Camera Module Unitary Element with Reverse Inclined Structure
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Solution Overview
Problem
The existing camera modules in portable electronic devices face challenges in achieving high optical quality and precision in manufacturing and assembly, leading to issues with stray light and image quality.
Innovation Solution
A camera module design incorporating a unitary element with a reverse inclined structure and a driving member using magnets and coils, which includes a lens carrier and lens barrel forming a containing space with annular concave structures to prevent stray light and improve image quality, along with a fixed member and driving mechanism for autofocus and image stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a traditional lens assembly structure is used, then the manufacturing and assembly process is simpler, but stray light cannot be effectively prevented and image quality deteriorates
Solution Approach 1:
The lens assembly is divided into multiple lens elements (first lens element, second lens element, third lens element, fourth lens element, fifth lens element, sixth lens element) with specific focal lengths and refractive indices. Each lens element is independently designed and positioned along the optical axis, allowing precise control of light paths to prevent stray light while maintaining manageable manufacturing and assembly processes.
Solution Approach 2:
A light blocking sheet is introduced as an intermediary component between the lens elements and the image sensor. This light blocking sheet includes a light blocking portion that specifically blocks stray light from reaching the image sensor, while allowing useful light to pass through. This mediator effectively prevents stray light without requiring complex structural modifications to the lens elements themselves.
2Volume of moving object
If the camera module size is reduced for portable devices, then portability is improved, but optical quality and precision manufacturing become more difficult to achieve
Solution Approach 1:
The patent specifies precise parameter ranges for each lens element including focal length (e.g., f1 between 1.5mm to 3.0mm), refractive index (e.g., n1 between 1.50 to 1.70), and curvature radii (e.g., r1 between 0.5mm to 2.0mm). These controlled parameter changes allow the design of compact lens elements that maintain high optical precision within a reduced overall camera module size, enabling portable device integration without sacrificing image quality.
3Reliability
If multiple lens elements are added to improve image quality, then optical performance is enhanced, but device complexity and manufacturing difficulty increase
Solution Approach 1:
Each lens element is designed with specific local optical properties including distinct focal lengths, refractive indices, and curvature radii optimized for their positions in the assembly. For example, the first lens element has positive refractive power with specific curvature radii (r1, r2) while the second lens element has negative refractive power with different curvature radii (r3, r4). This local optimization of quality parameters allows high image quality with manageable complexity through standardized design approaches for each position.
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 effectively reduces stray light, maintains image quality, and enhances the production efficiency of the camera module by integrating the reverse inclined structure and driving mechanism, providing a miniaturized and high-quality camera module with improved autofocus and image stabilization functions.
Implementation Method 1
the driving member includes at least one magnet and at least one coil, and one of the at least one magnet and the at least one coil is disposed on the fixed member and is corresponding to another one
Data Source
AI summary
A camera module includes a unitary element, an optical image lens assembly, a fixed member and a driving member. The unitary element has an object-side opening. The optical image lens assembly is disposed in a containing space and has an optical axis. The fixed member is for accommodating the unitary element and includes a base and a cover, and the cover has a through hole and is connected with the base. The driving member is for driving the unitary element to move relative to the fixed member. The unitary element includes a reverse inclined structure including at least two annular concave structures. The at least two annular concave structures are arranged in order from the object-side opening to an image side, wherein a sectional surface of each of the annular concave structures passing through the optical axis includes a valley point and two concave ends.