Bezel Light-Emitting Layer Decomposes Metal Compounds
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Solution Overview
Problem
In display devices with narrow bezels, the proximity of metal signal lines to each other and the presence of water vapor lead to ionized migration and the formation of metal compounds, causing short circuits due to the electric field and water vapor interaction, which affects the display functionality.
Innovation Solution
A display panel design that includes a first light-emitting layer in the bezel area between the substrate and the wiring layer, which decomposes the metal compounds formed by the interaction of positive and negative ions, preventing their accumulation and subsequent short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the distance between adjacent signal lines in the bezel area is reduced to match narrow bezel design requirements, then the screen-to-body ratio is improved, but the risk of short circuit between signal lines increases due to ionized migration and metal compound formation
Solution Approach 1:
A light-emitting layer is introduced as an intermediary component between the substrate and the wiring layer in the bezel area. This layer emits light that decomposes metal compounds formed by ionized migration, thereby preventing short circuits while allowing signal lines to be closely spaced for narrow bezel design
Solution Approach 2:
The patent converts the harmful effect of light (which could cause display issues) into a beneficial effect by using the light-emitting layer to decompose metal compounds. The light that would otherwise be problematic is instead used to prevent short circuits by breaking down metal compounds formed due to ionized migration
2Device complexity
If metal signal lines are placed close together in the bezel area, then the device structure is simplified and bezel width is reduced, but water vapor intrusion causes ionized migration and metal compound precipitation leading to short circuits
Solution Approach 1:
The light-emitting layer serves as a protective intermediary between the metal signal lines and the harmful environment (water vapor). It actively decomposes metal compounds before they can cause short circuits, maintaining reliability while allowing simplified close-spaced wiring
Solution Approach 2:
The light-emitting layer performs preliminary protection by continuously decomposing metal compounds before they can accumulate and cause short circuits. This preventive action occurs in advance, stopping the harmful process before it leads to device failure
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 introduction of the first light-emitting layer effectively decomposes metal compounds in the bezel area, enhancing the reliability and preventing short circuits between signal lines, thus improving the display's operational stability and reliability.
Implementation Method 1
a first light-emitting layer, at least distributed in the first bezel area and, along a direction perpendicular to the substrate, disposed between the substrate and the wiring layer
Data Source
AI summary
A display panel, a method for fabrication a display panel, and a display device are provided. The display panel includes a display area, and a non-display area surrounding the display area and a first bezel area being in the non-display area; a substrate; a wiring layer, disposed on the substrate and in the non-display area, and including at least one first lead and at least one second lead, and at least a partial line segment of the at least one first lead and at least a partial line segment of the at least one second lead are disposed in the first bezel area; a polarizer disposed on a side of the wiring layer away from the substrate; and a first light-emitting layer, at least distributed in the first bezel area and, along a direction perpendicular to the substrate, disposed between the substrate and the wiring layer.