Electrostatic Protection Circuit for Display Device Leakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Static electricity generated during the manufacturing process of display devices can lead to defects, and existing electrostatic protection circuits may not effectively prevent current leakage.
Innovation Solution
The display device incorporates an electrostatic protection circuit that includes a first and second electrostatic diode, with specific terminal connections to the gate driving voltages and data voltage, and utilizes a lower bias voltage with negative polarity to reduce current leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electrostatic protection circuit is provided to prevent defects due to static electricity, then reliability is improved, but current leakage occurs
Solution Approach 1:
The patent changes the electrical parameters of the protection circuit by introducing a lower bias voltage to the first lower gate terminal. This parameter change allows the circuit to maintain protection functionality while reducing current leakage by controlling the threshold voltage and conduction characteristics of the first protection transistor.
2Object-affected harmful factors
If existing electrostatic protection circuits are used, then static electricity protection is provided, but they cannot effectively prevent current leakage
Solution Approach 1:
The patent introduces a second protection transistor as an intermediary element between the data driver and the pixel. This second protection transistor, controlled by the second gate driving voltage, acts as a mediator that can block or control current flow while the first protection transistor handles the electrostatic protection function, thereby preventing current leakage.
Solution Approach 2:
The patent applies parameter changes by applying a lower bias voltage to the first lower gate terminal and using different gate driving voltages for the two protection transistors. This parameter control enables the circuit to achieve both electrostatic protection and current leakage prevention by adjusting the conduction thresholds and operational states of the transistors.
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 proposed solution effectively reduces or prevents current leakage and defects caused by static electricity, enhancing the reliability and performance of the display device.
Implementation Method 1
including a first electrostatic diode including a first gate terminal connected to the first gate driving voltage, a first terminal connected to the first gate driving voltage, a second terminal connected to the data voltage
Data Source
AI summary
A display device comprises a gate driver configured to receive a first gate driving voltage, configured to receive a second gate driving voltage that is greater than the first gate driving voltage, and configured to transmit a gate signal to a pixel, a data driver configured to transmit a data voltage to the pixel, and an electrostatic protection circuit configured to receive the first gate driving voltage and the data voltage, and including a first electrostatic diode including a first gate terminal connected to the first gate driving voltage, a first terminal connected to the first gate driving voltage, a second terminal connected to the data voltage, and a first lower gate terminal connected to a lower bias voltage.