Imaging Lens Module With Unequal Rollers for Assembly Alignment
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Solution Overview
Problem
Conventional optical systems in electronic devices face challenges in achieving high image quality while maintaining compactness, due to complex structures and assembly errors that lead to increased defective rates.
Innovation Solution
The imaging lens driving module incorporates a lens system with a lens holder assembly, a base with guiding grooves, a rollable support assembly, and a driving mechanism, allowing for parallel movement of the lens holder assembly relative to the base, and ensuring proper alignment through distinct diameters of rollable support elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional optical systems use complex structures to achieve high image quality, then image quality is improved, but device size and structure complexity increase
Solution Approach 1:
The optical system is divided into multiple independent lens groups (first lens group with positive refractive power, second lens group with negative refractive power, third lens group with positive refractive power). Each group can be independently optimized and assembled, reducing overall structural complexity while maintaining high image quality through precise group-level control
Solution Approach 2:
Different lens groups are assigned specific optical functions and characteristics (positive/negative refractive powers). The first lens group handles primary convergence, the second handles divergence and aberration correction, and the third handles final focusing. This local optimization of quality attributes allows high overall image quality without requiring every component to be maximally complex
2Adaptability or versatility
If conventional optical systems add functionalities like auto focus and optical image stabilization, then functionality is improved, but device size increases
Solution Approach 1:
The lens holder assembly serves multiple functions: it supports the lens groups, enables auto-focus through axial movement, provides optical image stabilization through lateral correction, and maintains precise alignment. This multi-functional design eliminates the need for separate mechanisms for each function, keeping device size compact while achieving high adaptability
Solution Approach 2:
The patent combines auto-focus and optical image stabilization functionalities into a single integrated lens holder assembly structure. The same holder that enables axial movement for focusing also provides lateral correction capability, merging what would traditionally require separate mechanisms into one unified structure, thereby reducing overall device volume
3Ease of manufacture
If conventional optical systems use traditional assembly methods, then assembly is straightforward, but assembly errors and warpage increase defective rate
Solution Approach 1:
The lens groups are pre-assembled into the lens holder assembly with precise positioning features before final integration. The lens holder assembly is pre-configured with guiding grooves and support structures that ensure correct alignment. This preliminary preparation of sub-assemblies with built-in alignment features simplifies the final assembly process while minimizing assembly errors and warpage, thereby reducing defective rate
Solution Approach 2:
The lens holder assembly acts as an intermediary component between the lens groups and the mounting structure. It provides a stable intermediate platform with integrated guiding features that facilitate precise assembly while compensating for potential warpage. This intermediary structure simplifies the assembly process by providing reference surfaces and guiding mechanisms, reducing assembly errors without complicating the overall manufacturing process
Data Source
AI summary
An imaging lens driving module includes a lens system, a lens holder accommodating optical lens elements of the lens system, a base, a rollable support assembly and a driving mechanism. The base includes first and second guiding grooves extending in a direction parallel to the optical axis, disposed opposite to each other and facing the lens holder. The rollable support assembly is in physical contact with and disposed between the lens holder and the base and includes principal and auxiliary rollable support elements. The principal rollable support element is disposed between the lens holder and the first guiding groove. The auxiliary rollable support element is disposed between the lens holder and the second guiding groove. The driving mechanism is configured to drive the lens holder to move. Diameters of the principal and auxiliary rollable support elements in physical contact with the lens holder are different from each other.