Liquid Crystal Display Alignment Layer Antioxidant Stabilization
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Solution Overview
Problem
Current liquid crystal display (LCD) technologies face challenges in reducing black afterimages due to additional reactions of reactive mesogens in the alignment layer, which affect image quality.
Innovation Solution
Incorporating reactive mesogens and antioxidants in the liquid crystal alignment layers, with specific chemical structures and concentrations, and using a method involving thermal treatment and electric-field exposure to form polymer stabilization layers, which suppress additional reactions of reactive mesogens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If reactive mesogens are included in the alignment layer to improve alignment stability, then alignment performance is improved, but additional reactions occur causing black afterimage
Solution Approach 1:
An antioxidant is introduced as an intermediary substance in the liquid crystal layer to suppress the harmful additional reactions of reactive mesogens. The antioxidant acts as a mediator that prevents the reactive mesogens from causing black afterimage while maintaining their alignment-stabilizing function, thus resolving the contradiction between alignment stability and black afterimage prevention.
Solution Approach 2:
The patent converts the harmful effect of reactive mesogen additional reactions (black afterimage) into a beneficial outcome by using the antioxidant to control and utilize these reactions. The antioxidant allows the reactive mesogens to perform their alignment function while preventing their harmful side effects, effectively turning the potential harm into a controlled process that improves overall display performance.
2Object-generated harmful factors
If antioxidant is added to suppress reactive mesogen reactions, then black afterimage is improved, but liquid crystal layer composition becomes more complex
Solution Approach 1:
The patent optimizes the concentration parameter of the antioxidant in the liquid crystal layer to achieve the desired effect with minimal complexity. By carefully controlling the antioxidant concentration, the patent suppresses black afterimage while maintaining a relatively simple liquid crystal layer composition, avoiding the need for multiple complex additives or processing steps.
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 effectively improves black afterimage quality by stabilizing the alignment of liquid crystal molecules and reducing unwanted reactions, enhancing the overall image display performance of LCDs.
Implementation Method 1
the liquid crystal layer includes an antioxidant
Implementation Method 2
forming a vertical alignment layer and a pretilt alignment stabilization layer including a polymer of the reactive mesogens on the surfaces of the first substrate and the second substrate, respectively, that face each other through an electric-field exposure process
Implementation Method 3
eluting the reactive mesogens to the liquid crystal layer through a thermal treatment
Data Source
AI summary
A liquid crystal display, including: a first substrate, and a second substrate facing the first substrate; a liquid crystal layer disposed between the first substrate and the second substrates; a first liquid crystal alignment layer disposed between the liquid crystal layer and the first substrate; and a second liquid crystal alignment layer disposed between the liquid crystal layer and the second substrate, wherein: at least one of the first liquid crystal alignment layer and the second liquid crystal alignment layer includes reactive mesogens; and the liquid crystal layer includes an antioxidant.