Variable Refresh Rate Display Control for Motion Blur Reduction
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Solution Overview
Problem
Conventional display devices using fixed refresh rates for MPRT methods often result in aliasing distortion and motion blur, leading to user discomfort due to afterimages, which the proposed solution aims to address by improving image output quality.
Innovation Solution
A display control method that calculates a refresh rate based on a vertical synchronization signal and generates a backlight control signal to adjust the light sources of a backlight module, allowing for variable refresh rates and dynamic control of backlight operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed refresh rate is used for MPRT processing, then the display device can operate with simple control logic, but aliasing distortion and motion blur occur leading to user discomfort
Solution Approach 1:
The patent implements variable refresh rate capability where the display controller dynamically adjusts the refresh rate based on the vertical synchronization signal from the graphics processing unit. This allows the system to adapt to different content types and frame rates, eliminating the fixed refresh rate limitation while maintaining manageable control complexity through automated detection and adjustment mechanisms.
Solution Approach 2:
The patent changes the refresh rate parameter dynamically rather than maintaining a fixed value. By calculating the refresh rate from the vertical synchronization signal and adjusting the backlight control accordingly, the system optimizes image quality for different scenarios, reducing aliasing distortion and motion blur while keeping the control system manageable through parameter adaptation.
2Illumination intensity
If the backlight is kept on continuously, then the display maintains consistent brightness, but energy consumption increases
Solution Approach 1:
The patent implements periodic backlight control where the backlight module is activated only during specific time windows corresponding to frame display periods. The controller calculates the refresh rate from the vertical synchronization signal and generates backlight control signals that turn the backlight on only when needed for each frame, creating a periodic on-off pattern that maintains brightness consistency during display while significantly reducing energy consumption during non-display periods.
Solution Approach 2:
The display controller autonomously manages the backlight timing by detecting the vertical synchronization signal and automatically generating appropriate backlight control signals without requiring external intervention. The system self-regulates the backlight duty cycle based on the calculated refresh rate, optimizing the balance between brightness consistency and energy efficiency independently.
3Manufacturing precision
If variable refresh rate is implemented with dynamic backlight control, then image output quality improves, but the control system becomes more complex
Solution Approach 1:
The patent employs feedback mechanisms where the display controller continuously monitors the vertical synchronization signal from the graphics processing unit and adjusts the refresh rate and backlight control accordingly. This closed-loop approach allows the system to automatically adapt to varying frame rates and content requirements, improving image output quality while managing control complexity through automated feedback-driven adjustments rather than complex manual control logic.
Data Source
AI summary
A display control method and a display apparatus are provided. The display control method includes receiving a vertical synchronization signal, calculating a refresh rate according to the vertical synchronization signal, comparing the refresh rate with a threshold value to generate a comparison result, and generating a backlight control signal to control of a display panel of the display apparatus according to the comparison result.