LCD Common Wire Test Wire Connection Structure
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Solution Overview
Problem
Adhesive defects in the silver paste dot pattern of liquid crystal display (LCD) devices lead to unstable common voltage application, resulting in deterioration of image quality.
Innovation Solution
Incorporating a test wire adjacent to the common wire with a wire connection electrode to ensure a uniform width and stable connection, allowing for improved adhesive strength and consistent voltage application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a silver paste dot pattern is used to ground the common electrode, then electrical conductivity and adhesive property are provided, but adhesive defects frequently occur leading to unstable common voltage
Solution Approach 1:
The patent extracts and eliminates the silver paste dot pattern from the manufacturing process. By removing this problematic element that causes adhesive defects, the invention achieves stable common voltage application without the reliability issues associated with silver paste adhesion to the thin film transistor substrate.
Solution Approach 2:
The common wire is designed to serve multiple functions: it provides electrical connection for common voltage application, acts as a grounding path, and eliminates the need for separate silver paste dot patterns. This multi-functional design improves reliability while simplifying the structure.
2Reliability
If a silver paste dot pattern is used to connect the common electrode, then electrical conductivity is achieved, but the manufacturing process becomes more complex
Solution Approach 1:
The invention removes the silver paste dot pattern from the manufacturing process, thereby reducing process complexity. The electrical conductivity function is transferred to the common wire structure, which is integrated into the existing thin film transistor substrate without requiring additional silver paste application steps.
Solution Approach 2:
The patent merges the grounding function and electrical connection function into the common wire structure itself. By combining these functions into a single integrated element formed through standard thin film processes, the manufacturing complexity is reduced while maintaining electrical conductivity.
3Reliability
If the common electrode is grounded through silver paste dot pattern, then voltage application is enabled, but image quality deteriorates due to unstable common voltage
Solution Approach 1:
By extracting and removing the silver paste dot pattern from the system, the invention eliminates the source of voltage instability. The common wire provides a stable electrical path without the adhesion problems that caused common voltage fluctuations and subsequent image quality deterioration.
Solution Approach 2:
The invention uses a common wire structure that replicates the electrical connection function of the silver paste dot pattern but with superior stability. The common wire provides consistent electrical contact throughout operation, ensuring stable common voltage and maintaining image quality.
Data Source
AI summary
Disclosed is a LCD device having a structure capable of improving the quality of images is disclosed. The LCD device includes, an image display portion composed of pixels, the image display portion defined by the crossing of gate wires and data wires; a common wire located on the outside of the image display portion; a test wire located adjacent to a part of the common wire; and a wire connection electrode for connecting the common wire with the test wire.