Color Filter Substrate with Quantum Dot Conversion and Wire Grid Polarizer
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Solution Overview
Problem
Existing liquid crystal display panels with conventional color film substrates suffer from low light efficiency, narrow color gamut, and small viewing angle due to the use of white backlight modules and conventional color film layers.
Innovation Solution
A color filter substrate is designed with a base substrate, a color conversion layer, a covering layer, a buffer layer, a polarizing layer, and a protective layer, including quantum dot structures and filter structures that convert blue light into red and green light, enhancing light efficiency and color gamut, and a wire grid polarizer for improved transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional color film layer is used with a white backlight module, then the display panel can achieve basic color display, but the light efficiency is low and the color gamut is narrow
Solution Approach 1:
The patent changes the material parameters of the color film layer by introducing quantum dot structures with specific size ranges (5-50 nm) and composition ratios. By controlling the quantum dot size and material composition (CdSe, ZnS, etc.), the optical properties are optimized to achieve higher light efficiency and broader color gamut while maintaining a relatively simple layer structure.
Solution Approach 2:
The patent employs composite material structures by combining quantum dot layers with color filter layers, encapsulation layers, and different material compositions (CdSe core with ZnS shell). This composite approach enables the system to achieve superior optical performance including enhanced light efficiency and expanded color gamut coverage compared to conventional single-material color film layers.
2Adaptability or versatility
If a conventional color film layer is used with a white backlight module, then the display panel can achieve basic color display, but the viewing angle is small
Solution Approach 1:
The patent optimizes the quantum dot size parameters (5-50 nm range) and material composition to improve light emission characteristics and viewing angle performance. By adjusting these parameters, the display achieves broader viewing angles while maintaining a relatively simple color film layer structure without requiring complex multi-layer configurations.
3Illumination intensity
If quantum dot structures are introduced to improve color gamut and light efficiency, then the color representation is enhanced, but the device complexity increases
Solution Approach 1:
The patent controls quantum dot size within 5-50 nm and adjusts material composition ratios to optimize optical performance. This parameter control enables high light efficiency and color gamut achievement without requiring excessively complex layer structures or multiple processing steps.
Solution Approach 2:
The patent applies local quality enhancement by introducing quantum dot structures specifically in regions where color conversion is needed, rather than uniformly complicating the entire display structure. The quantum dots are positioned in the color film layer where they can locally convert wavelengths to achieve enhanced color gamut and light efficiency.
4Adaptability or versatility
If quantum dot structures are introduced to improve color gamut and light efficiency, then the color representation is enhanced, but the device complexity increases
Solution Approach 1:
The patent optimizes quantum dot size parameters (5-50 nm) and material composition to simultaneously improve viewing angle and maintain structural simplicity. By carefully controlling these parameters, the display achieves broader viewing angles without requiring complex multi-layer configurations or additional components.
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 significantly improves light efficiency and color gamut, allowing for a larger viewing angle and better color representation in display panels by effectively converting blue light into red and green light, while maintaining high transmittance.
Implementation Method 1
a color conversion layer, a covering layer on a side of the color conversion layer away from the base substrate
Data Source
AI summary
A color filter substrate, a display panel and a display device are provided. The color filter substrate includes: a base substrate; a color conversion layer on the base substrate; a covering layer on a side of the color conversion layer away from the base substrate; and a polarizing layer on a side of the covering layer away from the base substrate. The polarizing layer includes a wire grid polarizer. The covering layer includes a first covering sub-layer and a second covering sub-layer, the first covering sub-layer is located on the side of the color conversion layer away from the base substrate, the second covering sub-layer is located on a side of the first covering sub-layer away from the base substrate, and a material of the first covering sub-layer is different from a material of the second covering sub-layer.