Lens Driving Device with Image Stabilizer Function
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Solution Overview
Problem
Existing lens driving devices with image stabilizer functions require complex control methods and additional components to correct off-centering due to the deformation of suspension wires under gravity, leading to increased size, cost, and power consumption.
Innovation Solution
A lens driving device with a lightweight swing part, utilizing a configuration of first and second coils, permanent magnets, and spring components that allows the lens carrier to swing efficiently without the need for off-centering correction, supported by second spring components with high spring coefficients, eliminating the need for position detecting mechanisms and offset correcting control circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the lens driving device is suspended supported by four suspension electric wires, then the lens driving device can swing in X direction and Y direction for image stabilization, but the suspension electric wires are bent and deformed through gravity action when camera posture changes, causing the lens center to be biased and image distortion to occur
Solution Approach 1:
The patent extracts the harmful gravitational effect on the suspension system by removing the heavy permanent magnet from the swing part. This eliminates the root cause of wire deformation and lens off-centering, allowing the simplified suspension structure to maintain both image stabilization capability and lens centering precision without requiring complex correction mechanisms.
Solution Approach 2:
The patent applies the anti-weight principle by relocating the mass compensation function to the base structure rather than including it in the swing part. The base structure provides counterbalancing support that compensates for gravitational effects on the suspension wires, preventing lens off-centering while maintaining the ability to swing for image stabilization.
2Manufacturing precision
If a position detecting mechanism and offset correcting control circuit are added to correct lens off-centering, then image distortion is corrected, but the device size increases, cost increases, and power consumption increases
Solution Approach 1:
The patent extracts and removes the complex correction system (position detecting mechanism and offset correcting control circuit) by preventing the problem at its source. Through structural design that eliminates lens off-centering, the patent achieves lens centering precision without requiring additional detecting or correcting components, thereby reducing device complexity.
Solution Approach 2:
The patent applies self-service by designing a suspension structure that automatically maintains lens centering without requiring external detection or correction systems. The structural design itself provides the centering function, making additional correction mechanisms unnecessary and reducing overall device complexity.
3Manufacturing precision
If a position detecting mechanism and offset correcting control circuit are added to correct lens off-centering, then image distortion is corrected, but power consumption increases due to additional control circuits
Solution Approach 1:
The patent extracts and eliminates the power-consuming position detecting mechanism and offset correcting control circuit by preventing lens off-centering through structural design. This achieves lens centering precision without requiring additional electrical components, thereby reducing power consumption.
Solution Approach 2:
The patent applies self-service by designing a suspension structure that automatically maintains lens centering without requiring external electrical detection or correction systems. The structural design itself provides the centering function, eliminating the need for power-consuming correction circuits.
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 enables miniaturization, reduces power consumption, and lowers costs by maintaining image stabilization without the need for additional components, while minimizing flexural deformation and lens off-centering even when the camera posture changes.
Implementation Method 1
When the coils 612a and 612b are electrified, the Lorentz force in the Y direction and the X direction is generated in the coils 612a and 612b for image stabilizing
Implementation Method 2
an upper side plate spring 606 and a lower side plate spring 607 which extend along a direction perpendicular to the Z direction
Data Source
AI summary
The present invention provides a lens driving device with image stabilizer function with high driving efficiency of second coils for swinging the lens, and the swing part is light. A lens support accommodating the first coil wound around the Z axis, and a base are respectively connected with first spring components extending along the direction perpendicular to the Z direction. The second coils are wound around the X direction and the Y direction and configured on the outer side of the first coil. A lens carrier and a carrier bracket provided with the second coils are connected with the second spring component extending along the Z direction. The second spring component is supported by the lens carrier and can swing in the X direction and the Y direction.