Color Conversion Layer Integration With Light Distribution Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-intensity light sources in color displays cause degradation of color conversion layers due to hot spots, leading to inefficient light distribution across pixels.
Innovation Solution
Incorporating a light distribution structure, such as a light guide or reflective layers with a planarization layer, and a light attenuator structure to distribute and attenuate light intensity, reducing direct lines of sight between the light source and the color conversion layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a high-intensity light source is used to generate sufficient light for the pixel, then the light output is improved, but the color conversion layer degrades due to hot spots
Solution Approach 1:
A light distribution structure is introduced as an intermediary component between the light source and color conversion layer. This structure includes a light guide layer with scattering particles and reflective layers that redistribute the concentrated light from the small light source across the larger pixel area, reducing peak intensity at any single point while maintaining overall light output.
Solution Approach 2:
The light distribution structure transforms the light propagation from a direct one-dimensional path to a multi-dimensional distribution pattern. By incorporating scattering particles and reflective layers at different spatial positions and orientations, the light is redirected through multiple paths and angles, effectively spreading the energy across the color conversion layer surface.
2Productivity
If the light source size is made smaller to increase light intensity, then the light generation efficiency is improved, but the hot spot effect worsens
Solution Approach 1:
The light distribution structure serves as a mediator that decouples the light source size from the pixel size. The light guide layer and reflective structures redistribute the concentrated light from the small light source across the entire pixel area, allowing the system to maintain high light generation efficiency while eliminating the direct proportionality between source size and intensity concentration.
Solution Approach 2:
The system changes the spatial distribution parameters of light intensity by introducing scattering particles with specific size distributions and reflective layers at optimized positions. This transforms the light intensity profile from a concentrated peak to a distributed pattern, maintaining total light output while reducing peak intensity values that cause hot spots.
3Use of energy by moving object
If direct light paths are maintained from light source to color conversion layer, then the optical efficiency is improved, but the stress concentration on the conversion layer increases
Solution Approach 1:
The light distribution structure acts as an intermediary optical system that maintains high overall optical efficiency while redistributing stress. The light guide layer and reflective structures are designed to minimize light loss through scattering and reflection, ensuring that most light reaches the color conversion layer while the intensity is spread out to reduce stress concentration.
Solution Approach 2:
The system applies local quality variations through strategically placed reflective layers and scattering particles with different properties at different locations. This creates a non-uniform light distribution pattern that optimizes both optical efficiency and stress distribution, with higher light intensity in regions that benefit from it and lower intensity in regions where stress reduction is prioritized.
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 solution effectively reduces hot spots and ensures even light distribution across pixels, enhancing the longevity and performance of color conversion layers in display systems.
Implementation Method 1
the light distributor is comprised of a light guide
Implementation Method 2
the light distributor is comprised of reflective layers and a planarization layer
Implementation Method 3
a light conversion layer for converting the light to a desired color
Implementation Method 4
an attenuator or blocking structure is used to reduce or block the light intensity from a direct line of sight between the light source and the light conversion
Data Source
AI summary
The disclosure is related to arranging integrating color conversion layer into a pixel structure by distributing the light output of the light source, and using an attenuator to reduce the hot spot effect caused by high light intensity light at a direct point of sight.