Curved Display Panel Color and Brightness Calibration
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Solution Overview
Problem
Display panels, especially curved ones, face challenges in maintaining consistent light emission and perceived luminance due to manufacturing tolerances and curvature, leading to visual artifacts and reduced image quality.
Innovation Solution
An electronic device with image processing circuitry that adapts image data processing by calibrating compensation parameters, including pixel uniformity and panel curvature factors, to match target light emission and luminance across different pixel positions and brightness settings, using a calibration process that accounts for flat panel characteristics before applying them to curved panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a curved display panel is used to provide immersive display, then adaptability and visual appeal are improved, but manufacturing precision and perceived image quality deteriorate due to non-uniform light emission and viewing angles
Solution Approach 1:
The patent applies local quality by implementing position-dependent compensation parameters. Different regions of the curved display panel (center vs. edges) receive customized compensation values for brightness and color. The system divides the display into multiple zones and applies specific compensation factors to each zone to counteract the non-uniform light emission characteristics caused by curvature, thereby achieving uniform perceived image quality across the entire curved surface.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting compensation parameters based on the curved display's geometric characteristics. The system calculates compensation values that account for varying viewing angles and light emission intensities at different positions. By modifying brightness and color parameters locally across the display, the system compensates for curvature-induced non-uniformity while preserving the immersive curved display experience.
2Manufacturing precision
If compensation parameters are calibrated for each pixel position to improve image quality, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the curved display panel into multiple discrete regions or zones, each with its own compensation parameters. Instead of treating the entire display uniformly, the system segments it into manageable sections (e.g., center region, edge regions, corner regions) and applies tailored compensation to each segment. This reduces the computational complexity compared to per-pixel calibration while still achieving acceptable uniformity across the display.
Solution Approach 2:
The patent implements preliminary action by pre-calculating and storing compensation parameters during the manufacturing or setup phase. The calibration process determines the optimal compensation values for different display regions in advance, and these pre-computed parameters are then applied during normal operation without requiring real-time calculation. This shifts the computational burden to the calibration phase, simplifying the runtime system while maintaining image quality consistency.
3Manufacturing precision
If multiple compensation parameters are applied to account for curvature effects, then manufacturing precision is improved, but ease of operation deteriorates due to complex calibration processes
Solution Approach 1:
The patent applies self-service by implementing automated calibration routines that perform the complex compensation parameter adjustment without requiring manual intervention. The system automatically captures reference images, analyzes luminance non-uniformity, calculates appropriate compensation values, and applies them to the display. This self-calibrating approach eliminates the need for operators to manually adjust multiple parameters, significantly improving ease of operation while achieving precise luminance uniformity across the curved display.
Solution Approach 2:
The patent utilizes feedback by implementing a closed-loop calibration system that continuously monitors display output and adjusts compensation parameters accordingly. The system captures reference images at different positions, compares actual luminance values against target values, and uses the difference to refine compensation parameters. This feedback mechanism automates the calibration process, making it easier to operate while achieving precise luminance uniformity across the curved display surface.
Data Source
AI summary
Systems and methods are provided to compensate image data for display on a curved display. A pixel uniformity compensation factor may be applied based on a pixel uniformity compensation factor map that is calibrated to the display panel while the display panel has a flat shape, and a panel curvature compensation factor may be applied when the image content is to be displayed while the display panel has a curved shape. The panel curvature compensation factor may be based on a panel curvature compensation factor map that is calibrated to the display panel after the display panel is bent from the flat shape to the curved shape.