Compound Lens With Segmented Focal Lengths For VR Displays
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Solution Overview
Problem
Current virtual reality display devices suffer from inadequate image quality due to lenses providing excessive resolution in peripheral regions and insufficient resolution in central regions, leading to reduced sharpness and diminished 3D effect for the viewer.
Innovation Solution
A display device equipped with two compound lenses, each comprising a central lens portion with a longer focal length and at least one peripheral lens portion with a shorter focal length, arranged concentrically to match the human eye's resolution distribution, ensuring higher resolution in the central image region and lower resolution in the peripheral region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single lens with uniform focal length is used, then the manufacturing is simple, but the image quality is insufficient due to excessive resolution in peripheral regions and insufficient resolution in central regions
Solution Approach 1:
The lens is divided into multiple regions: a central lens portion with first focal length and peripheral lens portions with second focal length. This segmentation allows different regions to provide different resolutions, matching the human eye's resolution distribution and improving overall image quality.
Solution Approach 2:
Different focal lengths are assigned to different regions of the lens. The central region has a longer focal length for higher resolution, while the peripheral regions have shorter focal lengths for lower resolution, creating local quality variations that match human visual perception.
2Reliability
If the lens provides uniform resolution across the entire image region, then the manufacturing is easier, but the 3D effect is reduced due to mismatch with human eye resolution capabilities
Solution Approach 1:
The lens provides different resolutions in different regions to match human eye capabilities. The central region provides higher resolution while peripheral regions provide lower resolution, creating a more realistic 3D effect that aligns with natural human vision.
Solution Approach 2:
The focal length parameter is changed across different regions of the lens. By varying the focal length from central to peripheral regions, the lens adapts its optical properties to match human visual perception, enhancing the 3D effect.
3Manufacturing precision
If a compound lens with multiple focal lengths is used, then the image sharpness is improved, but the device complexity increases
Solution Approach 1:
The compound lens is segmented into a central lens portion and peripheral lens portions with different focal lengths. This segmentation enables the lens to provide higher sharpness in the central image region while maintaining functional complexity through a structured design.
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 image quality by aligning with the human eye's resolution capabilities, improving the perceived sharpness and 3D effect by redistributing pixel density, thereby providing a more immersive virtual reality experience.
Implementation Method 1
a central lens portion having a first focal length and at least one peripheral lens portion having a second focal length and surrounding the central lens portion
Data Source
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AI summary
Provided are a compound lens and a display device including the same. The compound lens may improve image quality by providing a higher resolution in a central image region and a lower resolution in a peripheral image region. The compound lens includes a central lens portion and at least one peripheral lens portion, the at least one peripheral lens portion surrounds the central lens portion, the central lens portion has a first focal length, the at least one peripheral lens portion has a second focal length, and the first focal length is greater than the second focal length.