Liquid Crystal Display Color Filter Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display devices face challenges in achieving high luminance and color reproducibility while reducing power consumption, particularly in mounting effective color filters.
Innovation Solution
A liquid crystal display device is designed with a color filter layer comprising blue, green, and red filters, each formed from specific compositions meeting certain thickness and composition ratio requirements, combined with a light-emitting device featuring a quantum dot color conversion layer to optimize emission peaks within specific wavelength ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a high-lightness color filter is mounted to improve luminance, then luminance increases, but color reproducibility deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling the film thickness and composition ratios of the color filter layers. Specific formulas are provided: for the red color filter, 0.05 ≤ FR×CR ≤ 0.5; for the green color filter, 0.05 ≤ FG×CG ≤ 0.5; for the blue color filter, 0.05 ≤ FB×CB ≤ 0.5. These parameter constraints optimize both luminance and color reproducibility by balancing the product of film thickness and coloring agent ratio.
Solution Approach 2:
The patent uses composite materials by combining specific coloring agents with binders in defined ratios. The red color filter uses a red coloring agent and binder with ratio 0.95 ≤ CR ≤ 1.05; the green color filter uses a green coloring agent and binder with ratio 0.95 ≤ CG ≤ 1.05; the blue color filter uses a blue coloring agent and binder with ratio 0.95 ≤ CB ≤ 1.05. This composite approach ensures both high luminance transmission and accurate color reproduction.
2Manufacturing precision
If the amount of coloring agent is increased to improve color saturation, then color saturation increases, but chemical resistance deteriorates
Solution Approach 1:
The patent resolves this contradiction by precisely controlling the coloring agent to binder ratio within narrow ranges (0.95 ≤ CR ≤ 1.05 for red, 0.95 ≤ CG ≤ 1.05 for green, 0.95 ≤ CB ≤ 1.05 for blue). This parameter optimization ensures sufficient color saturation while maintaining chemical resistance by preventing excessive coloring agent concentration that would compromise durability.
Solution Approach 2:
The patent applies local quality by optimizing the composition of each color filter layer individually. Each layer (red, green, blue) has its own specific coloring agent and binder ratio requirements, allowing tailored optimization of color saturation and chemical resistance for each wavelength region while maintaining overall display performance.
3Manufacturing precision
If the film thickness of color filter is increased to improve color density, then color density increases, but resolution deteriorates
Solution Approach 1:
The patent resolves this contradiction through parameter changes by controlling the product of film thickness and coloring agent ratio within specific ranges (0.05 ≤ FR×CR ≤ 0.5 for red, 0.05 ≤ FG×CG ≤ 0.5 for green, 0.05 ≤ FB×CB ≤ 0.5 for blue). This ensures adequate color density while preventing excessive thickness that would degrade resolution and manufacturing yield.
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 reproducibility and luminance, improves chemical resistance, and increases production yield by ensuring better resolution and durability of the color filters, leading to improved display performance.
Implementation Method 1
a color conversion layer containing a quantum dot
Data Source
AI summary
A liquid crystal display device containing a color filter layer, and a light-emitting device which contains a light source and a color conversion layer containing a quantum dot; wherein the color filter layer at least contains a blue color filter, a green color filter and a red color filter, as defined in the specification; an emission spectrum of light emitted from the light-emitting device has a first emission peak, a second emission peak and a third emission peak; the wavelength (λ1) of the first emission peak ranges from 420 to 480 nm, the wavelength (λ2) of the second emission peak ranges from 500 to 550 nm, and the wavelength (λ3) of the third emission peak ranges from 580 to 650 nm.