Periscope Image Stabilization via Acoustic Wave Modulation
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Solution Overview
Problem
Existing image acquisition devices face challenges in achieving sufficient image stabilization while maintaining a slim design, as traditional Optical Image Stabilization (OIS) requires additional mechanical components and space for lens movement, and Electronic Image Stabilization (EIS) increases ISO sensitivity with limited effectiveness in preventing device shaking.
Innovation Solution
The design incorporates a Periscope-type structure with a reflection unit, a lens unit, a refraction unit, and drive units using electromagnetic forces to tilt and rotate components, allowing for efficient image stabilization in a compact form factor by minimizing the need for additional mechanical components and optimizing space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional Optical Image Stabilization (OIS) is used to prevent image blurriness caused by device shaking, then image stabilization performance is improved, but the device requires additional mechanical components and space for lens movement, increasing device complexity and reducing ease of manufacture
Solution Approach 1:
The patent replaces the traditional mechanical OIS system with an acoustic wave-based stabilization mechanism. Surface acoustic waves are generated on a substrate to modulate the optical path, eliminating the need for moving mechanical lens components while achieving image stabilization. This substitutes a mechanical system with an acoustic field-based system, reducing mechanical complexity.
Solution Approach 2:
The patent employs periodic surface acoustic waves with specific frequencies to modulate the optical properties of the substrate. By applying periodic acoustic vibrations, the system creates time-varying refractive index changes that stabilize the optical path against device shaking, replacing continuous mechanical adjustment with periodic acoustic action.
2Device complexity
If Electronic Image Stabilization (EIS) is used to minimize image blurriness by raising ISO sensitivity, then additional mechanical components are reduced, but image quality deteriorates due to high ISO noise and the device shaking cannot be fundamentally prevented
Solution Approach 1:
The patent replaces both traditional mechanical OIS and electronic EIS approaches with an acoustic wave-based stabilization system. Surface acoustic waves modulate the optical path physically without requiring high ISO settings, thereby eliminating electronic noise while avoiding the need for complex mechanical moving parts. This achieves fundamental stabilization rather than post-processing correction.
3Volume of moving object
If a Periscope-type structure with electromagnetic drive units is used to achieve image stabilization in compact form, then space requirement is reduced and device becomes slimmer, but the complexity of electromagnetic drive system increases
Solution Approach 1:
The patent replaces electromagnetic drive units with acoustic wave generation mechanisms. Instead of using electromagnetic forces to physically move components, the system generates surface acoustic waves on a substrate to achieve optical path modulation. This substitution eliminates the need for electromagnetic motors, coils, and associated control systems, reducing the complexity of the drive system while maintaining compact form factor.
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 enables effective image stabilization in a small space, reducing image degradation caused by device shaking while maintaining a slim design, by utilizing a Periscope-type structure with electromagnetic drive systems to adjust the optical path and refractive index, thereby stabilizing images effectively.
Implementation Method 1
The first drive unit may comprise a coil; a magnet configured to a line of a magnetic force which passes through the coil; and a power supply unit configured to apply an electric current to the coil.
Implementation Method 2
a refraction unit provided between the lens unit and the reflection unit and varying a refraction direction as one surface is pressed
Implementation Method 3
a reflection unit configured to reflect a light incident in a first direction toward a second which is perpendicular to the first direction
Data Source
AI summary
There is disclosed an image acquisition device comprising a reflection unit configured to reflect a light incident in a first direction toward a second which is perpendicular to the first direction; a lens unit comprising one or more lenses provided behind the reflection unit on an optical passage, the lens unit configured to form the optical passage in the second direction; a refraction unit provided between the lens unit and the reflection unit and varying a refraction direction as one surface is pressed; a pressing unit forming a pressing surface which contacts with one surface of the refraction unit; a first drive unit configured to tilt the pressing surface with respect to a first direction vertical axis; and a driver configured to drive the first drive unit in response to vibration.