Display Pixel ESD Protection Circuit With Layered Bridge Line
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Solution Overview
Problem
Display devices face reliability issues due to static electricity, which can cause pixel circuit malfunctions and configuration problems, especially with increasing high resolution leading to higher static electricity probabilities.
Innovation Solution
Incorporation of an electrostatic discharge prevention circuit between the first power line and data lines, connected directly to the first power line and selectively to the data line through a bridge line, with the bridge line and power line in different layers and insulated, to prevent static electricity from affecting the pixel circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electrostatic discharge prevention circuit is added between the power line and data lines, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent introduces an electrostatic discharge prevention circuit as an intermediary component between the power line and data lines. This circuit includes a transistor and capacitor that act as a mediator to safely discharge static electricity accumulated on the data line to the power line, preventing direct damage to pixel circuits while maintaining system reliability.
Solution Approach 2:
The patent utilizes multi-layer wiring structure where the bridge line connecting the electrostatic discharge prevention circuit to the data line is disposed in a different layer (separated by insulating layers). This dimensional separation allows the prevention circuit to be integrated into the existing multi-layer structure without significantly increasing planar complexity or interfering with signal routing in the same layer.
2Object-affected harmful factors
If the bridge line and power line are disposed in different layers with insulating layers, then electrical insulation is improved, but manufacturing complexity increases
Solution Approach 1:
The patent employs a multi-layer wiring architecture where conductive lines are separated by insulating layers in the vertical dimension. The bridge line is disposed in one layer while the power line is in another layer, with insulating layers providing electrical isolation. This approach leverages existing multi-layer manufacturing capabilities to achieve reliable insulation without requiring complex lateral routing or additional specialized processes.
Data Source
AI summary
A display device includes a pixel. The pixel is disposed in a display area of a substrate, and is electrically connected to a first power line and a data line. An electrostatic discharge prevention circuit is disposed in a non-display area of the substrate, and is electrically connected between the data line and the first power line. The electrostatic discharge prevention circuit is electrically connected directly to the first power line, and is selectively electrically connected to the data line through a bridge line. The bridge line and the first power line are disposed in different layers with at least one insulating layer interposed therebetween.