Liquid Crystal Display Electrode for Impurity Ion Trapping
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Solution Overview
Problem
During the cell assembling process of liquid crystal displays, impurity ions from the sealant can contaminate the liquid crystal, leading to deteriorated display quality, particularly image sticking issues around the effective display area.
Innovation Solution
A metal electrode is formed between the edge portion of the array substrate and the sealant, connected to a first DC power, creating an electric field that attracts and traps impurity ions, preventing them from entering the display region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealant is pre-cured with UV to prevent pollution to the liquid crystal, then the liquid crystal can be protected from impurity ions, but some impurity ions may still enter into the effective display region and deteriorate display quality
Solution Approach 1:
The patent applies preliminary action by forming an electrode structure between the array substrate and sealant before liquid crystal filling. This electrode creates an electric field that preemptively prevents impurity ions from entering the effective display region, addressing the limitation of UV pre-curing which only partially prevents pollution.
Solution Approach 2:
The patent introduces an electrode as an intermediary element between the array substrate and sealant. This electrode mediates the interaction by creating an electric field that repels impurity ions, providing an additional protective mechanism beyond UV pre-curing.
2Ease of manufacture
If UV pre-curing is applied to the sealant before liquid crystal contact, then the sealant is partially cured to reduce impurity release, but complete pollution prevention is not achieved
Solution Approach 1:
The patent employs a composite approach by combining UV pre-cured sealant with an electrode-based electric field protection system. This composite solution addresses the insufficiency of UV pre-curing alone by adding a physical barrier mechanism through the electrode structure.
3Object-affected harmful factors
If impurity ions from the sealant enter the liquid crystal, then the liquid crystal becomes polluted, but the pollution can be prevented by creating an electric field with an electrode
Solution Approach 1:
The patent applies multi-functionality by designing the electrode to serve dual purposes: it acts as both a structural component of the display device and a protective element that creates an electric field to repel impurity ions. This eliminates the need for separate protection mechanisms.
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 solution effectively reduces line image sticking and improves display quality by preventing impurity ion pollution, ensuring cleaner liquid crystals and enhanced image clarity.
Implementation Method 1
an electrode is formed between an edge portion of an effective display region of the array substrate and the sealant, and the electrode is connected to a first DC power... an electric field and thus a voltage difference are formed between the electrode and the common electrode
Implementation Method 2
the impurity ions in the sealant that enter into the electric field regions can be attracted by the electrode, which prevents the pollution of the liquid crystal caused by the impurity ions
Data Source
AI summary
The embodiments of the present invention disclose a liquid crystal display. The liquid crystal display comprises: a color filter substrate and an array substrate assembled together with a sealant, wherein an electrode is formed between an edge portion of an effective display region of the array substrate and the sealant, and the metal electrode is connected to a first DC power.