Tilted Reflective Camera Module for Precise Optical Stabilization
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Solution Overview
Problem
Conventional camera modules face challenges in providing effective optical image stabilization, particularly in maintaining precise mechanical alignment and stability during camera movement, which affects image quality.
Innovation Solution
The camera module incorporates a unique mechanical structure with a rotation holder, middle guide, and magnetic members, along with ball groups and guide grooves, to facilitate precise tilting and movement of optical components, ensuring stable image stabilization by maintaining close contact between ball members and guide grooves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional camera module structure is used, then the device is simple in structure, but the optical image stabilization precision and mechanical alignment stability are insufficient
Solution Approach 1:
The camera module is divided into multiple functional components: housing, rotation holder, middle guide, ball groups, and magnetic members. Each component has a specific function - the rotation holder accommodates the reflective member and tilts independently, the middle guide provides structural support and guidance, and the ball groups enable precise rotational movement. This segmentation allows for improved stabilization precision while managing complexity through functional specialization.
Solution Approach 2:
The patent implements dynamic stabilization by allowing the rotation holder to tilt about an axis perpendicular to the optical axis, enabling the reflective member to dynamically adjust its position to compensate for camera shake. The ball groups facilitate this dynamic movement while maintaining controlled engagement with the magnetic members for precise positioning.
2Ease of operation
If ball members are used for movement guidance, then smooth movement is achieved, but maintaining precise contact between ball members and guide grooves during rotation is challenging
Solution Approach 1:
The magnetic members act as intermediaries between the ball groups and the rotation holder. The magnetic attraction force maintains reliable contact between the ball members and guide grooves during rotation, ensuring that the ball groups can smoothly guide the movement while maintaining stable engagement. This magnetic mediation solves the problem of maintaining contact stability during dynamic rotation.
3Measurement precision
If the rotation holder tilts to correct light path, then image stabilization is improved, but mechanical alignment precision during tilting becomes critical
Solution Approach 1:
The patent designs the rotation holder to tilt about an axis perpendicular to the optical axis, creating a balanced rotational mechanism where the reflective member can move freely in the stabilization direction. The ball groups and magnetic members are positioned to provide uniform support and guidance during tilting, ensuring that mechanical alignment precision is maintained throughout the range of motion. This equipotential design allows the system to achieve image stabilization accuracy without requiring excessive manufacturing precision in individual components.
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 configuration enhances the optical image stabilization function by allowing smooth and precise movement of optical components, thereby improving image quality and reducing camera shake-induced image distortion.
Implementation Method 1
a first magnetic member disposed in the rotation holder... a second magnetic member disposed on the housing or the middle guide to face the first magnetic member
Data Source
AI summary
A camera module includes: a housing; a rotation holder configured to tilt about an axis perpendicular to an optical axis with respect to the housing, and accommodating a reflective member; a first magnetic member disposed in the rotation holder; a middle guide disposed between the housing and the rotation holder; and a first ball group including three ball members disposed between the rotation holder and the middle guide. An inner region of a triangle connecting the three ball members of the first ball group to one another and the first magnetic member overlap each other in a direction of the optical axis.