Camera Module Shielding Member for Electromagnetic Interference

Solution Overview

Problem

In camera modules of electronic devices, electromagnetic waves emitted from image sensors or electronic parts can interfere with normal operations, affecting image acquisition and degrading the performance of automatic focus and hand tremor cancellation functions.

Innovation Solution

A camera module with a shielding member disposed on the image sensor to shield electromagnetic waves emitted from or introduced to the image sensor, including a transparent shielding film and conductive materials to effectively block electromagnetic interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If camera module size is reduced, then miniaturization is achieved, but electromagnetic interference between electronic parts increases

Engineering Contradiction:

Improvecamera module sizeVSAvoidelectromagnetic interference

Core Design Contradiction:

Volume of moving objectVSObject-affected harmful factors

Solution Approach 1:

The image sensor is divided into a first area for image formation and a second area surrounding it. A shielding member is specifically disposed in the second area to shield electromagnetic waves, while the first area remains exposed to light for normal image capture. This segmentation allows targeted electromagnetic shielding without affecting the imaging function.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A shielding member is introduced as an intermediary element between the image sensor and surrounding electronic parts. The shielding member, disposed in the second area surrounding the image sensor, blocks electromagnetic waves emitted from electronic parts (such as autofocus actuators) from reaching the image sensor, thereby preventing electromagnetic interference while allowing the camera module to maintain a compact size.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If electronic parts are densely arranged, then miniaturization is achieved, but electromagnetic waves emitted from electronic parts interfere with image sensor operation

Engineering Contradiction:

Improveelectronic parts arrangement densityVSAvoidimage sensor operation

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The image sensor is divided into a first area for image formation and a second area surrounding it. A shielding member is specifically disposed in the second area to shield electromagnetic waves, while the first area remains exposed to light for normal image capture. This segmentation allows targeted electromagnetic shielding without affecting the imaging function.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of shielding the entire image sensor, the shielding member is selectively disposed only in the second area surrounding the image sensor. This local shielding approach provides electromagnetic protection where needed (around the sensor) while leaving the first area (image-forming area) open to light, thereby maintaining image quality while preventing electromagnetic interference.

Inventive Principle:

Principle #3Local quality

3Object-affected harmful factors

If shielding member is added, then electromagnetic interference is reduced, but device complexity increases

Engineering Contradiction:

Improveelectromagnetic interferenceVSAvoidcamera module structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The image sensor is divided into a first area for image formation and a second area surrounding it. A shielding member is specifically disposed in the second area to shield electromagnetic waves, while the first area remains exposed to light for normal image capture. This segmentation allows targeted electromagnetic shielding without affecting the imaging function.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of shielding the entire image sensor, the shielding member is selectively disposed only in the second area surrounding the image sensor. This local shielding approach provides electromagnetic protection where needed (around the sensor) while leaving the first area (image-forming area) open to light, thereby maintaining image quality while preventing electromagnetic interference.

Inventive Principle:

Principle #3Local quality

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

Improves image quality by preventing electromagnetic interference and maintaining the performance of electronic parts such as auto-focusing and hand tremor cancellation actuators.

Implementation Method 1

a shielding member disposed on the image sensor, corresponding to the second area, configured to shield electromagnetic waves emitted from the image sensor or an electronic part of the electronic device from being introduced to the image sensor

Methodology Applied

Scientific EffectElectromagnetic shielding: Faraday Cage

Data Source

PatentUS11245820B2Camera module and electronic device comprising same

Publication Date: 2022.02.08 SAMSUNG ELECTRONICS CO LTD

AI summary

A camera module provided in an electronic device according to various embodiments of the present invention may comprise an image sensor that comprises a first area which receives an external light and on which an image is formed and a second area which surrounds the first area; and a shielding member that is disposed on the image sensor, corresponds to the second area, and shields electromagnetic waves which are emitted from the image sensor or emitted from the electronic component of the electronic device and introduced into the image sensor. In addition to this embodiment, various embodiments are possible.