Camera Module Stopper Layout for Lower Optical Stack Height
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Solution Overview
Problem
Conventional camera modules have a relatively large height due to the positioning of the lens assembly above the image sensor assembly, making it difficult to meet the requirements for thinner and more compact designs.
Innovation Solution
The camera module design moves the stopper outward to the outer side of the filter element, positioning it lower than the filter element, and arranges the lens assembly on a support substrate with a movable part constrained by the stopper, allowing the stopper and photosensitive assembly to partially overlap, reducing the overall height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lens assembly is positioned entirely above the image sensor assembly, then the focusing and optical image stabilization functions can be achieved, but the overall height of the camera module becomes relatively large
Solution Approach 1:
The stopper is positioned on the outer side of the filter element, allowing the lens assembly and photosensitive assembly to overlap partially in the optical axis direction. This nested arrangement enables the lens assembly to be positioned above the image sensor assembly for functional operation, while the stopper extends laterally to limit movement without increasing the overall height of the camera module
2Reliability
If a stopper made of cushioning material is used to limit the movement of the movable part, then debris generation and deformation are reduced, but the overall height of the camera module increases
Solution Approach 1:
Instead of extending the stopper vertically to provide cushioning protection, the stopper is positioned horizontally on the outer side of the filter element. This dimensional change allows the stopper to limit the movement of the movable part and protect against debris through lateral positioning rather than vertical extension, thereby reducing the overall height of the camera module while maintaining protective function
Data Source
AI summary
A camera module includes a photosensitive assembly and a lens assembly, the photosensitive assembly includes a support substrate, a photosensitive chip, and a filter element, wherein the filter element is at least partially located above the support substrate, the lens assembly includes a movable part, an optical lens, and a stopper for limiting a movement of the movable part, wherein the optical lens is arranged on the movable part, and the optical lens is located in the photosensitive path of the photosensitive chip, wherein the stopper is located on an outer side of the filter element, and a lower surface of the stopper is lower than an upper surface of the filter element.