Display Pad Protection Circuits for Electrostatic Discharge
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Solution Overview
Problem
Display devices are vulnerable to damage from static electricity, which can cause internal circuit malfunctions or damage due to the flow of static electricity from external sources.
Innovation Solution
A display device with a static electricity protection circuit is designed, featuring a first and second protection circuit connected to data and gate lines respectively, utilizing transistors with different electrode spacings and widths to effectively discharge static electricity, thereby protecting the internal circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static electricity protection circuits are added to protect internal circuits, then reliability against static electricity is improved, but device complexity increases
Solution Approach 1:
The patent introduces protection circuits as intermediary elements between the pads and the internal circuits (pixels and gate driver). These protection circuits act as mediators that intercept and discharge static electricity before it can reach and damage the internal circuits, thus protecting the system without requiring fundamental changes to the existing circuit architecture.
Solution Approach 2:
The protection circuit is divided into two separate segments: a first protection circuit connected to the data line and pixel, and a second protection circuit connected to the gate control line and gate driver. Each segment is designed with different electrode spacings tailored to the specific protection needs of the connected component, allowing optimized protection without requiring a complete redesign of the entire system.
2Reliability
If different electrode spacings are used in protection circuits for different lines, then protection effectiveness is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies the principle of local quality by configuring the first protection circuit with a first electrode spacing and the second protection circuit with a second electrode spacing, where the spacings are optimized for their respective protection needs. The first protection circuit (for data line) has different spacing characteristics than the second protection circuit (for gate control line), allowing each to be tuned for maximum effectiveness at its specific location in the circuit.
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 optimized static electricity protection circuit significantly reduces the risk of damage from static electricity, ensuring the reliability and longevity of the display device by effectively discharging static electricity introduced through pads.
Implementation Method 1
the protection circuit may be configured to receive a signal in the form of a pulse to discharge static electricity introduced into the pads
Data Source
AI summary
A display device according to one or more embodiments of the disclosure includes a pixel on a base layer; a gate driver configured to supply a gate control signal to the pixel through a gate line; pads including a first pad on the base layer and electrically connected to the pixel through a data line and a second pad on the base layer and electrically connected to the gate driver; and a protection circuit electrically connected to the pads. The protection circuit includes a first protection circuit electrically connected between the first pad and the pixel and a second protection circuit electrically connected between the second pad and the gate driver. The first protection circuit and the second protection circuit have different structures.