Electrostatic Resistant Layer for Display Substrate Static Dissipation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
During the manufacturing process of thin film transistor liquid crystal displays (TFT-LCDs), electrostatic charges are easily generated on the outer surface of display substrates due to friction with rollers, leading to damage of functional film layers and inaccurate signal transmission, as insulating glass substrates fail to effectively discharge these charges.
Innovation Solution
A base substrate with a stacked structure comprising a first base layer and an electrostatic resistant layer, where the electrostatic resistant layer is made of conductive or antistatic materials, is used to contact the rollers, preventing electrostatic charge accumulation and reducing friction-generated charges, thereby protecting the functional film layers and improving production yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insulating glass substrates are used for display substrates, then electrical insulation is improved, but electrostatic charge discharge capability deteriorates
Solution Approach 1:
The base substrate is segmented into two functional layers: an insulating glass base layer for electrical insulation and a conductive electrostatic resistant layer for charge discharge. This segmentation allows each layer to perform its specialized function without compromising the other.
Solution Approach 2:
The invention creates a composite substrate structure combining insulating glass material with conductive material (such as ITO or antistatic coating). This composite structure simultaneously provides both electrical insulation from the glass and electrostatic discharge capability from the conductive layer.
2Productivity
If display substrates are transferred through rollers, then manufacturing efficiency is improved, but electrostatic charge generation worsens
Solution Approach 1:
The invention converts the harmful electrostatic charges generated by roller friction into a beneficial situation by providing a dedicated conductive layer that safely dissipates these charges. The roller contact that generates static electricity also ensures good contact with the conductive layer for charge discharge.
Solution Approach 2:
The electrostatic resistant layer acts as an intermediary between the roller and the functional film layers. It mediates the electrostatic interaction by providing a controlled discharge path, preventing direct charge accumulation that would harm the functional layers.
3Device complexity
If electrostatic charges are not discharged, then manufacturing process simplicity is improved, but functional film layer damage worsens
Solution Approach 1:
The conductive electrostatic resistant layer is applied in advance during substrate manufacturing, before the functional film layers are deposited. This preliminary action ensures that charge discharge capability is built into the substrate structure itself, preventing future damage without requiring additional complex discharge equipment.
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 electrostatic resistant layer effectively prevents electrostatic charge buildup on the display substrate, reducing damage to functional film layers and extending the service life of the display device by ensuring accurate signal transmission and reduced friction-induced charge generation.
Implementation Method 1
an electrostatic resistant layer that are disposed in a stack... the electrostatic resistant layer includes a second base layer and an electrostatic resistant material dispersed in the second base layer... the electrostatic resistant material includes at least one of a conductive material or an antistatic material
Data Source
AI summary
A base substrate includes a first base layer and an electrostatic resistant layer that are disposed in a stack.