Display Panel Shielding Layout With Through-Hole Converging Wires
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Solution Overview
Problem
Organic light-emitting diode (OLED) screens are prone to electro-static discharge (ESD) issues due to serrated edges in bottom shielding metals, which can affect the display effect and service life.
Innovation Solution
A display panel design featuring a shielding layer with converging wires electrically connected to shielding blocks, where power supply lines are connected through holes in the shielding layer, arranged to minimize the current path and reduce charge accumulation, thereby reducing the risk of ESD damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bottom shielding metals with serrated edges are used to shield pixel driving circuits, then shielding effectiveness is improved, but ESD explosions occur at tips of serrations affecting display effect
Solution Approach 1:
The shielding layer is divided into multiple shielding blocks arranged in columns, each connected to power supply lines through through-holes. This segmentation eliminates continuous serrated edges while maintaining shielding effectiveness through distributed blocking of pixel driving circuits.
Solution Approach 2:
The shielding structure transitions from a two-dimensional continuous metal layer with serrated edges to a three-dimensional structure incorporating through-holes penetrating multiple layers. This adds a vertical dimension to the shielding approach, allowing electrical connection while eliminating ESD-prone edge tips.
2Loss of energy
If converging wire is arranged along shortest distance between through holes, then current path length is minimized reducing charge accumulation, but wire layout complexity increases
Solution Approach 1:
The converging wire layout is pre-planned to follow the shortest distance path between through-holes before manufacturing. This preliminary design optimization minimizes current path length and charge accumulation while the systematic approach keeps layout complexity manageable.
3Reliability
If shielding layer uses through holes for power supply line connection, then ESD damage is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The connection structure is segmented into discrete through-holes with specific spacing and positioning. This segmentation allows for standardized manufacturing processes and reduces the cumulative precision requirements compared to continuous complex curves, while still achieving ESD protection through the distributed hole structure.
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 design effectively reduces the occurrence of ESD damage to the shielding layer, enhancing the display panel's reliability and service life by ensuring that the current path is within the boundary of the converging wire and conducted along the shortest distance, thus minimizing charge accumulation.
Implementation Method 1
a shielding layer located on the substrate and configured to shield the pixel driving circuit layer
Implementation Method 2
The plurality of power supply lines and the converging wire of the shielding layer are electrically connected to each other through a plurality of through holes
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a shielding layer, a pixel driving circuit layer located on the shielding layer and including a plurality of pixel driving circuits at least partially overlapping the shielding layer, and a power supply line electrically connected to a plurality of through holes of the shielding layer disposed in the pixel driving circuit layer. A converging line between adjacent through holes are arranged according to a shortest distance between the adjacent through holes.