Multi-Prism OIS Shaper Unit for Independent Axis Correction
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Solution Overview
Problem
Existing optical image stabilization (OIS) methods in camera modules, particularly the prism method, face challenges in achieving accurate correction for both X-axis and Y-axis movements due to the use of a single prism, which leads to reduced accuracy as corrections on one axis inevitably affect the other axis.
Innovation Solution
A camera module design that employs multiple prisms for independent OIS corrections on separate axes, with a control unit calculating correction values for each axis and individually controlling the prisms to perform OIS corrections independently on the X-axis, Y-axis, and potentially Z-axis, using a refractive prism and correction prisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single prism is used for OIS correction, then the structure remains simple, but the correction accuracy deteriorates because corrections on one axis affect the other axis
Solution Approach 1:
The single prism is divided into multiple independent prisms (first prism for X-axis correction, second prism for Y-axis correction). Each prism independently corrects optical paths in its designated axis direction, preventing cross-axis interference and improving correction accuracy while maintaining reasonable structural complexity
Solution Approach 2:
The correction system transitions from one-dimensional (single prism handling both axes) to two-dimensional independent control (separate prisms for X and Y axes). This dimensional separation allows each prism to operate independently in its specific axis without affecting the other, resolving the accuracy issue
2Measurement precision
If multiple prisms are used for independent axis corrections, then the OIS correction accuracy improves, but the device complexity increases
Solution Approach 1:
The correction function is segmented into multiple independent prisms, each responsible for a specific axis. This segmentation improves accuracy by eliminating cross-axis interference while the modular nature of separate prisms allows for organized integration, managing the increase in device complexity through systematic arrangement
Solution Approach 2:
Each prism serves a dual purpose: correcting optical path deviations in its specific axis while maintaining overall system compactness. The prisms are designed to work together as an integrated OIS system, where each component's simplicity contributes to the overall manageability of device complexity
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 design enhances the accuracy of OIS corrections by allowing each axis to be corrected without affecting the others, resulting in improved image stabilization performance.
Implementation Method 1
a refractive prism that changes a direction of incident light
Implementation Method 2
correction prisms disposed between the image sensor and the refractive lens and performing OIS correction
Data Source
AI summary
Provided are a shaper unit and an image stabilization device. A shaper unit, according to one aspect of the present invention, comprises: a shaper body formed of a transparent material; first glass disposed on one side of the shaper body; a membrane disposed on one side of the first glass; a variable prism disposed on one side of the membrane; and a second glass disposed on one side of the variable prism.