Lens Driving Unit PCB-Coil Integration to Prevent Warping
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Solution Overview
Problem
Conventional camera modules face issues such as high manufacturing costs, increased height, and quality deterioration due to complex assembly processes, warping of printed circuit boards, contact failures, pad separation during soldering, irregular heights, external shock-induced cracks, and foreign substance introduction between circuit members and printed circuit boards.
Innovation Solution
A lens driving unit with a simplified design that includes a base, a housing, a magnet, a pattern coil part, and a sensor part, where the pattern coil part has stacked layers and a terminal portion, and a camera module with a printed circuit board and circuit member that are integrally formed to reduce elements, processes, and height, preventing warping, contact failures, and foreign substance introduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the printed circuit board and circuit member are assembled separately, then the circuit member can be disposed on the upper surface of the printed circuit board, but the circuit member may be slightly tilted and foreign substances may be introduced between them, deteriorating resolution
Solution Approach 1:
The circuit member and printed circuit board are integrally formed as a single structure, eliminating the assembly interface between them. This prevents tilting and foreign substance introduction, resolving the contradiction between ease of assembly and manufacturing precision.
2Ease of operation
If the printed circuit board and circuit member are assembled separately, then the circuit member can be disposed on the upper surface of the printed circuit board, but foreign substances may be introduced between them, deteriorating resolution
Solution Approach 1:
By integrating the circuit member and printed circuit board into a single structure, the invention eliminates the assembly interface where foreign substances could be introduced, thus preventing contamination while maintaining manufacturing feasibility.
3Adaptability or versatility
If conventional camera module elements are used, then the camera module can be assembled with multiple components, but the number of elements and manufacturing processes increases, raising price and height
Solution Approach 1:
The invention merges the printed circuit board and circuit member into a single integrated structure, reducing the number of discrete elements and assembly processes while maintaining all necessary functional capabilities of the camera module.
Solution Approach 2:
The integrated structure serves multiple functions simultaneously - it provides both the circuit board functionality and the circuit member functionality, eliminating the need for separate components and reducing overall device complexity.
4Ease of operation
If the printed circuit board and circuit member are assembled separately, then the circuit member can be disposed on the upper surface of the printed circuit board, but the assembly process becomes complex and time-consuming
Solution Approach 1:
By forming the circuit member and printed circuit board as a single integrated structure, the invention eliminates multiple assembly steps including positioning, alignment, and bonding operations, thereby significantly reducing manufacturing time and process 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
The solution reduces manufacturing costs, minimizes product height, and enhances camera module quality by preventing warping, contact failures, and external shock-induced damage, while ensuring even assembly and integration of components.
Implementation Method 1
a magnet located on the housing, a pattern coil part including a pattern coil that is located opposite the magnet
Data Source
AI summary
Embodiments provide a lens driving unit including a base, a housing supported so as to be movable relative to the base, a magnet located on the housing, a pattern coil part including a pattern coil that is located opposite the magnet, the pattern coil part being located on the base, and a sensor part mounted to the pattern coil part for sensing a position or movement of the housing, and the pattern coil part includes a first layer and a second layer stacked on the first layer, the sensor part being mounted underneath the first layer, and the pattern coil being formed on the second layer. Thereby, manufacturing costs may be reduced owing to a reduction in the number of elements, processes, and process management points.