Display Apparatus Dynamic Refresh Rate Flicker Reduction
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Solution Overview
Problem
Existing display technologies face challenges in balancing power consumption and display effect, particularly in scenarios requiring multiple refresh rates, which can lead to display flicker and reduced image stability.
Innovation Solution
A method for driving a display apparatus that involves alternating between different refresh rates by adjusting the timing of effective and ineffective phases, along with varying the voltage magnitudes of ineffective data signals to minimize current variations and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple refresh rates are used to meet different display requirements, then adaptability is improved, but display stability deteriorates due to flicker
Solution Approach 1:
The patent implements dynamic refresh rate switching between 60Hz and 120Hz based on display content requirements. The system transitions from static to dynamic operation by selecting different refresh rates adaptively, allowing the display to optimize between power consumption (60Hz) and smooth motion rendering (120Hz) while maintaining image stability through coordinated control of scan signals and data signals.
Solution Approach 2:
The patent changes key timing parameters including refresh rate, phase durations, and signal voltages to resolve flicker. Specifically, it adjusts the duration of effective phases and ineffective phases, modifies the voltage magnitude of ineffective data signals, and synchronizes scan signal phases with data signal phases across different refresh rates to eliminate display instability.
2Illumination intensity
If refresh rate is increased to improve display smoothness, then display effect is improved, but power consumption increases
Solution Approach 1:
The patent employs periodic action by implementing variable refresh rates (60Hz and 120Hz) based on display content characteristics. For static or low-motion content, the system uses 60Hz to reduce power consumption, while for high-motion content requiring smoother display, it switches to 120Hz. This periodic adaptation allows the display to optimize between smoothness and energy consumption dynamically.
Solution Approach 2:
The system transitions from fixed refresh rate to dynamic refresh rate switching, allowing real-time optimization between display smoothness and power consumption based on content requirements, application scenarios, and user preferences.
3Loss of energy
If ineffective data signal voltage is reduced to lower power consumption, then energy efficiency is improved, but current variation increases causing display instability
Solution Approach 1:
The patent carefully adjusts the voltage parameter of ineffective data signals to an optimized magnitude that balances power consumption and current stability. By controlling the voltage reduction within specific ranges and coordinating it with phase synchronization, the system achieves energy efficiency while preventing excessive current variations that would cause display instability or flicker.
Solution Approach 2:
The system implements coordinated control where the timing and voltage of ineffective data signals are synchronized with scan signal phases. This feedback mechanism ensures that voltage reductions in ineffective phases do not create harmful current variations, maintaining display stability while achieving power savings.
Data Source
AI summary
A method for driving a display apparatus includes: in a first refresh period which corresponds to a first refresh rate and includes a first effective phase and first ineffective phase(s), outputting a first image frame signal to a display panel of the display apparatus in the first effective phase, and outputting a first ineffective data signal to the display panel in a first ineffective phase; and in a second refresh period which corresponds to a second refresh rate and includes a second effective phase and second ineffective phase(s), outputting a second image frame signal to the display panel in the second effective phase, and outputting a second ineffective data signal to the display panel in a second ineffective phase. The first refresh rate is different from the second refresh rate, and the first ineffective data signal and the second ineffective data signal have different magnitudes in voltage.