Display Driver Gamma Interpolation for Brightness Control
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Solution Overview
Problem
Display systems face challenges in dynamically adjusting the brightness levels of segmented screen areas, leading to visually perceivable artifacts at boundaries between adjacent areas with different brightness levels.
Innovation Solution
A display driver with image processing circuitry and drive circuitry that generates voltage data using distinct gamma parameter sets for each screen area and interpolates a gamma parameter set for the connection area between them, allowing for flexible brightness control and artifact mitigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If distinct gamma parameter sets are used for different screen areas to enable individual brightness control, then brightness flexibility is improved, but visual artifacts appear at boundaries between areas
Solution Approach 1:
The patent applies local quality by using distinct gamma parameter sets for different screen areas (first screen area and second screen area) to enable individual brightness control. Each area can have its own gamma curve characteristics optimized for its specific function, allowing the main content area and interactive UI area to have different brightness characteristics independently.
Solution Approach 2:
The patent introduces a connection area as an intermediary region between the first and second screen areas. This connection area uses an interpolated gamma parameter set that transitions between the two distinct gamma parameter sets, serving as a mediator that smooths the transition and eliminates visual artifacts at the boundary while maintaining the brightness flexibility of the distinct areas.
2Manufacturing precision
If brightness levels are adjusted independently for segmented screen areas, then individual area optimization is improved, but smooth transitions at boundaries deteriorate
Solution Approach 1:
The patent segments the display panel into multiple distinct screen areas (first screen area and second screen area) that can be independently controlled with different gamma parameter sets. This segmentation allows each area to be optimized for its specific purpose while maintaining overall display functionality.
Solution Approach 2:
The connection area acts as an intermediary transition zone between the segmented screen areas. It uses an interpolated gamma parameter set that smoothly transitions between the parameter sets of adjacent areas, ensuring visual continuity and eliminating abrupt boundaries while preserving the precision of individual area brightness control.
3Object-affected harmful factors
If gamma parameter interpolation is used for connection areas, then artifact suppression is improved, but processing complexity increases
Solution Approach 1:
The patent changes the gamma parameters in the connection area by interpolating between the gamma parameter sets of adjacent screen areas. This parameter transition creates a smooth gradient in the connection area that suppresses visual artifacts at boundaries while maintaining compatibility with the display panel's existing gamma control mechanisms.
Data Source
AI summary
A display driver includes image processing circuitry and drive circuitry. The image processing circuitry is configured to generate first voltage data for a first pixel in a first screen area of a display panel using a first gamma parameter. The image processing circuitry is further configured to generate second voltage data for a second pixel in a second screen area of the display panel using a second gamma parameter set. The image processing circuitry is further configured to determine an interpolated gamma parameter set for a third pixel in a connection area of the display panel through interpolation between the first gamma parameter set and the second gamma parameter set. The connection area is disposed between the first screen area and the second screen area. The image processing circuitry is further configured to generate third voltage data for the third pixel using the interpolated gamma parameter set.