Compact Wide-Angle Lens Assembly for Bezel-Less Mobile Devices
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Solution Overview
Problem
There is a demand for miniaturization of imaging apparatuses in mobile devices, particularly for wide-angle lenses to accommodate increased front-side shot capabilities and bezel-less designs in electronic apparatuses.
Innovation Solution
A compact wide-angle optical lens assembly is developed, comprising multiple lenses with specific refractive powers and a stop configuration, satisfying certain inequalities to optimize focal lengths and curvature ratios, allowing for a reduced barrel entrance diameter and effective screen size expansion in mobile devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of lenses is increased to improve optical performance and reduce aberration, then image quality is improved, but the overall length and complexity of the lens assembly increases
Solution Approach 1:
The lens assembly is divided into six distinct lens elements with specific refractive power assignments (negative, positive, negative, positive, positive, negative) to distribute optical correction functions across multiple segments, enabling effective aberration reduction while managing overall length through optimized spacing
Solution Approach 2:
The patent applies specific parameter constraints including focal length ratios (f1/f5 between -300 to -50), curvature radius ratios (R3/R4 between -1 to 1), and effective radius ratios (L1ape/L6ape between 0.2 to 0.4) to optimize the optical system, allowing high image quality with controlled overall length
2Adaptability or versatility
If the focal length is reduced to achieve wide-angle view, then field of view is improved, but optical performance and aberration control deteriorate
Solution Approach 1:
Different regions of the lens assembly are assigned different functions: the first lens (negative power) and third lens (negative power) control peripheral light for wide-angle coverage, while the second lens (positive power), fourth lens (positive power), and fifth lens (positive power) focus on central image quality and aberration correction, enabling both wide field of view and high optical performance
Solution Approach 2:
The patent implements specific parameter constraints including focal length ratio (f1/f5 between -300 to -50) and curvature radius ratio (R3/R4 between -1 to 1) to maintain optimal optical performance across the wide field of view, preventing distortion and aberration even at reduced focal lengths
3Volume of moving object
If the barrel entrance diameter is reduced for miniaturization, then device size is improved, but light gathering ability and image brightness deteriorate
Solution Approach 1:
The patent optimizes the ratio of effective radius of the object side surface of the first lens (L1ape) to the effective radius of the image side surface of the sixth lens (L6ape) to be between 0.2 and 0.4, which allows for a compact barrel entrance diameter while maintaining sufficient light gathering ability and image brightness through optimized light path control
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 provides a compact optical lens assembly that reduces aberration, achieves high-resolution images, and supports wide-angle views, suitable for bezel-less structures while maintaining optical performance, enhancing the camera capabilities of mobile devices.
Implementation Method 1
a first lens having a negative refractive power, a second lens having a positive refractive power, a third lens having a negative refractive power, a fourth lens having a refractive power, a fifth lens having a refractive power, a sixth lens having a negative refractive power
Data Source
AI summary
The optical lens assembly may include a first lens having a negative refractive power, a second lens having a positive refractive power, a third lens having a negative refractive power, a fourth lens having a refractive power, a fifth lens having a refractive power, a sixth lens having a negative refractive power, and a stop disposed at an object side of the first lens.