Sub-scanning Line Driving Circuit for Partial Display Power Savings
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Solution Overview
Problem
Conventional displays waste power as they require driving a whole row of thin-film transistors even when only part of the display region is used for image display.
Innovation Solution
A driving substrate with cascaded scanning driving units that divide each row scanning line into sub-scanning lines, allowing for separate output of gate scanning signals to each sub-scanning line, enabling the driving of only the necessary thin-film transistors in the display region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a whole row of scanning lines is used to control pixel cells, then all thin-film transistors in the row can be driven, but power is wasted when only part of the display region is used
Solution Approach 1:
The patent divides each scanning line into multiple sub-scanning lines (first sub-scanning line, second sub-scanning line, etc.). Each sub-scanning line can be independently controlled by separate scanning driving units, allowing selective activation of only the sub-scanning lines corresponding to the used display region, thereby reducing power consumption while maintaining adaptability to partial display usage
2Ease of manufacture
If the scanning driving circuit is arranged in the non-display region, then the circuit layout is simplified, but the entire row of TFTs must still be driven even when only part of the display is used
Solution Approach 1:
The scanning driving circuit is divided into multiple scanning driving units (first scanning driving unit, second scanning driving unit, etc.), with each unit controlling a specific sub-scanning line. This segmentation allows independent control of different display regions, enabling power savings when only part of the display is used while keeping the overall circuit layout manageable through systematic arrangement
Solution Approach 2:
The patent introduces a new dimension of control by creating multiple sub-scanning lines within each scanning line dimension. This allows the system to control not just entire rows but also specific segments within rows, adding granularity to the display region control without fundamentally changing the overall circuit architecture
Data Source
AI summary
Disclosed are a driving substrate, a display panel, and a display device. The driving substrate is applied to a display panel and includes a base; data lines and row scanning lines, arranged on a side of the base; and a scanning driving circuit, arranged on the side of the base and including a plurality of scanning driving units that are cascaded. Each row scanning line includes at least two sub-scanning lines, and the scanning driving circuit is configured to output a gate scanning signal to each sub-scanning line. The present disclosure may save power by dividing each row scanning line into multiple sub-scanning lines and separately outputting the gate scanning signal for each sub-scanning line, making it possible to drive only part of the thin-film transistor in each row when only part of the display region of the display panel is used for displaying images.