Camera Module Slant Portion Reducing Lens Flare
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Solution Overview
Problem
As electronic devices with camera modules become slimmer, the limited space makes it challenging to prevent the flare phenomenon caused by light being reflected back into the lens, which is exacerbated by the reduced thickness of the lens barrel and the difficulty in accommodating additional structures to mitigate this issue.
Innovation Solution
The camera module design incorporates a sub-housing with a slant portion that increases in height towards the optical axis direction, which helps in reducing the reflection of light back into the image sensor, thereby minimizing the flare phenomenon without the need for additional structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the lens barrel thickness is reduced to make the camera module slimmer, then the overall device size is reduced, but the flare phenomenon is exacerbated due to limited space for additional structures
Solution Approach 1:
The patent introduces a slant portion that extends in the optical axis direction (vertical dimension) from the frame portion, creating a stepped structure. This dimensional change allows the slant portion to intercept reflected light paths without requiring additional horizontal space, thus preventing flare while maintaining compact module dimensions.
Solution Approach 2:
The slant portion acts as an intermediary structure between the frame portion and the opening. It intercepts reflected light before it can re-enter the lens, serving as a mediator that blocks harmful light paths without requiring separate additional components or increasing overall module size.
2Object-affected harmful factors
If additional structures are added to prevent flare, then the flare phenomenon is reduced, but the device complexity and space requirements increase
Solution Approach 1:
The patent merges the flare prevention function into the existing frame portion by adding a slant portion. Instead of using a separate dedicated flare prevention component, the frame structure itself is modified to perform both structural support and light blocking functions, thereby reducing overall device complexity.
Solution Approach 2:
The frame portion is designed to serve multiple functions: providing structural support for the lens barrel and simultaneously preventing flare through its slant portion. This multi-functionality eliminates the need for separate dedicated flare prevention structures, reducing device complexity.
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 effectively reduces the occurrence of flare images by directing reflected light away from the image sensor, maintaining image quality while accommodating the compact size requirements of modern camera modules.
Implementation Method 1
prevent a flare phenomenon generated when light passing through a lens is input again to the lens and then diffused and reflected
Data Source
AI summary
A camera module includes a lens barrel; a housing accommodating the lens barrel; an image sensor disposed, below the lens barrel, on a substrate in an optical axis direction of the lens barrel; and a sub-housing disposed between the lens barrel and the substrate, the sub-housing comprising an opening, a frame portion disposed on an outer portion of the sub-housing to surround the opening, and a slant portion disposed on an upper side of the frame portion. A height of the slant portion increases towards a direction of the opening in the optical axis direction.