Prism Device for Periscope Lens Image Stabilization

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Solution Overview

Problem

Existing periscope lens modules for mobile devices lack effective image stabilization mechanisms, particularly in adjusting the angle of the prism, which affects imaging quality and cost efficiency.

Innovation Solution

A prism device with a bearing frame, elastic member, driving member, and shape memory alloy wires that allows the prism to rotate relative to the bearing frame, enabling automatic angle correction and improving imaging quality while reducing weight and manufacturing costs by avoiding electromagnetic interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If electromagnetic driving mechanisms are used to adjust the prism angle, then the imaging quality and stabilization are improved, but the device weight increases and manufacturing cost rises due to electromagnetic interference requirements

Engineering Contradiction:

Improveimaging qualityVSAvoiddevice weight

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

The patent replaces electromagnetic driving mechanisms with a mechanical driving system consisting of a driving member connected to the supporting member. This mechanical substitution eliminates electromagnetic interference requirements, reduces device weight, and lowers manufacturing costs while maintaining the ability to adjust the prism angle for image stabilization.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent extracts and removes the electromagnetic driving components from the system, retaining only the essential mechanical elements needed for prism angle adjustment. This extraction eliminates the harmful electromagnetic interference and associated weight and cost penalties while preserving the core image stabilization function.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If electromagnetic driving mechanisms are used to adjust the prism angle, then the imaging quality and stabilization are improved, but the manufacturing cost increases due to electromagnetic interference requirements

Engineering Contradiction:

Improveimaging qualityVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of manufacture

If the prism angle adjustment mechanism is simplified to reduce cost, then manufacturing cost decreases, but the image stabilization capability is compromised

Engineering Contradiction:

Improvemanufacturing costVSAvoidimage stabilization capability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent implements a dynamic mechanical driving system where the driving member can actively adjust the supporting member's position, enabling real-time prism angle correction for image stabilization. This dynamic capability maintains image stabilization performance while using simpler, lower-cost mechanical components compared to electromagnetic systems.

Inventive Principle:

Principle #15Dynamics

4Manufacturing precision

If a complex mounting structure is used to precisely mount the prism, then the imaging precision is improved, but the device complexity increases

Engineering Contradiction:

Improveimaging precisionVSAvoidstructure complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent segments the mounting structure into distinct functional components: a bearing frame for support, an elastic member for positioning, and a driving member for adjustment. This segmentation allows each component to perform its specific function with simple geometry, reducing overall structural complexity while maintaining precise prism positioning and imaging quality.

Inventive Principle:

Principle #1Segmentation

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

The prism device enhances the imaging angle and quality of periscope lens modules by allowing precise angle adjustments, reducing electromagnetic interference, and lowering production costs through the use of shape memory alloy wires.

Implementation Method 1

The elastic member includes a first elastic frame and a second elastic frame. The supporting member is rotatably mounted to the bearing frame through the elastic member.

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

A prism device with a bearing frame, elastic member, driving member, and shape memory alloy wires that allows the prism to rotate relative to the bearing frame

Methodology Applied

Scientific EffectShape memory alloy: Shape Memory Alloy

Data Source

PatentUS11428921B2Prism device applied to periscope lens module and periscope lens module

Publication Date: 2022.08.30 AAC OPTICS SOLUTIONS PTE LTD

AI summary

Provided is a prism device applied to a periscope lens module. The prism device includes: a bearing frame; an elastic member including first and second elastic frames; a driving member; a supporting member including a relying portion and rotatably mounted to the bearing frame through the elastic member; and a prism. The driving member drives the supporting member and the prism to rotate relative to the bearing frame. The first and second elastic frames include a first clamping portion and a second clamping portion, respectively, and the first clamping portion and the second clamping portion clamp the relying portion from two opposite sides thereof in such a manner that the supporting member is rotatable about the relying portion. Therefore, when the driving member is driven by the driving member, the prism can be driven to rotate relative to the bearing frame, thereby automatically correcting an angle of the prism.