Convex Lens Assembly for Smaller Display Camera Openings
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Solution Overview
Problem
The large size of the lens assembly head in existing cameras reduces the screen-to-body ratio of electronic devices due to the corresponding large hole on the display screen, compromising the aesthetic and functional aspects of the device.
Innovation Solution
The lens assembly is designed with a convex surface on the lens close to the object side protruding from the shoulder of the lens tube, minimizing the head size without affecting the maximum field of view, and incorporating specific lens configurations with varying refractive indexes and focal powers to enhance light beam bending capability and reduce the distance to the photosensitive element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the lens assembly head size is reduced, then the hole on the display screen is reduced and screen-to-body ratio is improved, but the maximum field of view may be affected
Solution Approach 1:
The first lens is designed with a convex surface that protrudes from the shoulder of the lens tube, utilizing curved geometry to maximize light collection within a compact head size. This spherical/convex shape allows the lens to maintain optical effectiveness while reducing the overall head dimensions, thereby improving screen-to-body ratio without significantly compromising field of view
Solution Approach 2:
The patent employs lenses with varying refractive indexes (the first lens has refractive index greater than 1.6, while the second through fifth lenses have refractive indexes less than 1.55) to optimize light bending capability. By changing optical parameters such as refractive index and focal length, the system achieves compact dimensions while maintaining adequate field of view performance
2Speed
If lenses with higher refractive indexes are used, then light beam bending capability is enhanced and distance to photosensitive element is reduced, but manufacturing complexity and cost increase
Solution Approach 1:
The patent applies high refractive index material specifically to the first lens where light enters the system, which is the most critical position for bending light. The subsequent lenses use lower refractive index materials, creating a gradient of optical quality that optimizes light control where needed most while reducing manufacturing complexity and cost for the remaining lenses
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 design effectively reduces the size of the lens assembly head, minimizing the hole on the display screen and enhancing the screen-to-body ratio while maintaining image quality and reducing the overall thickness of the electronic device.
Implementation Method 1
lenses with varying refractive indexes and focal powers to enhance light beam bending capability
Data Source
AI summary
A lens assembly and an electronic device including the same are provided. The lens assembly includes a lens group. A lens that is in the lens group and that is close to an object side has a convex surface, and the convex surface protrudes from a shoulder of a lens tube. A head of the lens assembly may be reduced without affecting a maximum field of view of the lens assembly, so that the head of the lens assembly tends to be miniaturized. Therefore, a size of a hole provided on a display screen is reduced. Thus, a screen-to-body ratio of the display screen is improved.