Display Pixel Protective Layer Layout for Color Conversion Accuracy
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Solution Overview
Problem
Existing display devices face challenges in improving processability during manufacturing, particularly in forming protective layers with varying thicknesses and incorporating color conversion layers and filters to achieve optimal color reproduction and luminous efficiency.
Innovation Solution
A display device design with varying protective layer thicknesses and strategic placement of color conversion layers and filters, including bank patterns and light-emitting elements, to enhance manufacturing processability and color accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If protective layers with varying thicknesses are formed in different pixels, then manufacturing processability is improved and color reproduction is enhanced, but the device structure becomes more complex and manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by forming protective layers with different thicknesses in different pixel regions. Specifically, the protective layer in the third pixel has a greater thickness than in the first and second pixels, allowing optimization of color reproduction and luminous efficiency for each pixel type while maintaining ease of manufacture through selective thickness control during the deposition process
2Manufacturing precision
If color conversion layers and filters are selectively injected, then color reproduction accuracy is improved and luminous efficiency is enhanced, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies preliminary action by pre-forming the protective layers with different thicknesses before injecting the color conversion layers and filters. This preliminary structuring enables selective injection into specific pixels (first, second, and third pixels) with improved color reproduction accuracy while organizing the manufacturing process in a systematic sequence that manages complexity
Solution Approach 2:
The patent applies local quality by selectively injecting color conversion layers and filters into specific pixel regions based on their protective layer thickness. The first color filter is disposed in the first pixel, the second color filter in the second pixel, allowing each pixel to achieve optimal color reproduction characteristics tailored to its specific structure
3Productivity
If the protective layer thickness is increased in the third pixel, then luminous efficiency is enhanced and color mixing is prevented, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by increasing the protective layer thickness specifically in the third pixel while maintaining different thicknesses in the first and second pixels. This localized thickness increase enhances luminous efficiency and prevents color mixing in the third pixel without requiring uniform high precision across all pixels, as each region's thickness is optimized for its specific function
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 improves manufacturing efficiency and color reproduction by allowing selective injection of color conversion layers and filters, enhancing luminous efficiency and color mixing prevention.
Implementation Method 1
a scattering layer disposed in the third pixel
Data Source
AI summary
A display device includes a first pixel, a second pixel, and a third pixel, bank patterns disposed on a substrate, light-emitting elements disposed between the bank patterns, color conversion layers disposed on the light-emitting elements between the bank patterns, and protective layers disposed on the color conversion layers, wherein the protective layers in the first pixel, the second pixel, and the third pixel have different thicknesses.