Camera Module with Flexible Circuit Substrate for Auto-Focusing
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Solution Overview
Problem
Conventional camera modules in mobile devices lack auto-focusing and hand-shaking correction functions, resulting in low-quality digital images due to inadequate adjustment capabilities and assembly difficulties.
Innovation Solution
A camera module design incorporating an auto-focusing module that adjusts the lens position, a hand-shaking correction module that tilts to stabilize the image, and a circuit substrate with oblong openings to enhance assembly and prevent tilt faults, along with a flexible printed circuit board for improved connectivity and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional camera module structure is used, then the device is simple in structure, but it lacks auto-focusing and hand-shaking correction functions resulting in low image quality
Solution Approach 1:
The patent implements nesting by placing the auto-focusing module inside the hand-shaking correction module, which is in turn mounted on the main circuit substrate. The lens is positioned within the auto-focusing module, creating a nested arrangement where smaller functional modules are integrated within larger structural frameworks, enabling multiple functions within a compact design
Solution Approach 2:
The patent combines multiple functions into an integrated camera module structure where the hand-shaking correction module and auto-focusing module work together as a unified system. The connection substrate merges electrical connections for both modules, and the mounting structure integrates mechanical support and alignment functions, achieving functional consolidation
2Reliability
If the main circuit substrate is rigid, then it provides stable electrical connection, but it causes tilt operation faults in the auto-focusing module
Solution Approach 1:
The patent employs a flexible connection substrate (FPC) instead of a rigid PCB for the main circuit substrate. This flexible substrate can bend and deform to accommodate the tilting motion of the auto-focusing module while maintaining electrical connectivity, eliminating the tilt operation faults that would occur with a rigid substrate
Solution Approach 2:
The connection substrate is designed to be dynamically flexible rather than statically rigid, allowing it to adapt its shape during auto-focusing operation. The flexible substrate can change its configuration to match the dynamic movements of the lens module, ensuring continuous reliable electrical connection throughout the range of motion
3Reliability
If the camera module lacks auto-focusing function, then the structure is simple, but it cannot adjust the gap between lens and image sensor resulting in poor image quality
Solution Approach 1:
The patent replaces manual mechanical focusing adjustment with an automated electromagnetic driving mechanism. The driving signal transmitted through the flexible connection substrate actuates the auto-focusing module, which uses electromagnetic forces to automatically adjust the lens position and gap, eliminating the need for manual mechanical intervention while achieving precise focusing control
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 camera module effectively improves auto-focusing and hand-shaking correction, ensuring higher image quality and ease of assembly by using a combination of magnetic and coil-based mechanisms with a flexible circuit substrate to stabilize the lens and prevent assembly errors.
Implementation Method 1
a coil and a magnet which generate an electromagnetic force for moving the bobbin
Implementation Method 2
coil blocks each arranged at a lateral wall of the housing, and a magnet formed opposite to the coil block and arranged at an external lateral surface of the auto focusing module
Data Source
AI summary
The present disclosure relates to a camera module including: an auto focusing module upping and downing a lens; a hand-shaking correction module wrapping the auto focusing module to correct a hand-shaking by horizontally tilting the auto focusing module; a circuit substrate electrically connected to the hand-shaking correction module and the auto focusing module; a bottom case supporting the circuit substrate to be coupled to the auto focusing module; and a main circuit substrate secured to the bottom case to be electrically connected to the image sensor module, wherein the main circuit substrate is formed with oblong symmetrical openings along an edge of the main circuit substrate.