Color Conversion Panel With Irregular Blue Light Filter
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Solution Overview
Problem
Liquid crystal displays experience light loss due to polarizers and color filters, leading to reduced efficiency and luminance, necessitating a solution to enhance light emission and reliability.
Innovation Solution
A color conversion panel comprising a substrate, a color conversion layer with quantum dots, a transmission layer, and a blue light cutting filter with irregularities, which is integrated into a display device to improve light emission efficiency and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a liquid crystal display uses polarizers and color filters to achieve color display, then color reproduction is improved, but light loss increases and efficiency decreases
Solution Approach 1:
The patent replaces traditional color filters with quantum dot-based color conversion layers that convert blue LED light into red and green wavelengths. This parameter change in the light conversion mechanism eliminates the need for polarizers and color filters, reducing light loss from 70-80% to approximately 20% and significantly improving luminance efficiency
Solution Approach 2:
The patent substitutes the mechanical/optical system of polarizers and color filters with a quantum mechanical system using quantum dots. The quantum dots' size-dependent bandgap properties enable direct optical conversion without the light absorption and re-emission losses inherent in traditional filter-based systems
2Illumination intensity
If a blue light cutting filter with irregularities is introduced to reduce total reflection, then external light emission is improved, but device complexity increases
Solution Approach 1:
The patent introduces irregularities (curved surfaces) on the blue light cutting filter to reduce total internal reflection at the interface. These irregularities cause light to reflect at multiple angles rather than undergoing total internal reflection, thereby improving external light emission efficiency without requiring complex additional optical components
Solution Approach 2:
The blue light cutting filter with irregularities serves as an intermediary element between the quantum dot layer and the external environment. It mediates the light extraction process by reducing total reflection while maintaining the color conversion function, achieving improved light emission without adding significant structural complexity
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 integration of a color conversion panel with a blue light cutting filter and quantum dots enhances light emission efficiency and reliability by reducing total reflection and increasing external light emission, thereby improving display quality.
Implementation Method 1
a blue light cutting filter, wherein an interface between the color conversion layer and the blue light cutting filter includes irregularities
Implementation Method 2
The color conversion layer includes a quantum dot
Implementation Method 3
An interface between the color conversion layer and the blue light cutting filter includes irregularities
Data Source
AI summary
A color conversion panel includes a substrate, a color conversion layer, a transmission layer, and a blue light cutting filter. The color conversion layer is disposed on the substrate. The color conversion layer includes a quantum dot. The transmission layer is disposed on the substrate. The blue light cutting filter is disposed between the substrate and the color conversion layer. An interface between the color conversion layer and the blue light cutting filter includes irregularities.