Sensor-Shift OIS Camera Wiring for Higher Current Stability
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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 sufficient electromagnetic force to move the lens for image stabilization within a limited space.
Innovation Solution
The camera device moves the image sensor in three axes (x-axis shift, y-axis shift, and z-axis roll) using an OIS drive unit, with some wires having a larger diameter than others, and optionally includes dampers on specific wires to improve reliability and reduce current heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the lens diameter is increased to improve pixelation, then the image quality is improved, but the weight of the lens increases and it becomes difficult to secure sufficient electromagnetic force for image stabilization
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 resolves the contradiction by eliminating the need to generate electromagnetic force to move the heavy lens, while still achieving image stabilization through sensor movement.
Solution Approach 2:
The patent replaces the mechanical/electromagnetic lens-driven stabilization system with a sensor-driven system. By using an image sensor that can be moved independently, the system substitutes the heavy mechanical lens movement with lighter sensor movement, reducing the electromagnetic force requirements.
2Measurement precision
If the lens diameter is increased to improve pixelation, then the image quality is improved, but the space required for electromagnetic components is exceeded
Solution Approach 1:
The patent inverts the stabilization mechanism by moving the image sensor instead of the lens. This eliminates the need for large electromagnetic components around the lens, reducing the volume required for electromagnetic stabilization components while maintaining image quality.
3Reliability
If higher current is supplied to improve OIS performance, then the image stabilization is improved, but the temperature increases and reliability decreases
Solution Approach 1:
The patent applies local quality by using wires of different diameters in different locations. Thicker wires are used in regions where higher current is required for OIS operation, while thinner wires are used where less current is needed. This local differentiation allows higher current supply where necessary without uniformly increasing temperature across all wires, maintaining reliability while improving OIS 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 configuration enhances the image stabilization function by improving wire deformation resistance and allowing higher current supply, thereby securing reliability and reducing temperature, while maintaining efficient image stabilization.
Implementation Method 1
it is difficult to secure an electromagnetic force to move the lens within a limited space
Implementation Method 2
The camera device may comprise a damper disposed on some of the plurality of wires
Data Source
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.