Piezoelectric Optical Image Stabilizer with Curved Tip
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Solution Overview
Problem
Existing optical image stabilizers for camera lens modules in small and lightweight devices, such as digital cameras and mobile terminals, face challenges in miniaturization and high manufacturing costs due to spatial constraints and power consumption, limiting their effectiveness in correcting image blurring caused by hand movement.
Innovation Solution
An optical image stabilizer with a simple structure, utilizing piezoelectric actuators and a magnetic attraction system to freely move an image sensor assembly within a plane perpendicular to the photographing direction, allowing for two-directional movement and rotation, thereby correcting image blurring without the need for separate mechanical structures or high-power drives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate mechanical drive is installed for optical image stabilization, then the correction rate is maintained at over 90%, but the manufacturing cost increases and installation space requirements increase
Solution Approach 1:
The patent merges the drive mechanism with the image sensor assembly housing, eliminating the need for a separate mechanical drive installation. The drive is integrated directly into the housing structure, reducing overall installation space while maintaining the correction rate capability.
Solution Approach 2:
The housing structure serves multiple functions: it houses the image sensor assembly, provides mounting for the piezoelectric actuator, and acts as part of the drive mechanism itself. This multi-functionality reduces the need for separate components and reduces installation space requirements.
2Reliability
If a separate mechanical drive is installed for optical image stabilization, then the correction rate is maintained at over 90%, but the manufacturing cost increases
Solution Approach 1:
By combining the drive mechanism with the existing housing structure, the patent reduces the total number of separate components that need to be manufactured and assembled. This integration simplifies the manufacturing process and reduces overall manufacturing costs while maintaining correction rate performance.
Solution Approach 2:
The patent employs piezoelectric actuators which are relatively inexpensive compared to traditional mechanical drives. These actuators provide sufficient correction capability at a lower cost, making the overall system more economical to manufacture.
3Reliability
If a driving device is installed in portable photographing devices with rechargeable batteries, then image stabilization is achieved, but power consumption increases
Solution Approach 1:
The patent replaces traditional mechanical drive systems with piezoelectric actuators that use electrical fields to generate mechanical motion. This substitution enables more efficient power usage, as piezoelectric materials can respond quickly to electrical signals with minimal energy consumption, suitable for portable devices with rechargeable batteries.
4Device complexity
If Digital Image Stabilization is used instead of Optical Image Stabilization, then the device structure is simplified and cost is reduced, but the correction rate decreases and photographing rate is reduced
Solution Approach 1:
The patent uses piezoelectric actuators that combine mechanical precision with electrical control, achieving optical image stabilization without requiring complex mechanical drive systems. This approach provides high correction rates (over 90%) while keeping the structure relatively simple and cost-effective, bridging the gap between electronic and optical stabilization methods.
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
Enables sharp image capture in vibrating devices by simplifying the structure and reducing power consumption, facilitating installation in compact devices while maintaining high correction rates, thus overcoming the limitations of previous technologies.
Implementation Method 1
at least one piezoelectric actuator fixed to the housing, and if the piezoelectric actuator is driven, the image sensor assembly freely moves
Implementation Method 2
at least one magnetic substance mounted on the housing, and the magnetic substance may provide magnetic attraction to draw the heat sink against the housing
Data Source
AI summary
An optical image stabilizer for a camera lens module, including a housing fixed to a case of the camera lens module, at least one piezoelectric actuator fixed to the housing, and an image sensor assembly housed in the housing. A driving tip of the piezoelectric actuator is curved in shape and makes a point contact with the image sensor assembly. If the piezoelectric actuator is driven, the image sensor assembly freely moves on a plane perpendicular to a photographing direction as the driving tip rubs against the image sensor assembly. This optical image stabilizer is simple in structure and easy to control, so it can be mounted in devices in which installation spaces are limited, like small digital cameras and mobile terminals.