Light Modulation Layer Layout for Display Color Crosstalk
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Solution Overview
Problem
Current display technologies face challenges in minimizing crosstalk between adjacent color film portions in display devices, leading to reduced brightness and contrast due to inefficient light modulation and color shift.
Innovation Solution
Incorporating a light modulation layer between the color film layer and the display substrate, featuring a metasurface structure with modulation and transmission structures that converge exit light from light-emitting portions, ensuring optimal light transmission and reduction of crosstalk between color film portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light modulation layer with metasurface structure is added, then crosstalk between adjacent color film portions is reduced and contrast is improved, but device complexity increases
Solution Approach 1:
A light modulation layer is introduced as an intermediary component between the display substrate and color film layer. This layer includes modulation portions with metasurface structures that selectively modulate light paths, preventing crosstalk while maintaining overall system functionality. The intermediary layer acts as a mediator that controls light interaction between adjacent pixels without requiring fundamental changes to the display substrate or color film layer.
Solution Approach 2:
The light modulation layer is divided into multiple modulation portions, each corresponding to a specific color film portion. Each modulation portion contains metasurface structures that are independently optimized for its associated pixel, allowing precise control of light paths for each pixel while maintaining modularity in the overall design.
2Illumination intensity
If modulation structures are positioned adjacent to color film portions, then light convergence is improved and brightness is enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The modulation portions are strategically positioned with different spatial relationships to color film portions based on local requirements. Transmission structures are placed where light transmission is prioritized, while modulation structures are positioned where light convergence and crosstalk reduction are more critical. This localized optimization allows the system to achieve high brightness where needed while managing manufacturing complexity through differentiated design zones.
3Productivity
If the light modulation layer uses metasurface structures with high refractive index materials, then light convergence efficiency is improved, but manufacturing difficulty increases
Solution Approach 1:
The metasurface structures utilize materials with high refractive indices to enhance light convergence efficiency. By selecting materials with optimized refractive index parameters, the system achieves improved light modulation performance. The specific refractive index values are chosen to balance optical performance with manufacturability, allowing effective light convergence without requiring excessively complex manufacturing processes.
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
Enhances the brightness of the display module by increasing the amount of exit light entering the color film portions while reducing crosstalk and improving contrast by effectively modulating light and minimizing light entry into adjacent color film portions.
Implementation Method 1
The modulation structure is used to converge exit light from the corresponding light-emitting portion
Implementation Method 2
θ=sin−1 (1/n), where n is a refractive index of the color film portion corresponding to the modulation structure
Data Source
AI summary
A display module is provided. The display module includes a light modulation layer, and the light modulation layer is located between a color film layer and a display substrate. The light modulation layer includes a plurality of modulation portions, and a modulation portion is correspondingly disposed between a light-emitting portion and a color film portion. The modulation portion includes a modulation structure and a transmission structure. The color film portion includes a first region and a second region. An orthogonal projection of the transmission structure on the corresponding color film portion is located within the first region. The second region is adjacent to another color film portion of a different color, and an orthogonal projection of the modulation structure on the corresponding color film portion is located in the second region. The modulation structure is used to converge exit light of the corresponding light-emitting portion.