LCD Panel Inner Shorting Line and Common Potential Line Design
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Solution Overview
Problem
High power consumption and flicker issues in high-definition liquid crystal display panels due to electrostatic damage and wiring resistance variations, which affect display quality and production yield.
Innovation Solution
Incorporating thicker inner shorting lines and common potential lines with multiple electrostatic protection circuits, including diodes or transistors, to bundle and connect scan and picture lines, reducing leakage current and wiring resistance, and using contact holes to enhance electrical connectivity and spacing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrostatic protection circuits are added to prevent electrostatic damage, then reliability is improved, but power consumption increases due to leakage current
Solution Approach 1:
The patent extracts and separates the electrostatic protection function from the main signal transmission path by using dedicated protection circuits connected through contact holes, allowing the protection function to operate independently without continuously affecting power consumption of the display circuitry
Solution Approach 2:
The patent introduces contact holes as intermediary structures that provide controlled electrical connection between different layers for electrostatic protection, enabling selective discharge paths that minimize continuous current flow while maintaining protection capability
2Manufacturing precision
If thicker lines are used for shorting lines and common potential lines, then wiring resistance is reduced and flicker is minimized, but manufacturing complexity increases
Solution Approach 1:
The patent applies different line thicknesses to different wiring layers based on their specific functional requirements - thicker lines for shorting lines and common potential lines that require low resistance, and standard thickness for scan and picture lines, optimizing both electrical performance and manufacturing feasibility
Solution Approach 2:
The patent resolves the complexity issue by implementing the multi-thickness line design across different vertical layers (using contact holes to connect layers) rather than varying thickness within a single layer, simplifying the manufacturing process while achieving the desired electrical characteristics
3Reliability
If multiple electrostatic protection circuits are implemented with contact holes, then electrostatic damage prevention is enhanced, but device complexity increases
Solution Approach 1:
The patent nests the electrostatic protection circuits within the existing multi-layer structure of the liquid crystal display panel, utilizing contact holes that pass through insulating layers to connect different conductive layers, thereby integrating protection functionality without adding external structural complexity
Solution Approach 2:
The patent incorporates electrostatic protection circuits during the manufacturing process itself, forming contact holes and conductive layers simultaneously with the main display structure, so that protection is built-in from the beginning rather than added as a separate post-processing step
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 solution results in a liquid crystal display panel with low power consumption, reduced flicker, and improved display quality by minimizing current flow and voltage variations, while effectively preventing electrostatic damage.
Implementation Method 1
electrostatic damage such as breakage of the TFTs formed on the substrate, and short-circuits caused between wiring lines, will occur
Data Source
AI summary
In an active matrix type liquid crystal display panel of the invention, an inner shorting line that is thicker than the scan lines and picture lines is disposed so as to surround the periphery of a display area included in the liquid crystal display panel; the scan lines are each connected to first electrostatic prevention circuits and bundled by a first shorting wire; the first shorting wire is connected to the inner shorting line via at least one among second electrostatic prevention circuits; a common potential line that is thicker than the inner shorting line is disposed around the outer periphery of the inner shorting line; and at least one connection is provided between the inner shorting line and common potential line, electrically connecting each to the other.