LCD Panel Black Matrix Shading Prevention via UV Polymerization
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Solution Overview
Problem
The light shielding property of the black matrix in liquid crystal display panels interferes with the formation of functional layers during ultraviolet irradiation, leading to uneven alignment and light leakage issues in polymer liquid crystal and self-aligned liquid crystal technologies.
Innovation Solution
The manufacturing method involves forming the black matrix on the side of the color filter substrate away from the thin film transistor substrate, allowing for irradiation of the liquid crystal cell with ultraviolet light before the black matrix is fabricated, and using a photomask to ensure uniform polymerization of reactive monomers and formation of self-aligning layers or polymer walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the black matrix is formed on the color filter substrate before ultraviolet irradiation, then the black matrix can prevent light leakage, but the light shielding property of the black matrix interferes with the formation of functional layers during ultraviolet irradiation
Solution Approach 1:
The patent applies preliminary action by performing ultraviolet irradiation to form functional layers (alignment layers or polymer walls) before forming the black matrix. This sequence ensures that the ultraviolet light can uniformly irradiate the liquid crystal layer without being blocked by the black matrix, thereby achieving uniform alignment while maintaining the light leakage prevention function of the black matrix when formed subsequently.
2Stability of the object's composition
If the black matrix is formed early in the process, then the structure is stable, but ultraviolet light cannot reach areas corresponding to the black matrix to form stable polymer alignment layers
Solution Approach 1:
The patent performs ultraviolet irradiation to form stable polymer alignment layers before forming the black matrix. This preliminary action ensures that the alignment layers are created when ultraviolet light can fully reach the liquid crystal layer, resulting in reliable and stable alignment layers that maintain their function even after the black matrix is subsequently formed.
3Ease of operation
If traditional PI alignment film is used, then alignment function is provided, but the materials have high polarity and high water absorption, storage and transportation easily facilitate deterioration
Solution Approach 1:
The patent changes the material parameters by replacing traditional polyimide (PI) alignment films with self-aligning liquid crystal materials that have low polarity and low water absorption. This parameter change maintains the alignment function while significantly improving material stability during storage and transportation, preventing deterioration and ensuring uniform phase distribution.
Solution Approach 2:
The patent uses composite materials by combining self-aligning liquid crystal materials with reactive monomers that can be polymerized under ultraviolet light. This composite approach creates a material system that provides both alignment function and enhanced stability, eliminating the deterioration issues associated with traditional PI materials while maintaining effective alignment performance.
4Productivity
If self-alignment liquid crystal technology is used, then cost is saved and efficiency is improved, but the black matrix still causes shading during ultraviolet irradiation
Solution Approach 1:
The patent maintains the efficiency benefits of self-alignment liquid crystal technology by performing ultraviolet irradiation before forming the black matrix. This preliminary action ensures uniform alignment layer formation without the shading interference caused by the black matrix, thereby achieving both high productivity and manufacturing precision in the cell process.
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
This approach prevents shading by the black matrix, enabling uniform alignment and reducing light leakage, thereby improving the display quality and efficiency of liquid crystal display panels.
Implementation Method 1
irradiating the liquid crystal cell with ultraviolet light, and reacting the reactive monomers in the liquid crystal material under irradiation of ultraviolet light to obtain a functional liquid crystal layer
Implementation Method 2
refract light of the backlight module to produce a picture
Data Source
AI summary
The present invention provides a manufacturing method of a liquid crystal display (LCD) panel and the LCD panel. A thin film transistor (TFT) substrate and a color filter (CF) substrate are first bonded, a liquid crystal material is enclosed between the TFT and CF substrates to obtain a liquid crystal cell, which is then irradiated with ultraviolet light to obtain a functional liquid crystal layer, and finally a black matrix is formed on a side of the CF substrate away from the TFT substrate. By changing the structure of the existing LCD panel, the present invention prevents the shading of the black matrix that affects functional liquid crystal layer production. It is advantageous for a polymer liquid crystal technology, a self-aligned liquid crystal technology, and the like to realize a technique of forming a specific functional layer by irradiating the liquid crystal cell with ultraviolet light.