Array Substrate Plateau Protrusion ESD Tip Design
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Solution Overview
Problem
Existing display devices face issues with high discharge voltage in point discharge structures, leading to electrostatic charges being released through other means, causing damage and display abnormalities.
Innovation Solution
An array substrate with a plateau-shaped protrusion and a sharper discharge tip is designed, where the electrostatic conductive layer includes a first wire connected to a discharge tip on the side slope of the protrusion, reducing discharge voltage and facilitating efficient electrostatic discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a point discharge structure is used for ESD protection, then electrostatic discharge function is provided, but the discharge voltage is relatively high causing static electricity to be released through other ways before point discharge
Solution Approach 1:
The discharge tip is positioned on the side slope of the plateau-shaped protrusion rather than at the top, creating a localized region with enhanced electric field concentration. This local geometric modification reduces the discharge voltage at the tip while maintaining the overall ESD protection function.
Solution Approach 2:
The invention transitions from a conventional planar discharge structure to a three-dimensional plateau-shaped protrusion with a discharge tip on its side slope. This dimensional change creates a new discharge configuration that reduces voltage while maintaining protective function.
2Object-affected harmful factors
If the discharge tip is made sharper to reduce discharge voltage, then ESD protection improves, but manufacturing precision requirements increase
Solution Approach 1:
The plateau-shaped protrusion is formed in advance during the insulating layer formation process, creating a pre-positioned structure that guides the discharge tip formation. This preliminary action simplifies subsequent discharge tip fabrication and reduces manufacturing precision requirements.
Solution Approach 2:
The plateau-shaped protrusion acts as an intermediary structure between the flat insulating layer and the discharge tip. It provides a geometric foundation that naturally concentrates the electric field, reducing the need for extremely sharp tip geometry while achieving low discharge voltage.
3Reliability
If an auxiliary discharge structure is added opposite to the first discharge tip, then ESD protection reliability improves, but device complexity increases
Solution Approach 1:
The ESD protection function is divided into two independent but complementary components: the first discharge tip on the plateau side slope and the auxiliary discharge structure opposite to it. This segmentation provides multiple discharge paths, improving reliability while keeping each individual structure relatively simple.
Solution Approach 2:
The auxiliary discharge structure converts the potential harm of uncontrolled static electricity accumulation into a beneficial dual-path discharge system. By providing an alternative discharge route, it ensures that static electricity is safely released even if one discharge path is compromised.
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 sharper discharge tip effectively releases electrostatic charges, preventing line damages and display abnormalities by reducing the discharge voltage, ensuring reliable operation of display devices.
Implementation Method 1
electrostatic discharge (ESD) is a necessary means to avoid display device failure... the discharge voltage of the existing point discharge structure is relatively high... The sharper discharge tip effectively releases electrostatic charges
Data Source
AI summary
Provided are an array substrate, display panels and display devices. The array substrate includes: a base substrate; an insulating layer located on one side of the substrate and including at least one plateau-shaped protrusion, where the plateau-shaped protrusion includes a first surface and a second surface, wherein the first surface and the second surface are arranged opposite to each other along a direction perpendicular to the base substrate, the first surface is located at a side of the second surface opposite to the base substrate, and an area of the first surface is less than an area of the second surface in a direction perpendicular to the base substrate; and an electrostatic conductive layer located on a side of the insulating layer away from the substrate, where the electrostatic conductive layer includes a first wire and at least one first discharge tip electrically connected to the first wire, the first discharge tip is located on a side slope of the plateau-shaped protrusion and is located in a non-display area. The electrostatic conductive layer further includes an auxiliary discharge structure disposed opposite to the first discharge tip.