Gate Driving Voltage Line Layout for Stable Display Panel Nodes
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Solution Overview
Problem
Existing display devices face issues with fluctuations in the critical node voltage of the gate driving circuit, affecting the performance and sensing characteristics of the display panel.
Innovation Solution
The implementation of a display panel with a gate driving circuit that includes multiple gate high-potential voltage lines to stabilize the critical node voltage, minimizing fluctuations and maintaining stability at low power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single gate high-potential voltage line is used to charge the gate driving circuit nodes, then the device complexity is reduced, but the critical node voltage becomes unstable and fluctuates
Solution Approach 1:
The gate high-potential voltage line is segmented into multiple independent lines (first gate high-potential voltage line and second gate high-potential voltage line) that separately charge the first node and second node of the gate driving circuit. This segmentation allows independent voltage control for each node, preventing voltage fluctuations and improving stability without requiring complex inter-node coupling mechanisms.
Solution Approach 2:
A third gate high-potential voltage line is introduced as an intermediary element, branched from the first gate high-potential voltage line, to specifically stabilize the transistor controlling the first node. This intermediary line acts as a dedicated voltage reference and stabilization path, isolating the first node from voltage fluctuations on other lines while maintaining overall circuit functionality.
2Reliability
If multiple gate high-potential voltage lines are added to stabilize critical node voltage, then voltage stability improves, but the device complexity increases
Solution Approach 1:
The third gate high-potential voltage line is merged with the first gate high-potential voltage line through a branching configuration rather than creating a completely separate system. This merging approach allows the third line to leverage the existing voltage supply infrastructure while providing additional stabilization, reducing the need for separate voltage generation circuits and minimizing overall complexity.
Solution Approach 2:
The first gate high-potential voltage line serves multiple functions: it directly charges the first node, provides voltage reference for the third branched line, and contributes to overall gate driving circuit operation. This multi-functionality reduces the need for dedicated single-purpose components, thereby limiting the increase in device complexity while achieving voltage stabilization.
Data Source
AI summary
A display panel comprising a display area including a plurality of subpixels, a gate driving circuit disposed in a non-display area outside the display area to supply a plurality of scan signals to the plurality of subpixels, and a plurality of gate high-potential voltage lines which are disposed in the non-display area for transferring a plurality of gate high-potential voltages to the gate driving circuit, wherein plurality of gate high-potential voltage lines include a first gate high-potential voltage line transferring a first gate high-potential voltage for charging a first node of the gate driving circuit, a second gate high-potential voltage line transferring a second gate high-potential voltage for charging a second node of the gate driving circuit, and a third gate high-potential voltage line which is branched from the first gate high-potential voltage line for transferring a third gate high-potential voltage to stabilize a transistor controlling the first node.