Camera Module Guide Unit for Optical Axis Alignment
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Solution Overview
Problem
Camera modules face assembly issues due to non-concentric or tilted optical axes between image sensors and lens modules, leading to inaccurate alignment and poor assembly quality.
Innovation Solution
A camera module design featuring a holder member with a guide unit and mounting portion, including symmetric guide protrusions and a support surface, ensures precise alignment of the image sensor and lens module by facilitating concentric assembly through adhesive bonding or elastic interposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the image sensor and lens module are assembled without a guide unit, then the assembly process is simpler, but the optical axis alignment becomes inaccurate and tilted assembly occurs
Solution Approach 1:
The guide unit is pre-formed as an integral part of the holder member, providing preliminary alignment guidance before the actual assembly process. The guide protrusions are positioned in advance to guide the optical components into correct alignment, preventing misalignment during assembly rather than correcting it afterward.
Solution Approach 2:
The guide unit acts as an intermediary element between the holder member and the optical components (image sensor and lens module). The guide protrusions serve as mechanical mediators that transfer alignment information from the holder member to the optical components, ensuring concentric optical axis alignment without requiring complex external alignment tools or procedures.
2Manufacturing precision
If a guide unit with multiple guide protrusions is added to the holder member, then the assembly precision and optical axis alignment are improved, but the manufacturing complexity and number of parts increase
Solution Approach 1:
The guide unit is merged with the holder member as an integral structure, eliminating the need for separate guide components. The guide protrusions are formed directly on the holder member during the same manufacturing process, reducing the total part count and assembly steps while maintaining the alignment function.
Solution Approach 2:
The holder member is designed to serve multiple functions: it provides structural support, positions the image sensor and lens module, and simultaneously provides alignment guidance through its integrated guide unit. This multi-functionality eliminates the need for separate alignment fixtures or guide components, simplifying both manufacturing and assembly.
Data Source
AI summary
The camera module according to an embodiment of the present invention including: a printed circuit board on which an image sensor is mounted; a holder member installed on the printed circuit board; a lens module located in the holder member; and a guide unit formed protruding from the surface of the holder member opposite to the image sensor.