Antistatic Circuit with Floating Control Electrode for Display
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Solution Overview
Problem
Current antistatic circuits in displays fail to effectively prevent low-voltage static electricity from entering the substrate, and they cannot be downsized to accommodate high pixel-definition and frame-region design requirements.
Innovation Solution
The implementation of an antistatic circuit with a floating control electrode and a capacitance configuration where the capacitance between the control electrode and the signal or scanning wire is larger than the capacitance between the control electrode and the common wire, allowing the circuit to operate under low-voltage static electricity and eliminate the need for additional wiring, thereby downsizing the circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an antistatic circuit with two diode-connected MOS transistors is used, then static electricity protection is provided, but the circuit area becomes large
Solution Approach 1:
The invention extracts and eliminates the gate wire connection to the control electrode, making it a floating electrode. This removes unnecessary wiring and reduces circuit area while maintaining the antistatic protection function through the capacitance ratio mechanism.
Solution Approach 2:
The control electrode serves multiple functions: it forms capacitance with both the signal/scanning wire and the common wire, and acts as a floating electrode that automatically responds to voltage changes. This multi-functionality reduces the need for additional components and wiring.
2Area of moving object
If an antistatic circuit with a floating gate electrode is used, then circuit area is reduced, but low-voltage static electricity cannot be prevented
Solution Approach 1:
The invention changes the voltage response parameter by creating an asymmetric capacitance ratio (C1 > C2). This ensures that even low-voltage static electricity can induce sufficient voltage change on the floating control electrode to turn on the transistor, while maintaining compact circuit area.
3Area of stationary object
If the frame region is downsized for design improvement, then display thinness and portability are improved, but the antistatic circuit cannot be accommodated
Solution Approach 1:
By removing the gate wire connection and making the control electrode floating, the invention eliminates unnecessary wiring space. This allows the antistatic circuit to be accommodated in the downsized frame region while maintaining full protective functionality.
Solution Approach 2:
The invention merges the control electrode directly with the transistor structure, eliminating separate wiring. The control electrode is formed as part of the transistor gate structure, reducing overall circuit footprint for accommodation in compact frame regions.
4Measurement precision
If high pixel-definition is achieved, then image quality is improved, but the frame region components must be further downsized
Solution Approach 1:
The invention extracts and removes the gate wire connection to the control electrode, eliminating wiring space. This enables further downsizing of frame region components to accommodate high pixel-definition requirements while maintaining antistatic protection.
Solution Approach 2:
The floating control electrode structure uses thin film transistor technology, allowing compact integration. The thin-film structure enables high pixel-definition displays with minimized frame region components.
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 static electricity from entering the display region by ensuring the antistatic circuit operates under low-voltage conditions, allowing for frame-region downsizing and high pixel-definition while maintaining effective static electricity protection.
Implementation Method 1
a first capacitance formed between the control electrode and the signal wire or the scanning wire is larger than a second capacitance formed between the control electrode and the common wire
Data Source
AI summary
A display includes an antistatic circuit between a common wire and at least one of a signal wire and a scanning wire. The common wire is disposed in a non-display region, and receives a common potential. The signal and scanning wires are disposed in a display region. The antistatic circuit at least includes a first transistor having a floating control electrode, a first main electrode connected to the signal wire or the scanning wire, and a second main electrode connected to the common wire. The first transistor is provided in such a manner that a first capacitance between the control electrode and the signal wire or the scanning wire is larger than a second capacitance between the control electrode and the common wire.