Display Panel Anode Overlap Layout for Signal Interference Control
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Solution Overview
Problem
Display panels face signal interference issues due to the close proximity of signal lines to light-emitting element electrodes, affecting the display effect.
Innovation Solution
A display panel design where the first anode partially overlaps the data signal line and the body portion of the power signal line, preventing signal interference and ensuring a stable display effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If signal lines are placed close to light-emitting element electrodes, then the device complexity is reduced and area is saved, but signal interference occurs affecting display quality
Solution Approach 1:
A shielding electrode is introduced as an intermediary element between the signal line and the light-emitting element electrode. This shielding electrode acts as a mediator that blocks electromagnetic field coupling, preventing signal interference while allowing the signal line to remain in close proximity to the electrode for compact design.
Solution Approach 2:
The shielding function is extracted as a separate component (shielding electrode) from both the signal line and the light-emitting element structure. This extracted shielding element is positioned between the interfering signal line and the affected electrode, effectively isolating them while maintaining the compact overall layout.
2Object-affected harmful factors
If signal lines are positioned far from light-emitting element electrodes, then signal interference is reduced, but the device area increases and integration density decreases
Solution Approach 1:
The solution moves from a two-dimensional planar separation (increasing distance in the plane) to a three-dimensional layered approach. The shielding electrode is positioned in a different layer or depth dimension between the signal line and the light-emitting element electrode, allowing close proximity in the plane while maintaining electromagnetic isolation through vertical stacking.
3Manufacturing precision
If overlapping structure is used between anode and signal lines, then manufacturing precision is improved, but signal interference may increase without shielding
Solution Approach 1:
The shielding electrode serves as a mediator that enables the overlapping structure for manufacturing precision while preventing signal interference. By positioning the shielding electrode between the anode and signal line in the overlapping region, it blocks harmful electromagnetic coupling that would otherwise occur in the close-proximity overlapping structure.
Data Source
AI summary
A pixel driving circuit of the display panel includes a driving transistor and a data writing transistor. Signal lines include multiple data signal lines. The data writing transistor is coupled between a data signal line and a gate of the driving transistor. The signal lines also include multiple power signal lines. A power signal line includes a body portion and a connection portion. The connecting portion connects two adjacent body portions. The display panel also includes a substrate and a light-emitting element. The light-emitting element includes a first light-emitting element. The first light-emitting element includes a first anode. In a direction perpendicular to the plane in which the substrate is located, the first anode at least partially overlaps the data signal line, and the first anode at least partially overlaps the body portion.