Liquid Crystal Display Seal Line Conductive Ball Ion Attraction
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Solution Overview
Problem
Liquid crystal display devices often develop spots on their edges due to the reaction between sealant ion impurities and the alignment layer, which is not effectively addressed by existing improvements in materials.
Innovation Solution
Incorporating a conductive ball within the seal line that receives a common voltage, attracting ion impurities from the liquid crystal layer to the seal line's surface via an electric field, thereby preventing their reaction with the alignment layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sealant and alignment layer materials are improved, then spot formation is reduced, but device complexity increases due to material individuality and mass-production challenges
Solution Approach 1:
The patent extracts the harmful ion impurities from the liquid crystal layer by attracting them to the seal line using an electric field generated by the common voltage line, separating the impurities from the alignment layer to prevent spot formation without changing material compositions
Solution Approach 2:
The common voltage line acts as an intermediary element that generates an electric field to attract ion impurities to the seal line, serving as a mediator between the power source and the liquid crystal layer to prevent harmful reactions without direct material contact
2Reliability
If common voltage line is added to attract ion impurities, then spot formation is prevented, but device complexity increases due to additional voltage lines and conductive balls
Solution Approach 1:
The common voltage line serves multiple functions: it provides the common voltage to the common electrode for liquid crystal operation and simultaneously generates an electric field to attract ion impurities to the seal line, making the same structure perform both driving and protective functions
Solution Approach 2:
The patent combines the common voltage line function with the ion attraction function, merging the protective role into the existing common voltage line structure rather than adding a separate protective element, thereby reducing overall device complexity
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 prevents the formation of spots on the edge of liquid crystal display devices by holding ion impurities away from the alignment layer, maintaining image quality and device performance.
Implementation Method 1
attaches ion impurities of the liquid crystal layer to a surface of the seal line according to an electric field formed when the common voltage is applied
Data Source
AI summary
A liquid crystal display device is disclosed. The liquid crystal display device includes: a first substrate, a second substrate facing the first substrate, a liquid crystal layer disposed between the first and second substrates, the liquid crystal layer including liquid crystal molecules and ionic impurities originated from a wall defining the liquid crystal layer, a common voltage line, formed on an outer area of the first substrate, a common electrode formed on the second substrate, and a seal line formed to cover the common voltage line the seal line including a conductive ball configured to attract ionic impurities toward a surface of the seal line when a polarized voltage is applied to the conductive ball.