Display Pixel ESD Circuit Layout for Data Line Protection
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Solution Overview
Problem
Display devices are susceptible to electrostatic discharge, which can cause failures and reduce reliability and yield, particularly in the display area.
Innovation Solution
Incorporation of an electrostatic discharge circuit within the display device, comprising multiple discharge transistors connected between the driving power sources and data lines, which effectively discharge static electricity to prevent failures and enhance reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electrostatic discharge circuit is added to the display device, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent introduces an electrostatic discharge circuit as an intermediary component between the data line and ground. This circuit includes discharge transistors that act as mediators to safely transfer and dissipate static electricity away from sensitive display components, thereby protecting the display device while adding a dedicated protective subsystem
Solution Approach 2:
The electrostatic discharge circuit is designed to activate automatically when static electricity is detected on the data line, performing preliminary protective action before the static discharge can damage the display. The circuit proactively manages electrostatic threats by providing a predetermined discharge path through the discharge transistors
2Reliability
If the electrostatic discharge circuit is disposed in the display area, then reliability is improved, but the area occupied increases
Solution Approach 1:
The electrostatic discharge circuit is strategically disposed only in specific regions where electrostatic protection is most critical, such as near the data line entries or sensitive pixel circuits. This localized placement provides targeted protection to high-risk areas without requiring coverage of the entire display area, thus minimizing space consumption while maximizing protective effectiveness
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 electrostatic discharge circuit efficiently dissipates static electricity, preventing failures in the display area and improving the yield and reliability of the display device.
Implementation Method 1
an electrostatic discharge circuit disposed in the display area and disposed between the first driving power source and the data line
Data Source
AI summary
A display device includes a base layer including a display area and a non-display area, an emission unit including a first electrode electrically connected to a first driving power source, a second electrode electrically connected to a second driving power source, and a light-emitting element disposed between first and second electrodes, a first transistor including a first terminal electrically connected to the first driving power source, a second terminal electrically connected to the first electrode of the emission unit, and a gate electrode electrically connected to a first node, a second transistor including a first terminal electrically connected to a data line, a second terminal electrically connected to the first node, and a gate electrode electrically connected to a scan line, and an electrostatic discharge circuit disposed in the display area and disposed between the first driving power source and the data line.