Display Panel Scan-Line Segmentation for Pull-Down Delay Control
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Solution Overview
Problem
In ultra-wide display screens, the pull-down delay of scanning signals in scan lines is significant due to their length, leading to mischarging and uneven display.
Innovation Solution
A display panel with forward and reverse scan pull-down circuits located on the display area, including a pull-down module, forward and reverse scan control modules, and switching transistors, which shorten the connection routes and reduce signal transmission delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the scan line is made longer to cover ultra-wide display area, then the display area is expanded, but the pull-down delay of scanning signal increases
Solution Approach 1:
The patent divides the scan line into multiple segments by introducing multiple pull-down circuits along the scan line. Instead of having a single pull-down circuit at one end, the scan line is segmented into multiple sections, each with its own pull-down circuit. This segmentation allows the scanning signal to be pulled down at multiple points simultaneously, reducing the overall pull-down delay while maintaining the extended display area.
Solution Approach 2:
The patent introduces pull-down circuits as intermediary components along the scan line. These pull-down circuits act as mediators between the scanning signal source and the pixel circuits. By placing pull-down circuits at intermediate positions along the scan line, the signal can be efficiently pulled down without requiring the entire scan line to be actively controlled, thus reducing delay while supporting the ultra-wide display area.
2Area of stationary object
If the scan line is made longer to cover ultra-wide display area, then the display area is expanded, but the risk of mischarging increases
Solution Approach 1:
The patent segments the scan line into multiple sections with dedicated pull-down circuits for each section. This segmentation ensures that each section can be independently controlled and pulled down at the appropriate time, preventing signal overlap and mischarging issues that would occur in a single long scan line configuration. The segmented approach maintains reliability while expanding the display area.
Solution Approach 2:
The patent implements preliminary action by pre-positioning pull-down circuits at specific locations along the scan line before the scanning signal reaches those sections. This allows the pull-down circuits to be ready to immediately pull down the signal when needed, preventing delays and mischarging risks that would arise from waiting for the signal to naturally propagate through the entire long scan line.
3Loss of time
If the pull-down circuit is placed on the display area, then the connection route is shortened, but the device complexity increases
Solution Approach 1:
The patent designs the pull-down circuits to serve multiple functions: they act as signal pull-down elements, timing control elements, and signal distribution elements. By making the pull-down circuits multi-functional, the patent reduces the need for separate dedicated components, thereby managing device complexity while achieving shortened connection routes and reduced signal transmission delay through their placement on the display area.
Data Source
AI summary
An embodiment of the present disclosure is directed to a display panel. The display panel includes a plurality of scan lines and a plurality of forward and reverse scan pull-down circuit. The plurality of scan lines is located on the display area. Each of the forward and reverse scan pull-down circuits includes a forward scan control module, a reverse scan control module, and a pull-down module located on a display area. The pull-down module includes an output terminal and a control terminal coupled to an output terminal of the forward scan control module and an output terminal of the reverse scan control module.