Display Substrate Control Areas for High-Refresh Progressive Scanning
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Solution Overview
Problem
Existing display technologies fail to provide high-resolution displays due to large load and hardware data transmission restrictions, limiting medium and large size displays from achieving high refresh rates.
Innovation Solution
A display substrate design with control areas and area control lines, including control buses and branch lines, that allow progressive scanning and control of writing transistors to achieve high refresh rates, reducing layout complexity and parasitic capacitance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional data transmission methods are used in medium and large size displays, then hardware data transmission is restricted, but high refresh rate function cannot be realized
Solution Approach 1:
The display screen is divided into multiple control areas, each independently controllable through area control lines. This segmentation allows different refresh rates for different regions, enabling high refresh rates in specific areas without requiring the entire large display to handle the full data transmission load, thus resolving the hardware transmission restrictions.
Solution Approach 2:
Different control areas can be assigned different refresh rates based on local requirements. High refresh rates are applied only where needed (e.g., gaming areas), while other areas maintain standard refresh rates, optimizing performance without overwhelming the hardware data transmission capacity.
2Productivity
If area control lines are added to enable progressive scanning, then control signal transmission is optimized, but layout complexity increases
Solution Approach 1:
The area control lines are integrated with the existing scan line structure. The area control lines share routing paths and control logic with the scan lines, merging multiple functions into a unified control system. This reduces the overall layout complexity despite adding area control functionality.
Solution Approach 2:
The area control lines serve multiple functions: they control the writing control transistors, enable progressive scanning, and allow dynamic refresh rate adjustment. This multi-functionality reduces the need for separate dedicated control circuits, simplifying the overall layout.
3Productivity
If writing control transistors are controlled through area control lines, then load is reduced, but parasitic capacitance is introduced
Solution Approach 1:
The writing control transistors are extracted from the traditional scan control path and placed under independent area control. This separation allows the main scan lines to handle only the essential scanning function, reducing their load, while the area control lines provide selective activation to minimize parasitic capacitance effects.
Solution Approach 2:
The area control lines dynamically activate only the necessary control areas during each refresh cycle. This dynamic control reduces the number of simultaneously active transistors, minimizing total parasitic capacitance while still achieving comprehensive coverage over time through progressive scanning.
Data Source
AI summary
A display substrate and driving method thereof, a display device are provided. The display substrate includes: a base substrate, and a plurality of repeating units and a plurality of data lines on the base substrate, the plurality of repeating units are divided into plurality of repeating unit columns; each repeating unit includes a plurality of subpixels, the subpixel includes a subpixel driving circuit, the subpixel driving circuit includes a data writing transistor, a writing control transistor and a driving transistor; the first electrode of the data writing transistor is coupled to the corresponding data line, the second electrode of the data writing transistor is coupled to the first electrode of the writing control transistor, and the second electrode of the writing control transistor is coupled to the gate of the driving transistor.