Sub-Pixel Layout for Under-Display Diffraction Flare Mitigation
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Solution Overview
Problem
Under-display sensors in computing devices experience optical artifacts such as diffraction flares, blurring, and over-saturation due to the periodic pattern of sub-pixels in the display panel, which degrade sensor data resolution and sharpness, especially under bright ambient lighting conditions.
Innovation Solution
An equation is derived to model the diffraction phenomenon at the image plane of under-display light-sensing devices, allowing for an optimized arrangement of sub-pixels within the display panel to minimize diffraction efficiencies and reduce optical artifacts by adjusting sub-pixel positions and orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional display panel arrangement is used, then the display structure is simple and easy to manufacture, but diffraction flares and optical artifacts occur in under-display sensing
Solution Approach 1:
The patent applies parameter changes by modifying the sub-pixel arrangement parameters (positions, sizes, and patterns) to minimize diffraction effects. The optimized sub-pixel layout changes the physical parameters of the display structure to reduce diffraction efficiency for specific diffraction orders, thereby improving sensing accuracy without fundamentally changing the display technology
2Object-affected harmful factors
If an optimized sub-pixel arrangement is implemented, then diffraction efficiency is reduced and optical artifacts are minimized, but the display design and manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by implementing non-uniform sub-pixel arrangements where specific sub-pixels are positioned with different spacing and patterns in different regions. This localized optimization targets specific diffraction orders while maintaining overall display functionality, reducing optical artifacts without requiring complete redesign of the entire display structure
3Reliability
If the sub-pixel arrangement is optimized for specific diffraction orders, then diffraction flares are reduced, but the optimization may affect other diffraction orders or display performance
Solution Approach 1:
The patent applies asymmetry by using non-symmetric sub-pixel arrangements that are specifically designed to minimize diffraction in critical directions and orders. The asymmetric layout disrupts the periodicity that causes diffraction flares while maintaining sufficient symmetry to preserve overall display quality and adaptability across different viewing conditions
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 optimized sub-pixel arrangement significantly reduces the intensity and prevalence of optical artifacts in sensor data, enhancing the performance and accuracy of under-display sensors.
Implementation Method 1
an equation may be derived that models the effects of a display in producing a diffraction phenomenon at an image plane of a sensing region for an under-display light-sensing device
Data Source
AI summary
This document describes systems and techniques directed at mitigating display diffraction flares for under-display sensing. In aspects, an equation may be derived that models the effects of a display in producing a diffraction phenomenon at an image plane of a sensing region for an under-display light-sensing device. The equation may be used to determine an arrangement (e.g., an optimized arrangement) of components (e.g., sub-pixels) within the display that minimizes a diffraction efficiency for at least one diffraction order and, thereby, mitigates an intensity and/or a prevalence of optical artifacts in light-sensing data. In implementations, an image intensity point-spread-function is utilized to calculate diffraction efficiencies for respective diffraction orders (e.g., the lowest diffraction orders, the diffraction orders with the greatest brightness).