Image Sensor Suspension Structure for AF, OIS, and Tilt Correction

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Solution Overview

Problem

Existing camera devices require complex spring structures and multiple elastic members for lens barrel movement, leading to complicated assembly processes and difficulty in tilt correction, while existing technologies for auto-focus and optical image stabilization are limited in functionality and reliability.

Innovation Solution

A sensor driving device with a simplified spring structure that allows the image sensor to move relative to the lens barrel, enabling X-axis, Y-axis, and Z-axis movement, tilt correction, and both auto-focus and optical image stabilization functions through a system of substrates, coils, magnets, and elastic members.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the lens barrel is moved relative to the image sensor using multiple elastic members, then focus correction and shake compensation are achieved, but the module structure becomes complicated and assembly processes increase

Engineering Contradiction:

Improvefocus correction and shake compensationVSAvoidmodule structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Instead of moving the lens barrel relative to the image sensor as in conventional designs, this patent moves the image sensor relative to the lens barrel. The sensor moving part is suspended by elastic wires from the lens barrel, allowing the sensor to move for focus and shake compensation while the lens barrel remains stationary, thereby simplifying the overall module structure.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent combines multiple functions into a single integrated structure. The lens holder serves both as a mechanical support for the lens and as the fixed part from which elastic wires suspend the sensor moving part. This merging eliminates the need for separate complex spring structures and multiple elastic members that would otherwise be required.

Inventive Principle:

Principle #5Merging (Combining)

2Ease of operation

If multiple elastic members are used to move the lens barrel, then relative movement is achieved, but the number of assembly processes increases

Engineering Contradiction:

Improverelative movementVSAvoidassembly processes

Core Design Contradiction:

Ease of operationVSEase of manufacture

Solution Approach 1:

The patent extracts the movement function from the lens barrel and transfers it to the image sensor. By suspending only the sensor moving part with elastic wires from the lens holder, the design eliminates the need for multiple elastic members attached to the lens barrel, thereby reducing assembly complexity and the number of assembly processes.

Inventive Principle:

Principle #2Taking out (Extraction)

3Adaptability or versatility

If a complex spring structure is used for lens barrel movement, then auto-focus and optical image stabilization functions are provided, but tilt correction becomes difficult

Engineering Contradiction:

Improveauto-focus and optical image stabilizationVSAvoidspring structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

By inverting the conventional approach and moving the image sensor instead of the lens barrel, the patent enables tilt correction capability that is difficult to achieve with traditional lens barrel movement structures. The sensor moving part suspended by elastic wires can naturally accommodate tilt adjustments while maintaining auto-focus and optical image stabilization functions.

Inventive Principle:

Principle #13The other way round (Inversion)

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 solution simplifies the camera module structure, enhances stability and reliability by moving the image sensor instead of the lens barrel, supports improved auto-focus and optical image stabilization, and reduces assembly complexity, while allowing easy lens module replacement.

Implementation Method 1

a wire part disposed between the fixed part and the moving part... the wire part has one end connected to the first lead pattern part and the other end connected to the second-second lead pattern part to elastically support the moving part

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

the connection pattern part elastically connecting between the second-first lead pattern part and the second-second lead pattern part

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 3

a first coil part disposed on the first substrate... a magnet part disposed on the magnet holder and corresponding to the first coil part

Methodology Applied

Scientific EffectElectromagnetic force: Lorentz Force

Data Source

PatentUS12495211B2Sensor driving device capable of relative movements with respect to a lens barrel

Publication Date: 2025.12.09 LG INNOTEK CO LTD

AI summary

A sensor driving device according to an embodiment includes a fixed part; a moving part spaced apart from the fixed part; and a wire part disposed between the fixed part and the moving part, wherein the fixed part includes a first substrate including a first lead pattern part, wherein the moving part includes an elastic member including a second lead pattern part and a sensor disposed on the elastic member, wherein the second lead pattern part includes: a second-first lead pattern part connected to the sensor; a second-second lead pattern part connected to the wire part; and a connection pattern part elastically connecting between the second-first lead pattern part and the second-second lead pattern part; and wherein the wire part has one end connected to the first lead pattern part and the other end connected to the second-second lead pattern part to elastically support the moving part.