Camera Module Alignment Using Instantaneous Curing Adhesive
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Solution Overview
Problem
Camera modules, especially those in portable devices and vehicles, face deteriorated picture quality due to reduced pixels and miniaturization, and require precise optical axis alignment for optimal image characteristics, especially with features like automatic parking and around view monitoring.
Innovation Solution
A camera module manufacturing apparatus that aligns the optical axis of a lens with the image sensor using an instantaneous curing adhesive, including a chart unit for alignment, a substrate alignment unit, an optical axis alignment unit, and a camera module fixing unit, which applies the adhesive between the lens and substrate assembly to secure the lens assembly on the substrate assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an instantaneous curing adhesive is used to fix the lens assembly on the substrate assembly, then productivity is improved due to rapid curing, but manufacturing precision may deteriorate due to potential misalignment during the brief curing period
Solution Approach 1:
The chart unit displays alignment patterns before adhesive application, allowing the lens assembly and substrate assembly to be precisely aligned in advance. The alignment unit uses these patterns to adjust positions, ensuring optical axis alignment is achieved before the instantaneous curing adhesive sets, thus preventing misalignment during curing.
2Volume of moving object
If the lens assembly is miniaturized to fit portable devices, then device size is reduced, but manufacturing precision deteriorates due to tighter tolerances and increased sensitivity to alignment errors
Solution Approach 1:
The alignment unit replaces manual mechanical alignment with an automated system that uses chart patterns and sensing mechanisms to precisely position the lens assembly relative to the substrate assembly. This automated alignment system achieves higher precision than manual methods, which is critical for miniaturized camera modules with tight tolerances.
3Manufacturing precision
If the camera module is assembled with high precision alignment, then image quality is improved, but productivity deteriorates due to time-consuming alignment procedures
Solution Approach 1:
The chart unit provides self-aligning patterns that automatically guide the alignment process. When the lens assembly is positioned over the chart unit, the alignment marks and patterns provide visual feedback that enables rapid self-correction of alignment, eliminating the need for complex measurement and adjustment procedures while maintaining high precision.
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 approach maximizes productivity by minimizing optical axis distortion and ensuring optimal image characteristics, allowing for precise alignment and fixing of the camera module without altering existing equipment structures.
Implementation Method 1
fixing the lens assembly on the substrate assembly by applying an instantaneous curing adhesive, which is an inorganic material
Data Source
AI summary
A camera module manufacturing apparatus includes: a chart unit configured to provide an image for optical-axis alignment to a substrate assembly including an image sensor; a substrate alignment unit disposed opposite to the chart unit, aligning the substrate assembly, and electrically connected to the image sensor; an optical axis alignment unit configured to allow an optical axis of a lens assembly including a lens and an actuator to be aligned with respect to an optical axis of the image sensor; and a camera module fixing unit positioned adjacent to the optical axis alignment unit, and fixing the lens assembly on the substrate assembly by applying an instantaneous curing adhesive, which is an inorganic material, to the lens assembly and the substrate assembly which are aligned.