Camera Lens Module With Stepped Dust Trap for Sensor Protection
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Solution Overview
Problem
Camera lens modules in electronic devices are prone to scratches and dark spots on the image sensor due to particle interference, leading to deteriorated image quality and dust entry.
Innovation Solution
A dustproof structure is implemented with a stepped portion in the contact region of the camera lens assembly, featuring a shape corresponding to the support stand, and an adhesive layer to collect dust, along with a dust trap groove to prevent dust and foreign substances from entering the inner space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional camera lens assembly structure is used, then the device is simple and easy to manufacture, but dust and particles can enter the inner space and cause scratches and dark spots on the image sensor
Solution Approach 1:
The contact region is segmented into multiple levels through the stepped portion, creating distinct height zones that serve different functions: the first level provides dust collection, the second level maintains optical clearance, and the third level ensures structural support. This segmentation allows the single contact region to simultaneously achieve dust prevention and optical functionality without adding multiple separate components.
Solution Approach 2:
The stepped portion acts as an intermediary structure between the support stand and the inner housing, creating a transition zone that captures dust particles before they can reach the image sensor. This intermediary structure mediates the interaction between moving and stationary components, preventing direct contact that would generate particles while maintaining necessary mechanical support.
2Stability of the object's composition
If the contact region is made larger to improve stability, then the lens assembly is more stable, but the area where dust can accumulate increases
Solution Approach 1:
The stepped portion creates local quality variations within the contact region by establishing different height levels with distinct functions. The first level (higher) is optimized for dust collection with larger contact area, while the second level (lower) maintains smaller exposure area for optical components. This local differentiation allows the overall contact region to be large for stability while specific zones minimize dust accumulation risk.
Solution Approach 2:
The solution transitions from a two-dimensional contact surface to a three-dimensional stepped structure, adding the height dimension to the contact region. This dimensional change creates vertical separation between dust collection zones and optical zones, allowing the contact region to expand horizontally for stability while the vertical hierarchy prevents dust from reaching the image sensor.
3Reliability
If a dust trap structure is added to prevent dust entry, then image quality is protected, but the device complexity increases
Solution Approach 1:
The dust trap functionality is merged with the existing contact region between the support stand and inner housing, rather than being implemented as a separate component. The stepped portion is integrated into the contact region structure, combining mechanical support, dust collection, and optical clearance functions into a single integrated feature, thereby preventing dust entry without proportionally increasing device complexity.
Solution Approach 2:
The stepped portion serves multiple functions simultaneously: it provides structural support through contact with the support stand, collects dust particles in its recesses, maintains optical clearance for the lens assembly, and guides the positioning of the lens module. This multi-functionality allows a single structure to achieve dust prevention while replacing what would otherwise require multiple separate components.
Data Source
AI summary
Provided is an electronic device including a housing, and at least one camera lens assembly in the housing, wherein the camera lens assembly includes a cover, a camera housing on the cover, the camera housing including a lens assembly including at least one lens and a lens barrel including at least one support stand at an end, and a lens driver on the lens assembly and configured to provide power for self-focusing and optical image stabilization of the lens assembly, an inner housing on the camera housing, the inner housing including a filter and at least one contact region contacting the support stand, a printed circuit board on the camera housing and facing the filter, and a dust trap between the inner housing and the lens assembly, wherein the dust trap may include a stepped portion in the at least one contact region, the dust trap being configured to be on the at least one contact region, and having a shape corresponding to a shape of the support stand.