Dual-Bobbin Lens Drive Layout to Prevent Camera Module Interference
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Solution Overview
Problem
Interference between driving apparatuses in camera modules poses a challenge, affecting the performance of auto focus, image stabilization, and zoom functions.
Innovation Solution
A lens driving device comprising a base with a hole, first and second bobbins, coils on the bobbins, a driving magnet, and flexible printed circuit boards (FPCBs) connected to the coils, which are designed to prevent interference by guiding the movement of the bobbins and limiting electromagnetic interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple driving apparatuses are equipped in a camera module to enable auto focus, image stabilization, and zoom functions, then the functionality and versatility of the camera module is improved, but interference occurs between the driving apparatuses affecting their operational reliability
Solution Approach 1:
The patent divides the camera module into separate driving apparatuses (first and second driving apparatuses) with distinct bobbins, coils, and magnets. Each driving apparatus is independently structured with its own bobbin-coil-magnet assembly, allowing them to operate separately without interfering with each other. This segmentation enables multiple functions (auto focus, image stabilization, zoom) to coexist without mutual interference.
2Device complexity
If multiple driving apparatuses are integrated in a compact camera module, then the device complexity is reduced and space is saved, but interference between driving apparatuses occurs
Solution Approach 1:
The patent arranges the first and second driving apparatuses in different spatial dimensions and orientations within the camera module. The bobbins are positioned at different locations and angles, with their respective coils and magnets oriented to produce electromagnetic forces in different directions. This dimensional separation allows compact integration while preventing electromagnetic interference between the driving apparatuses.
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 prevents interference between driving apparatuses, ensuring stable operation of auto focus, image stabilization, and zoom functions in camera modules.
Implementation Method 1
a coil disposed on the bobbin; a driving magnet fixed to the base and facing the coil
Data Source
AI summary
A lens driving apparatus and a camera module comprising same are provided. A lens driving apparatus according to an aspect of the present invention comprises: a base including a hole; a first bobbin arranged in the base; a second bobbin arranged in the base and spaced apart from the first bobbin; a first coil arranged on the first bobbin; a second coil arranged on the second bobbin; a driving magnet fixed to the base and facing the first and second coils; a first flexible printed circuit board (FPCB) having one end electrically connected to the first coil and the other end passing through the hole in the base; and a second FPCB having one end electrically connected to the second coil and the other end passing through the hole in the base.