Multi-display backlight intensity correction via cross-device communication

The patent merges the light intensity correction operations of multiple adjacent liquid crystal display devices by having each device's light intensity correcting section consider not only its own adjacent areas but also adjacent areas of other devices through communication sections. This combining approach ensures uniform brightness correction across the entire multi-display system, eliminating conspicuous boundaries between devices while maintaining the contrast ratio improvements from local dimming.

The patent introduces communication sections as intermediaries between adjacent liquid crystal display devices. These communication sections enable the exchange of light intensity information and correction data between devices without significantly increasing the complexity of individual device control circuits. The intermediary facilitates coordinated light intensity correction across the multi-display system, ensuring uniform image quality at device boundaries while keeping each device's internal control structure relatively simple.

The patent applies local quality correction by having each light intensity correcting section perform area-specific brightness adjustments based on both local image luminance characteristics and the luminance characteristics of adjacent areas (including those on other devices). This localized correction approach ensures that each area's backlight intensity is optimized for its specific content while simultaneously maintaining smooth transitions at boundaries, thereby preserving contrast ratio improvements while eliminating conspicuous boundaries.