Partitioned Backlight Compensation for LCD Color Saturation
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Solution Overview
Problem
The enhancement of backlight brightness in LCDs leads to fading of image colors, affecting the display effect.
Innovation Solution
A display apparatus and image processing method that utilizes a backlight gain parameter to determine a compensation parameter, optimizing the color brightness of the image by dynamically compensating chromaticity through a compensation parameter and peak brightness compensation curve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If backlight brightness is improved, then display brightness is enhanced, but image color saturation deteriorates
Solution Approach 1:
The backlight module is divided into multiple independently controllable partitions, allowing different brightness levels to be applied to different regions. This segmentation enables local brightness enhancement without uniformly increasing overall backlight intensity, thereby preventing color saturation loss while achieving the desired brightness improvement in specific areas.
Solution Approach 2:
Different regions of the display are assigned different quality characteristics through localized backlight control. High brightness is applied only to partitions requiring it, while other partitions maintain lower brightness to preserve color saturation. This local quality approach resolves the contradiction by applying brightness enhancement selectively rather than globally.
2Illumination intensity
If peak brightness of local partition is increased, then display effect is improved, but color fading occurs
Solution Approach 1:
The system employs feedback mechanisms where the controller monitors the brightness and color output of each partition, dynamically adjusting the backlight gain parameters to maintain optimal color saturation. When color fading is detected in a partition, the feedback loop reduces the backlight intensity for that specific partition, thereby preventing color fading while maintaining peak brightness where needed.
Solution Approach 2:
The invention dynamically changes the backlight gain parameter for each partition based on real-time display requirements. By adjusting this parameter, the system can achieve high peak brightness in specific partitions without causing color fading, as the parameter changes are optimized to maintain color accuracy while enhancing brightness where required.
Data Source
AI summary
A display apparatus, and an image processing method. The display apparatus can include at least one processor and a display. The at least one processor is configured to execute instructions to cause the display apparatus to: obtain backlight values of all the partitions according to a video signal, and obtain, according to the backlight values of all the partitions, an image signal of an image to be displayed; send the backlight values of all the partitions to a partition backlight processing module, so that the partition backlight processing module obtains a backlight gain parameter according to the backlight values of all the partitions; and receive the backlight gain parameter returned by the partition backlight processing module, determine a compensation parameter according to the backlight gain parameter, and obtain a compensated image signal according to the compensation parameter and the image signal.