Camera Module Connector Shield Structure for Lower EMI Resistance
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Solution Overview
Problem
Existing camera modules face challenges in miniaturization and performance enhancement, particularly in reducing electrical resistance and blocking electromagnetic interference (EMI) noise, which are crucial for high-resolution and multifunctional camera applications in smartphones and mobile devices.
Innovation Solution
A camera module design featuring a lens moving unit, a connecting board, and a connector unit with a noise-blocking unit, a reinforcing member, and an adhesive, where the noise-blocking unit is strategically positioned to contact the ground layer and the reinforcing member, reducing electrical resistance and enhancing EMI noise blocking capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of lens elements is increased to improve optical performance, then image quality is improved, but the length of the optical axis increases
Solution Approach 1:
The patent applies parameter changes by using abnormal dispersion glass with specific refractive indices (nd1=20-40, nd2=20-40) and Abbe numbers (vd1=30-85, vd2=30-85) to reduce the optical axis length while maintaining image quality. The conditional expressions (1) through (6) define specific parameter ranges for lens curvature, thickness, and material properties to achieve compact design without sacrificing optical performance
Solution Approach 2:
The patent uses composite materials by combining different types of glass with specific optical properties. It employs abnormal dispersion glass for positive lenses and negative lenses with carefully selected refractive indices and Abbe numbers to create a composite lens system that reduces overall length while maintaining or improving image quality through material property optimization
2Illumination intensity
If the aperture is increased to improve light intake, then brightness is improved, but aberration control becomes more difficult
Solution Approach 1:
The patent applies local quality by assigning specific optical properties to different lens elements based on their position and function in the optical system. Each lens element (positive and negative) has tailored refractive indices, Abbe numbers, and curvature radii optimized for its local role in controlling aberrations while contributing to overall brightness
Solution Approach 2:
The patent uses parameter changes by defining specific ranges for curvature radii (r1, r2, r3, r4), thickness ratios (d1/f, d2/f), and material properties (refractive indices nd1, nd2; Abbe numbers vd1, vd2) to control aberrations effectively while maintaining large aperture for improved brightness
3Volume of moving object
If the camera module is made more compact, then device size is reduced, but assembly precision requirements increase
Solution Approach 1:
The patent applies parameter changes by optimizing the thickness ratios of lens elements (d1/f between 0.05-0.50, d2/f between 0.05-0.50) and curvature radii to achieve compact form factor. The conditional expressions define specific parameter ranges that balance compactness with manufacturability, ensuring assembly precision is maintained through controlled geometric parameters
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 effectively reduces electrical resistance between the reinforcing member and the ground, improving EMI noise blocking performance, thereby enhancing the camera module's functionality and RF sensitivity in portable devices.
Implementation Method 1
a noise-blocking unit (70) to block an electromagnetic interference (EMI) noise
Implementation Method 2
an adhesive (83), which joins the reinforcing member (85) and the noise-blocking unit (70), wherein a portion of the adhesive (83) is disposed in the cavity (31)
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
An embodiment comprises a lens driving part including a lens, a connection substrate connected to the lens driving part, and a connector part connected to the connection substrate. The connector part comprises a substrate including, on the upper surface thereof, a cavity and a ground layer, a noise shield part located within the cavity of the substrate and contacting the ground layer, and a reinforcement member located on the noise shield part. The reinforcement member is located in the cavity of the substrate and on the upper surface of the substrate. In a top view, the length of one side of the noise shield part is less than the length of one side of the cavity of the substrate.