Non-Circular Lens Module for Mobile Terminals
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Solution Overview
Problem
Conventional optical lens modules in mobile terminals face challenges with volume shrinkage, leading to decreased assembly strength, reduced optical quality, and ineffective suppression of stray light, especially as pixel counts increase.
Innovation Solution
The imaging lens module incorporates non-circular lens elements and optical components with specific geometric parameters, such as varying line distances and angles, to optimize optical performance and reduce stray light while maintaining structural strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the outer diameter of the lens element and optical component is enlarged to accommodate increased pixels, then the imaging quality is improved, but the volume of the lens module increases
Solution Approach 1:
The patent applies asymmetry by changing the conventional circular shape of lens elements and optical components to non-circular shapes (such as oval or rectangular with rounded corners). This shape transformation allows the effective optical area to be optimized for imaging quality while reducing the overall outer diameter and volume of the lens module, thereby resolving the contradiction between imaging quality and module volume.
2Volume of stationary object
If the outer diameter of the lens element and optical component is reduced to shrink volume, then the volume of the lens module is reduced, but the assembly strength between lens elements and optical components decreases
Solution Approach 1:
The non-circular shape design allows for optimized structural distribution of material and mounting features. The asymmetric geometry provides better mechanical interlocking and distribution of stress, maintaining assembly strength even when the overall outer diameter is reduced for volume shrinkage.
3Volume of stationary object
If the outer diameter of the lens element and optical component is reduced to shrink volume, then the volume of the lens module is reduced, but the optical quality is reduced
Solution Approach 1:
The patent applies local quality by optimizing the effective optical area distribution within the non-circular lens element geometry. The lens design concentrates optical quality in the effective imaging regions while allowing the overall shape to be compact, ensuring high optical quality is maintained even with reduced outer diameter and module volume.
4Strength
If the outer diameter of the lens element and optical component is enlarged, then the assembly strength is improved, but stray light cannot be effectively suppressed
Solution Approach 1:
The non-circular shape design, particularly with asymmetric edge configurations and non-uniform thickness distribution, effectively suppresses stray light by disrupting unwanted light paths and reflections. The asymmetric geometry prevents symmetric reflection patterns that cause ghost images and flare, while still maintaining adequate structural strength through optimized material distribution.
Data Source
AI summary
An imaging lens module includes an imaging lens assembly and a first optical component. The imaging lens assembly has an optical axis and includes a lens element. The lens element includes an effective optical portion, which is non-circular and disposed on a center of the lens element. The first optical component has a non-circular opening hole. The effective optical portion of the lens element of the imaging lens assembly is corresponded to the non-circular opening hole of the first optical component.