Under-Display Camera Lens Assembly for Full-Screen Mobile Design
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Solution Overview
Problem
Current solutions for achieving a high screen-to-body ratio in mobile phones, such as notch screens and lift-type cameras, compromise on design and functionality, and there is a need for a technology that integrates a camera under the display to realize a true full-screen experience without compromising imaging quality or thickness.
Innovation Solution
A camera lens assembly with a specific configuration of lenses, including a stop and six lenses with controlled refractive powers and surface shapes, is integrated under the display screen, allowing for ultra-thin and high-quality imaging while maintaining a compact form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the camera is integrated under the display screen, then the screen-to-body ratio is improved and full-screen design is achieved, but the imaging quality and thickness are compromised
Solution Approach 1:
The camera lens assembly is divided into six individual lenses with different refractive powers and surface shapes, arranged in sequence from the object side to the image side. This segmentation allows each lens to contribute to correcting specific aberrations, thereby maintaining high imaging quality despite the compact under-display integration
Solution Approach 2:
Each lens in the assembly has specifically designed local properties: the first lens has a convex object-side surface, the fourth lens has a concave object-side surface, the sixth lens has a concave object-side surface and negative refractive power, while others have positive refractive power. These localized optical properties enable precise correction of various aberrations to maintain imaging quality
2Area of stationary object
If the camera is integrated under the display screen, then the screen-to-body ratio is improved and full-screen design is achieved, but the thickness is increased
Solution Approach 1:
The patent uses exactly six lenses in the assembly, which is a specific number that balances the need for aberration correction with the constraint of thickness reduction. This partial action approach (using six rather than more or fewer lenses) achieves adequate imaging quality while controlling the overall thickness of the under-display camera module
3Manufacturing precision
If multiple lenses are used to improve imaging quality, then the imaging quality is improved, but the device complexity increases
Solution Approach 1:
The patent systematically varies key parameters across the six lenses including refractive power (positive for most lenses, negative for the sixth lens), surface shapes (convex or concave object-side surfaces), and Abbe numbers (with specific constraints on the difference between adjacent lenses). These parameter changes enable high imaging quality while maintaining a regular, manufacturable lens assembly structure
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 enables a true full-screen design by integrating the camera under the display, achieving an ultra-thin profile with high imaging quality and ease of production, supporting a larger field-of-view and wider imaging range while reducing aberrations and ghost images.
Implementation Method 1
a first lens having a positive refractive power with an object-side surface thereof is a convex surface; a second lens having a positive refractive power; a third lens; a fourth lens; a fifth lens having a positive refractive power; a sixth lens having a negative refractive power with an object-side surface thereof is a concave surface
Data Source
AI summary
The present disclosure discloses a camera lens assembly comprising, sequentially from an object side to an image side along an optical axis, a stop; a first lens having a positive refractive power with an object-side surface thereof being a convex surface; a second lens having a positive refractive power; a third lens; a fourth lens; a fifth lens having a positive refractive power; a sixth lens having a negative refractive power with an object-side surface thereof being a concave surface; and wherein, a distance Ts along the optical axis from the stop to the object-side surface of the first lens satisfies: 0<Ts<0.2 mm.