Display Grayscale Compensation for Flicker Reduction
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Solution Overview
Problem
Variable refresh rate technologies face issues with picture flickering due to excessive frame rate jumps when the graphics card's rendering rate is lower than the display's minimum refresh rate, leading to brightness differences and display problems.
Innovation Solution
A display control method that performs grayscale compensation on consecutive frames when the low frame rate compensation function is activated, using compensation values from a table to match the brightness attenuation curve, thereby reducing brightness differences and improving display stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If low frame rate compensation is implemented by multiplying frame rate, then display completeness is improved, but picture flickering occurs due to excessive frame rate jump
Solution Approach 1:
The patent applies parameter changes by adjusting grayscale values of display frames based on frame rate multiplication ratios. When the frame rate is multiplied (e.g., 3x), the grayscale of corresponding display frames is compensated (e.g., reduced) to match the brightness attenuation characteristics, thereby maintaining picture stability while preserving display completeness.
2Reliability
If frame rate is multiplied to compensate low frame rate, then display coverage is improved, but brightness differences occur between frames
Solution Approach 1:
The patent applies local quality by differentiating grayscale compensation for different display frames based on their position in the sequence. Frames at different positions receive different grayscale compensation values to account for human visual perception characteristics, where earlier frames have greater impact on perceived brightness than later frames.
3Illumination intensity
If grayscale compensation is applied to consecutive frames, then brightness consistency is improved, but processing complexity increases
Solution Approach 1:
The patent applies parameter changes by systematically adjusting grayscale values of display frames based on frame rate multiplication ratios and positional characteristics. Compensation values are calculated and applied to different frames according to a predetermined scheme, achieving brightness consistency through parameter modification rather than complex processing operations.
Data Source
AI summary
A display control method determines whether a low frame rate compensation function is in an on state when a frame rate of a current frame rendered by a graphics processor is smaller than a minimum refresh rate of a display panel, performs grayscale compensation on at least one frame of display picture in consecutive n frames of display pictures of the display panel when the low frame rate compensation function is in the on state, and controls the display panel to display the compensated consecutive n frames of display pictures.