TFT-LCD Static Electron Protection Circuit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Static electrons accumulating on glass substrates during TFT-LCD panel manufacturing can lead to voltage differences, causing discharges that break metal lines and result in short circuits, increasing manufacturing costs.
Innovation Solution
A liquid crystal display panel with a static-electron-protection circuit comprising diodes and a transistor, which releases static electrons from data and scan lines to common lines, preventing damage and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If glass substrates are moved and transported during manufacturing, then production efficiency is improved, but static electrons accumulate causing metal line damage
Solution Approach 1:
The patent applies preliminary anti-action by introducing a static electron protection circuit before static electrons can cause damage. The circuit proactively neutralizes accumulated static electrons on glass substrates during transportation, preventing the harmful discharge effect before it occurs. This allows continuous manufacturing while protecting metal lines from static electron damage.
2Reliability
If static electrons are released through common lines, then metal line protection is improved, but circuit complexity increases
Solution Approach 1:
The patent applies universality by making the common lines serve dual functions: their original function of transmitting common signals to liquid crystal pixels, and an additional function of serving as discharge paths for static electrons. This multi-functionality allows static electron protection without adding separate dedicated discharge lines, thereby limiting circuit complexity increase.
3Object-affected harmful factors
If static electrons discharge at metal line overlaps, then short circuits occur, but discharge position is unpredictable
Solution Approach 1:
The patent applies equipotentiality by using the common lines (which are typically connected to ground or a fixed potential) as discharge paths. When static electrons on the glass substrate discharge through the protection circuit to the common lines, they move to an equipotential state, eliminating the high voltage difference that causes unpredictable breakdown at metal line overlaps. This controlled discharge to equipotential prevents random short circuits.
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 static-electron-protection circuit effectively prevents metal line damage by releasing static electrons to common lines, thereby decreasing manufacturing costs and ensuring reliable panel production.
Implementation Method 1
When the static electrons on the glass substrates accumulate to a specific level, a great voltage difference is generated. The accumulated electrons have enough energy to leave an original position to neutralize with opposite-polarity electrons, for the electron movement is finished in a very short time. A great current is generated during the movement, causing the electrons to discharge
Data Source
AI summary
A liquid crystal display panel is disclosed. The liquid crystal display panel comprises a testing region, which comprises testing lines. The testing lines comprise data short lines and scan short lines and a static-electron-protection circuit. The static-electron-protection circuit is disposed between the testing lines and the common welding lead wires. The static-electricity-protection circuit is used to release the static electrons generated on the data lines or the scan lines through the common lines, when static electrons during the liquid crystal display manufacturing process of the data lines or the scan lines are generated.