Edge Light Backlight Unit Center Luminance Control

The patent applies local quality by dividing the backlight unit into multiple independent control regions (first through fourth regions) with different LED arrangements and drive characteristics. Each region has customized LED density, lens configurations, and drive circuit parameters to optimize local luminance characteristics, enabling reduced overall power consumption while maintaining perceived uniformity through localized optimization.

The patent implements dynamics by enabling independent drive control of LEDs in different regions through separate drive circuits. The controller can dynamically adjust drive currents, pulse width modulation (PWM) signals, and illumination timing for each region based on viewing conditions and content requirements, allowing flexible power management while maintaining luminance uniformity.

The patent applies segmentation by dividing the backlight unit into multiple functional regions with different LED arrangement patterns. Instead of a single uniform edge-light configuration, the backlight is segmented into regions with varying LED densities and positions, including center-region LEDs that directly illuminate the screen center, thereby maintaining luminance uniformity without excessive structural complexity.

The patent uses light-guiding plates and lens arrays as intermediaries to redistribute light from edge-mounted LEDs and center-mounted LEDs to achieve uniform illumination across the screen. These optical intermediaries mediate between the simplified edge-light structure and the requirement for uniform center screen luminance, enabling both goals to be achieved simultaneously.