Camera Module Stepped Housing for Foreign Object Protection
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Solution Overview
Problem
Foreign objects introduced into the camera module can cause image deterioration and flaring, adversely affecting the camera's performance due to the lack of protection between the lens barrel and the image sensor.
Innovation Solution
A camera module design featuring stepped structures and collecting grooves between the housing and lens barrel, along with an infrared filter and adhesive materials, to prevent foreign objects from reaching the image sensor by collecting and adhering them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a predetermined space is formed between the lens barrel and the housing to enable auto-focusing, then the lens barrel can move along the optical axis for focusing adjustment, but foreign objects can be introduced into this space and reach the image sensor causing image deterioration and flaring
Solution Approach 1:
The housing through hole is divided into multiple sections with different diameters (first through hole with smaller diameter, second through hole with larger diameter), creating stepped portions that segment the space. This segmentation allows the lens barrel to move freely in the auto-focusing direction while the smaller diameter sections block foreign objects from reaching the image sensor.
Solution Approach 2:
The stepped portion with the first collecting groove acts as an intermediary structure between the lens barrel movement space and the image sensor. It provides a collection zone for foreign objects, preventing them from reaching the image sensor while not interfering with the lens barrel's auto-focusing motion.
2Object-affected harmful factors
If foreign objects are prevented from reaching the image sensor by adding protective structures, then image quality is maintained, but the device complexity increases
Solution Approach 1:
The protective function is merged with the existing housing structure by forming stepped portions and collecting grooves directly on the housing. This integration protects against foreign objects without requiring separate protective components, thereby maintaining simplicity while ensuring image quality.
Solution Approach 2:
The housing structure serves multiple functions: it provides the mounting structure for the lens barrel, defines the auto-focusing movement space, and simultaneously acts as a protective barrier against foreign objects through its stepped portions and collecting grooves. This multi-functionality reduces the need for additional protective components.
Data Source
AI summary
There is provided a camera module including: a lens barrel having one or more lenses positioned along an optical axis; and a housing having the lens barrel therein, wherein the housing includes a first through hole into which the lens barrel is inserted and a second through hole having a diameter larger than that of the first through hole.