Image Sensor Actuation Layout for OIS, AF, and Tilt Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing camera modules require complex spring structures and multiple elastic members for lens barrel movement, leading to increased assembly steps and difficulty in tilt correction, while existing technologies fail to efficiently move the image sensor relative to the lens barrel for optical image stabilization and auto focus functions.
Innovation Solution
A camera module design that moves the image sensor relative to the lens barrel using a substrate with integrated driving parts, including permanent magnets and coils, allowing for movement in X, Y, and Z axes, as well as tilt correction, without the need for complex spring structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple elastic members and complex spring structures are used to move the lens barrel for focus compensation and shake compensation, then the camera device can achieve focus adjustment and stabilization functions, but the module structure becomes complicated and the number of assembling steps increases
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 image sensor is mounted on a moving plate that can be displaced by electromagnetic driving parts, inverting the traditional approach to achieve focus compensation and shake compensation with a simpler structure.
Solution Approach 2:
The patent replaces the mechanical spring-based elastic members with an electromagnetic driving system. Electromagnetic driving parts consisting of coils and magnets are used to move the image sensor, eliminating the need for complex spring structures and reducing the number of assembling steps while maintaining the required compensation functions.
2Reliability
If multiple elastic members are used to move the lens barrel, then focus compensation and shake compensation can be achieved, but the number of assembling steps increases
Solution Approach 1:
The patent combines multiple compensation functions (focus compensation and shake compensation) into a single integrated system. The image sensor is mounted on a moving plate that can perform both X-Y axis movements for shake compensation and Z-axis movement for focus compensation, eliminating the need for separate elastic members for each function and reducing assembly steps.
Solution Approach 2:
The electromagnetic driving system replaces multiple mechanical elastic members, reducing the number of components that need to be assembled. The driving parts can be directly mounted on the moving plate and controlled electronically, streamlining the assembly process compared to traditional mechanical spring-based systems.
3Reliability
If the lens barrel is moved for focus compensation and shake compensation, then image stabilization can be achieved, but tilt correction becomes difficult
Solution Approach 1:
The patent employs a dynamic moving plate structure that can move in multiple directions (X, Y, and Z axes) and also perform tilting movements. This dynamic capability allows the image sensor to be positioned and oriented precisely, achieving both image stabilization and tilt correction functions simultaneously through electromagnetic actuation.
Solution Approach 2:
The moving plate serves multiple functions: it moves the image sensor in X and Y directions for shake compensation, moves in the Z direction for focus compensation, and performs tilting movements for tilt correction. This multi-functional design eliminates the need for separate mechanisms for each function.
4Ease of manufacture
If elastic members are bonded to the lens barrel by bonding, then the lens barrel can be moved, but the structure becomes more complex
Solution Approach 1:
The patent replaces the mechanical bonding of elastic members to the lens barrel with an electromagnetic coupling system. The electromagnetic driving parts use magnetic fields to move the image sensor without requiring physical bonding of multiple elastic members to the lens barrel, simplifying the overall structure and manufacturing process.
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 design simplifies the module structure, reduces assembly complexity, and enhances stability and mobility of the image sensor, minimizing noise and electrical reliability issues while providing effective optical image stabilization and auto focus functions.
Implementation Method 1
the first driving part includes: a first driving part of a first group configured to move the image sensor substrate in a first direction with respect to the lens barrel; and a second driving part of a second group configured to move the image sensor substrate in a second direction intersecting the first direction
Implementation Method 2
an elastic member extending in a first direction, the second connector part having a second open region exposing the elastic member in the first direction
Data Source
AI summary
A camera module includes a first driving part on a lower surface of an image sensor substrate, and a second driving part on a lower surface of the housing to face a lower surface of the first driving part. The first driving part includes a first driving part of a first group configured to move the image sensor substrate in a first direction with respect to the lens barrel, and a second driving part of a second group configured to move the image sensor substrate in a second direction intersecting the first direction with respect to the lens barrel. The second driving part includes a second driving part of a first group disposed overlapping the first driving part of the first group in a vertical direction, and a second driving part of a second group disposed overlapping the first driving part of the second group in the vertical direction.