the movable portion relative to the fixed portion in a direction that is perpendicular to the main axis
Implementation Method 2
a focusing driving assembly configured to drive the movement of the lens holder relative to the frame in the main axis
Implementation Method 3
The first flexible assembly includes a first outer ring flexible member connecting the movable portion to the fixed portion and a first inner ring flexible member connecting the lens holder to the frame
Data Source
AI summary
An optical element driving mechanism is provided, including: a fixed portion; a movable portion movably connected to the fixed portion and includes a frame and a holder, wherein an optical element having an optical axis is connected to the movable portion; a first driving assembly disposed in the fixed portion to move the movable portion relative to the fixed portion; and a resilient element, including: an outer resilient element, including: a first segment having a strip-shaped structure; a second segment having a strip-shaped structure; and a first bending segment, wherein the first segment connects to the second segment through the first bending segment, and the frame is movably connected to the fixed portion through the outer resilient element; and an inner resilient element, wherein the holder is movably connected to the frame through the inner resilient element.