LCD Light Converting Layer for Color Rendition
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Solution Overview
Problem
Liquid crystal display devices face challenges in achieving optimal color rendition and panel transmittance due to limitations in light conversion and filtering, leading to subpar visual effects and contrast ratios.
Innovation Solution
Incorporation of a light converting layer and a color filter layer in the liquid crystal display device, where the light converting layer uses fluorescent color blocks and quantum dots to convert incident light wavelengths, and the color filter layer filters light to enhance color purity, combined with a black matrix layer to reduce interference, thereby improving color rendition and transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional backlight module and liquid crystal display module are used, then the device structure is simple, but the color rendition and panel transmittance are subpar
Solution Approach 1:
The patent segments the light modulation function into distinct layers: a light converting layer with fluorescent color blocks for wavelength conversion, a color filter layer with red, green, and blue filter blocks for color purification, and a black matrix layer for light blocking. This segmentation allows each layer to specialize in a specific function, achieving superior color rendition and transmittance while maintaining a manageable overall structure.
Solution Approach 2:
The patent employs composite material structures by combining fluorescent materials in the light converting layer with traditional color filter materials in the color filter layer. The fluorescent color blocks convert backlight wavelengths to match the transmission bands of the color filters, creating a composite system that optimizes both color accuracy and light efficiency.
2Illumination intensity
If the light converting layer and color filter layer are added, then the color rendition and transmittance are improved, but the device complexity increases
Solution Approach 1:
The patent merges the light conversion function and color filtering function into a single integrated light modulation assembly. The light converting layer and color filter layer are positioned adjacent to each other in the light path, combining multiple optical functions into one compact structure rather than requiring separate components, thus improving transmittance without proportionally increasing complexity.
Solution Approach 2:
The color filter layer serves multiple functions: it filters specific wavelengths to enhance color purity, it works in conjunction with the light converting layer to optimize color rendition, and it contributes to the overall light modulation efficiency. This multi-functionality reduces the need for additional separate components.
3Manufacturing precision
If the light converting layer uses fluorescent color blocks and quantum dots, then the color purity is enhanced, but the manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by using fluorescent color blocks with specific emission characteristics in different regions of the light converting layer. Each fluorescent color block is positioned to correspond with its matching color filter block, creating localized optical pathways that maximize color purity while maintaining manufacturability through region-specific material selection.
4Illumination intensity
If the black matrix layer is added to reduce interference, then the contrast ratio is improved, but the device complexity increases
Solution Approach 1:
The black matrix layer converts potentially harmful stray light and optical interference into beneficial contrast enhancement. By strategically positioning the black matrix layer to block unwanted light paths while allowing desired light to pass through the color filter blocks, the patent transforms light interference problems into contrast improvement benefits.
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 achieves improved color rendition, high contrast ratios, and enhanced panel transmittance by effectively converting and filtering light, resulting in superior visual performance.
Implementation Method 1
the light converting layer uses fluorescent color blocks and quantum dots to convert incident light wavelengths
Implementation Method 2
the color filter layer filters light to enhance color purity
Data Source
AI summary
A liquid crystal display device comprises a backlight module and a liquid crystal display module in a light emitting path of the backlight module. The liquid crystal display module includes a first conductive substrate facing the backlight module, a second conductive substrate spaced apart from the first conductive substrate, and a liquid crystal layer sandwiched between the first conductive substrate and the second conductive substrate. The second conductive substrate includes a transparent substrate, a color filter layer formed on the transparent substrate, and a light converting layer formed on the color filter layer, and a transparent conductive layer formed on the light converting layer.