Glass Rib Retaining Structures for Optical Image Stabilizer
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Solution Overview
Problem
Existing optical image stabilizers in portable devices face challenges with electrical contacting and unwanted 'out of plane' movements due to the directional independence of printed circuit boards, leading to suboptimal stabilization and image quality.
Innovation Solution
The use of elastically deformable rib-shaped retaining structures made of glass with a cross-sectional shape optimized for directional dependency, allowing high flexibility in the movement plane and high stiffness transverse to it, integrated with conductor tracks and actuators for precise image sensor movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a printed circuit board is used to retain and move the image sensor, then electrical connections are maintained, but unwanted 'out of plane' movements occur due to directional independence
Solution Approach 1:
The patent applies local quality by creating retaining structures with directionally dependent mechanical properties. The rib-shaped glass structures have high flexibility in the movement plane (x-y directions) but high stiffness in the transverse direction (z-direction), achieving localized mechanical characteristics that prevent out-of-plane movements while allowing in-plane movement for image stabilization
Solution Approach 2:
The patent uses composite materials by integrating conductor tracks into the glass retaining structures. The glass provides the required mechanical properties (flexibility in-plane, stiffness out-of-plane) while the integrated conductor tracks maintain electrical connections, combining structural and electrical functions in a single composite component
2Adaptability or versatility
If the width of retaining structures in the movement plane is increased to allow movement, then flexibility improves, but out of plane movements increase
Solution Approach 1:
The patent applies asymmetry by designing rib-shaped retaining structures with different dimensional characteristics in different directions. The structures have a specific width in the movement plane that allows flexibility, while the height (transverse dimension) is optimized to provide stiffness against out-of-plane movements. This asymmetric dimensional design creates directionally dependent mechanical behavior
Solution Approach 2:
The retaining structures exhibit local quality through directionally dependent mechanical properties. The same structure provides high flexibility when forces are applied in the movement plane (x-y directions) but high stiffness when forces are applied in the transverse direction (z-direction), achieving contradictory mechanical requirements within a single component
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 solution enhances image capture by minimizing unwanted 'out of plane' movements, improving reaction speed and image quality, while maintaining reliable electrical connections and allowing for translational and rotational movements within the desired plane.
Implementation Method 1
The carrier is arranged so as to be movable with regard to a holder of the mobile device by elastic and/or flexible retaining structures
Implementation Method 2
the image sensor is arranged on the carrier so as to be movable relative to the holder by way of actuators
Data Source
AI summary
An optical image stabilizer for application in a mobile device equipped with a camera lens arrangement includes a carrier, elastic and/or flexible retaining structures that are rib-shaped, and an image sensor arranged on the carrier. The carrier is arranged so as to be movable with regard to a holder of the mobile device by the retaining structures, and is electrically connected by conductor tracks such that, for compensating for movements of the mobile device, the image sensor is arranged on the carrier so as to be movable relative to the holder by actuators. The retaining structures are at least in part elastically deformable and at least portions thereof consist of glass. At least some of the retaining structures have a width in a direction of a movement plane of the image sensor which is smaller than a material thickness in a direction transverse to the movement plane.