Electro-optical Device Relay Electrode Crosstalk Reduction
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Solution Overview
Problem
In organic electro-luminescence (EL) panels, the miniaturization of components leads to a narrowing interval between the relay node and the power supply line, resulting in parasitic capacitors that cause crosstalk and image flicker due to potential changes in the gate transistor.
Innovation Solution
An electro-optical device design with a relay electrode connected to the gate electrode of the driving transistor, a power supply line at the same layer, and a conductive member between the relay electrode and power supply line, providing a constant potential to reduce parasitic capacitors and crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If miniaturization of panel progresses, then device size is reduced, but parasitic capacitor is generated between relay node and power supply line causing crosstalk
Solution Approach 1:
A conductive member is introduced as an intermediary between the relay node and the power supply line. This conductive member is electrically connected to a potential source and serves to shield the relay node from the power supply line, thereby preventing parasitic capacitor formation and crosstalk while allowing miniaturization to proceed
2Area of stationary object
If interval between relay node and power supply line becomes narrow, then area is reduced, but parasitic capacitor is generated causing image flicker
Solution Approach 1:
The conductive member acts as a shielding intermediary placed between the relay node and power supply line, preventing the generation of parasitic capacitors that would cause image flicker, thus allowing narrow spacing without harmful effects
Solution Approach 2:
The conductive member is electrically connected to a potential source to maintain equipotential conditions between the relay node and power supply line, eliminating potential differences that would otherwise create parasitic capacitors and image flicker
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 configuration effectively shields the relay electrode from the power supply line, reducing crosstalk and suppressing image flicker, thereby enhancing the stability and quality of image output in organic EL panels.
Implementation Method 1
a conductive member provided between the relay electrode and the power supply line in plan view and supplied with a constant potential
Data Source
AI summary
An electro-optical device includes a light-emitting element including a first electrode, a light-emitting layer, and a second electrode, a driving transistor provided corresponding to the light-emitting element, a relay electrode electrically coupled to a gate electrode of the driving transistor and provided at a layer between the gate electrode and the first electrode of the light-emitting element, a power supply line provided at the same layer as that of the relay electrode, extending in a first direction in plan view, and electrically coupled to the first electrode of the light-emitting element, and a conductive member provided between the relay electrode and the power supply line in plan view and supplied with a constant potential.