Camera Module Support Member Extension Structure
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Solution Overview
Problem
Conventional camera modules face challenges in achieving higher imaging quality due to the difficulty in aligning the central axis of the package material body with the optical axis, which is exacerbated by the larger size of the package material body in the Z-axis direction.
Innovation Solution
A camera module design featuring a three-stage structure comprising a circuit board, a photosensitive chip, a package material body, a support member, and a lens assembly, where the support member includes an extension structure that reduces the package material body's length in the Z-axis direction, allowing for easier alignment of the optical axis and improved imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the package material body is made larger in the Z-axis direction to ensure sufficient strength as a carrier, then the structural strength is improved, but the alignment precision between the central axis of the light transmission hole and the optical axis deteriorates
Solution Approach 1:
The support structure is divided into two independent parts: the package material body and the separately mounted support member. This segmentation allows the package material body to be optimized for strength while the support member provides precise positioning features, resolving the contradiction between structural strength and alignment precision.
Solution Approach 2:
The support member acts as an intermediary component between the package material body and the lens assembly. It introduces precise positioning structures (extension structures with light blocking portions) that enable accurate alignment without requiring the package material body itself to be precisely formed, thus improving alignment precision while maintaining structural strength.
2Strength
If the package material body is made larger in the Z-axis direction to ensure sufficient strength, then the structural strength is improved, but the overall size of the camera module increases
Solution Approach 1:
The support function is segmented from the package material body and assigned to a separate support member. This allows the package material body to be shortened in the Z-axis direction while the support member provides the necessary structural support and positioning functions, thus reducing overall length while maintaining strength.
Solution Approach 2:
The support member extends in the X-Y plane with extension structures that provide positioning without significantly increasing the Z-axis length. By utilizing the lateral dimensions for positioning features, the design achieves precise alignment and sufficient strength with minimal Z-axis length.
Data Source
AI summary
A camera module includes a circuit board; a photosensitive chip coupled to the circuit board, a package material body attached on the circuit board, and a support member mounted on the package material body. The package material body has a photosensitive surface, which includes a photosensitive region. The support member includes a support body and an extension structure. A side of the support body away from the package material body is coplanar with the extension structure. An orthographic projection of the extension structure on the photosensitive surface is spaced apart from the photosensitive region.