LCD Panel Conductive Layer Insulation for Signal Reliability
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Solution Overview
Problem
In existing liquid crystal display panels, the electrically-conductive layer can be electrochemically eroded due to micro-currents caused by voltage differences between the common electrode layer and the electrically-conductive layer, leading to signal transmission failures and degraded image quality.
Innovation Solution
The electrically-conductive layer is insulated from the common electrode layer using a hollow area or an insulation layer with higher resistivity, preventing micro-currents and electrochemical erosion, and ensuring reliable signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrically-conductive layer is directly connected to the common electrode layer, then electrical connection is achieved, but micro-currents cause electrochemical erosion and reliability degradation
Solution Approach 1:
An insulation layer is introduced as an intermediary between the electrically-conductive layer and the common electrode layer. This insulation layer has higher resistivity than the liquid crystal layer and prevents micro-currents from flowing between the two conductive layers, thereby eliminating electrochemical erosion while still allowing the electrically-conductive layer to perform its signal transmission function. The insulation layer acts as a mediator that blocks the harmful electrical pathway without interfering with the intended electrical connections elsewhere in the display panel.
2Stability of the object's composition
If the common electrode layer is made continuous, then uniform electrical potential is achieved, but micro-currents flow through the liquid crystal layer causing conductive layer erosion
Solution Approach 1:
The insulation layer is selectively positioned only in the region where it is needed to prevent micro-currents, specifically between the electrically-conductive layer and the common electrode layer. The common electrode layer remains continuous and provides uniform electrical potential across the display area, while the local introduction of the insulation layer prevents harmful micro-currents in specific regions without disrupting the overall electrical stability of the display panel.
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
This solution effectively prevents electrochemical erosion of the electrically-conductive layer, maintaining signal integrity and improving image quality by avoiding micro-currents between the common electrode and conductive layers.
Implementation Method 1
an insulation layer is arranged between the electrically-conductive layer and the common electrode layer... and a resistivity of the insulation layer is higher than a resistivity of the liquid crystal layer
Data Source
AI summary
A liquid crystal display panel and a display device, comprising: an array substrate, an opposite substrate arranged opposite to the array substrate, a driver circuit; a common electrode layer on a side of the opposite substrate facing the array substrate; and a liquid crystal layer located between the opposite substrate and the array substrate; the array substrate includes: a display area, a non-display area, a signal line in the display area, and a switchover terminal in the non-display area, where the switchover terminal includes: a first connection terminal electrically connected with the driver circuit, a second connection terminal electrically connected with the signal line, and an electrically-conductive layer covering the first connection terminal and the second connection terminal; the electrically-conductive layer is insulated from the common electrode layer.