Image Sensor OIS Structure for Heavy-Lens Camera Stabilization
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Solution Overview
Problem
The increasing pixelation of camera lenses has led to larger diameters and increased weight, making it difficult to secure electromagnetic forces to move the lens within a limited space for effective image stabilization, particularly in high-pixelation camera devices.
Innovation Solution
A camera device design that moves the image sensor in three axes (x-axis shift, y-axis shift, and z-axis roll) using an OIS drive unit with wires of varying diameters and incorporating a damper to improve wire buckling resistance and reduce current heating, allowing for higher current supply to the power circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the lens diameter is increased to improve image quality with high pixelation, then the image quality is improved, but the weight of the lens increases and it becomes difficult to secure electromagnetic force to move the lens within limited space
Solution Approach 1:
Instead of moving the heavy lens for image stabilization, the patent inverts the approach by moving the image sensor while keeping the lens stationary. This allows the lighter sensor to be moved using electromagnetic forces, resolving the contradiction between maintaining high pixelation image quality and enabling effective image stabilization.
Solution Approach 2:
The patent separates the lens and image sensor into independent movable components. The lens remains fixed while the image sensor is moved separately for stabilization, allowing each component to be optimized independently - the lens for image quality and the sensor assembly for ease of movement and stabilization.
2Temperature
If wires with larger diameter are used to reduce current heating, then current heating is reduced, but the device complexity increases due to varying wire diameters and damper incorporation
Solution Approach 1:
The patent applies different wire diameters locally based on specific requirements - larger diameter wires are used in positions where current heating is a concern, while smaller wires are used elsewhere. This localized differentiation reduces overall heating while avoiding the complexity of uniformly increasing all wire diameters.
Solution Approach 2:
The patent changes the physical parameter of wire diameter at different locations to optimize current distribution and reduce heating. By varying the wire diameter parameter locally rather than uniformly, the system achieves better thermal management without proportionally increasing overall device complexity.
3Reliability
If the image sensor is moved in three axes for OIS, then the image stabilization performance is improved, but the device complexity increases due to the multi-axis movement mechanism
Solution Approach 1:
The patent combines multiple movement functions (x-axis shift, y-axis shift, and z-axis roll) into a single integrated OIS drive unit that moves the image sensor. This merging of multiple stabilization functions into one mechanism achieves comprehensive three-axis stabilization while reducing the complexity that would result from separate mechanisms for each axis.
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 enhances image stabilization by improving wire deformation resistance and reducing current heating, ensuring reliable operation and efficient power supply to the image sensor.
Implementation Method 1
a damper is disposed on the some of the plurality of wires
Implementation Method 2
an OIS drive unit configured to move the image sensor relative to the lens in a direction perpendicular to an optical axis direction
Data Source
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AI summary
An embodiment of the present invention relates to a camera device comprising: a lens; an image sensor disposed under the lens; and an OIS drive unit for moving the image sensor relative to the lens in a direction perpendicular to the optical axis direction; and a plurality of wires electrically connected to the image sensor, wherein some of the plurality of wires have a larger diameter than the other wires.