Camera Module Auto Focusing and Handshake Compensation
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Solution Overview
Problem
Existing camera modules in small electronic devices face challenges with handshake compensation due to increased manufacturing costs and complexity from separate angular velocity sensor installations, which hinder effective anti-handshake functionality.
Innovation Solution
A camera module design incorporating an auto focusing module with a magnet and coil system, coupled with a handshake compensation module using a coil block and magnet, and a flexible printed circuit board with elastic units to minimize size and enhance assembly, allowing for integrated auto focusing and handshake compensation without additional sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate angular velocity sensor is installed to achieve handshake compensation, then handshake compensation function is improved, but manufacturing cost and device complexity increase
Solution Approach 1:
The patent combines the handshake compensation function with the existing auto focusing module by integrating a coil block and magnet system into the same structural unit. This merging eliminates the need for a separate angular velocity sensor while achieving both auto focusing and handshake compensation functions through a unified module design.
Solution Approach 2:
The auto focusing module is designed to perform multiple functions: it serves as both the auto focusing mechanism and the handshake compensation mechanism. By making the module universal, the patent eliminates the need for dedicated separate components, thereby reducing device complexity while maintaining reliable handshake compensation.
2Reliability
If a separate angular velocity sensor is installed to achieve handshake compensation, then handshake compensation function is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges the handshake compensation function into the existing auto focusing module, eliminating the need to manufacture and install separate angular velocity sensors. This integration reduces manufacturing steps, component sourcing costs, and assembly complexity, thereby lowering overall manufacturing cost while maintaining effective handshake compensation.
Solution Approach 2:
By designing the auto focusing module to serve dual purposes (auto focusing and handshake compensation), the patent reduces the total bill of materials and manufacturing overhead associated with producing separate dedicated components, thus improving ease of manufacture while achieving reliable handshake compensation.
3Reliability
If the auto focusing module is tilted for handshake compensation, then handshake compensation is achieved, but erroneous tilting may occur
Solution Approach 1:
The patent introduces an asymmetric opening structure in the circuit board that is positioned to interfere with erroneous tilting directions while allowing correct tilting for handshake compensation. This asymmetric geometric constraint prevents the auto focusing module from tilting in wrong directions, thereby improving tilting operation accuracy while maintaining effective handshake compensation.
4Volume of moving object
If the camera module size is reduced for small electronic devices, then device compactness is improved, but space for anti-handshake components becomes limited
Solution Approach 1:
The patent merges the anti-handshake components (coil block and magnet) into the existing auto focusing module structure, eliminating the need for separate dedicated space for handshake compensation components. This integration allows effective anti-handshake function to be achieved within a compact camera module volume suitable for small electronic devices.
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 design enables effective handshake compensation and miniaturization of the camera module by using the auto focusing module to vertically move the lens and tilt for compensation, while preventing erroneous tilting and reducing assembly defects, thus enhancing the camera's performance and reducing size.
Implementation Method 1
a coil block arranged at a lateral wall of the housing, and a magnet opposite to the coil block and arranged at an external surface of the auto focusing module
Implementation Method 2
an auto focusing housing mounted with a magnet at a periphery, a bobbin arranged inside the auto focusing housing and mounted with a lens, a coil wound on a periphery of the bobbin, and an auto focusing magnet opposite to the coil and secured to the auto focusing housing
Implementation Method 3
a spring unit arranged about the body unit to elastically support the main circuit board
Data Source
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AI summary
The present invention relates to a camera module including an auto focusing module vertically moving a lens, a handshake compensation module wrapping the auto focusing module, and tilting the auto focusing module to compensate handshake, a circuit board electrically connected to the handshake compensation module, a bottom case supporting the circuit board and coupled to the auto focusing module, a main circuit board fixed to bottom case and electrically connected to an image sensor module and the circuit board, and a spring unit arranged at a periphery of the main circuit board and having a symmetrical opening having thereinside a gap spaced apart at a predetermined distance.