Compact Lens Module Filter Switcher Design
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Solution Overview
Problem
Existing lens modules with wide-angle capabilities and short focal lengths face challenges in accommodating a filter-switching mechanism due to space constraints, leading to potential filter separation and poor physical reliability.
Innovation Solution
The lens module incorporates a thin filter switcher with a mounting frame and holder design that includes thin adhesive layers and strategically placed bumps, enhancing the bond strength and reducing the overall thickness of the filter switcher.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thick filter-switching mechanism is used, then the filters can be securely mounted on the holder, but the overall thickness increases making it difficult to mount in the restricted space between the lens and circuit board
Solution Approach 1:
The patent transitions from using thick adhesive layers (one-dimensional thickness increase) to using structural support bumps and optimized holder design (utilizing vertical and lateral dimensions for support). The holder includes bumps that extend downward to provide support, while the adhesive layer thickness is reduced, thus resolving the contradiction between reliability and thickness by utilizing multiple spatial dimensions for structural support.
Solution Approach 2:
The patent applies different structural features at different locations: the holder has bumps at specific positions to provide localized support where needed, while the adhesive layer is applied in optimized patterns. This local differentiation allows the filter to be securely mounted without requiring uniform thickness throughout the entire filter-switching mechanism, thereby reducing overall thickness while maintaining reliability.
2Length of stationary object
If thin adhesive layers are used to reduce the thickness of the filter switcher, then the overall thickness is reduced for compact design, but the bond strength between the filter and holder decreases leading to easy separation
Solution Approach 1:
The patent segments the support function into two distinct components: structural support provided by the holder bumps and bonding function provided by the adhesive layer. The bumps bear the mechanical load and prevent separation, while the thin adhesive layer provides sufficient bonding. This segmentation allows the adhesive layer to be thin without compromising overall bond strength, as the bumps assume the primary support role.
Solution Approach 2:
The holder bumps act as intermediaries between the filter and the mounting structure. Instead of relying solely on the adhesive layer to provide both bonding and structural support, the bumps serve as intermediate support elements that reduce the burden on the adhesive layer, allowing it to be thin while maintaining adequate bond strength.
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
This design allows for a lens module with a wide-angle and short focal length capability, improving the structural stability and reliability of the filter switcher while maintaining a compact form factor.
Implementation Method 1
each filter may be adhered on the holder through an adhesive layer
Data Source
AI summary
A lens module, constructed to include all necessary filters but retaining its wide-angle characteristic and short focal length, is comprised of a housing, a cover plate, and a filter switcher. The housing and the cover plate form a receiving cavity, the cavity containing the filter switcher. The filter switcher includes holder, two mounting frames, two first adhesive layers, and two filters, and is of minimal thickness. The two first adhesive layers fix the filters on the two mounting frames. An enlarged installation space within the lens module is not required. The disclosure also relates to an electronic device using the lens module.