Array Substrate ESD Protection via Conductive Pattern
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Solution Overview
Problem
Existing array substrates in liquid crystal displays have a weak ability to effectively mitigate electrostatic discharge (ESD) damages, as the ground wires at the side surfaces are insufficient in receiving and dissipating ESD, leading to potential destruction and damage within the liquid crystal panel.
Innovation Solution
Incorporating a first conductive pattern on the non-display region of the array substrate, made of transparent or non-transparent electrically conductive materials, with sharp-ended structures to enhance ESD reception and guidance, connected to a ground wire through an electrically conductive material in the via hole of the backlight module, ensuring effective ESD discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ground wire is provided at the side surface of the array substrate, then ESD can be transferred to ground, but the ground wire has weak ability of receiving ESD and cannot effectively reduce damages
Solution Approach 1:
The patent transitions from a one-dimensional side-surface ground wire to a two-dimensional conductive pattern on the light incident surface. The conductive pattern occupies the non-display region and extends into the display region, creating a larger reception area for ESD. This dimensional expansion allows the conductive pattern to intercept ESD from multiple angles and positions, significantly enhancing the ability to receive and redirect electrostatic discharge away from sensitive components.
Solution Approach 2:
The conductive pattern is designed with multiple segmented structures including a first conductive pattern in the non-display region and a second conductive pattern in the display region. These segmented conductive elements work together to form a comprehensive ESD protection network, allowing distributed reception and guidance of ESD throughout the array substrate surface.
2Reliability
If the conductive pattern is made of transparent electrically conductive material, then ESD reception is enhanced and light transmission is maintained, but manufacturing complexity increases
Solution Approach 1:
The patent specifies that the conductive pattern is made of transparent electrically conductive material with a sheet resistance of 10 to 100 ohms per square. This parameter optimization ensures sufficient electrical conductivity for effective ESD reception while maintaining transparency for light transmission. The controlled resistance range balances electrical performance and optical performance, enabling the conductive pattern to function effectively without requiring excessively thick or complex material layers.
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 conductive pattern effectively receives and guides ESD, reducing internal component damage and providing robust electrostatic protection for the display panel by ensuring ESD is directed to the ground wire, thereby enhancing the panel's resilience against electrostatic discharge.
Implementation Method 1
a first conductive pattern arranged within the non-display region of the light incident surface of the underlying substrate
Implementation Method 2
at least one outer edge of the first conductive pattern may be provided with a sharp-ended structure having a sharp end pointing towards outside of the non-display region
Data Source
AI summary
An array substrate is disclosed. The array substrate includes: an underlying substrate, a light incident surface of the underlying substrate including a display region and a non-display region surrounding the display region; and a first conductive pattern arranged within the non-display region of the light incident surface of the underlying substrate. A display panel and a display device utilizing the array substrate are also disclosed.