Color Conversion Panel With Varying Layer Heights
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Solution Overview
Problem
Current display devices with color conversion panels face challenges in achieving high light efficiency due to limitations in the design of the color conversion layer and light shielding patterns, which affect the conversion and emission of light across pixel and non-pixel areas.
Innovation Solution
A color conversion panel design featuring a substrate with a light shielding pattern in non-pixel areas, a color conversion layer with varying heights and thicknesses between pixel and non-pixel areas, and a light shielding partition wall, where the height of the color conversion layer in non-pixel areas is less than in pixel areas, and grooves are formed to enhance light reflection and emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the color conversion layer has uniform height across pixel and non-pixel areas, then the manufacturing process is simple, but light efficiency is reduced due to light leakage in non-pixel areas
Solution Approach 1:
The color conversion layer is designed with different heights in different regions: a first height in pixel areas and a lower second height in non-pixel areas. This local differentiation allows the layer to optimize light conversion in pixel areas while preventing light leakage in non-pixel areas, thereby improving overall light efficiency without significantly complicating the manufacturing process.
Solution Approach 2:
The patent introduces height variation as a new dimensional parameter to solve the light efficiency problem. By controlling the thickness profile of the color conversion layer in the vertical dimension, the patent achieves both high light conversion efficiency in pixel areas and effective light blocking in non-pixel areas, resolving the contradiction between manufacturing simplicity and light efficiency.
2Use of energy by moving object
If the color conversion layer is made thicker to improve light conversion, then light conversion efficiency increases, but light leakage in non-pixel areas worsens
Solution Approach 1:
The color conversion layer thickness is optimized locally: thicker in pixel areas to maximize light conversion efficiency, and thinner in non-pixel areas to minimize light leakage. This spatially differentiated thickness profile resolves the contradiction by allowing each region to have the optimal thickness for its specific function.
Solution Approach 2:
The color conversion layer is segmented into distinct regions with different thicknesses: a first region corresponding to pixel areas with greater thickness for high conversion efficiency, and a second region corresponding to non-pixel areas with lesser thickness to prevent light leakage. This segmentation allows simultaneous optimization of both conversion efficiency and light leakage prevention.
3Loss of energy
If light shielding patterns are added to non-pixel areas to prevent light leakage, then light efficiency improves, but device complexity increases
Solution Approach 1:
Instead of adding complex light shielding patterns across the entire device, the patent applies a simpler solution: reducing the thickness of the color conversion layer specifically in non-pixel areas. This local modification prevents light leakage without requiring additional light shielding structures, thereby improving light efficiency while maintaining relatively simple device architecture.
Solution Approach 2:
The patent extracts the light shielding function from a separate light shielding pattern layer and integrates it into the color conversion layer itself by reducing its thickness in non-pixel areas. This eliminates the need for additional light shielding structures while maintaining the light leakage prevention function, thereby reducing device complexity.
4Loss of energy
If the color conversion layer height varies significantly to improve light efficiency, then light reflection near boundaries improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent implements moderate height variation in the color conversion layer: a first height in pixel areas and a second height in non-pixel areas. The height difference is optimized to be sufficient for light reflection and leakage prevention, but not so large as to create excessive manufacturing challenges. This balanced approach improves light efficiency while maintaining feasible manufacturing precision requirements.
Solution Approach 2:
The patent uses controlled height variation in the vertical dimension as a mechanism to improve light efficiency through enhanced reflection at boundaries. By optimizing the degree of height variation, the patent achieves effective light management while keeping manufacturing precision requirements within practical limits.
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 design increases light efficiency by reflecting and emitting light effectively near the boundaries between pixel and non-pixel areas, improving the overall performance of the display device.
Implementation Method 1
a color conversion layer disposed on the substrate and covering the light shielding pattern and configured to convert an incident light
Implementation Method 2
the color conversion layer may include at least one of a quantum dot and a fluorescent substance
Implementation Method 3
a light shielding pattern disposed on the substrate in the non-pixel area
Implementation Method 4
a light shielding partition wall disposed on the color conversion layer in the non-pixel area... reflecting and emitting light effectively near the boundaries between pixel and non-pixel areas
Data Source
AI summary
In a color conversion panel including pixel areas emitting a light having a same color and a non-pixel area between the pixel areas, the color conversion panel may include a substrate, a light shielding pattern disposed on the substrate in the non-pixel area, a color conversion layer disposed on the substrate, covering the light shielding pattern, and configured to convert an incident light, a height of a first portion of the color conversion layer corresponding to the non-pixel area from the substrate being less than each of heights of second portions of the color conversion layer respectively corresponding to the pixel areas from the substrate, and a light shielding partition wall disposed on the color conversion layer in the non-pixel area.