Auxiliary Transistor Layout for Display Panel Refresh Rate
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Solution Overview
Problem
Traditional display devices face challenges in achieving high refresh rates due to long electrical potential jump times and low aperture ratios in the scan signal process, leading to potential data signal crosstalk and reduced visual performance.
Innovation Solution
The display panel incorporates an auxiliary transistor with a specific layout that includes a control line, an electrical potential transmission line, and a gate electrode layer, where the electrical potential transmission line overlaps the control line, allowing for faster electrical potential changes and increased aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the scan signal progresses at high speed to achieve high refresh rate, then the refresh rate is improved, but the electrical potential jump time becomes longer and aperture ratio decreases
Solution Approach 1:
The auxiliary transistor is activated in advance before the main scanning process to pre-charge or pre-discharge the scan line, preparing the electrical potential in advance. This preliminary action reduces the jump time required during the actual scanning process, enabling higher refresh rates without increasing the electrical potential transition time.
Solution Approach 2:
The auxiliary transistor acts as an intermediary device between the scan signal source and the main scanning circuit. It serves as a buffer that can rapidly adjust the electrical potential on the scan line, mediating the signal transmission to achieve faster potential changes without directly increasing the main scanning current, thus maintaining aperture ratio while improving refresh rate.
2Productivity
If the scan signal progresses at high speed to achieve high refresh rate, then the refresh rate is improved, but data signal crosstalk increases
Solution Approach 1:
The auxiliary transistor performs preliminary charging or discharging of the scan line before the data signal is written. This pre-conditioning ensures that the scan line is in the correct electrical state, allowing the data signal to be written without causing crosstalk, even when scanning at high speeds.
Solution Approach 2:
The auxiliary transistor serves as an intermediary that isolates the data signal from potential interference during high-speed scanning. By controlling the electrical potential on the scan line independently, it prevents the data signal from being affected by scan signal transitions, thereby eliminating crosstalk while maintaining high refresh rate operation.
3Area of stationary object
If the aperture ratio is increased to improve display performance, then the aperture ratio is improved, but the time for electrical potential change increases
Solution Approach 1:
The auxiliary transistor is activated before the main scanning process to pre-adjust the electrical potential on the scan line. This preliminary action ensures that when the aperture ratio is increased and more time is available for potential changes, the system is already prepared, allowing rapid transitions without compromising the increased aperture ratio.
Solution Approach 2:
The auxiliary transistor acts as an intermediary that decouples the aperture ratio from the electrical potential change time. By providing a separate fast-response path through the auxiliary transistor, the system can maintain a high aperture ratio while the auxiliary transistor handles the rapid potential changes, eliminating the trade-off between aperture ratio and transition speed.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes an active layer, a gate electrode layer, and a metal layer. By forcibly pulling down an electrical potential of a scan signal in a first scan line when a pulse rising edge of the scan signal in the second scanning line arrives, an electrical potential falling time of each scan signal in a display area can be shortened. At the same time, a control line is constructed to at least partially overlaps an electrical potential transmission line in a thickness direction of the display panel, to increase an aperture ratio as much as possible.