Display Panel Scan Pull-Down Circuits for High-Resolution Timing
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Solution Overview
Problem
Display abnormality caused by over-loading in display areas of display panels, leading to issues such as delays in scan signals and incorrect charging, which hinder high-frequency display performance.
Innovation Solution
Incorporation of forward and reverse scan pull-down circuits in display panels, with each set of circuits including N forward and reverse scan pull-down modules electrically connected to N scan lines in a one-to-one correspondence, ensuring rapid pull-down of scan signal edges regardless of scanning direction, thereby reducing signal delays and improving charging efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution of the display panel is increased to provide ultra-high resolution, then the display quality is improved, but the loading in the display area increases causing display abnormality
Solution Approach 1:
The display area is divided into multiple display subareas, and the scan lines are segmented into different groups. Forward scan pull-down circuits are disposed in different regions (first display subarea, second display subarea, and third display subarea) to independently manage and pull down scan signals in each segment. This segmentation reduces the loading in each individual subarea while maintaining ultra-high resolution across the entire display area.
2Measurement precision
If more scan lines are added to achieve higher resolution, then the display quality is improved, but the scan signal delays increase causing charging errors
Solution Approach 1:
Forward scan pull-down circuits are introduced as intermediary components between the scan signal source and the display pixels. These circuits actively pull down the scan signals after they have been transmitted through the scan lines, ensuring that the falling edges of the scan signals are rapidly established. This intermediary mechanism compensates for the signal delays caused by the increased number of scan lines, preventing charging errors and maintaining timing accuracy even in ultra-high resolution displays.
Data Source
AI summary
The present application provides a display panel and a display device, the display panel includes: N scan lines, the N is an integer greater than or equal to 1; and J sets of forward and reverse scan pull-down circuits, each set of the forward and reverse scan pull-down circuits includes N forward and reverse scan pull-down modules, at least a part of each of the forward and reverse scan pull-down modules is disposed in the display subarea, and the J is an integer greater than or equal to 1. In each set of the forward and reverse scan pull-down circuits, output terminals of the N forward and reverse scan pull-down modules are connected to the N scan lines in a one-to-one correspondence.