Display Device Semiconductor Film Segmentation for Electrostatic Discharge
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Solution Overview
Problem
In display devices, such as liquid crystal display devices, electrostatic discharge during the etching process can cause circuit breakage due to uneven charge accumulation on wires with significantly different wiring lengths, leading to potential differences and electrostatic discharge between the gate signal line and the common connection line before the formation of a ground wire.
Innovation Solution
A display device configuration with a semiconductor film extending to overlap the ground wire, featuring separate impurity-doped semiconductor films for the gate signal line and common connection line, which are separated from each other and formed on an insulating substrate with different wiring lengths, to increase resistance and prevent electrostatic discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a ground wire is formed to dissipate static electricity, then electrostatic discharge is reduced, but circuit breakage may occur due to potential difference between wires with different lengths
Solution Approach 1:
The patent divides the semiconductor film into multiple separate regions, each positioned below different wires (gate signal line and common connection line). This segmentation prevents direct electrical connection between wires of different lengths, eliminating the potential difference that causes electrostatic discharge while maintaining static electricity dissipation capabilities.
Solution Approach 2:
The patent introduces an insulating layer between the semiconductor film regions and the wires above them. This intermediary layer allows the semiconductor film to serve as a static electricity dissipation path while preventing direct electrical contact that would create potential differences and lead to circuit breakage.
2Object-affected harmful factors
If separate semiconductor film regions are formed below different wires, then electrostatic discharge is prevented, but manufacturing complexity increases
Solution Approach 1:
The patent combines multiple semiconductor film regions into a single continuous layer structure that extends below multiple wires. While the film is continuous, it is positioned and configured to create separate functional regions below different wires, simplifying the manufacturing process compared to forming completely separate discrete film structures.
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 prevents circuit breakage by reducing electrostatic discharge during the etching process by increasing the resistance between the gate signal line and the common connection line, ensuring stable operation.
Implementation Method 1
This configuration effectively prevents circuit breakage by reducing electrostatic discharge during the etching process by increasing the resistance between the gate signal line and the common connection line
Data Source
AI summary
A display device includes a substrate, a display region, a peripheral region, an insulating layer which is disposed on a gate signal line and a conductor, a conductive layer which is disposed on the insulating layer and crosses a plurality of gate signal lines and the conductor in the peripheral region, a first semiconductor film which is disposed between the insulating layer and the conductive layer, and a second semiconductor film which is disposed between the insulating layer and the conductive layer and which is separated from the first semiconductor film. The conductive layer is connected to the plurality of gate signal lines via a plurality of diodes, and the plurality of gate signal lines are arranged in the display region and the peripheral region. A length of the conductor differs from a length of the gate signal line in the display region and the peripheral region.