COA LCD Panel Quantum Rod Color Filter Eliminates Lower Polarizer
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Solution Overview
Problem
Current liquid crystal display panels face issues with poor alignment between the color filter and TFT substrates, leading to pixel light leakage and low aperture ratio, which are exacerbated by the need for a lower polarizer in traditional backlight-type LCDs, increasing fabrication costs and complexity.
Innovation Solution
A COA type liquid crystal display panel is fabricated using reactive liquid crystals, reactive monomers, red quantum rods, and green quantum rods to form a color filter thin film that transforms backlight into polarized light, eliminating the need for a lower polarizer and enhancing color saturation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lower polarizer is used in traditional backlight-type LCDs, then the display can achieve proper polarization control, but the fabrication cost and device complexity increase
Solution Approach 1:
The patent extracts and eliminates the lower polarizer from the traditional LCD structure by integrating polarization functionality directly into the color filter layer. The color filter layer is designed to simultaneously perform color filtering and polarization control, removing the need for the separate lower polarizer component and simplifying the overall device structure.
Solution Approach 2:
The patent merges the functions of the color filter layer and lower polarizer into a single integrated layer. The color filter layer is designed with specific optical properties that enable it to both filter colors and control polarization, combining multiple functions into one component to reduce fabrication complexity.
2Illumination intensity
If quantum dots are used to enhance color saturation, then the display achieves brighter and more saturated colors, but the fabrication process becomes more complex
Solution Approach 1:
The patent combines quantum dot incorporation with the color filter layer fabrication process. Quantum dots are integrated directly during the color filter layer deposition or patterning steps, allowing simultaneous achievement of color saturation enhancement without requiring separate quantum dot processing steps that would increase fabrication complexity.
3Manufacturing precision
If the color filter layer is prepared on the TFT substrate (COA structure), then alignment issues between CF substrate and TFT substrate are eliminated, but the fabrication process requires precise control of reactive liquid crystals and quantum rods
Solution Approach 1:
The patent utilizes parameter changes in the reactive liquid crystal system to achieve precise alignment. By controlling the chemical composition, concentration, and reaction conditions of the reactive liquid crystals and monomers, the fabricability process achieves precise alignment of quantum rods and color filter features without requiring complex mechanical alignment procedures.
Solution Approach 2:
The patent replaces mechanical alignment processes with chemical self-assembly mechanisms. The reactive liquid crystals and quantum rods self-align through chemical interactions and molecular orientation during the polymerization process, eliminating the need for complex mechanical alignment equipment and procedures while achieving high manufacturing precision.
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 method achieves higher color saturation and reduces fabrication costs by generating polarized light through the arrangement of quantum rods, thereby improving the display's aperture ratio and simplifying the manufacturing process.
Implementation Method 1
performing UV irradiation to the plurality of sub pixel regions, allowing the reactive monomers react with the reactive liquid crystals in each the sub pixel region to form a polymer network
Implementation Method 2
the color filter thin film can transform the backlight into polarized light
Data Source
AI summary
The present application provides a method of fabricating a COA type liquid crystal display panel and the COA type liquid crystal display panel, which utilizes reactive liquid crystal, reactive monomers, red quantum-rods and green quantum-rods to fabricate a color filter thin film. Due that light generated by the red and green quantum rods in the color filter thin film when they are excited are polarized light, and the red and green quantum rods therein are arranged along the same direction, the excited red and green quantum rods generate red and green linear polarized light conforming to the polarized direction so as to play a role of a lower polarizer and to allow the COA type liquid crystal display panel fabricated by the method not only obtain bright trichromatic light for increasing color saturation, but also omit the lower polarizer for reducing fabrication cost.