Gate Driver on Array Voltage Control for Leakage Stability
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Solution Overview
Problem
Conventional GOA circuits suffer from high complexity and instability due to leakage currents in transistors, which affect the stability and performance of the circuit.
Innovation Solution
The GOA circuit design includes a first GOA unit with a pull-up control module and transistors configured to ensure the gate voltage is lower than the source voltage when turned off, reducing leakage currents and enhancing stability by using N-type or P-type transistors with specific voltage level settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transistors are used in conventional GOA circuits, then the circuit can function to drive display lines, but leakage currents occur which reduce circuit stability
Solution Approach 1:
The patent changes the voltage level parameters of control signals to ensure that when the first transistor is turned off, the gate voltage is lower than the source voltage. This parameter adjustment eliminates leakage currents by creating a proper voltage differential that fully depletes the transistor channel, thereby improving circuit stability without sacrificing functionality
2Area of stationary object
If GOA circuits are integrated in the array substrate, then area is saved and manufacturing cost is reduced, but the structure becomes complex with many condensed signal lines
Solution Approach 1:
The patent segments the GOA circuit into multiple stages, with each stage containing specific functional modules (first pull-up control module, first pull-down control module, etc.). This segmentation organizes the complex signal lines into manageable functional blocks, making the integrated circuit easier to design and manufacture while maintaining area efficiency
3Object-generated harmful factors
If the first transistor is turned off with gate voltage lower than source voltage, then leakage currents are reduced, but specific voltage level control is required
Solution Approach 1:
The patent employs dynamic voltage level control where the control signal adapts its voltage level based on the required transistor state. The system dynamically adjusts voltage levels to ensure proper transistor switching while maintaining the ability to control multiple transistors with different voltage requirements, thus reducing leakage without sacrificing overall system adaptability
Data Source
AI summary
A gate driver on array (GOA) circuit includes a first GOA unit. The first GOA circuit includes a first pull-up control module that includes a first transistor, having a gate receiving a control signal, a source receiving a starting signal, and a drain electrically connected to a first node. When the first transistor is turned off, a voltage level of the gate of the first transistor is lower than a voltage level of the source; the source of the first transistor is an end for signal inputting; and the drain of the first transistor is an end for signal outputting.