Shield Electrode Layout for Display Signal Interference
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Solution Overview
Problem
Display devices suffer from noise caused by signal interference between driving signals for the display panel and sensing parts, which affects image quality.
Innovation Solution
Incorporating a shield electrode at the same level as the first electrode, overlapping and extending along the data line, and connected to the second electrode, to reduce signal interference between the data lines and sensing parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If data lines and sensing parts are disposed close to each other for compact device layout, then device integration is improved, but signal interference noise increases
Solution Approach 1:
A shield electrode is introduced as an intermediary component between the data line and the sensing part. The shield electrode is disposed at the same level as the first electrode of the light emitting element and overlaps the data line when viewed in plan, creating a physical barrier that blocks electromagnetic field interference while maintaining compact device layout.
Solution Approach 2:
The shield electrode is positioned in the vertical stacking direction at the same level as the first electrode, creating a new spatial dimension for interference protection. This layered arrangement allows the shield electrode to overlap the data line in plan view while maintaining proper electrical connections and spacing in the vertical dimension.
2Object-affected harmful factors
If shield electrode is added to reduce signal interference, then noise reduction is improved, but device structure complexity increases
Solution Approach 1:
The shield electrode is merged with the existing electrode structure of the light emitting element. Specifically, the shield electrode is connected to the second electrode (cathode) of the light emitting element, combining the shielding function with the existing electrical connection infrastructure and reducing the need for separate shielding structures.
Solution Approach 2:
The second electrode of the light emitting element serves dual functions: as the cathode for light emission and as the connection point for the shield electrode. This multi-functional design allows the same structural element to provide both lighting functionality and electromagnetic shielding, reducing 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 shield electrode effectively minimizes noise caused by signal interference, enhancing the image quality and stability of the display device.
Implementation Method 1
a shield electrode disposed at a level the same as a level of the first electrode. When viewed in a plan, the shield electrode overlaps the data line and extend along the data line
Data Source
AI summary
Disclosed is a display device including a transistor, a light emitting element disposed on the transistor and including a first electrode, a second electrode on the first electrode, and an emission layer between the first electrode and the second electrode, a data line spaced apart from the light emitting element, and a shield electrode disposed at a same level of the first electrode. When viewed in a plan view, the shield electrode overlaps the data line and extends along the data line.