GOA Circuit Segmentation for Stable All Gate On Function
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Solution Overview
Problem
Conventional Gate On Array (GOA) circuits fail to perform the all gate on function stably, which is essential for display devices with touch panels, as they struggle to charge and turn on scanning lines effectively.
Innovation Solution
A GOA circuit with multiple levels of GOA units, each connected to a first and second gate all on signal, includes a gate all on control module, pull-up and pull-down modules, and maintenance modules to control and maintain the scanning lines, ensuring stable operation during the all gate on process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional GOA circuit is used, then the circuit structure is simple, but the all gate on function cannot be performed stably
Solution Approach 1:
The GOA circuit is divided into multiple levels of GOA units (first level, second level, third level, etc.), with each level independently controlling scanning lines. This segmentation allows stable all gate on function by enabling independent control and charging of scanning lines at different levels, resolving the contradiction between reliability and complexity.
Solution Approach 2:
The patent introduces a hierarchical dimension by organizing GOA units into multiple levels (first level, second level, third level, etc.), where each level controls scanning lines in a specific layer. This dimensional organization enables stable all gate on function through systematic control across different levels, improving reliability without excessive complexity.
2Adaptability or versatility
If all gates are turned on to enable touch panel function, then the display device can wake from black screen, but residual potentials in pixel capacitance cannot be emptied properly
Solution Approach 1:
Before the all gate on process, the patent applies black voltage to data lines in advance to preemptively empty residual potentials in pixel capacitance. This preliminary action ensures that when all gates are turned on for touch panel function, the display device can wake from black screen without interference from residual charges, resolving the contradiction between adaptability and reliability.
3Ease of operation
If scanning lines are charged using conventional GOA circuit, then the charging process is simple, but the scanning lines cannot be turned on effectively
Solution Approach 1:
The scanning lines are segmented into multiple groups controlled by different levels of GOA units. Each level charges and turns on scanning lines in its specific layer independently. This segmentation makes the charging process manageable and effective, ensuring reliable turn on of scanning lines while maintaining operational simplicity through systematic control.
Data Source
AI summary
The invention discloses a GOA circuit, a display device and a drive method of a GOA circuit, the GOA circuit is set to be GOA units including a plurality of levels, a N leveled GOA unit is applied to charge a N leveled scanning line of a display region of the display device, the N leveled scanning line is connected to a first gate all on signal and a second gate all on signal, which can guarantee scanning lines corresponding to all the GOA units are being charged under control of the first gate all on signal and the second gate all on signal. The invention can carry out an all gate on function according to the method above.