Lens Drive Structure With Split AF and OIS for Higher Yield
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Solution Overview
Problem
Existing lens driving devices suffer from low manufacturing success rates and poor image stabilization performance due to the integration of auto focusing and optical image stabilization structures, which are often damaged during manufacturing, leading to increased costs and reduced performance.
Innovation Solution
The lens driving device is designed with auto focusing and optical image stabilization structures as two independent devices, each with separate components and processing, allowing for improved manufacturing yield and enhanced image stabilization through the use of different types of balls and magnetic conductors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the auto focusing structure and optical image stabilization structure are integrated in the same device, then the device can achieve both focusing and image stabilization functions, but the manufacturing success rate decreases and manufacturing cost increases due to potential damage during manufacturing
Solution Approach 1:
The patent divides the lens driving device into two independent modules: a first lens driving device for auto focusing and a second lens driving device for optical image stabilization. Each module has separate magnets, coils, and stabilization balls, eliminating the damage risk associated with integrated structures during manufacturing while maintaining both functions.
2Device complexity
If only one kind of stabilization ball is used, then the device structure is simplified, but the image stabilization performance becomes poor
Solution Approach 1:
The patent employs different types of stabilization balls in different locations: a first stabilization ball in the first lens driving device and a second stabilization ball in the second lens driving device. This local differentiation allows each ball to be optimized for its specific function, with the first ball dedicated to focusing stability and the second ball dedicated to image stabilization, thereby enhancing overall performance.
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
This design reduces manufacturing costs and improves image stabilization performance by ensuring independent processing and assembly of focusing and stabilization structures, enhancing the stability and reliability of the lens driving device.
Implementation Method 1
an attractive force is generated between the first magnetic conductor and the first magnet to cause the first bracket and the first shell to clamp the first ball
Implementation Method 2
the first magnet drives the first coil to drive the first bracket and the imaging sensor to move in a plane perpendicular to the optical axis when the first coil is energized
Implementation Method 3
an attractive force is generated between the second magnetic conductor and the second magnet to cause the second bracket and the support bracket to clamp the ball set
Implementation Method 4
the second magnet drives the second coil to drive the support bracket and the lens to move along the direction of the optical axis when the second coil is energized
Data Source
AI summary
A lens driving device and an optical apparatus. An attractive force between the first magnetic conductor and the first magnet causes the first bracket and the first shell to clamp the first ball, the first magnet drives a first coil to drive the first bracket and an imaging sensor to move in a plane perpendicular to an optical axis, and a first position detection element is configured to detect a position of the first magnet. An attractive force between the second magnetic conductor and the second magnet causes the second bracket and the support bracket to clamp the ball set, the second magnet drives a second coil to drive a support bracket and a lens to move along the optical axis, and a second position detection element is configured to detect a position of the second magnet. The yield loss in the manufacturing process is reduced.