Display Panel Timing for Mixed Refresh Boundary Stability
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Solution Overview
Problem
Display anomalies occur at the boundary area between high and low refresh rate regions in display panels, affecting display quality and user experience.
Innovation Solution
A display panel design with distinct high and low refresh rate areas, where pixels in the low refresh area enter a data holding stage earlier than the data writing stage of adjacent high refresh area pixels, with signal input to data lines occurring before the data writing stage to stabilize voltage and reduce display abnormalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If different refresh rates are applied to different display areas, then energy consumption is reduced and display quality is improved in high refresh areas, but display anomalies occur at the boundary area between high and low refresh regions
Solution Approach 1:
The patent applies preliminary action by advancing the data holding stage for pixels in the low refresh area before the data writing stage begins for pixels in the high refresh area. This temporal offset ensures that data lines are stabilized and voltage levels are maintained before the high refresh area pixels are updated, preventing display anomalies at the boundary while maintaining energy savings from the mixed refresh rate strategy
2Device complexity
If data writing stage starts simultaneously for all pixels, then control is simplified, but voltage fluctuations cause display abnormalities at refresh rate boundaries
Solution Approach 1:
The patent applies local quality by implementing different data stage timing for different spatial regions. Pixels in the low refresh area enter the data holding stage at an earlier time compared to pixels in the high refresh area. This localized temporal differentiation stabilizes voltage fluctuations in the boundary region without requiring complete redesign of the control system, thus improving display quality while maintaining manageable control complexity
3Reliability
If refresh rate is increased for all display areas, then display smoothness and clarity are improved, but power consumption increases significantly
Solution Approach 1:
The patent applies segmentation by dividing the display panel into different refresh rate regions (first display area with lower refresh rate and second display area with higher refresh rate). This spatial segmentation allows each region to operate at its optimal refresh rate, improving overall display quality through high refresh rates in critical areas while reducing total power consumption through lower refresh rates in less demanding areas
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach stabilizes voltage levels, reducing display abnormalities and improving overall display quality and user experience by minimizing flickering and brightness inconsistencies.
Implementation Method 1
at least one of the plurality of data lines and at least one of the plurality power line having capacitance therebetween
Data Source
AI summary
Embodiments of the present application provide a display panel and a method for driving it, and a display device, the display panel comprising: a display array, comprising a first and a second display area, picture refresh frequency of the first display area being less than that of the second display area; pixel circuits, comprising first pixel circuits to control display states of a first row display pixels in the second display area close to the first display area; a working process of the pixel circuits comprises reset, data writing and light-emitting stage, in first display frame, display pixels of the first display area enter data holding stage, display pixels of the second display area enter data writing stage, at first moment earlier than a start moment of data writing stage of the first pixel circuits in the first display frame, a first signal is provided to the data lines.