Image Detecting Module Using Electromagnetic Actuation for Vibration Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image stabilizing technologies for cameras either reduce image quality by compensating for camera shake by moving the lens, or increase camera volume due to the need for large piezoelectric elements to move the image detecting unit.
Innovation Solution
An image detecting module with a base, a movable seat, and a system of coils and magnets that move the image detecting unit in two perpendicular directions, allowing for effective compensation of camera shake without adjusting the lens position, thus maintaining image quality and reducing camera size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lens is moved in a vertical optical axis to compensate for camera vibration, then image blur is suppressed, but the MTF value is reduced and image quality deteriorates
Solution Approach 1:
Instead of moving the lens to compensate for vibration, this patent moves the image detecting unit (CCD) in the opposite direction of the vibration. This inversion of the traditional approach allows blur compensation while maintaining the lens position and optical quality, thereby resolving the contradiction between stabilization effectiveness and image quality
Solution Approach 2:
The patent extends the motion compensation from one-dimensional (vertical axis only) to two-dimensional motion by adding a second guide element that allows the image detecting unit to move in both vertical and horizontal directions. This dimensional expansion provides more comprehensive vibration compensation while maintaining image quality
2Reliability
If piezoelectric elements are used to drive the image detecting unit, then blur compensation is achieved, but the camera volume increases due to large piezoelectric elements required
Solution Approach 1:
The patent replaces the mechanical piezoelectric actuation system with an electromagnetic driving system consisting of coils and magnets. This substitution enables the image detecting unit to be driven with smaller, more compact components, achieving the same stabilization function while reducing overall camera volume
Solution Approach 2:
The patent changes the driving mechanism from piezoelectric (voltage-driven dimensional change) to electromagnetic (current-driven magnetic force). This parameter change in the actuation method allows for more compact component design, reducing the volume required for the driving elements while maintaining effective image stabilization
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
Effectively compensates for camera shake by moving the image detecting unit relative to the optical axis, enhancing image quality and reducing camera volume compared to prior solutions.
Implementation Method 1
A magnetic force is generated between the first coil and the first magnet by providing a voltage to the first coil, thereby moving the seat in the first direction along the first guide element
Implementation Method 2
A magnetic force is generated between the second coil and the second magnet by providing a voltage to the second coil, thereby moving the movable plate in the second direction along the second guide element
Implementation Method 3
a first Hall element disposed on either the base or the seat and adjacent to the first coil
Data Source
AI summary
An image detecting module. The image detecting module comprises a base, a seat movably disposed on the base, an image detecting unit disposed on the seat, a first guide member by which the seat is joined to the base, moving relative to the base in a first direction, a first coil disposed on either the base or the seat, a first magnet disposed on either the base or the seat and opposite to the first coil, and a first Hall element disposed on either the base or the seat and adjacent to the first coil. A magnetic force is generated between the first coil and the first magnet by providing a voltage to the first coil, thereby moving the seat in the first direction along the first guide element.