Color Conversion Panel Light Blocking Layer External Reflection
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Solution Overview
Problem
Liquid crystal displays face challenges in reducing external light reflection, which leads to color reproducibility distortion and reduced light output, as existing technologies do not effectively manage external light absorption and reflection in the color conversion process.
Innovation Solution
A color conversion panel is designed with a light blocking layer comprising a first and second sub-light blocking layer, including external light absorption and reflection layers, and a transmission layer with quantum dots, to absorb external light and recycle reflected light, thereby minimizing external light reflection and enhancing light output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light blocking layer is added to reduce external light reflection, then color reproducibility is improved, but device complexity increases
Solution Approach 1:
The light blocking layer is segmented into two distinct sub-layers: a external light absorption layer (first sub-light blocking layer) and a reflection layer (second sub-light blocking layer). This segmentation allows each sub-layer to perform its specific function - the absorption layer blocks external light from entering the display, while the reflection layer redirects internal light back toward the viewer, thereby improving color reproducibility without requiring a complete redesign of the display structure.
Solution Approach 2:
The patent introduces a new dimensional approach by adding the light blocking layer as an additional structural dimension between the display panel and the external environment. This extra layer provides a new dimension for light management, allowing simultaneous control of both external light absorption and internal light reflection, thus improving color accuracy without compromising the fundamental display architecture.
2Object-affected harmful factors
If a double stacked light blocking structure is used to absorb external light, then external light reflection is reduced, but light output ratio decreases
Solution Approach 1:
The patent converts the potentially harmful effect of light absorption into a beneficial outcome by strategically positioning the external light absorption layer to block only external ambient light while allowing internally generated display light to pass through. The reflection layer further converts reflected light that would otherwise be lost back into useful display light, thereby reducing external light reflection without significantly compromising the light output ratio.
Solution Approach 2:
The light blocking layer exhibits local quality by having different optical properties in different regions and for different light directions. The external light absorption layer selectively absorbs external light coming from specific angles while being transparent to light traveling in the display-to-viewer direction. The reflection layer reflects light locally back toward the viewer, creating a localized benefit that improves overall display performance without uniform light loss.
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 external light reflection, improves color reproducibility, and increases the light output ratio by using a double stacked structure with organic and inorganic light-blocking materials and metal reflection layers, enhancing the display's optical performance.
Implementation Method 1
the first sub-light blocking layer and the second sub-light blocking layer respectively include an external light absorption layer disposed on the substrate, and a reflection layer disposed on the external light absorption layer
Implementation Method 2
a reflection layer disposed on the external light absorption layer
Data Source
AI summary
A color conversion panel includes a substrate, a light blocking layer on the substrate, and color conversion layers and a transmission layer on the substrate, the color conversion layers including a quantum dot, wherein the light blocking layer includes a first sub-light blocking layer overlapping the color conversion layers and the transmission layer, and a second sub-light blocking layer between adjacent ones of the color conversion layers and the transmission layer, and wherein each of the first sub-light blocking layer and the second sub-light blocking layer includes an external light absorption layer on the substrate, and a reflection layer on the external light absorption layer.