Color Conversion Element with Partial Color Filter for Luminance and Purity
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Solution Overview
Problem
Current colour conversion elements in display devices face challenges in balancing luminance and colour purity, particularly for blue light, as they either compromise on viewing angle or suffer from colour mixing between adjacent layers.
Innovation Solution
A colour conversion element with a base substrate, light blocking member, and colour filter and conversion layers is designed, where the first colour filter layer is strategically placed only in part of the first colour region to allow partial light transmission, while the second and third colour conversion layers are fully present in their respective regions, using quantum dots and scattering agents to enhance luminance and viewing angle without colour mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the first colour filter layer is disposed in the entire first colour region, then colour purity is improved, but luminance is reduced due to excessive light blocking
Solution Approach 1:
The first colour filter layer is disposed only in a specific region of the first colour region, not the entire area. This local placement allows different regions to have different optical properties: the filtered region provides colour purity while the unfiltered region maintains luminance, thus resolving the contradiction between colour purity and luminance.
Solution Approach 2:
The first colour region is divided into multiple regions, with the first colour filter layer placed only in a specific subset. This segmentation allows selective application of colour filtering only where needed, preserving luminance in other areas while achieving sufficient colour purity in the filtered zones.
2Illumination intensity
If the first colour filter layer is completely removed, then luminance is improved, but colour purity deteriorates due to colour mixing
Solution Approach 1:
Instead of uniformly applying the colour filter across the entire first colour region, the filter is placed only in a specific region. This local quality approach ensures that colour purity is maintained in the filtered area while luminance is preserved in the unfiltered area, avoiding the need to completely remove the filter.
3Adaptability or versatility
If quantum dots and scattering agents are used in colour conversion layers, then viewing angle is improved, but device complexity increases
Solution Approach 1:
Multiple functional layers (quantum dot layer, scattering agent layer, colour conversion layers) are combined into a single integrated colour conversion element structure. This merging approach achieves improved viewing angle through the optical properties of quantum dots and scattering agents while consolidating the overall device structure, thereby managing 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
This configuration sets a balance between luminance and viewing angle/colour purity for specific colours, improving the overall display performance by optimizing light transmission and emission characteristics.
Implementation Method 1
using quantum dots and scattering agents to enhance luminance and viewing angle without colour mixing
Implementation Method 2
using quantum dots and scattering agents to enhance luminance and viewing angle without colour mixing
Data Source
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AI summary
A colour conversion element includes a base substrate, and a first colour filter layer, a second colour conversion layer, and a third colour conversion layer disposed on the base substrate, wherein the first colour filter layer, the second colour conversion layer, and the third colour conversion layer are sequentially arranged on a plane, and wherein an interval between the first colour filter layer and the second colour conversion layer or an interval between the first colour filter layer and the third colour conversion layer is different from an interval between the second colour conversion layer and the third colour conversion layer.