Flat Panel Display Dynamic Backlight Control for Color Reproducibility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional liquid crystal displays using four-color technology struggle to accurately depict pure colors or colors close to pure colors due to reduced RGB pixel areas and lower brightness, leading to unsatisfactory image reproducibility.
Innovation Solution
A flat panel display with a dynamic adjustment mechanism, comprising a four-color conversion unit, dynamic backlight control unit, and pixel array, which converts three-color input signals into four-color signals using a preliminary lookup table and adjusts backlight intensity based on scaling factors to enhance image reproducibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If four-color display technology is used to enhance image brightness, then brightness is improved, but the area available for RGB pixels is reduced causing lower chroma and accuracy of pure colors
Solution Approach 1:
The patent implements dynamic adjustment mechanisms including a dynamic lookup table that adapts conversion parameters based on image content analysis, and a dynamic backlight control that adjusts local backlight intensity. This allows the system to optimize between brightness and color accuracy in real-time based on the specific image being displayed, rather than using fixed four-color conversion parameters.
Solution Approach 2:
The system changes conversion parameters dynamically based on image content. The lookup table stores multiple conversion parameter sets that are selected based on the proportion of pure colors in the image. Additionally, the backlight intensity parameters are adjusted dynamically to compensate for color accuracy variations, allowing the system to maintain high color fidelity while utilizing four-color technology for enhanced brightness.
2Illumination intensity
If white-color pixels are added to achieve four-color display, then image brightness is enhanced, but the chroma of pure colors deteriorates
Solution Approach 1:
The patent employs feedback mechanisms where the system analyzes the image content to determine the proportion of pure colors, then uses this information to adjust conversion parameters and backlight intensity accordingly. This feedback loop allows the system to maintain color reproducibility by compensating for the presence of white pixels through dynamic parameter adjustment, ensuring that pure colors are accurately reproduced even in four-color display mode.
Solution Approach 2:
The system performs preliminary analysis of the image content to identify regions with pure colors before displaying. Based on this preliminary action, it pre-adjusts the conversion parameters and backlight intensity to ensure that pure colors are accurately reproduced. This proactive approach prevents color accuracy deterioration before it occurs, maintaining high color reproducibility in four-color display mode.
3Adaptability or versatility
If RGB pixel areas are reduced to accommodate white pixels, then four-color display capability is achieved, but image reproducibility deteriorates
Solution Approach 1:
The patent implements dynamic parameter adjustment mechanisms that adapt to image content. The lookup table conversion parameters are dynamically selected based on the proportion of pure colors detected in the image, and the backlight intensity is dynamically adjusted to compensate for reduced RGB pixel areas. This dynamic adaptation allows the system to maintain high image reproducibility while achieving four-color display capability.
Solution Approach 2:
The system applies different conversion parameters and backlight intensity levels to different regions of the display based on local image content. Regions with pure colors receive optimized parameters to maintain high color accuracy, while other regions can utilize the full four-color capability. This local quality approach ensures that image reproducibility is maintained in critical areas while achieving versatile four-color display capability overall.
Data Source
AI summary
A flat panel display includes a four-color conversion unit, a backlight control unit, a backlight module, and a pixel array. The four-color conversion unit provides a first set of four color image signals corresponding to three color image input signals based on a preliminary conversion lookup table and provides corresponding conversion scaling factors. The backlight control unit generates a backlight adjusting factor based on the conversion scaling factors. The backlight module provides a backlight output having an intensity adjusted according to the backlight adjusting factor. The four-color conversion unit further provides a second set of four color image signals corresponding to the three color image input signals based on the backlight adjusting factor. The pixel array displays an image according to the second set of four color image signals and the backlight output.