Display Device Column Insulation Shielding Electric Field Corrosion
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Solution Overview
Problem
The voltage difference between the connecting layer and the common electrode in liquid-crystal display panels causes corrosion and deterioration, as the electric field generated between them is not effectively shielded.
Innovation Solution
A display panel design featuring a column insulation structure between the substrates, with conductive and insulation layers arranged alternately, and a connecting layer electrically connected via through-holes, where the column insulation structure has a larger width and dielectric coefficient than the connecting layer, shielding the electric field and protecting the connecting layer from corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the connecting layer is used to supply output signals between high-voltage and low-voltage levels, then the electrical connection function is achieved, but the connecting layer deteriorates due to corrosion from voltage difference with the common electrode
Solution Approach 1:
The patent introduces a column insulation structure as an intermediary element positioned between the connecting layer and the common electrode. This insulation structure acts as a mediator that blocks the direct electric field interaction between the two conductive layers, thereby preventing corrosion of the connecting layer while maintaining the necessary electrical connection function.
Solution Approach 2:
The patent extracts the harmful electric field effect from the system by introducing the column insulation structure that selectively blocks the electric field between the connecting layer and common electrode. This allows the useful electrical connection function to remain while removing the harmful corrosion effect.
2Reliability
If the column insulation structure is added to shield the electric field, then the corrosion resistance is improved, but the device complexity increases
Solution Approach 1:
The column insulation structure is positioned locally at specific critical locations where the connecting layer interfaces with different voltage levels. Rather than providing universal insulation throughout the entire device, the solution applies insulation only where the electric field corrosion problem occurs, thereby improving reliability without unnecessarily increasing 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
The column insulation structure effectively shields the electric field, preventing corrosion and enhancing the durability of the connecting layer, thereby improving the reliability of the liquid-crystal display panel.
Implementation Method 1
The voltage difference (electric field) between the connecting layer and the common electrode may cause corrosion of the connecting layer
Implementation Method 2
The column insulation structure corresponds to the connecting layers and is formed between the first substrate and the second substrate
Data Source
AI summary
A display device includes a first substrate, a second substrate, a plurality of pixel units, a driving unit, and column insulation structure. The first substrate has a display area and a non-display area outside of the display area. The pixel units are formed at the display area of the first substrate and configured to receive an output signal. Formed at the non-display area of the first substrate, the driving unit includes first and second conductive layers, and first and second insulation layers which are alternately arranged. The connecting layer is connected between the first and second conductive layers via the through-holes formed at the first and second insulation layers. The column insulation structure corresponds to the connecting layer and is formed between the first and second substrates.