Multi-Screen Backlight Control with Individual Lumen Correction

The patent divides the unified backlight control into separate control paths for each screen. Each screen has its own backlight brightness adjustment mechanism that can be independently controlled, allowing the first screen and second screen to have different brightness levels simultaneously. This segmentation resolves the contradiction by enabling independent brightness adjustment while maintaining operational simplicity through automated correction algorithms.

The patent introduces correction values as additional parameters to the basic backlight brightness setting. By adding these correction parameters, the system can adjust the actual backlight brightness of each screen independently from the basic setting value, enabling fine-grained control over brightness consistency while keeping the overall adjustment process automated and simple.

The patent pre-calculates and stores correction values for each screen based on their individual characteristics and usage duration. These correction values are computed in advance and stored for later application, allowing the system to automatically compensate for screen differences without adding complex real-time control mechanisms. This preliminary action maintains control simplicity while achieving brightness uniformity.

The patent implements a feedback mechanism where the actual brightness output of each screen is monitored and used to adjust the correction values. This feedback loop ensures that individual screen characteristics and usage-induced variations are continuously compensated, maintaining brightness uniformity without requiring complex manual calibration or control mechanisms.