Imaging Lens Drive Module With Flexure Buffer for Stable Focusing
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Solution Overview
Problem
Conventional optical systems struggle to meet the high optical quality demands of modern electronic devices due to inadequate movement stability during focusing processes.
Innovation Solution
An imaging lens driving module with a lens carrier, guide rails, balls, a focus assembly, and flexure buffers that allow for stable movement and impact mitigation, enhancing mechanical stability and manufacturing yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional optical systems are used, then the device complexity is low, but the movement stability during focusing is insufficient
Solution Approach 1:
The optical system is divided into separate functional modules: lens group, lens carrier, guide rails, focus assembly, and buffer mechanisms. Each component performs a specific function, allowing for optimized design of movement stability without requiring complete redesign of the entire system.
Solution Approach 2:
Guide rails are introduced as intermediary components between the lens carrier and the housing to provide constrained movement paths. The buffer mechanisms act as intermediaries to absorb movement deviations and stabilize the lens position during focusing operations.
2Manufacturing precision
If high precision lens movement is achieved, then the optical quality is improved, but abnormal noises increase due to impact
Solution Approach 1:
Buffer mechanisms are pre-installed between the lens carrier and housing to cushion impacts before they occur during lens movement. This prior cushioning prevents direct impacts that generate abnormal noises while maintaining precise movement control.
Solution Approach 2:
The buffer mechanisms convert harmful impact forces into beneficial cushioning effects. By allowing controlled compression of buffer elements, the system transforms impact energy into damping force that reduces noise while maintaining movement precision.
3Ease of operation
If the lens carrier moves freely for focusing, then the focusing function is achieved, but movement stability deteriorates
Solution Approach 1:
The lens carrier is designed with dynamic characteristics that allow free movement along the optical axis for focusing while maintaining stability in lateral directions. The guide rails provide constrained degrees of freedom, enabling operational flexibility without sacrificing structural stability.
Solution Approach 2:
Different regions of the lens carrier have different mechanical properties: the focusing direction allows high mobility while lateral regions maintain high stiffness through guide rail constraints. This local differentiation of mechanical quality enables simultaneous achievement of ease of operation and stability.
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
Improves the stability and precision of lens movement, reducing abnormal noises and enhancing the mechanical stability of optical systems in electronic devices.
Implementation Method 1
The at least one flexure buffer is flexible to mitigate an impact of bumping between the at least one flexure buffer and the at least one buffer counterpart through its flexure
Implementation Method 2
The balls are disposed between the lens carrier and the base, and the balls are configured to provide the lens carrier with a degree of freedom for movement along a direction parallel to the optical axis
Data Source
AI summary
An imaging lens driving module includes an imaging lens, a lens carrier, a base, first and second balls, a focus assembly, a buffer counterpart and a flexure buffer. The lens carrier accommodates the imaging lens and includes first and second guide rails. The base includes third and fourth guide rails. The first and second balls are respectively disposed between the first and third guide rails and between the second and fourth guide rails. The focus assembly is configured to move the lens carrier. The flexure buffer is disposed on the lens carrier and/or the base. When the lens carrier is not driven by the focus assembly, the flexure buffer does not contact the buffer counterpart. The first and third guide rails each have a contact point with the first ball. The second and fourth guide rails each have a contact point with the second ball.