Camera Image Sensor Mounting on Metal Plate to Prevent PCB Distortion
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Solution Overview
Problem
The assembly of high-resolution camera apparatuses is hindered by distortion of the printed circuit board, leading to misalignment of the image sensor and lens, resulting in optical axis distortion, increased production costs, and reduced productivity due to tilting and resolution defects.
Innovation Solution
A camera apparatus design that mounts the image sensor on a metal plate with a flat surface, supported by a printed circuit board, and a lens assembly that is aligned to coincide with the image sensor's optical axis, using through-holes and depressed portions to secure the housing, thereby minimizing distortion and ensuring precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the image sensor is mounted on a printed circuit board, then the assembly process is simplified, but distortion of the printed circuit board causes misalignment of the image sensor and lens, resulting in optical axis distortion
Solution Approach 1:
A metal plate with a flat surface is introduced as an intermediary between the printed circuit board and the image sensor. The metal plate serves as a stable mounting substrate that prevents distortion, while the printed circuit board remains connected for electrical functionality. This mediator resolves the contradiction by providing both ease of assembly (through the flexible PCB connection) and manufacturing precision (through the rigid flat mounting surface).
Solution Approach 2:
The mounting structure is segmented into three distinct components: the printed circuit board for electrical connection, the metal plate for mechanical support and flatness, and the image sensor for imaging. This segmentation allows each component to fulfill its specific function without compromising the others, enabling both easy assembly and high alignment precision.
2Adaptability or versatility
If the image sensor and lens are assembled separately and then coupled, then manufacturing flexibility is improved, but tilting and distortion occur during assembly, reducing productivity and increasing costs
Solution Approach 1:
The image sensor is preliminarily mounted on the flat metal plate surface before final assembly with the lens module. This preliminary action ensures proper positioning and alignment are established early in the manufacturing process, preventing tilting issues during subsequent coupling steps. The flat metal plate provides a stable base that maintains alignment throughout the assembly process.
3Length of moving object
If the printed circuit board is made thin to reduce device size, then device compactness is improved, but the board becomes more prone to distortion and deformation
Solution Approach 1:
The mounting structure uses a composite arrangement combining a thin printed circuit board with a rigid metal plate. The thin PCB maintains device compactness, while the metal plate provides structural stability and prevents distortion. This composite structure allows the overall device to remain thin while the critical imaging components are mounted on a stable, non-distorting surface.
Data Source
AI summary
An electronic device is provided that includes a first cover defining one surface, a second cover defining an opposite surface, and a camera assembly of which at least a portion is arranged in a space between the first cover and the second cover. The camera assembly includes a metal plate arranged substantially parallel to the first cover, a printed circuit board arranged between the first cover and the metal plate, the printed circuit board having an opening arranged substantially at a center, and at least one through-hole arranged outside the opening, an image sensor arranged in the opening and attached to the metal plate, a lens assembly arranged adjacent to the image sensor, and a side surface that surrounds at least a portion of the image sensor and the lens assembly. At least a portion of the side surface passes through the through-hole to be connected to the metal plate.