Near-eye Display Phase Modulation for Resolution
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Solution Overview
Problem
Existing near-eye display devices face challenges in achieving high resolution while providing both two-dimensional and three-dimensional image information, leading to reduced image quality.
Innovation Solution
Incorporating a liquid crystal layer between the display panel and the lens element, which modulates the image light beam through phase modulation, allowing for continuous adjustment of the image position, thereby enhancing resolution by synthesizing pre- and post-adjustment images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If light field NED is used to reduce optical path length and achieve light weight, then the overall optical path length is reduced and weight is decreased, but image resolution is drastically reduced
Solution Approach 1:
The patent changes the optical parameters of the liquid crystal layer by applying different voltages to adjust the refractive index and thickness, thereby modulating the phase of light beams. This enables the system to achieve high resolution by synthesizing multiple images with different optical paths while maintaining the light field NED's weight and compactness advantages
Solution Approach 2:
The liquid crystal layer is made dynamically adjustable through voltage control, allowing real-time modification of its optical properties. This dynamic adjustment enables the system to generate multiple images at different positions and synthesize them to achieve high resolution, resolving the contradiction between compact design and image quality
2Adaptability or versatility
If light field NED provides three-dimensional information along with two-dimensional image data, then depth perception is enhanced, but image resolution is drastically reduced
Solution Approach 1:
The patent segments the light field into multiple discrete light beams and processes them independently through the liquid crystal layer. By controlling each light beam's phase and direction separately, the system can provide three-dimensional information while maintaining high resolution through selective synthesis of multiple images
Solution Approach 2:
The patent introduces an additional spatial dimension by displacing images in different directions through the liquid crystal layer. This dimensional manipulation allows the system to encode three-dimensional information while preserving resolution through the synthesis of multiple displaced images
3Manufacturing precision
If a liquid crystal layer is added between the display panel and lens element for phase modulation, then image resolution is improved, but device complexity increases
Solution Approach 1:
The liquid crystal layer serves multiple functions simultaneously: it acts as a phase modulator, an image displacer, and a dynamic optical element for generating multiple images. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving high resolution
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 near-eye display device achieves high resolution by continuously adjusting the image position, allowing users to see a high-resolution image formed by combining the pre- and post-adjustment positions, outperforming existing devices in image clarity.
Implementation Method 1
At least a portion of the liquid crystal layer modulates the image light beam according to phase modulation
Data Source
AI summary
A near-eye display device including a display panel, a liquid crystal layer, and a lens element is provided. The liquid crystal layer is disposed adjacent to the display panel and disposed between the display panel and the lens element. The display panel is configured to provide an image light beam to pass through the liquid crystal layer. At least a portion of the liquid crystal layer is configured to modulate the image light beam according to the phase modulation. Phase modulation occurs to at least a portion of the liquid crystal layer to modulate the image light beam, and the lens element is a micro lens array.