Display Substrate Drive Modes for Low-Refresh Flicker Reduction
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Solution Overview
Problem
Existing display technologies using Low Temperature Polycrystalline Oxide (LTPO) technology suffer from flickering issues during low-frequency display, which degrades the display effect.
Innovation Solution
A display substrate with dual drive modes, including a first drive mode with a lower refresh rate and a second drive mode with a higher refresh rate, where the first drive mode incorporates a refresh frame and a maintain frame, utilizing AC signals for initial signals and constant data signals to stabilize pixel circuits, and a pixel circuit design with specific signal timing to minimize flickering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a low refresh rate is used to reduce power consumption, then energy efficiency is improved, but display stability deteriorates due to flickering
Solution Approach 1:
The display refresh operation is segmented into two distinct modes: a first drive mode with a lower refresh rate for power saving, and a second drive mode with a higher refresh rate for stability. The system dynamically switches between these modes based on content requirements, allowing energy efficiency to be improved without permanently sacrificing display stability.
Solution Approach 2:
The refresh rate is made dynamic rather than fixed. The display substrate can adaptively switch between the first drive mode (lower refresh rate) and the second drive mode (higher refresh rate) depending on the display content and requirements. This dynamic adjustment allows the system to optimize power consumption while maintaining display stability when needed.
2Reliability
If a high refresh rate is used to improve display stability, then display quality is improved, but power consumption increases
Solution Approach 1:
The display operation is divided into different drive modes with different refresh rates. The second drive mode provides high refresh rate for stability when needed, while the first drive mode provides low refresh rate for power saving. This segmentation allows the system to avoid continuously consuming high power while maintaining the capability for high stability when required.
Solution Approach 2:
The refresh rate parameter is changed based on display requirements. Instead of maintaining a constantly high refresh rate, the system adjusts the refresh rate parameter dynamically by switching between drive modes, thereby reducing power consumption while maintaining display stability only when necessary.
3Reliability
If AC signals are used for initial signals, then pixel circuit stability is improved, but signal complexity increases
Solution Approach 1:
AC (Alternating Current) signals are used for the initial signals in the pixel circuits. These periodic signals help stabilize the pixel circuits by preventing charge accumulation and maintaining consistent electrical characteristics. The periodic nature of AC signals provides regular resetting effects that improve pixel circuit stability without requiring additional hardware components.
Data Source
AI summary
Provided is a display substrate, a drive method thereof and a display apparatus, the display substrate includes: a first drive mode and a second drive mode, the first drive mode has a refresh rate less than that of the second drive mode, wherein the contents displayed on the display substrate include a plurality of display frames, in the first drive mode, the display frames include: a refresh frame and at least one maintain frame; the display substrate includes pixel circuits arranged in an array, the pixel circuits include a data signal line and a first initial signal line; the data signal line provides a first data signal in the maintain frame, the voltage value of the first data signal is constant, and/or the first initial signal line provides a first initial signal in the refresh frame and the maintain frame, the first initial signal is an AC signal.