Tunable Prism OIS Assembly for Camera Module Position Stability

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Solution Overview

Problem

Camera modules with tunable prisms for optical image stabilization face issues with unintended movement due to liquid-filled membranes, leading to positional changes and instability.

Innovation Solution

A camera module design featuring an optical image stabilizer assembly with a moving part elastically restrained to a fixed part using a spring, incorporating a sealing member that accommodates liquid and is deformable, allowing precise control and stabilization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a membrane having liquid accommodated therein is used to connect moving part and fixed part in OIS assembly, then the OIS function can be provided by moving the prism, but the moving part may be unintentionally moved or position changed

Engineering Contradiction:

ImproveOIS functionVSAvoidposition stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The OIS assembly is divided into separate moving part and fixed part connected by elastic members, allowing independent control and stabilization of the moving part's position while maintaining the overall OIS function

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Elastic members (springs) are pre-installed to cushion and restrain the moving part, preventing unintended movement before it occurs, thereby ensuring position stability while maintaining OIS functionality

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 limits positional changes and enhances posture-dependent control, reducing errors and absorbing external impacts, thereby improving image stabilization precision and robustness.

Implementation Method 1

an elastic member that elastically connects the moving part to at least one of the camera housing or the fixed part

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

The sealing member accommodates a liquid therein and is deformable responsive to moving part rotation

Methodology Applied

Scientific EffectDeformation: Deformation

Data Source

PatentUS12149829B2Camera module with a camera housing, a lens assembly and an optical image stabilizer and electronic device including the same

Publication Date: 2024.11.19 GM CRUISE HOLDINGS LLC

AI summary

A camera module according to an embodiment of the disclosure includes a camera housing, a lens assembly, and an optical image stabilizer assembly, at least a portion of which is fixed to the camera housing, which changes a path of light travelling toward the lens assembly. The optical image stabilizer assembly includes a fixed part fixed to the camera housing and including a first light transmitting member, a moving part rotatable relative to the fixed part and including a second light transmitting member, a sealing member disposed between and connecting the first and second light transmitting members, and an elastic member that elastically connects the moving part to at least one of the camera housing or the fixed part. The sealing member accommodates a liquid therein and is deformable responsive to moving part rotation.