Row-Wise LED Luminance Control in Metal-Board Image Displays

The patent applies local quality by assigning different current values to light sources based on their positional characteristics. The control unit adjusts the current individually for each light source or group, creating localized control zones that compensate for the natural tendency toward central luminance concentration. This resolves the contradiction by maintaining structural simplicity while achieving luminance uniformity through position-dependent current allocation.

The patent segments the light source array into multiple groups or regions, each controlled by different current values. By dividing the otherwise uniform light source array into controllable segments, the system can apply differential current strategies to different areas, thereby achieving uniform luminance distribution without requiring complete individual control of every single light source.

The patent merges the heat dissipation function with the existing circuit board structure. Instead of adding separate heat dissipation fins, the circuit board itself is designed with heat dissipation characteristics, integrating thermal management into the structural component already present in the device. This resolves the contradiction by enhancing heat dissipation without increasing device complexity or size.

The circuit board is given multiple functions: electrical connection, structural support, and heat dissipation. By making the circuit board multi-functional, the patent eliminates the need for dedicated heat dissipation components, thereby enhancing thermal management while maintaining simple device structure and avoiding additional complexity.