Quantum Dot Color Filter Substrate With Segmented Filling Cavities
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Solution Overview
Problem
Current liquid crystal displays with white light emitting sources have limited luminous efficiency, brightness, and color gamut due to non-uniform distribution of quantum dots in color resistance blocks, leading to impure colors and low color gamut.
Innovation Solution
A color filter substrate with filling cavities in each sub-pixel region filled with quantum dots of different diameters, allowing for uniform distribution and emission of distinct colors, eliminating the need for color resistance blocks and simplifying the fabrication process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If quantum dots are doped in a color resistance block, then color gamut is improved, but non-uniform distribution occurs and exposure and development are influenced
Solution Approach 1:
The invention divides the sub-pixel region into multiple filling cavities, each containing quantum dots of a specific size. This segmentation ensures uniform distribution of quantum dots while maintaining improved color gamut, resolving the contradiction between color enhancement and manufacturing precision.
Solution Approach 2:
Different regions (filling cavities) within the sub-pixel are given different local qualities by using quantum dots of different sizes in different cavities. This local differentiation achieves uniform distribution while maintaining the overall color gamut improvement.
2Illumination intensity
If quantum dots are doped in a color resistance block, then color gamut is improved, but exposure and development of color resistance block material are influenced
Solution Approach 1:
The invention extracts the quantum dots from the color resistance block material and places them in separate filling cavities. This separation eliminates the interference of quantum dots with the exposure and development processes of the color resistance block material, while still achieving improved color gamut.
3Illumination intensity
If color resistance blocks are used, then color display is realized, but luminous efficiency and brightness are limited
Solution Approach 1:
The invention changes the physical parameters of the light-emitting structure by using quantum dots with size-dependent emission properties instead of traditional color resistance blocks. This parameter change enables higher luminous efficiency and brightness while maintaining color display capability.
Solution Approach 2:
The invention uses composite structures combining quantum dots of different sizes within filling cavities to achieve both high luminous efficiency and color display performance, overcoming the limitations of traditional color resistance blocks.
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 enhances color gamut and saturation by ensuring uniform quantum dot distribution, improving light conversion efficiency and purity, and simplifying the manufacturing process.
Implementation Method 1
the quantum dots in all the filling cavities are made of the same material, the particle diameters of the quantum dots in the same filling cavity are the same, the particle diameters of the quantum dots in the filling cavities of different sub-pixel regions of any pixel unit are different, and accordingly, the quantum dots in the filling cavities of different sub-pixel regions can emit light with different colors after being excited
Data Source
AI summary
The present invention provides a color filter substrate, comprising a plurality of pixel units, each pixel unit comprises a plurality of sub-pixel regions, wherein a filling cavity is formed in each sub-pixel region, at least the top wall of the filling cavity is transparent, each filling cavity is filled with quantum dots, the quantum dots in all the filling cavities are made of the same material, the particle diameters of the quantum dots in the same filling cavity are the same, the particle diameters of the quantum dots in the filling cavities of different sub-pixel regions of any pixel unit are different, and accordingly, the quantum dots in the filling cavities of different sub-pixel regions in any pixel unit can emit light of different colors after being excited. Accordingly, the present invention further provides a fabricating method of the color filter substrate, a display panel and a display device.