Imaging Lens Assembly with Single-Piece Light Blocking Aperture
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Solution Overview
Problem
Existing imaging lens assemblies in portable electronic devices face challenges in achieving optimal imaging performance due to inadequate control of light sources and inconsistent light blocking, which affects image quality and adaptability to varying lighting conditions.
Innovation Solution
An imaging lens assembly featuring a single-piece-formed light blocking sheet with specific geometric configurations, including light blocking structures and radius structures, that control light entry through a central aperture to maintain ideal imaging conditions and prevent excessive light blocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light blocking sheet is added to control light sources, then imaging performance is improved, but device complexity increases
Solution Approach 1:
The light blocking sheet integrates multiple functions into a single component: it blocks unwanted light sources, defines the aperture shape, and supports the optical lens elements. This merging approach improves imaging performance while avoiding the complexity of multiple separate components.
Solution Approach 2:
The light blocking sheet serves multiple purposes simultaneously: it acts as an aperture stop, a light shield, and a structural support element. This multi-functionality resolves the contradiction by achieving better imaging control without proportionally increasing device complexity.
2Use of energy by moving object
If light blocking structures are added to prevent excessive light blocking, then light collection is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies precise parameter ranges for the light blocking structures, including the distance from the aperture center (0.3-0.7 times the aperture radius) and the number of structures (3-12). These parameter optimizations enable effective light collection while maintaining manufacturability within reasonable precision tolerances.
3Reliability
If the aperture is made smaller to maintain high f-numbers, then imaging performance is improved, but light collection capability deteriorates
Solution Approach 1:
The light blocking structures are strategically positioned at specific locations around the aperture center (at 0.3-0.7 times the aperture radius), creating localized light control zones. This allows the aperture to maintain a relatively large overall size for light collection while having specific local regions that block unwanted light paths, thus preserving imaging performance.
Data Source
Figure 1A
Figure 1B
Figure 2A~2B
AI summary
An imaging lens assembly includes a plurality of optical lens elements, a single-piece-formed light blocking sheet and a lens barrel. The lens barrel has a circular light-passing hole corresponding to the plurality of optical lens elements and the single-piece-formed light blocking sheet. The single-piece-formed light blocking sheet has a central aperture corresponding to the lens barrel and the plurality of optical lens elements. A maximum aperture diameter is defined by the central aperture. The single-piece-formed light blocking sheet comprises a plurality of light blocking structures surrounding and disposed adjacent to the central aperture. A minimum inner radius of the central aperture is defined near the center of each of the light blocking structures.