Metamaterial Display Panel for Under-Display Camera Diffraction
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Solution Overview
Problem
Under Display Camera (UDC) technology faces challenges with low image quality due to diffraction phenomena, which are not effectively addressed by existing solutions such as reducing display pixel density or using computer algorithms for image restoration.
Innovation Solution
A meta-optical structure using a metamaterial designed via the adjoint optimization method is integrated into the display panel to maximize the intensity of 0-th-order diffracted light and reduce higher-order light, thereby minimizing diffraction effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If display pixel density is reduced to reduce diffraction, then image quality improves, but display quality deteriorates due to mosaic pattern
Solution Approach 1:
A metasurface is introduced as an intermediary component between the display panel and the under-display camera. This metasurface selectively manipulates light waves to suppress diffraction effects while allowing display pixels to maintain high density, thereby improving image quality without compromising display quality
Solution Approach 2:
The invention changes the optical parameters of light passing through the display panel by using a metasurface with specific geometric structures. These structures modify the phase and amplitude of light waves to eliminate diffraction patterns, enabling high image quality at high display pixel densities
2Measurement precision
If computer algorithms are used to restore degraded images, then image quality improves, but processing time increases making real-time restoration difficult
Solution Approach 1:
The invention replaces computational image restoration methods with a physical optical solution. Instead of using computer algorithms to restore degraded images after capture, a metasurface pre-corrects diffraction effects in the optical path, eliminating the need for time-consuming post-processing while achieving high image quality in real-time
3Measurement precision
If pixel arrangement is adjusted to improve image quality, then image quality improves, but intensity uniformity of display deteriorates
Solution Approach 1:
The metasurface acts as an intermediary that decouples the relationship between pixel arrangement and image quality. By placing the metasurface between the display panel and camera, the invention allows standard pixel arrangements to be used while still achieving high image quality through optical correction, thereby maintaining display intensity uniformity
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 approach significantly improves image and video quality in real-time without compromising pixel density, achieving high-quality images and videos even at higher Pixels Per Inch (PPI) compared to current UDC technology.
Implementation Method 1
A meta-optical structure using a metamaterial designed via the adjoint optimization method is integrated into the display panel to maximize the intensity of 0-th-order diffracted light and reduce higher-order light, thereby minimizing diffraction effects.
Data Source
AI summary
The present disclosure relates to a display panel which maximizes light and reduces high-order light to obtain high-quality images and/or videos by reducing the influence of diffracted light using metamaterials for UDC (Under Display Camera), a method for manufacturing the same, and a display device comprising the same, in which a metamaterial designed using the adjoint optimization method is formed on the lower part of the display substrate with a periodic arrangement structure.